DH Instruments E-DWT-10000-AF Operation And Maintenance Manual

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E-DWT-10000-AF

Electronic Deadweight Tester

Operation and Maintenance Manual

NSN 6685-01-566-1341

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

High pressure liquids and gases are potentially hazardous. Energy stored in these liquids and gases can be released unexpectedly and with extreme force. High pressure systems should be assembled and operated only by personnel who have been instructed in proper safety practices.

This instrument is not to be operated in any other manner than that specified by the manufacturer.

form or by any means, electronic or mechanical, for any purpose, without the express written permission of DH Instruments, a

Fluke Company 4765 East Beautiful Lane, Phoenix AZ 85044-5318, USA. DH Instruments makes sincere efforts to ensure accuracy and quality of its’ published materials; however, no warranty, expressed

or implied, is provided. DH Instruments disclaims any responsibility or liability for any direct or indirect damages resulting from the use of the information in this manual or products described in it. Mention of any product or brand does not constitute an endorsement by DH Instruments of that product or brand. This manual was originally composed in English and was subsequently translated into other languages. The fidelity of the translation cannot be guaranteed. In case of conflict between the English version and other language versions, the English version predominates.

Products described in this manual are manufactured under international patents and one or more of the following U.S. patents: 5,142,483; 5,257,640; 5,331,838; 5,445,035. Other U.S. and international patents pending.

AutoRange, AutoZ, DH Instruments, DH, DHI, CalTool, COMPASS, E-DWT, RPM4-E-DWT, QDUT, Q-RPT and SDS are trademarks, registered and otherwise, of DH Instruments, a Fluke Company.

Document No. 3338242 DHI Document No. 550166b 080624 Printed in the USA

TABLE OF CONTENTS

AABBLLEE

OONNTTEENNTTS

TABLE OF CONTENTS ...............................................................I

TABLES.................................................................................. V

FIGURES................................................................................VI

ABOUT THIS MANUAL............................................................ VII

1. INTRODUCTION ................................................................. 1

1.1 PRODUCT OVERVIEW ...........................................................................................................................1

1.2 SPECIFICATIONS ...................................................................................................................................2

1.2.1 GENERAL SPECIFICATIONS.......................................................................................................................2

1.2.2 BATTERY AND CHARGER PACK...............................................................................................................3

1.2.3 PRESSURE MEASUREMENT SPECIFICATIONS .......................................................................................3

1.2.3.1 REFERENCE PRESSURE TRANSDUCERS (RPT) .................................................................................3

1.2.3.2 ON-BOARD BAROMETER ........................................................................................................................4

1.3 VIEWS AND SCHEMATICS ....................................................................................................................4

1.3.1 E-DWT-10000-AF VIEWS..............................................................................................................................4

1.3.1.1 FRONT VIEW.............................................................................................................................................4

1.3.1.2 REAR VIEW ...............................................................................................................................................5

1.3.2 RPM4-E-DWT REFERENCE PRESSURE MONITOR VIEWS......................................................................5

1.3.2.1 FRONT PANEL ..........................................................................................................................................5

1.3.2.2 REAR PANEL.............................................................................................................................................6

1.3.3 BATTERY/CHARGER PACK VIEWS ...........................................................................................................6

1.3.4 E-DWT-10000-AF DIMENSIONS...................................................................................................................7

1.3.5 E-DWT-10000-AF HYDRAULIC SCHEMATIC..............................................................................................7

2. INSTALLATION .................................................................. 9

2.1 UNPACKING AND INSPECTION............................................................................................................9

2.1.1 REMOVING FROM PACKAGING .................................................................................................................9

2.1.2 INSPECTING CONTENTS.............................................................................................................................9

2.2 SITE REQUIREMENTS..........................................................................................................................10

2.3 SETUP ...................................................................................................................................................10

2.3.1 PREPARING FOR OPERATION.................................................................................................................10

2.3.2 SETTING UP AUTOTEST FILES ................................................................................................................10

2.4 OPERATIONAL CHECK........................................................................................................................11

2.4.1 RPM4-E-DWT PRESSURE MEASUREMENT ............................................................................................11

2.4.2 E-DWT PRESSURE GENERATION AND CONTROL ................................................................................11

2.5 SHORT TERM STORAGE.....................................................................................................................12

2.6 LONG TERM STORAGE, PREPARATION FOR SHIPPING.................................................................13

3. OPERATION..................................................................... 15

3.1 GENERAL OPERATING PRINCIPLES.................................................................................................15

3.1.1 MULTIPLE RANGES (HI AND LO Q-RPT, AUTORANGE)........................................................................15

3.1.2 PRESSURE READY/NOT READY..............................................................................................................16

3.1.3 AUTOMATED TEST AND CALIBRATION SEQUENCES ..........................................................................16

3.1.4 TYPICAL OPERATING SEQUENCE TO RUN A TEST ..............................................................................16

3.2 TEST PORT CONNECTION ..................................................................................................................17

3.2.1 RPM4-E-DWT ATM PORTS ........................................................................................................................18

3.3 BATTERY/CHARGER PACK................................................................................................................18

3.4 SELECTING THE HI OR LO Q-RPT......................................................................................................19

3.5 PRESSURE GENERATION AND ADJUSTMENT.................................................................................22

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

3.5.1 FILLING AND PRIMING, RESERVOIR PUMP............................................................................................22

3.5.2 PRESSURE GENERATION AND ROUGH ADJUSTMENT, VARIABLE VOLUME ...................................23

3.5.3 PRESSURE FINE ADJUSTMENT, FINE ADJUST VALVE ........................................................................24

3.6 RPM4-E-DWT USER INTERFACE........................................................................................................24

3.6.1 MAIN RUN SCREEN....................................................................................................................................24

3.6.2 FUNCTION / DATA KEYPAD LAYOUT AND PROTOCOL........................................................................26

3.6.3 OPTIONAL REMOTE [ENT] (ENTER) FOOTSWITCH ...............................................................................26

3.6.4 SOUNDS......................................................................................................................................................27

3.7 RPM4-E-DWT DIRECT FUNCTION KEYS............................................................................................27

3.7.1 SUMMARY...................................................................................................................................................27

3.7.2 [RANGE]......................................................................................................................................................28

3.7.3 [UNIT]...........................................................................................................................................................29

3.7.4 [MODE] ........................................................................................................................................................30

3.7.5 [AUTORANGE]............................................................................................................................................30

3.7.6 [LEAK CK]...................................................................................................................................................32

3.7.7 [DISPLAY]....................................................................................................................................................33

3.7.7.1 AVG (AVERAGE).....................................................................................................................................34

3.7.7.2 RATE........................................................................................................................................................35

3.7.7.3 DEV (DEVIATION) ...................................................................................................................................36

3.7.7.4 RPT ..........................................................................................................................................................37

3.7.7.5 HI/LO........................................................................................................................................................38

3.7.7.6 FREEZE ...................................................................................................................................................38

3.7.7.7 CLEAN .....................................................................................................................................................39

3.7.8 [HEAD].........................................................................................................................................................39

3.7.9 [SDS]............................................................................................................................................................41

3.7.10 [AUTOZ].......................................................................................................................................................41

3.7.11 [ENT] (RUN AUTOTEST) ............................................................................................................................42

3.7.11.1 AUTOTEST INITIALIZATION...................................................................................................................43

3.7.11.2 TEST EXECUTION ..................................................................................................................................44

3.8 [SETUP].................................................................................................................................................46

3.8.1 <1RANGE> ..................................................................................................................................................46

3.8.1.1 SAVING AN AUTORANGE RANGE ........................................................................................................46

3.8.1.2 DELETING AUTORANGE RANGES .......................................................................................................47

3.8.2 <2RES> (RESOLUTION).............................................................................................................................47

3.8.3 <3STAB> (STABILITY) ...............................................................................................................................48

3.8.4 <4UL> (UPPER LIMIT) ................................................................................................................................49

3.8.4.1 OVER PRESSURE FUNCTION...............................................................................................................49

3.8.5 <5ATEST>....................................................................................................................................................50

3.8.5.1 DATA........................................................................................................................................................50

3.8.5.2 FILE..........................................................................................................................................................51

3.9 [SPECIAL] .............................................................................................................................................53

3.9.1 <1AUTOZ>...................................................................................................................................................54

3.9.2 <2REMOTE>................................................................................................................................................55

3.9.2.1 <1COM1, 2COM2> ..................................................................................................................................56

3.9.2.2 <3IEEE-488>............................................................................................................................................56

3.9.2.3 <4FORMAT>............................................................................................................................................56

3.9.2.4 <5RS232 SELF-TEST>............................................................................................................................56

3.9.3 <3HEAD>.....................................................................................................................................................57

3.9.4 <4SDS>........................................................................................................................................................57

3.9.5 <5PREFS> ...................................................................................................................................................57

3.9.5.1 <1SCRSVR> ............................................................................................................................................58

3.9.5.2 <2SOUND> ..............................................................................................................................................58

3.9.5.3 <3TIME>...................................................................................................................................................59

3.9.5.4 <4ID>........................................................................................................................................................59

3.9.5.5 <5LEVEL> (SECURITY) ..........................................................................................................................60

3.9.6 <6PUNIT>.....................................................................................................................................................62

3.9.7 <7INTERN>..................................................................................................................................................63

3.9.7.1 <1BARO>.................................................................................................................................................64

3.9.7.2 <2READRT> ............................................................................................................................................64

3.9.7.3 <3RPT2X>................................................................................................................................................65

3.9.7.4 <4LO VNT> ..............................................................................................................................................65

3.9.7.5 <5LOG>....................................................................................................................................................65

3.9.8 <8CAL>........................................................................................................................................................66

3.9.9 <9RESET> ...................................................................................................................................................66

3.9.9.1 <1SETS>..................................................................................................................................................66

3.9.9.2 <2 UNITS> ...............................................................................................................................................67

3.9.9.3 <3ATEST>................................................................................................................................................67

3.9.9.4 <4 CAL> ...................................................................................................................................................67

3.9.9.5 <5 ALL>....................................................................................................................................................68

TABLE OF CONTENTS

4. REMOTE OPERATION ....................................................... 69

4.1 OVERVIEW............................................................................................................................................69

4.2 INTERFACING.......................................................................................................................................69

4.2.1 RS232 INTERFACE.....................................................................................................................................69

4.2.1.1 COM1.......................................................................................................................................................69

4.2.1.2 COM2.......................................................................................................................................................70

4.3 PROGRAMMING FORMATS.................................................................................................................70

4.3.1 PROGRAM MESSAGE FORMAT ...............................................................................................................70

4.3.2 ERROR QUEUE...........................................................................................................................................71

4.3.2.1 USI NG Q U E R Y T Y P E C O M M A N D S...................................................................................................71

4.4 COMMANDS..........................................................................................................................................72

4.4.1 PROGRAMMING MESSAGES....................................................................................................................72

4.4.2 ERROR MESSAGESS.................................................................................................................................73

4.4.3 PROGRAM MESSAGE DESCRIPTION OVERVIEW..................................................................................74

4.4.4 PROGRAM MESSAGE DESCRIPTIONS....................................................................................................75

5. MAINTENANCE, ADJUSTMENTS AND CALIBRATION ............... 93

5.1 OVERVIEW............................................................................................................................................93

5.2 RPM4-E-DWT MAINTENANCE.............................................................................................................93

5.2.1 AUTOZERO OF Q-RPTS .............................................................................................................................93

5.2.2 ADJUSTMENT OF THE ON-BOARD BAROMETER..................................................................................94

5.3 RPM4-E-DWT Q-RPT CALIBRATION...................................................................................................94

5.3.1 PRINCIPLE ..................................................................................................................................................94

5.3.1.1 PA AND PM COEFFICIENTS ..................................................................................................................95

5.3.2 EQUIPMENT REQUIRED............................................................................................................................95

5.3.3 SET-UP AND PREPARATION ....................................................................................................................96

5.3.4 RECOMMENDED CALIBRATION POINT SEQUENCE .............................................................................96

5.3.5 RPT CALIBRATION USING CALTOOL FOR Q-RPTS SOFTWARE.........................................................97

5.3.6 EDITING AND VIEWING Q-RPT CALIBRATION INFORMATION.............................................................97

5.3.7 Q-RPT ADJUSTMENT WITHOUT CALTOOL FOR Q-RPTS SOFTWARE................................................98

5.4 E-DWT MAINTENANCE........................................................................................................................99

5.4.1 E-DWT OVERHAUL.....................................................................................................................................99

5.5 E-DWT REPAIR...................................................................................................................................100

5.5.1 REMOVING RPM4-E-DWT FROM THE E-DWT .......................................................................................100

5.5.2 OPENING AND CLOSING THE RPM4-E-DWT ENCLOSURE.................................................................101

5.5.3 RELOADING EMBEDDED SOFTWARE INTO RPM4-E-DWT FLASH MEMORY...................................101

5.5.4 RE P L A C I N G THE E - D W T H I G H P R E S S U R E R UPTU R E D I S K ...................................................... 102

5.5.5 RPM4-E-DWT SUBASSEMBLY DESCRIPTION AND LOCATION.................................................104

5.5.5.1 MICRO BOARD......................................................................................................................................105

5.5.5.2 DRIVER BOARD....................................................................................................................................105

5.5.5.3 ON-BOARD BAROMETER ....................................................................................................................105

5.5.5.4 Q-RPT MODULE....................................................................................................................................105

5.5.5.5 DISPLAY ................................................................................................................................................106

5.5.5.6 COOLING FAN.......................................................................................................................................106

5.5.6 HYDRAULIC SCHEMATIC OF Q-RPT MODULE.....................................................................................106

5.6 ILLUSTRATED PARTS BREAKDOWN ..............................................................................................106

5.6.1 E-DWT-10000-AF ILLUSTRATED PARTS BREAKDOWN ......................................................................106

5.6.2 E-DWT-10000-AF DETAILED HYDRAULIC SCHEMATIC.......................................................................109

5.6.3 RPM4-E-DWT A70M/A7M-AF ILLUSTRATED PARTS BREAKDOWN...................................................111

6. TROUBLESHOOTING .......................................................115

7. APPENDIX ......................................................................119

7.1 UNIT CONVERSION............................................................................................................................119

7.1.1 PRESSURE................................................................................................................................................119

8. WARRANTY ....................................................................121

8.1 OVERVIEW..........................................................................................................................................121

9. GLOSSARY .....................................................................123

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

OOTTEES

TABLES & FIGURES

AABBLLEES

Table 1. E-DWT-10000-AF packing list ....................................................................................................... 9

Table 2. Settings and what they are specific to (range, measurement mode, Q-RPT, system)................16

Table 3. Summary of RPM4-E-DWT function key operation.....................................................................27

Table 4. Settings made by AutoRange......................................................................................................31

Table 5. Security levels..............................................................................................................................61

Table 6. UNIT function - available units of measure..................................................................................63

Table 7. READRT – display update rates..................................................................................................64

Table 8. Reset – Sets.................................................................................................................................67

Table 9. Reset – Cal ..................................................................................................................................68

Table 10. Reset – All..................................................................................................................................68

Table 11. COM1 pin designations and connections..................................................................................69

Table 12. COM2 DB-9F pin designations..................................................................................................70

Table 13. Program message list ................................................................................................................72

Table 14. Error #s and descriptions...........................................................................................................73

Table 15. Calibration point sequence for A7M and A70M Q-RPTs........................................................... 97

Table 16. E-DWT exterior illustrated parts breakdown (see Figure 16) .................................................107

Table 17. E-DWT internal illustrated parts breakdown (see Figure 17)..................................................108

Table 18. E-DWT-10000-AF, detailed hydraulic schematic illustrated parts breakdown

Table 19. RPM4-E-DWT rear panel, external view illustrated parts breakdown

Table 20. RPM4-E-DWT Q-RPT assembly, internal view illustrated parts breakdown

Table 21. RPM4-E-DWT overall, interior view illustrated parts breakdown

Table 22. RPM4-E-DWT display assembly, interior view illustrated parts breakdown

Table 23. Troubleshooting guide .............................................................................................................115

Table 24. Pressure unit of measure conversion coefficients ...................................................................119

Table 25. DHI Authorized Service Providers ...........................................................................................121

(see Figure 18) ......................................................................................................................109

(see Figure 19) ......................................................................................................................111

(see Figure 20) ......................................................................................................................112

(see Figure 21) ......................................................................................................................113

(see Figure 22) ......................................................................................................................114

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

IIGGUURREES

Figure 1. E-DWT-10000-AF front view.........................................................................................................4

Figure 2. E-DWT-10000-AF rear view ......................................................................................................... 5

Figure 3. RPM4-E-DWT reference pressure monitor front panel ................................................................5

Figure 4. RPM4-E-DWT reference pressure monitor rear panel.................................................................6

Figure 5. Battery/charger pack front and rear E-DWT-10000-AF dimensions.............................................6

Figure 6. E-DWT-10000-AF dimensions......................................................................................................7

Figure 7. E-DWT-10000-AF hydraulic schematic ........................................................................................7

Figure 8. Battery pack/charger...................................................................................................................19

Figure 9. E-DWT-10000-AF front view.......................................................................................................21

Figure 10. E-DWT-10000-AF hydraulic schematic ....................................................................................21

Figure 11. MAIN RUN screen display fields...............................................................................................25

Figure 12. Keypad layout...........................................................................................................................26

Figure 13. RPM4-E-DWT removal from E-DWT......................................................................................101

Figure 14. RPM4-E-DWT internal view....................................................................................................104

Figure 15. Hydraulic schematic RPM4-E-DWT Q-RPT Module ...............................................................106

Figure 16. E-DWT exterior view................................................................................................................107

Figure 17. E-DWT internal view................................................................................................................108

Figure 18. E-DWT detailed hydraulic schematic.......................................................................................110

Figure 19. RPM4-E-DWT rear panel, external view illustrated parts breakdown.....................................111

Figure 20. RPM4-E-DWT Q-RPT assembly, internal view illustrated parts breakdown...........................112

Figure 21. RPM4-E-DWT overall, interior view illustrated parts breakdown.............................................113

Figure 22. RPM4-E-DWT display assembly, interior view illustrated parts breakdown............................ 114

ABOUT THIS MANUAL

BBOOUUTT

This manual is intended to provide the user with the basic information necessary to operate an E-DWT-10000-AF electronic deadweight tester (Portable Hydraulic Gauge Calibrator). It also includes a great deal of additional information provided to allow you to optimize the use of the instrument and take full advantage of its many features and functions.

Before using the manual, take a moment to familiar ize yo urself with the Tab le of Conten ts struc ture: Sec tions

1.1, 2 and 3. Section 4 is for remote communication with the RPM4-E-DWT from an external computer.

tion 5 p

Sec to trou

For those of you who “don’t read manuals”, go directly to Section 2.3 to set up your E-DWT and then go to Section 3.1.4 for a typical test procedure. This will get you up and running quickly with a minimal risk of causing damage to yourself or your new instrument. THEN… when you have questions or start to wonder about all the great features you might be missing, get into the manual!

(CAUTION) is used in throughout the manual to identify user warnings and cautions.

rovides maintenance and calibration information. Section 6 is a quick troubleshooting guide. Use it

bleshoot unexpected E-DWT behavior based on the symptom of that behavior.

HHIISS

AANNUUAAL

Manual Conventions

(NOTE) is used throughout the manual to identify operating and applications advice and additional explanations.

[ ] indicates direct function keys (e.g., [RANGE]).

< > indicates RPM4-E-DWT screen displays (e.g., <1yes>).

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

OOTTEES

1. INTRODUCTION

11.

NNTTRROODDUUCCTTIIOON

1.1 PRODUCT OVERVIEW

E-DWT-10000-AF is an electronic deadweight tester designed to replace mechanical piston-cylinder based deadweight testers with a lighter weight, easier to use alternative. The E-DWT is designed to be used in the lab or instrument shop or to be taken into the field for performing in-situ calibrations and tests. This high performance hydraulic pressure calibration system combines an electronic reference pressure monitor and manually operated pressure generation and control hardware in a single, compact and rugged package. E-DWT offers the ease of use and precision of continuous, real time electronic pressure measurement with the simple and direct pressure control of high quality manual pressure hardware.

The electronic reference pressure monitor is a special version of DHI’s RPM4, designated RPM4-E-DWT A70M/A7M-AF. RPM4-E-DWT A70M/A7M-AF covers the range from 0 to 10 000 psi gauge pressure using two high precision quartz reference pressure transducers (Q-RPTs) and an on-board barometer to measure pressure.

RPM4-E-DWT A70M/A7M-AF is controlled locally by the operator using its front panel display, keypad and foot pedal or remotely by a computer using ASCII character command strings over its RS-232 interface.

RPM4-E-DWT A70M/A7M-AF uses an AutoRange feature to automatically select the most appropriate Q-RPT and to optimize the E-DWT setup to cover the desired range of operation. A half-turn valve isolates and protects the Lo Q-RPT from high pressure when the Hi Q-RPT is in use. Visual and audible indicators assist the operator in setting the shut off valve correctly.

The E-DWT includes the hardware necessary to fill the system under test with oil and generate and precisely adjust pressure across the E-DWT’s 10 000 psi (70 MPa) range.

The E-DWT-10000-AF system is delivered in a rugged, molded plastic transport case and includes two battery/charger packs.

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

1.2 SPECIFICATIONS

1.2.1 GENERAL SPECIFICATIONS

Power requirements:

To RPM4-E-DWT:

To 12 VDC AC to DC power

supply :

Temperature

Operating:

Storage:

Weight

E-DWT-10000-AF unit:

E-DWT system w/ accessories

in case:

Dimensions

E-DWT-10000-AF footprint:

E-DWT-10000-AF height:

System transport case:

Pressure range: 0 to 10 000 psi (70 MPa) gauge pressure

Operating medium: Oil (di-ethyl-hexyl sebacate)

Reservoir capacity: 300 cc (18 in.

Variable volume displacement: 3 cc (0.18 in.

Priming pump displacement: 3.7 cc (0.23 in.

12 VDC, 1.2 A 100 to 240VAC, 50-60 Hz

18 to 28 °C

- 20 to 70 °C

14 kg (30 lb) approx.

27.3 kg (60 lb) approx.

41.4 cm W x 37.1 cm D (16.3 in. x 14.6 in.)

26.9 cm (10.6 in.), 33.6 cm (13.2 in.) to max variable volume handle stroke

39.4 cm H x 79.5 cm W x 51.8 cm D (15.5 in. x 31.3 in. x 20.4 in.)

)

TEST pressure connection: DH500 female, adaptors to 1/4 in. and 1/8 in. NPT female included.

Pressure Limits: Maximum Working Pressure: 10 000 psi (70 MPa)

Communication ports: RS232 (COM1, COM2)

DH500 is a gland and collar type fitting for 6mm (1/4 in.) coned and left

hand threaded tubes equivalent to AE F250C, HIP HF4, etc.

Maximum Pressure Without Damage: 12 000 psi (83 MPa) Internal rupture disk burst pressure: 11500 psi (79 MPa)

When Lo Q-RPT is connected to TEST pressure:

Maximum Working Pressure: 1 000 psi (7 MPa) Maximum Pressure Without Damage: 2200 psi (15.2 MPa) Pressure relief valve setting: 1 500 psi (10.3 MPa)

Maximum priming pump pressure: 100 psi (700 kPa)

1. INTRODUCTION

1.2.2 BATTERY AND CHARGER PACK

Power Requirements 100 to 240 VAC, 50/60 Hz, 15 W max consumption

Operating Temperature Range 0 to 50 °C

Storage Temperature Range - 20 to 70 °C

Weight 2 kg (4.4 lb)

Dimensions 8 cm H x 22.5 cm W x 20 cm D (3.1 in. x 8.9 in. x 7.9 in.)

Battery Type Nickel metal-hydride

Battery Voltage 12 VDC

Battery Capacity Typical: 9000 mAh

Charge Time Full charge from empty, 14 to 16 hours approx.

Approx. Run Time, Full Charge 8 to 12 hours

Min: 8200 mAh

1.2.3 PRESSURE MEASUREMENT SPECIFICATIONS

1.2.3.1 REFERENCE PRESSURE TRANSDUCERS (RPT)

E-DWT-10000-AF is configured with two quartz reference pressure transducer (Q-RPT) modules to measure pressure.

The Q-RPTs are intrinsically absolute, operating against a sealed vacuum reference. Gauge pressure is defined by offsetting atmospheric pressure and applying dynamic compensation for atmospheric changes using the on-board barometer (see Section 3.9.1).

Warm Up Time 15 minute temperature stabilization recommended from

Compensated Temperature Range 5 to 35 °C

Operating Temperature Range 18 to 28 °C

A7M Q-RPT A70M Q-RPT

Maximum Range 1 000 psi (7 MPa) 10 000 psi (70 MPa)

Resolution 0.01 % of active range default.

Precision

Temperature effect

Predicted Stability

Measurement Uncertainty

1. Combined linearity, hysteresis, and repeatability.

2. Maximum influence of ambient temperature on indicated pressure from 0 to 50ºC

3. Predicted Q-RPT measurement stability limit (k=2) over two years assuming regular use of AutoZero function and short term stability between rezeroing. As stability can only be predicted and varies from Q-RPT to Q-RPT, stability for a specific Q-RPT should be established from experience.

cold power up.

User adjustable to 1 ppm of Q-RPT maximum or 10 ppm of active AutoRange, whichever is larger.

± 0.015 % of reading, or

0.045 psi, whichever is larger

± 0.0006% of span per ºC deviation from calibration

temperature (23ºC)

± 0.01% of reading or 0.02

psi, whichever is greater

± 0.1% of reading, or

0.1 psi, whichever is greater

± 0.015% of reading, or

0.45 psi, whichever is larger

± 0.01% of reading or 0.1

psi, whichever is greater

± 0.1% of reading, or

1.0 psi, whichever is greater

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

4. Maximum deviation of the Q-RPT indication from the true value of applied pressure including precision, predicted two year stability with rezeroing, temperature effect from 18 to 28 ºC and calibration uncertainty (assumes calibration reference uncertainty of ±0.02% of reading, k=2), combined and expanded (k=2) following the ISO “Guide to the Expression of Uncertainty in Measurement.”.

1.2.3.2 ON-BOARD BAROMETER

The measurement uncertainty of the on-board barometer is not significant to E-DWT measurement uncertainty. It is used only to measure small, short term changes in atmospheric pressure to provide dynamic compensation of the Q-RPT’s atmospheric pressure offset in gauge pressure measurement mode (see Section 3.9.1)

Sensor Technology: Micro-machined silicon

Warm Up Time: None required

Resolution: 0.1 Pa (0.000015 psi)

1.3 VIEWS AND SCHEMATICS

1.3.1 E-DWT-10000-AF VIEWS

1.3.1.1 FRONT VIEW

1. TEST port (DH500F)

2. Reservoir cap vent valve

3. Priming pump

4. Reservoir cap

5. Reference pressure monitor (RPM4-E-DWT)

6. Test shut off valve and fine pressure adjustment 7 ‘Lo Q-RPT shut off’ valve position prompt LED

8. Lo Q-RPT shut off valve

9. ‘Lo Q-RPT active’ valve position prompt LED

10. ‘Lo Q-RPT active’ caution indicator

11. Reservoir shut off valve

12. Variable volume (pressure generation)

13. Variable volume piston position indicator

Figure 1. E-DWT-10000-AF front view

1. INTRODUCTION

1.3.1.2 REAR VIEW

1. Reservoir cap

2. Priming pump

3. Reservoir cap vent valve

4. TEST connection (DH500 F)

Figure 2. E-DWT-10000-AF rear view

5. Power connection (12 VDC)

6. Footswitch (remote [ENT]) connection (footswitch not included)

1.3.2 RPM4-E-DWT REFERENCE PRESSURE MONITOR VIEWS

1.3.2.1 FRONT PANEL

1. Pressure ready/not ready indicator

2. 2 x 20 vacuum fluorescent display

3. Remote activity indicator

4. Cursor control keys

5. Multi-function keypad

Figure 3. RPM4-E-DWT reference pressure monitor front panel

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

1.3.2.2 REAR PANEL

1. 12VDC power supply connection

2. Accessories connector (to E-DWT rear panel FOOTSWITCH and LEDs)

3. COM2 connector

4. COM1 connector

5. Fan

Figure 4. RPM4-E-DWT reference pressure monitor rear panel

6. TEST(+) pressure port, Lo Q-RPT

7. TEST(+) pressure port, Hi Q-RPT

8. ATM pressure port, Lo Q-RPT

9. ATM pressure port, Hi Q-RPT

10. Product label (bottom of case)

1.3.3 BATTERY/CHARGER PACK VIEWS

1. Cooling fan

2. 12VDC output connector (to E-DWT)

3. IEC power connection

4. ON/OFF switch (ON – battery connected to charger; OFF - battery connected to 12 VDC output/E-DWT)

Figure 5. Battery/charger pack front and rear E-DWT-10000-AF dimension s

5. Charge level indicator

6. Charge level check switch

7. Battery charging indicator (green – charging; green flashing – fully charged.

1. INTRODUCTION

1.3.4 E-DWT-10000-AF DIMENSIONS

Figure 6. E-DWT-10000-AF dimensions

1.3.5 E-DWT-10000-AF HYDRAULIC SCHEMATIC

1. TEST port

2. System pressure rupture disc

3. Reservoir

4. Reservoir vent valve

5. Priming pump

6. Test shut off and fine adjustment valve

7. Lo Q-RPT shut off valve

8. Lo Q-RPT pressure relief valve

9. Reservoir shut off valve

10. Variable volume

11. Lo Q-RPT (ref pressure transducer)

12. Hi Q-RPT (ref pressure transducer)

Figure 7. E-DWT-10000-AF hydraulic schematic

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

OOTTEES

2. INSTALLATION

22.

NNSSTTAALLLLAATTIIOON

2.1 UNPACKING AND INSPECTION

2.1.1 REMOVING FROM PACKAGING

E-DWT-10000-AF complete with accessories is delivered in a reusable, molded plastic shipping container with polyurethane inserts to hold it in place.

Remove the E-DWT-10000-AF and its accessories from the shipping container and remove each element from its protective plastic bag.

Retain the shipping container for repacking the E-DWT to take it into the field or to ship it

for recalibration or repair.

2.1.2 INSPECTING CONTENTS

Check that all items are present and have no visible damage. If damage is noted, report it to your Receiving Department for appropriate action.

A new E-DWT-10000-AF includes all items listed in Table 1.

Table 1. E-DWT-10000-AF packing list

DESCRIPTION PART NO.

E-DWT-10000-AF electronic deadweight tester 3322392

ACCESSORIES: 3338865

1 ea. Transport case (with inserts) (used for original

shipment) 2 ea. Battery/charger pack 3338787 1 ea. Battery/charger pack to E-DWT power cable 3335937 2 ea. Power cord (7.5 ft) 3133781 1 ea. 12 VDC power supply pack 3335610 4 ea. Handle, variable volume 3329907 1 ea. DH500 M x 1/4 in. NPT F adaptor 3335561 1 ea. DH500 M x 1/8 in. NPT F adaptor 3142684 1 ea. E-DWT-10000-AF Documentation Disk including:

• E-DWT-10000-AF Operation and Maintenance Manual, p/n 550166

1 ea. Calibration Report 3152121 1 ea. Test Report (included only if the E-DWT-10000-AF

is delivered under AFMETCAL contract FY2333-07M-0025)

1 ea. General Accessories Disk 3139043

3329777

3338256

3338793

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

2.2 SITE REQUIREMENTS

Install E-DWT-10000-AF on a flat, stable surface at a convenient height. If using the battery/charger pack, consider its placement.

When used with its battery/charger pack, E-DWT-10000-AF requires no external support facilities. If not using the battery, an electrical power source of 100 to 240VAC, 50-60 Hz is required.

2.3 SETUP

2.3.1 PREPARING FOR OPERATION

To prepare E-DWT-10000-AF for check out and operation:

Remove the protective plastic sheet from the front panel display. Familiarize yourself briefly with the E-DWT front and real panels and controls (see

Section 1.3.1).

Connect the 12 VDC power supply pack to a source of 100 to 240V, 50-60 Hz AC power

and to the 12 VDC connection on the rear of the E-DWT; or, use the battery/charger pack and cable if battery has been charged (see Section 3.3).

cting power causes the RPM4-E-DWT to power up.

Con

Observe the front panel display as the RPM4-E-DWT initializes, error checks and goes to

the MAIN RUN screen (see Section 3.6.1). If the RPM4-E-DWT fails to reach the main run screen, service observed and contact a DHI Authorized Service Provider (see Section 1, Table 25).

ck that o

Che red LED should NOT be ON). If neither of the green LEDs lights, check that the 12 pin circular connector on the rear panel of the RPM4-E-DWT itself is properly connected to

the J1 ACC. connector. Install the four variable volume handles into the variable volume hub on the front of the E-DWT. Leave the stainless steel plug in the top surface TEST port. Check that the gland holding

the plug is tight. Check/Set Security Level

RPM4-E-DWT has a security system based on user levels. By default, the security

system is set to “low”, which includes access restriction to internal calibration coefficients,

and there is no password required to change the security level. See Section 3.9.5.5 for

information on

the security level that is appropriate for the RPM4-E-DWT and set a password if desired.

RPM4-E-DWT is delivered with the security level set to “low” to avoid inadvertent altering of critical internal settings but with access to changing security levels unrestricted. It is recommended that the low security level be maintained at all times and password protection be implemented if control over setting of security levels is desired.

ne of the two green Valve Status LEDs on the front of the E-DWT is lit (the

the security level system. As part of the RPM4-E-DWT startup, determine

is required. Record the sequence of operations and displays

2.3.2 SETTING UP AUTOTEST FILES

E-DWT’s RPM4-E-DWT supports automated test/calibration sequences. AutoTest sequence parameters for testing specific DUTs can be stored in File AutoTest files and recalled to run a test. Consider setting up File AutoTest files for frequently tested DUTs as part of the E-DWT set up process (see Section 3.1.3).

2. INSTALLATION

2.4 OPERATIONAL CHECK

2.4.1 RPM4-E-DWT PRESSURE MEASUREMENT

See Figure 1 and Figure 7 for an E-DWT view and schematic when following this procedure.

Check that one of the two green Valve Status LEDs on the front panel of the E-DWT is lit

(the red LED should NOT be ON). If neither of the green LEDs on the E-DWT front panel lights, check that the 12 pin circular connector at the rear of the RPM4-E-DWT itself is properly connected to the J1 ACC. connector.

Let the RPM4-E-DWT warm up with power ON for approximately 15 minutes. Open the reservoir vent valve by turning it CCW. Open the reservoir shut off valve by turning it CCW.

Put the lo Q-RPT shut off valve into the Lo Q-RPT Active position (turn fully CCW) . This

opens the Lo and Hi Q-RPTs to the E-DWT TEST port.

Use [RANGE] (see Section 3.7.2) to select the Lo Q-RPT. If desired, change the

pressure unit of measure using [UNIT] (see Section 3.7.3).

The value indicated should be near zero. Press [AutoZ]. This runs AutoZ to zero the Q-

RPT reading (see Section 3.7.10). Upon return to the main run screen, observe that the indication of measured pressure h E-DWT may need repair.

as zeroed. If the display fails to zero properly, the

Use [RANGE] to select the Hi Q-RPT (see Section 3.7.2) and repeat the zeroing process.

If the display fails to zero properly, the E-DWT may need repair.

It is normal for RPM4-E-DWT to indicate a value other than zero when vented when gauge mode is first entered or ranges are changed, especially if AutoZ is OFF, RPM4-E-DWT has been OFF for some time or its location has changed.

2.4.2 E-DWT PRESSURE GENERATION AND CONTROL

Perform RPM4-E-DWT pressure measurement operational check (see Section 2.4.1) before the pressure generation and control check.

Refer to Figure 9 and Figure 10 when following this procedure.

Check that there is calibration fluid (di-ethyl hexyl sebacate) in the E-DWT reservoir (the

E-DWT is supplied with the reservoir full).

Open the reservoir vent valve by rotating it CCW. Open the reservoir shut off valve. Set the variable volume to start position. Rotate variable volume handles CCW until red

of variable volume piston position indicator on top of E-DWT is fully retracted.

Put the Lo Q-RPT shut off valve into the Lo Q-RPT Active position (rotate valve fully CCW).

This opens the Lo and Hi Q-RPTs to the E-DWT pressure generation and control system. Use [RANGE] (see Section 3.7.2) to select the Lo Q-RPT. If desired, change the

pressure unit of measu

With the Lo Q-RPT connected, never exceed pressure of 1000 psi (7 MPa) or the Lo Q-RPT could be permanently damaged. If the red CAUTION indicator flashes and/or an audible alarm sounds, immediately reduce pressure to avoid damaging an E-DWT Q-RPT.

re using [UNIT] (see Section 3.7.3).

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

Check that the stainless steel plug is installed in the E-DWT TEST port and that the gland

holding the plug is tight.

Slowly lift the reservoir pump handle and then depress at moderate speed with firm, even

pressure. With a brief delay, the pressure indicated by the RPM4-E-DWT should rise. If the pressure does not rise above 20 psi (130 kPa), it is likely there is air in the E-DWT hydraulic circuit, most likely in the low pressure PFA tubing between the reservoir and the rest of the system. It is normal for the pressure to drop when the reservoir pump is released since the pump is vented by releasing it.

Close the reservoir shut off valve and check that the test shut off valve is open. Slowly rotate the variable volume CW and observe the RPM4-E-DWT display. The

indicated pressure should increase. Slowly increase the pressure to 1000 psi (7 MPa) and stop. The pressure should decrease, more and more slowly, and eventually stabilize. If the pressure decreases indefinitely (more than 5 minutes), there is probably a leak in the E-DWT and it may require service.

Rotate the variable volume handle CCW to reduce pressure to about 100 psi (700 kPa)

and open the reservoir shut off valve.

Put the Lo Q-RPT shut off valve into the Lo Q-RPT Shut Off position (valve rotated fully CW).

This isolates the Lo Q-RPT from the E-DWT pressure generation and control system.

If the red CAUTION indicator flashes and/or an audible alarm sounds at any time, immediately reduce pressure to avoid damaging an E-DWT Q-RPT.

Close the reservoir shut off valve and check that the test shut off valve is open. Slowly rotate the variable volume CW and observe the RPM4-E-DWT display. The

indicated pressure should increase. Slowly increase the pressure to 10 000 psi (70 MPa), stop and wait. The pressure should decrease, more and more slowly and eventually stabilize. If the pressure decreases indefinitely (more than 5 minutes), there is probably a leak in the E-DWT and it may require service.

Rotate the variable volume handle CCW to reduce pressure to about 100 psi (700 kPa)

and open the reservoir shut off valve.

2.5 SHORT TERM STORAGE

The following is recommended for short term storage (not shipping or transport) of E-DWT-10000-AF:

• Open the reservoir shut off valve.

• Disconnect power.

Use [RANGE] (see Section 3.7.2) to select the Hi Q-RPT.

2. INSTALLATION

2.6 LONG TERM STORAGE, PREPARATION FOR SHIPPING

The following is recommended for long term storage and/or shipping of E-DWT-10000-AF:

E-DWT-10000-AF is designed to be shipped with its reservoir full of calibration fluid. If the instructions

below are followed carefully, it is not necessary to empty the reservoir prior to shipment.

• IMPORTANT: Close the reservoir cover fully by rotating it CW until snug, with reservoir vent valve aligned with CLOSE position.

• IMPORTANT: Close the reservoir shut off valve by rotating it CW until snug.

• IMPORTANT: Plug the TEST port.

• Remove (by unscrewing) the four variable volume handles on the front of the E-DWT.

• Close the test shut off valve.

• Place the E-DWT-10000-AF in the custom shipping/storage case in which it was delivered.

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

OOTTEES

3. OPERATION

33.

PPEERRAATTIIOON

3.1 GENERAL OPERATING PRINCIPLES

3.1.1 MULTIPLE RANGES (HI AND LO Q-RPT, AUTORANGE)

The E-DWT-10000-AF’s Reference Pressure Monitor (RPM4-E-DWT) has two Quartz Reference Pressure Transducers (Q-RPTs). The A70M (10 0 00 psi) Q-R PT is des igna ted th e Hi Q-RPT. The A7M (1 000 psi) Q-RPT is designated the Lo Q-RPT. Which Q-RPT is currently active is indicated continuously by characters in the upper right hand corner of the MAIN RUN screen and most other screens.

Each RPM4-E-DWT Q-RPT has a default range which is its maximum range. Additional ranges, lower than the Q-RPT’s maximum, may also be created using AutoRange and AutoTest (see Sections 3.7.5, 3.1.3). Ranges created using AutoRange are temporary but may be save

d with all their settings for reactivation (see Section 3.8.1).

The ranges av and/or created

An RPM4-E-DWT range i range, its current unit of measure and its full scale pressure. The range screen is:

1. Q-RPT designator.

2. Type of range. DF for the Q-RPT’s default range; AR for a range created by AutoRange.

3. Q-RPT position designator.

4. Current pressure unit of measure.

5. Full scale pressure

Most settings made in an RPM4-E-DWT range, such as unit of measure, display resolution and stability setting are specific to the range. Settings selected while one range is active apply to that range and not to other ranges. The range specific settings are stored with the range and recalled whenever the range is made active. This makes setting up ranges a convenient way to store and recall frequently used operating configurations. See Table 2 for a listing of RPM4-E-DWT system specific.

ailable on the RPM4-E-DWT are accessed using [RANGE] (see Section 3.7.2)

using [AutoRange] (see Section 3.7.5).

s identified by a range screen showing the Q-RPT used by the

Active A70M DF Hi psi 10000g

adjus

tments and settings and whether they are range, Q-RPT or

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

Table 2. Settings and what they are specific to

(range, measurement mode, Q-RPT, system)

SETTING PURPOSE SPECIFIC TO SECTION

[Unit] Set pressure unit of measure Range 3.7.3 [Display] Set bottom line display function System 3.7.7 [Head] Set fluid head correction height, fluid, unit of

[SDS] Not used in this RPM4-E-DWT model Not used None [AutoZ] Run AutoZ Q-RPT and measurement mode 3.7.10 Resolution Set pressure display resolution Range 3.8.2 Stability Set Ready/Not Ready stability test. Range 3.8.3 Upper Limit Set upper and lower pressure limit alarm Range and measurement mode 3.8.4 AutoZ AutoZ, ON/OFF, set and view values Q-RPT and measurement mode 3.9.1 Screen Saver,

Sound, Time, ID, Level

Cal Various Q-RPT and barometer calibration

measure

Set system user preferences System 3.9.5

functions, including turning off absolute and negative gauge modes

System 3.7.8

Q-RPT or barometer 5.2.2

3.1.2 PRESSURE READY/NOT READY

There is a Ready/Not Ready indicator LED on the RPM4-E-DWT front panel to the left of the display. It is intended to provide the user with a clear and objective indication of when a stable pressure has been achieved. Ready is indicated when the current stability (rate of change) of pressure is less than the stability limit. The user can set the stability limit (see Section 3.8.3) or the stability limit can be set automat Sections 3.7.5, 3.1.3). The Ready indication

is often used when comparing the

ically by a Au

toRange or AutoTest (see

RPM4-E-DWT and a test device to indicate when a valid reading can be made. The Ready/Not Ready LED indications are:

<Green > Pressure Ready The pressure stability is within the stability limit. <Red> Pressure Not Ready The pressure stability is NOT within the stability limit.

The default stability criterion is 0.01% of full scale of the active range per second.

3.1.3 AUTOMATED TEST AND CALIBRATION SEQUENCES

The RPM4-E-DWT AutoTest function supports “Quick” and “File” automated calibration sequences. These automatically AutoRange the RPM4-E-DWT, setting its resolution, stability limit and upper limit based on the characteristics of the device under test. They also prompt the user through the increments of the calibration sequence and log calibration data. The AutoTest function should be used for most common calibration tasks, especially calibration of analog pressure gauges.

3.1.4 TYPICAL OPERATING SEQUENCE TO RUN A TEST

The typical operating sequence to run a test is as follows:

AutoZero the RPM4-E-DWT:

Disconnect the E-DWT TEST port. Close the reservoir shut off valve.

3. OPERATION

Press [AutoZ] on the RPM front panel (see Section 3.7.10).

Connect the system under test/DUT to the E-DWT TEST port. Use [HEAD] to enter the fluid head correction for the difference in height between the

E-DWT TEST port and the DUT reference level if significant (see Section 3.7.8).

Fill and prime the system under test/DUT (see Section 3.5.1):

Open the test system/DUT at the highest point possible. Use the filling and priming pump to fill the test system. Close the test system/DUT when all air has been purged.

Use [AutoRange] (see Section 3.7.5) or [AutoTest] (see Section 3.1.3) to set up the

RPM4-E-DWT for the test to be run.

Set zero gauge pressure to the DUT by opening the reservoir cap vent valve, the

reservoir shut off valve and the TEST shut off valve. The RPM4-E-DWT indication may not be zero if the DUT reference height is different from the E-DWT reference height.

Set the next pressure. Close the reservoir shut off valve. Check that the TEST shut off

valve is open. Use the variable volume and fine adjustment valve to set pressure as needed (see Sections 3.5.2, 3.5.3).

When

the DUT is stable, read the reference pressure applied from the RPM4-E-DWT.

After the last pressure, return to zero by opening the reservoir shut off valve. The

RPM4-E-DWT indication may not be zero if the DUT reference height is different from the E-DWT reference height.

3.2 TEST PORT CONNECTION

A single, high pressure TEST port is provided on the top of the E-DWT. The test port connection is a DH500 F. DH500 is a gland and collar type fitting for 1/4 in. (6 mm) coned

and left hand threaded tube. DH500 is equivalent to AE F250C, HIP HF4, etc. The E-DWT-10000-AF system is delivered with two adaptors to adapt the DH500 F TEST port fitting to

1/4 in. NPT F or 1/8 in. NPT F.

USE THE CORRECT PRESSURE CONNECTORS: The E-DWT TEST port fitting is a DH500 F (see Section 1.2.1). It is NOT a 1/8 in. NPT F. Never use a fitting other than the corresponding male fitting in these connectors. Damage to the connectors and dangerous failure under pressure could result from using incorrect fittings.

DO NOT APPLY PRESSURE UNTIL YOU ARE FAMILIAR WITH OPERATION: The E-DWT-10000-AF TEST port can connect internally to both the RPM4-E-DWT’s 1 000 psi (7 MPa) and 10 000 psi (70 MPa) Q-RPTs. The LO Q-RPT SHUT OFF valve on the front of the E-DWT isolates the low pressure Q-RPT when the high pressure Q-RPT is in use. Do not apply pressure to the E-DWT until you are familiar with its operation and know how to protect the low pressure Q-RPT from overpressure (see Section 3.4). FAILURE TO PROTECT THE LOW

SURE Q-RPT FROM OVERPRESSURE MAY DESTROY IT. DAMAGE DUE TO Q-RPT OVERPRESSURE IS NOT

PR COVERED BY THE PRODUCT WARRANTY.

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

3.2.1 RPM4-E-DWT ATM PORTS

The ATM ports on the RPM4-E-DWT Q-RPT modules are connected to the RPM4-E-DWT’s internal barometer to assure that the RPM4-E-DWT gauge pressure measurements are relative to ambient pressure. These ports should always be left completely unobstructed and open to atmosphere.

NEVER plug, obstruct or connect a supply pressure to the RPM4-E-DWT Q-RPT module ATM

ports. This may adversely affect operation and AutoZeroing functions.

3.3 BATTERY/CHARGER PACK

E-DWT-10000-AF is delivered with two (2) 12 VDC battery/charger packs to supply power to the E-DWT’s reference pressure monitor.

The battery/charger pack combines a battery and battery charger.

To Charge the Battery

To charge the battery, connect the battery/charger pack to a 100 to 240 V, 50/60 Hz power supply using the supplied power cable and turn on the charger power switch. The green CHARGE indicator light goes on to indicate that battery charging is in progress. Allow 14 to 16 hours for the battery to charge fully.

When the battery charger power switch is in the ON position, the battery is connected to the charger, not the 12VDC output. When the battery charger switch is in the OFF position, the CHARGE indicator light goes off, and 12VDC battery output is supplied to the 12VDC connection.

The battery may be charged while the battery/charge pack is connected to the RPM4-E-DWT.

To preserve battery life, if run the battery down completely before recharging it and do not charge more

than 16 hours. Do not leave power connected to the battery continuously.

To Use the Battery/Charger Pack to Supply the RPM4-E-DWT

After charging the battery, connect the 12VDC connection of the battery/charger pack to the 12VDC connection on the E-DWT rear panel.

Turn the battery/charger pack power switch to OFF (when AC power is connected to the battery/charger pack, the power switch must be OFF for 12VDC power to be output).

To Check the Battery Charge Level

To check the current charge level of the battery, press the BATTERY CHECK toggle switch on the battery/charger pack front panel. Observe the BATTERY CHECK indicator lights. All three lights are lit when battery is fully charged. If no light or one light is on, the battery should be recharged.

3. OPERATION

1. Cooling fan

2. 12VDC output connector (to E-DWT)

3. IEC power connection

4. ON/OFF switch (ON – battery connected to charger; OFF - battery connected to 12 VDC output/E-DWT)

Figure 8. Battery pack/charger

5. Charge level indicator

6. Charge level check switch

7. Battery charging indicator (green – charging).

3.4 SELECTING THE HI OR LO Q-RPT

Selection of the active Q-RPT in the RPM4-E-DWT is made using the RPM4-E-DWT front panel’s [RANGE] key and E-DWT LO Q-RPT SHUT OFF valve.

When the Hi Q-RPT is active, the Lo Q-RPT must be isolated from the E-DWT’s pressure generation and control system to avoid destroying it by overpressure.

The E-DWT’s Lo Q-RPT shut off valve and visual and audible indicators, assist the operator in performing the correct operations to shut off and protect the Lo Q-RPT when the Hi Q-RPT is in use.

 OPERATION

See Figure 10 for an E-DWT schematic. Numerical references in this Section refer to Figure 9. The Lo Q-RPT is connected to or shut off from the rest of the E-DWT by the Lo Q-RPT shut off valve that

is operated using the valve knob. The proper valve position for the Q-RPT selected is prompted by the

Valve Position LEDs (7, 9). The Lo Q-RPT shut off valve (8) isolates and protects the Lo Q-RPT from the TEST port when it is

closed (knob fully CW) and opens the Lo Q-RPT to the TEST port when it is open (knob fully CCW). The Valve Position LEDs (7, 9) indicate the position in which the valve knob should be set based on the

current Q-RPT selection on the RPM4-E-DWT . If the Hi Q-R PT is selected, the LO Q-RPT SHUT O FF LED (7) is lit indicating that the valve knob should be turned fully CW to close the valve, protecting the Lo Q-RPT from high pressure. If the Lo Q-RPT is selected, the LO Q-RPT ACTIVE LED (9) is lit indicating that the valv e knob should be turned fully CCW to open the valve, connecting the Lo Q-RPT to the test pressure.

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

The E-DWT Lo Q-RPT shut off valve (8) must always be in the closed position (knob fully CW) when operating at pressure greater than 1 000 psi (7 MPa).

The CAUTION LO Q-RPT ACTIVE LED (10) is used to indicate that the Lo Q-RPT is active and provide an alert when the Lo Q-RPT is active but a Hi Q-RPT range is selected on the RPM4-E-DWT.

The CAUTION LO Q-RPT ACTIVE LED (10) is driven by the value of pressure currently measured by the Lo Q-RPT , it is not driven by the valve position as there is no sensing of the valve position.

The CAUTION LO Q-RPT ACTIVE LED (10) has three possible conditions:

• LED is OFF: The Lo Q-RPT is NOT active. The Lo Q-RPT is considered active when it measures a

pressure greater than about 100 psig (700 kPa).

• LED ON continuously: The Lo Q-RPT IS active (exposed to pressure greater than 100 psi) and the

Lo Q-RPT is selected on the RPM4-E-DWT. The LED is lit as a reminder that the Lo Q-RPT is active and pressure over its maximum working pressure of 1 000 psi (7 MPa) should n ot be applie d.

• LED is flashing ON/OFF accompanied by high frequency beeps and <!!LO Q-RPT ACTIVE!!>

displayed by RPM4-E-DWT: Lo Q-RPT IS active and the Hi Q-RPT is selected on RPM4-E-DWT. The Lo Q-RPT should NOT be exposed to pressure when the Hi Q-RPT is selected. Exposing the Lo Q-RPT to pressures for which the Hi Q-RPT is normally used, will overpressure and damage the Lo Q-RPT Vent pressure from the RPM4-E-DWT and shut off the Lo Q-RPT with the Lo Q-RPT shut off valve before continuing to use the Hi Q-RPT.

If the Hi Q-RPT is selected with the Lo Q-RPT active, RPM4-E-DWT goes into an alarm condition to avoid accidental overpressure of the Lo Q-RPT while using a Hi Q-RPT. The pressure on the Lo Q-RPT must be reduced to less than 100 psig (700 kPa) so that the CAUTION LO Q-RPT ACTIVE LED is OFF before shutting the Lo Q-RPT shut off valve and selecting the Hi Q-RPT.

The E-DWT pressure relief valve (Figure 10, Ref 7) is set to open at 150% of the RPM4-E-DWT Lo Q-RPT maximum range. When the pressure applied to the Lo Q-RPT reaches approximately 1 500 psi (10 MPa), the pressure relief valve will open exhausting oil to the reservoir and reducing pressure. Prior to opening the pressure relief valve, the RPM4-E-DWT will have gone into an overpressure condition (see Section 3.8.4.1). If an overpressure condition occurs, reduce pressure as soon as possible. The pressure relief valve will reseat automatically and close when pressure is reduced.

Do NOT overpressure the Lo Q-RPT. The Lo Q-RPT may be damaged beyond repair by pressure greater than 1 300 psi (9 MPa). Q-RPT damage from overpressure is logged in user and factory maintenance pages and is not covered by the product warranty. The E-DWT pressure relief valve should only be considered a last resort means of protecting the Lo Q-RPT. Following proper operating procedures, the Lo Q-RPT should never be over pressured.

3. OPERATION

1. TEST port (DH500F)

2. Reservoir cap vent valve

3. Primping pump

4. Reservoir cap

5. Reference pressure monitor (RPM4-E-DWT)

6. Test shut off valve and fine pressure adjustment 7 ‘Lo Q-RPT shut off’ valve position prompt LED

Figure 9. E-DWT-10000-AF front view

8. Lo Q-RPT shut off valve

9. ‘Lo Q-RPT active’ valve position prompt LED

10. ‘Lo Q-RPT active’ caution indicator

11. Reservoir shut off valve

12. Variable volume (pressure generation)

13. Variable volume piston position indicator

1. TEST port

2. System pressure rupture disc

3. Reservoir

4. Reservoir vent valve

5. Priming pump

6. Test shut off and fine adjustment valve

7. Lo Q-RPT shut off valve

8. Lo Q-RPT pressure relief valve

Figure 10. E-DWT-10000-AF hydraulic schematic

9. Reservoir shut off valve

10. Variable volume

11. Lo Q-RPT (ref pressure transducer)

12. Hi Q-RPT (ref pressure transducer)

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

3.5 PRESSURE GENERATION AND ADJUSTMENT

E-DWT-10000-AF has three means for generating and adjusting pressure, including filling and priming the test system.

The reservoir pump is used to fill and prime the test system (see Section 3.5.1). It is important to remove air from the test system b Failure to fill and prime will result in the need to use multiple variable volume strokes to generate pressure.

The variable volume is used for pressure generation and rough pressure adjustment (see Section 3.5.2).

y filling and priming it before using the variable volume to generate pressure.

The test shut off and fine adjust valve are use

3.5.1 FILLING AND PRIMING, RESERVOIR PUMP

It is important to remove air from the test system by filling and priming it before using the variable volume to generate pressure. Failure to fill and prime will result in the need to use multiple variable volume strokes to generate pressure.

The reservoir pump is designed to push oil through the E-DWT and out the TEST port into the test system. It can also be used to generate an initial pressure, saving variable volume stroke.

To fill and prime the test system, prior to generating pressure with the variable volume, proceed as follows:

See Figure 9 and Figure 10 for an E-DWT schematic and view when following this procedure.

Leave an open purge point (for example a loose fitting) at the highest point possible in

the test system that is connected to the E-DWT.

Open the reservoir shut off valve to connect to reservoir from the test system. Position the reservoir cap correctly by rotating it CW until the reservoir vent valve is at the

CLOSE position. Do not overtigthen, do not CW beyond CLOSE position. Be sure that the reservoir cap vent valve is open (loosened CCW). If not already open, open the TEST shut off valve to connect the E-DWT to the test

system.

d for fine pres

sure adjustment (see Section 3.5.3).

Pull the reservoir handle pump up slowly to fill it with oil from the reservoir. Then push

the handle down firmly with moderate speed to seal the tip of the pump against the

reservoir seat and inject oil into the E-DWT and out the TEST port. Repeat while observing the open purge point in the test system. When only oil and no

air comes out of the purge point, close and tighten the purge point. If desired, repeat to set an an intial pressure with the reservoir pump.

Be sure the variable volume is already filled and in the start position (Section 3.5.2,

- ), and the reservoir shut off valve is open.

Press down on the pump handle but do not release your downward force when the pump

gets to end of stroke or becomes to difficult to push down. While maintaining the

downward force on the pump handle, close the reservoir shut off valve to capture the

priming pressure.

Do not attempt to generate greater than 100 psi (700 kPa) using the reservoir priming

pump.

3. OPERATION

Once the system is filled and primed, use the variable volume to generate pressure to the

desired pressure set point (see Section 3.5.2).

When the reservoir cap vent valve is closed, the reservoir is not connected to atmosphere so opening the reservoir shut off valve and the test shut off valve may not fully vent the DUT. To be sure the DUT is fully vented to atmosphere, OPEN the reservoir cap shut off valve and/or disconnect at the TEST port.

3.5.2 PRESSURE GENERATION AND ROUGH ADJUSTMENT,

VARIABLE VOLUME

The variable volume can generate very high pressure very quickly. When using the variable volume, use caution not to generate pressure more quickly than desired and not to exceed the pressure rating of the E-DWT, it’s Q-RPTs or any component of the test system to which it is connected.

The variable volume is used to accomplish large pressure changes and to roughly adjust pressure at a set point. It can generate high pressure with relatively little effort.

The variable volume is not designed to fill and prime the test system. To avoid needing to refill the variable volume to reach the desired pressure, use the reservoir pump to fill and prime the test system before going to the variable volume (see Section 3.5.1).

To generate and adj

ust pressure with the variable volume proceed as follows:

See Figure 9 and Figure 10 for an E-DWT view and schematic when following this procedure.

Open the reservoir shut off valve to connect the reservoir to the variable volume.

Close the TEST shut off valve to avoid ‘pulling’ oil out of the test system in step

Rotate the variable volume CCW until the piston position indicator is at the beginning of

its stroke (indicator white).

Close the reservoir shut off valve to shut off the reservoir from the variable volume. Open the TEST shut off valve to connect the variable volume to the test system.

Check that the RPM4-E-DWT Q-RPT selection and Lo Q-RPT shut off valve setting are

correct for the pressure range.

While carefully watching the pressure indicated on the RPM4-E-DWT, rotate the variable

volume CW to increase pressure to the desired set point. Using the variable volume, it should be easy to adjust the set pressure within 100 psi (700 kPa). To adjust pressure more finely than is possible with the variable volume, use the fine adjust valve (see Section 3.5.3).

If the variable volume runs out of stroke (piston position indicator red and variable volume

will not rotate CW further) before the desired set pressure is reached, the variable volume can be isolated from the TEST port and refilled to continue generating pressure (see 8.).

To refill variable volume while the test system is under pressure proceed as follows:

Close the TEST shut off valve. Record the pressure indicated by the RPM4-E-DWT. You will need to reset this

pressure to minimize the change in test pressure when you reconnect the refilled variable volume to the test system

Slowly open the reservoir shut off valve.

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

Rotate the variable volume CCW to the beginning of its stroke (position indicator

white, variable volume will no longer rotate). Close the reservoir shut off valve. Rotate the variable volume CW to generate pressure until the pressure reaches the

value recorded in step a. Use only the variable volume to adjust the pressure. Slowly open the TEST shut off valve to reconnect the variable volume to the test

system. Proceed to continue to generate pressure as in 6.

Opening the reservoir shut off valve while the E-DWT is under pressure will very rapidly drop the pressure. Generally, it is not recommended to drop the pressure applied to pressure measuring devices very rapidly. To reduce pressure slowly, use the variable volume and only open the reservoir shut off valve to open the system to atmosphere.

To reduce pressure, rotate the variable volume CCW.

3.5.3 PRESSURE FINE ADJUSTMENT, FINE ADJUST VALVE

To adjust pressure more precisely than is possible with the variable volume, the fine adjust valve is used. When the valve is open, the displacement of its needle is used as a miniature variable volume to adjust pressure.

The test isolation and fine adjust valve is a needle valve with a stroke of several millimeters. Turn the valve handle CW to increase pressure CCW to decrease.

When using the fine adjust valve to adjust pressure, be sure not to close the valve so that the E-DWT is no longer connected to the test system. If turning the valve handle or the variable volume does not change the pressure indicated by both the RPM4-E-DWT AND the device under test, the valve is closed.

3.6 RPM4-E-DWT USER INTERFACE

The E-DWT-10000-AF’s RPM4-E-DWT A70M/A7M-AF reference pressure indicator is designed to offer the optimum balance between simple, straight forward operation and the availability of a wide variety of functions with a high level of operator discretion if desired.

The RPM4-E-DWT’s local operator interface is through the front panel’s 2 x 20 character alpha-numeric display, a function/data keypad, a cursor control pad and a Ready/Not Ready indicator. An optional [ENTER] footswitch is available. Remote communication is also available via the RS-232 (COM1) interface (see Section 4).

The E-DWT

mounts the RPM4-E

-DWT at a convenient viewing angle and includes a valve and visual indicators to isolate and protect the RPM4-E-DWT’s 1 000 psi Q-RPT (A7M) when using the 10 000 psi Q-RPT (A70M) (see Section 3.4).

3.6.1 MAIN RUN SCREEN

The RPM4-E-DWT MAIN RUN screen is its home display that is reached on power-up and from which other functions and menus are accessed. It is the very top level of all menu structures.

The MAIN RUN screen is where RPM4-E-DWT is left in normal operation. It displays the current measured pressure as well as a variety of additional information if desired.

Figure 11 and its legend summarize the RPM4-E-DWT MAIN RUN screen function

fields and their

3. OPERATION

↑

RPM4-E-DWT has a screen saver function which causes the display to dim if no key is pressed for 10 minutes. Pressing a key restores full power to the display. The screen saver time can be changed or screen saving can be completely suppressed (see Section 3.9.5.1).

PRESSURE1UNITM hzRR DDISPLAYFUNCIONnn/nn

DISPLAY FIELD NAME PURPOSE CONTENTS SECTION

1. PRESSURE1 Measured

2. UNIT Unit of

3. M Measurement

4. h Head

5. z AutoZero

6. RR Active

7. nn/nn Sequence

8. DISPLAY FUNCION

9. D Pressure

pressure

measure

mode

pressure indicator

indicator

Q-RPT position indicator

progress indicator

Information specific to the DISPLAY mode

information indicator

Displays pressure measured by the active Q-RPT

Identifies unit of measure in which pressure values are displayed

Not used in the E-DWT-AF RPM4-E-DWT. RPM4-E-DWT supports gauge mode only.

Indicates whether a fluid head correction is applied to PRESSURE1

Indicates whether the AutoZero function is ON or OFF for the active Q-RPT and measurement mode

Indicates the position of the active Q-RPT in the RPM4-E-DWT

Indicates progress of AutoTest sequence, during test execution

Pressure indication depending on current RPM4-E-DWT DISPLAY function. Leading character identifies the value

Pressure information indicator depending on current RPM4-E-DWT DISPLAY function.

Numerical pressure value and sign. 1.2.3

Pressure unit abbreviation 3.7.3

<g > for gauge mode

<h> the fluid head is not zero <blank> fluid head is zero

<z> AutoZ is ON <blank> AutoZ is OFF

<Hi> Hi Q-RPT <Lo> Lo Q-RPT

<NN/NN> Number of this point

Numerical pressure value

and sign. <PPC EXT DEV:> when the RPM4E-DWT is initialized as an external device to a PPC pressure controller.

<σ> Display mode is AVERAGE <R> Display mode is RATE and

<H> Display mode is HI/LO and <D> Display mode is DEVIATION

<,

<F> Display mode is FREEZE and Blank, no character Current

over total number of points in the sequence

and value is standard deviation value is pressure rate of

change per second value is high, then low and value is difference from

current target

,↓ > Display mode is Q-

RPT and value is measurement of inactive QRPT

value is last captured reading display mode is CLEAN

None

3.7.8

3.9.1

3.1.1

3.1.3,

3.7.7

Figure 11. MAIN RUN screen display fields

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

3.6.2 FUNCTION / DATA KEYPAD LAYOUT AND PROTOCOL

The RPM4-E-DWT has a function/data keypad for local operator access to direct functions, function menus and for data entry.

1. The Function/Data keys allow very commonly used functions to be accessed directly by a single keystroke when pressed from the MAIN RUN screen (see Section 3.6.1). The name of the function is on the bottom half of keys enter numerical values when editing.

2. The Editing and Execution keys are for starting and suspending command execution, curso r con trol in menus and editing entries.

the key

. These

Figure 12. Keypad layout

3. The Menu/Data keys provide access to function menus when pressed from the MAIN RUN screen. The menu name is on the bottom half of the key. The SETUP menu is for more frequently used functions (see Section 3.8). The SPECIAL menu is for

functions tha day to day operation (see Section 3. 9 ) . T hese keys enter

numerical values when editing.

t are not generally used as a part of

Pressing [ENT] generally causes execution or forward movement in the menu tree.

Pressing [ESC] moves back in the menu tree and/or causes execution to cease or suspend. Pressing [ESC] repeatedly eventually returns to the MAIN RUN screen and, from there, allows momentary viewing of the RPM4-E-DWT introduction screen.

Pressing the [+/-] key changes a numerical sign when editing. It also toggles through multiple screens when available and, from some run screens, is a shortcut to a momentary display of active RANGE.

Pressing the [

], [ ], [ ] and [ ] keys allows up, down, reverse and

forward cursor movement when editing data entry or moving in menus.

Some screens go beyond the two lines provided by the display. This is indicated by a flashing arrow in the second line of the display. Press the cursor control keys to move the cursor to access the lines that are not visible or directly enter the number of the hidden menu choice if you know it.

3.6.3 OPTIONAL REMOTE [ENT] (ENTER) FOOTSWITCH

Operating the footswitch is the equivalent of pressing [ENT] on the front panel. The remote ENTER feature can be particularly convenient when running AutoTests (see

Section 3.1.3) in which the operator’s hands are not free or attention is on the device under test rather than the RPM4

-E-DWT.

3. OPERATION

3.6.4 SOUNDS

RPM4-E-DWT is equipped with a variable frequency tone device to provide audible feedback and alarms. The beeper is used for the following indications.

Valid key press

Brief beep. Choice between three frequencies or NO sound is available (see Section 3.9.5.2).

lid key press

Inva Change E-DWT Lo Q-RPT

Descending two tone “blurp” Four one second beeps (see Section 3.4).

shut-off valve setting Leak ch

eck complete Upper limit exceeded Pmax! (overpressu

re limit)

Three two second beeps (see Section 3.7.6). Intermittent one se

cond beeps (see Section 3.8.4).

Eight second high frequency beep (see Section 3.8.4.1).

exceeded AutoTes

t in/out of tolera

nce

Ascending triad/descending triad ( see Section 3.7.11).

reading Hi Q-RPT is selected but Lo

Q-RPT is being pressurized

Intermittent two alarm is combined with flashing of the red, Lo Q-RPT

second high frequency beep. The audible

Active LED on the E-DWT (see Section 3.4, 3.7.2).

AutoTest in/

out of tolerance

Ascending triad/descending triad ( see Section 3.7.11).

reading

3.7 RPM4-E-DWT DIRECT FUNCTION KEYS

3.7.1 SUMMARY

Table 3 provides a brief summary of RPM4-E-DWT direct function key operation. It may be useful to keep a copy of this summary near the E-DWT, especially when first becoming acquainted with its operation.

Local operation of RPM4-E-DWT is through the front panel keypad. To minimize multilayered menu structures, the keypad numerical keys also provide direct access to the most commonly used functions. The function accessed is labeled on the bottom half of the key. Direct function keys are active whenever RPM4-E-DWT is in its MAIN RUN screen. Table 3

ariz

summ

es the operation of the direct function keys.

Table 3. Summary of RPM4-E-DWT function key operation

DIRECT FUNCTION KEYS ARE ACTIVE FROM THE MAIN RUN SCREEN

See corresponding manual sections for full detail.

Adjust height of fluid head correction. Set to zero to defeat correction.

Feature not used in RPM4-E-DWT.

Run the AutoZ function to AutoZero the active Q-RPT.

Set up and optimize RPM4-E-DWT features for a specific operating range.

View active range and toggle through available ranges. [ENT] on a range activates it.

Select pressure unit of measure for the active range. Choice of units available in this menu can be customized.

Not used. E-DWT-AF RPM4-E-DWT is gauge mode only.

Menu of less commonly used internal functions and settings.

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

Run automated leak checking routine.

Menu of commonly used setup features i ncl ud in g save/delete AutoRange ranges, set display resolution, set stability limit, set upper/lower limit, view AutoTest data

Select the display function for the bottom line of the RPM4-E-DWT display.

Start or set functions such as Leak Check, AutoTest and Freeze. ENTER values when editing.

3.7.2 [RANGE]

 PURPOSE

To view and/or change the active pressure measurement range and associated settings.

 PRINCIPLE

An RPM4-E-DWT range is defined as a pressure span and associated settings (see Section

3.1.1). The

RPM4-E span. The default ranges of the RPM4-E-DWT A70M/A7M-AF are 10 000 psi (A70M) and 1 000 psi (A7M). Additional ranges, lower than the Q-RPT’s maximum span, may be created at any time using AutoRange (see Section 3.7.5) or AutoTest (see Section 3.1.3). Ranges created u Section 3.8.1).

The [R and selected.

 OPERATION

Pressing the [RANGE] function key activates the range viewing and selecting function. When the [RANGE] function key is first pressed, the active range is displayed. For example:

1. Q-RPT designator.

2. Type of range. DF for the Q-RPT’s default range; AR for a range created by AutoRange.

3. Q-RPT position designator.

4. Current pressure unit of measure.

5. Full scale pressure in current unit of measure .

Pressing the [RANGE] key again while in the RANGE functions toggles through displays of the other available ranges, from lowest range to highest range.

-DWT has two Q-RPTs. Each Q-RPT has a default range which is its maximum

sing AutoRange or AutoTest may be saved, with their settings, for reactivation (see

ANGE] functio

n key allows the available RPM4-E-DWT pressure ranges to be viewed

Active A7M DF Lo psi 1000g

To select a range to become the active range, press [ENT] while the range is displayed. Any time a range change causes the active Q-RPT to change, the E-DWT Lo Q-RPT shut off

valve must be operated to connect or disconnect the Lo Q-RPT from the TEST port. The green Lo Q-RPT valve position LEDs indicate the correct position of the Lo Q-RPT shut off valve knob based on the Q-RPT currently in use (see Section 3.4).

Press

ing [ES

C] while in the RANGE function returns to the MAIN RUN screen without

making a range change.

The E-DWT Lo Q-RPT shut off valve protects the Lo QRPT (1 000 psi max) from overpressure when the Hi Q-RPT is in use. Familiarize yourself with E-DWT operation (see Section 3.4) before changing ranges and applying pressures. Always turn the Lo Q-RPT shut off valve fully in the direction of the lighted green LED before applying pressure.

3. OPERATION

Range full scale limits are given in the pressure unit that is currently active for that range.

Pressing [+/-] from the MAIN RUN screen provides a shortcut to a momentary view of the active range.

Many RPM4-E-DWT settings and functions are range specific. See Table 2 for identification of range specific settings.

For best metrological performance, vent the RPM4-E-DWT Q-RPT before changing ranges.

3.7.3 [UNIT]

 PURPOSE

To select the unit of measure in which RPM4-E-DWT displays pressure values.

 PRINCIPLE

RPM4-E-DWT allows the unit of measure in which pressure values are displayed to be changed.

RPM4-E-DWT A70M/A7M-AF supports 13 standard pressure units of measure as well as user defined units. To simplify operation, quick access to up to six units is made available under the [UNIT] key. The [UNIT] key contents can be customized by the user to any configuration of six units (see Section 3.9.6).

Internally, RPM4-E-DWT always operates in Pascal (Pa), the SI unit of pressure. Values of pressure are represented in other units by the application of conversion factors to convert from Pa (see Section 7.1.1).

 OPERATION See Figure 9 and Figure 10 for an E-DWT view and schematic when following this procedure.

To change the active pressure unit of measure for

a range, press [UNIT] from the MAIN RUN screen while the range is active. The display is:

1psi 2MPa 3kPa 4bar

The cursor is on the number corresponding to the active pressure unit of measure for the

active range.

To change the pressure unit of measure, select the desired unit. Making the selection

returns to the MAIN RUN screen with the selected unit active.

The pressure unit of measure selected is range specific. When in a given range, all functions and settings are represented in the current measurement unit for that range. However, certain internal and/or metrological functions (e.g., Q-RPT calibration coefficients) are always represented in Pa regardless of the current range unit.

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

See Section 7.1.1 for tables of the conversion factors used by RPM4-E-DWT.

If the pressure unit selected is inWa (inches of water), the reference temperature for water density must be specified in a separate menu (choices are 4ºC, 20ºC 60ºF). No reference temperature selection is necessary for the unit mmWa as the only reference temperature commonly used for mmWa is 4 ºC.

The choice of up to six units available under the UNIT function can be customized from a wider selection by the user (see Section 3.9.6). The units available under the UNIT function can be reset to default by reset (see Section 3.9.9.2).

3.7.4 [MODE]

 PURPOSE

Not used in E-DWT-10000-AF’s RPM4-E-DWT A70M/A7M-AF. Measurement mode is always gauge (difference from atmospheric pressure).

3.7.5 [AUTORANGE]

 PURPOSE

To automatically set up the RPM4-E-DWT to optimize its measurement characteristics and features for a specific, user defined pressure range of operation.

 PRINCIPLE

RPM4-E-DWT A70M/A7M-AF is designed to support the calibration and test of a very wide variety of test ranges.

The AutoRange function simplifies the task of selecting the Q-RPT best suited to cover a specific test range and setting measurement parameters appropriately for that specific range. The s e a r e set automatically based on operator entry of desired measurement mode, pressure unit of measure and range full scale. The selections and settings made by AutoRange are summarized in Table 4.

A range set using [SETUP], <1range> (see Section 3.8.1). Saved ranges are available for later selection using [RANGE]

rwritten by the next AutoRange or erased when another range is selected.

ove

Press [ENT] from the main run screen in Rate DISPLAY mode to use the [AutoTest] function to AutoRange the RPM4-E-DWT based on DUT tolerance (see Section 3.7.11).

up using AutoRange and all its range specific settings, may be saved for recall

(see Section 3.7.2). If a range created by AutoRange is not saved, it is

3. OPERATION

Table 4. Settings made by AutoRange

SETTING/SELECTION PURPOSE SET TO SECTION

Unit Set pressure unit of measure Operator specified during

Full scale Establish span maximum Operator specified during

AutoRange span Basis of span based setting

calculations

Q-RPT Select most appropriate Q-RPT

to cover range and mode.

Upper limit Set maximum and minimum

pressure alarm limits.

Resolution Set display resolution 0.01% of AutoRange span or

Stability Limit Set Ready/Not Ready stability

criterion.

AutoRange

AutoRange Zero gauge to AutoRange full

scale Q-RPT with lowest span whose

full scale is greater than AutoRange full scale

105 % of operator entered full scale pressure

1 ppm of default Q-RPT span, whichever is larger.

0.01% AutoRange span or 5 ppm of default Q-RPT span, whichever is larger.

3.7.3

None

1.2.3.1

3.8.4

3.8.2

3.8.3,

3.7.5

 OPERATION To use the AutoRange function, press [AutoRange] and respond to the RPM4-E-DWT’s

prompts.

Select pressure unit of measure: The screen is identical in appearance and function

to the [UNIT] screen (see Section 3.7.3).

Enter the AutoRange full scale pressure: Enter the full scale pressure value in the

<------> entry field and press [ENT]. If the full scale value entered cannot be covered by

RPM4-E-DWT, an error message appears.

View proposed AutoRange range: The proposed AutoRange range screen is:

1. Indication that this is a screen of the proposed AutoRange range.

2. Designator and position of the Q-RPT that AutoRange has selected to cover the AutoRange full scale and measurement mode.

3. Pressure unit of measure specified in AutoRange.

4. AutoRange full scale pressure.

AutoRange A70M Hi psi 5000g

If AutoRange selects a Q-RPT but you would like to use the other one, the cursor control

keys may be used to toggle between Q-RPTs so that the other can be selected.

Accept proposed AutoRange: To accept the proposed AutoRange and go to the MAIN

RUN screen with the new AutoRange range active, press [ENT] or [AutoRange]. To modify the AutoRange full scale or pressure unit of measure, use [ESC] to back through the AutoRange screens and make changes.

The E-DWT Lo Q-RPT Shut off valve protects the Lo Q-RPT (1 000 psi max) from

overpressure when the Hi Q-RPT is in use. Familiarize yourself with E-DWT operation (see Section

3.4) before changing ranges and applying pressures. Always turn the Lo Q-RPT Shut off valve fully in the di

rection of the lighted green LED before applying pressure.

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

To verify or confirm the range from the MAIN RUN screen, use [+/-] or [RANGE] to view the

active range (see Section 3.7.2).

See Table 4 for a listing of all selections and settings affected by AutoRange and their values.

3.7.6 [LEAK CK]

 PURPOSE

To run an automated leak check routine that determines the leak rate of the system connected to the E-DWT TEST port.

 PRINCIPLE

The LEAK CHECK function is provided as a means of checking and quantifying the leaks that may be present in the system connected to the E-DWT TEST port.

The principle of the LEAK CHECK function is the measurement of the natural decrease or increase of pressure in a fixed volume over time. The LEAK CHECK function allows a leak check time to be set. The total pressure change and the average rate of change over the leak check time are calculated and displayed.

 OPERATION

To run a leak check, first set the pressure to the desired leak check pressure.

Changing the pressure in a test system causes adiabatic temperature changes in the pressurized medium that need to have dissipated before a valid leak measurement can be made. In general, a 0.5 to 1 minute wait before running a leak check is adequate to allow the adiabatic temperature change to dissipate and valid leak measurements to be made. However, stabilization time may be much longer for large pressure changes and as volume and pressure increase.

To access the LEAK CHECK function, press [LEAK CHECK] from the MAIN RUN screen. Select <1run> to run a leak test. The display is:

Set leak check time:

1. Edit field for the time over which the leak rate will be determined, in seconds.

15 s

Edit the leak check time if desired (minimum 1, maximum 999 seconds) and press [ENT]. Press [ENT] again when ready to start the leak test. The leak test display is:

1. Standard MAIN RUN screen first line showing measured pressure.

2. Active Q-RPT position indicator

3. Indication that leak test is running and countdown of time remaining.

5657 psi g Hi Leak testing 13 s

3. OPERATION

[ESC] can be used to abort the running leak test. [ENT] while the leak test is running restarts

the leak check timer. When the leak check timer countdown has completed, RPM4-E-DWT beeps three times and the leak check results screen is displayed:

1. Total pressure change from start to finish of leak check time.

2. Indicator of Q-RPT used to run the leak check.

3. Average rate of change of pressure over the leak check time period (∆P/time in seconds).

∆P 0.61 kPa a Hi Rate 0.06 kPa/sec

From the leak check results screen, press [ENT] to repeat the leak test. Press [ESC] to return to leak check main menu and exit to the MAIN RUN screen.

To view the results of the most recently completed leak check, press <2view>. If NO leak check data is stored (i.e., if the RPM4-E-DWT has never run a leak test or a reset has cleared previous leak test results), the results screen displays <Data NOT available> briefly and returns to MAIN RUN screen. Press [ENT] or [ESC] to return to the MAIN RUN screen.

Leak check is range specific in the sense that a leak check is run using the active range. However, only one set of leak check results is maintained in memory and each leak test completed overwrites the memory. View leak check always shows the results of the last leak check run regardless of the range that is now active. The results screen includes the range indicator to indicate the range in which the leak check was run.

3.7.7 [DISPLAY]

 PURPOSE

To select, from a variety of choices, the information that is displayed on the second line of the RPM4-E-DWT display.

 PRINCIPLE

RPM4-E-DWT supports a variety of advanced pressure measurement functions that are displayed on the second (bottom) line of the RPM4-E-DWT display. In summary, the available display functions included are:

AVERAGE Calculates the average measured pressure over a user specified period of time

and displays the average, the standard deviation about the mean and a countdown in seconds to the next average (see Section 3.7.7.1) . This function is o

used to filter out pressure noise in an unstable s ys tem . The magnitude of the

ften noise is quantified by the standard deviation about the mean. A second Avg screen allows the instantaneous pressure values to be viewed during an averaging cycle.

RATE Calculates and displays the current rate of change of pressure in current

pressure units/second (see Section 3.7.7.2). This function is a useful indication

stability of the pressure

of the

being measured. It is often used as an indication of positive or negative leak rate and as a go/no go criterion of when to take data when comparing RPM4-E-DWT and a device under test, for example in a calibration. Rate is used by the Ready/Not Ready function to determine when a Ready condition exists (see Section 3.1.2).

DEVIATION Contin

uously cal

culates and displays the difference between the pressure

me asure d by RPM4-E-DWT and a target pressure entered by the user (see Section

3.7.7.3). This function is useful in monitoring the evolution of pressure around and/or away from a de

sired set point.

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

RPT Allows pressure measurement from the RPM4-E-DWT’s two Q-RPTs to be

displayed simultaneously (see Section 3.7.7.4).

HI/LO Records a

nd displays maximum and minimum pressures measured (see Section 3.7.7.5). This function is used to keep track of the minimum and maximum pre

ssure observed in a system over a period of time or to monitor if

a pressure min/max limit has been exceeded.

FREEZE Captures and displays the pressure measured by the active range of

RPM4-E-DWT when the [ENT] key is pressed (see Section 3.7.7.6). This function is us

eful to record the pressure present at the time of an operator observed trigger event, for example when the needle of an analog gauge is on the nominal point or when a switch activates.

CLEAN Blanks out the second line of the display (see Section 3.7.7.7). This function is

used when

a simple display of pressure measured by the RPM4-E-DWT active

range with minimal additional information is desired.

 OPERATION

To set the DISPLAY function press [DISPLAY] from the main run screen.

The display is:

1Avg 2Rate 3Dev 4RPT 5Hi/Lo 6Freez 7Cln

The cursor is on the active DISPLAY function. Selecting a DISPLAY function returns to the main run screen with the selected function active. See Sections 3.7.7.1 to 3.7.7.7 for

n on

informatio

each of the DISPLAY choices.

The DISPLAY selection is NOT range specific. A DISPLAY selection made in one range

applies to all ranges.

The default DISPLAY function is Rate which causes the second line of the display to show “R”

followed by the current rate of change of pressure in current pressure units per second.

3.7.7.1 AVG (AVERAGE)

 PURPOSE

To activate the Average DISPLAY and/or adjust the period of time over which averaging occurs.

See Section 3.7.7.  Principle.

 OPERATION

To access the Average DISPLAY, press [DISPLAY], <1Avg>. The display is:

1. Edit field for averaging period in seconds. Default is 20. Minimum 1, maximum 999.

Averaging Period: 20 s

Edit the averaging time period if desired. Press [ENT] to return to the main run screen with the Average DISPLAY active.

3. OPERATION

With the Average DISPLAY active the main run screen is:

1. Average measured over last completed averaging period.

2. Standard deviation of last completed averaging period.

3. Countdown in seconds until completion of ongoing averaging period.

2007 psi g Hi δ 0.2 18Avg

The Average DISPLAY has a second screen that allows the instantaneous pressure readings to be viewed while an averaging cycle is running. The instantaneous Average screen is:

1. Instantaneous pressure values at RPM4-EDWT’s normal update rate.

2. Current rate of change of pressure in pressure units/second.

3. Countdown in seconds until completion of ongoing averaging period.

2006 psi g Hi R 0.1/s 18Avg

The [+/-] key toggles between the main run Average screen and the instantaneous values Average screen.

Pressing [ENT] while in the Average DISPLAY aborts the current averaging period and causes a new one to begin. [ENT] can thus be use to trigger a new averaging period on demand.

In the Average DISPLAY the Ready/Not Ready indication applies to the result of the previous averaging period (see Section 3.1.2). Ready indicates that all readings during the previous averaging period met the stability criterion. Not Ready indicates that one or more readings were outside of the stability criterion.

Changing the pressure unit of measure, measurement mode or range while the averaging screen is active, starts a new averaging period.

To go to a DISPLAY other than Average, press [DISPLAY] and make a new DISPLAY choice (see Section 3.7.7).

3.7.7.2 Rate

 PURPOSE

To activate the Rate DISPLAY.

See Section 3.7.7,  Principle.

The Rate run screen accesses the AutoTest function (see Section 3.7.11) to AutoRange RPM4-E-DWT based on DUT characteristics. To access AutoTest, press [ENT] from the Rate run screen.

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

 OPERATION

To activate the Rate DISPLAY press [DISPLAY], <2Rate>. Pressing <2Rate> returns to the main run screen with the Rate DISPLAY active.

With the Rate DISPLAY active the main run screen is:

1. Current rate of change of pressure in current pressure unit per second.

The Rate DISPLAY is different and separate from the stability setting which is used to set the stability criterion on which the Ready/Not Ready indication is based (see Sections 3.8.3 and 3.1.2). The Rate DISPLAY only causes the current rate of change to be Ready condit

displayed and has NO affect on the stability setting or the Ready/Not

ion.

The Rate DISPLAY is the default RPM4-E-DWT main run screen display.

8455 psi g Hi R 0.1/sec

To go to a DISPLAY other than Rate, press [DISPLAY] and make a new DISPLAY choice (see Section 3.7.7).

3.7.7.3 Dev (Deviation)

 PURPOSE

To activate the Deviation DISPLAY and/or set the deviation target value.

See Section 3.7.7,  Principle.

 OPERATION

To activate the Deviation DISPLAY press [DISPLAY], <3Dev>. The display is:

Target: 9000 psi g

Edit the desired target value. Pressing [ENT] returns to the main run screen with the Deviation DISPLAY active using the entered target value.

The target value is the value from which deviations (D) are measured by the Deviation DISPLAY following:

D = current pressure - target pressure

With the Deviation DISPLAY active the main run screen is:

1. Deviation of current pressure from the target value.

2. Target value.

8998 psi a zH3 D -2 T9000.0

3. OPERATION

Pressing [ENT] from the main run screen when the Deviation DISPLAY is active goes directly to the Target editing screen. This allows the target value to be changed and without going through the DISPLAY menu.

If the pressure measurement unit or mode is changed while the Deviation DISPLAY is active the target value remains at the same numerical value. It is NOT converted.

To go to a DISPLAY other than Deviation, press [DISPLAY] and make a new DISPLAY choice (see Section 3.7.7).

3.7.7.4 RPT

 PURPOSE

See Section 3.7.7,  Principle.

To activate the Q-RPT DISPLAY.

 OPERATION

For the sake of clarity, when describing the Q-RPT DISPLAY, the Q-RPT displayed on the top line of the display when the Q-RPT function is selected is referred to as the “active” Q-RPT. The other Q-RPT to be displayed on the second (bottom) line of the RPM4-E-DWT display is referred to as the “inactive” Q-RPT. It is “inactive” in the sense that all Q-RPT specific functions and settings such as UNIT still apply to the “active” Q-RPT. To make changes to the “inactive” Q-RPT, for example to change its pressure measurement unit, it must be made the active Q-RPT by a range change (see Section 3.7.2).

To activate the Q-RPT DISPLAY, press [DISPLAY], <4RPT>. Operation returns to the MAIN RUN screen with the inactive Q-RPT displayed on the display’s bottom line. The range of the inactive Q-RPT is always the default range, not an AutoRanged range (see Section 3.1.1).

With the Q-RPT DISPLAY

active the main run scree

n is:

1. Active RPT display.

2. Inactive RPT display with Ready/Not Ready indicator on far left.

When the Q-RPT display is active, executing a range change to a range on the inactive Q-RPT makes the inactive Q-RPT the active Q-RPT. The DISPLAY defaults back to Rate ( Section 3.7.7.2).

9911 psi g zHi *0.7 psi g zLo

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

To go to a DISPLAY other than Q-RPT , press [DISPLAY] and make a new DISPLAY choice (see Section 3.7.7).

3.7.7.5 Hi/Lo

 PURPOSE

See Section 3.7.7,  Principle.

To activate the Hi/Lo DISPLAY.

 OPERATION

To activate the Hi/Lo DISPLAY press [DISPLAY], <5Hi/Lo>. Pressing <5Hi/Lo> resets the Hi/Lo values and returns to the main run screen with the Hi/Lo DISPLAY active.

With the Hi/Lo DISPLAY active the main run screen is:

9911 psi g zHi

1. Highest pressure observed since Hi/Lo reset.

2. Lowest pressure observed since Hi/Lo reset.

H 9922 L9800

The Hi/Lo values change each time a new Hi or Lo pressure is measured.

The Hi/Lo record can be reset at any time by pressing [ENT]. This allows a Hi/Lo reset without going back through the DISPLAY menu.

If the pressure measurement unit, mode or range is changed while the Hi/Lo DISPLAY is active, Hi/Lo resets.

To go to a DISPLAY other than Hi/Lo, press [DISPLAY] and make a new DISPLAY choice (see Section 3.7.7).

3.7.7.6 Freeze

 PURPOSE

To activate the Freeze DISPLAY.

See Section 3.7.7,  Principle.

3. OPERATION

 OPERATION To activate the Freeze DISPLAY press [DISPLAY], <6Freeze>. Pressing

<6Freeze> returns to the main run screen with the Freeze DISPLAY active.

With the Freeze DISPLAY active the main run screen is:

1. Pressure measured by active range of RPM4-E-DWT when [ENT] was pressed (displays 0.00 by default when Freeze DISPLAY is first activated).

9913 psi g zHi F 9912

Pressing [ENT] causes the current pressure measured by the active RPM4-E-DWT Q-RPT to be captured and displayed.

If the pressure measurement unit, mode or range is changed while the Freeze

DISPLAY is active, the Freeze value defaults back to zero.

To go to a DISPLAY other than Freeze, press [DISPLAY] and make a new

DISPLAY choice (see Section 3.7.7).

3.7.7.7 Clean

 PURPOSE

To activate the Clean DISPLAY.

See Section 3.7.7,  Principle..

 OPERATION

To activate the Clean DISPLAY press [DISPLAY], <7Cln>. Pressing <7Cln> returns to the main run screen with the Clean DISPLAY active.

With the Clean DISPLAY active the main run screen is:

1. Conventional main run screen first line.

2. “Clean” second line.

9913 psi g zHi

To go to a DISPLAY other than Clean, press [DISPLAY] and make a new

DISPLAY choice (see Section 3.7.7).

3.7.8 [HEAD]

 PURPOSE

To cause a pressure fluid head correction to be added to or subtracted from the pressure measured by the RPM4-E-DWT Q-RPT in order to predict the pressure at a height other than the E-DWT’s reference level.

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

 PRINCIPLE

The RPM4-E-DWT measures gauge pressure at the height of the E-DWT’s top surface TEST port. Frequently, when performing a calibration or test, the device or system under test is at a different height than the E-DWT’s TEST port. This difference in height, frequently called head, can cause a significant difference between the pressure measured by the E-DWT at its TEST port height and the pressure actually applied to the device under test at a different height. When that is the case, it is useful to make a head correction to the pressure measured by the RPM4-E-DWT in order to predict the pressure actually applied at a different height.

RPM4-E-DWT can accurately determine “head” pressures for liquids (oil, water) as the pressurized medium. In calculating the head value, standard gravity (9.80665 m/s

) is used.

A custom liquid density may also be specified. The [HEAD] function key is used to specify the height difference between the E-DWT TEST

port and another height. Entering a height of zero turns the function off. The height units and the test medium can be changed using [SPECIAL], <3Head> (see Section 3.9.3).

An oil head has a pressure value of about 0.04 psi/inch (0.1 kPa/cm). As a general rule with RPM4-E-DWT A70M/A7M-AF, use of the HEAD function to assure in tolerance measurements is necessary only when the head exceeds 28 in. (70 cm) at 10 000 psi (70 MPa) or 0.28 in (0.7 cm) at 100 psi, and proportional to these values in between.

 OPERATION

For the head function to be used as described here, the RPM4-E-DWT must be AutoZeroed to the TEST port reference level following the AutoZeroing instructions in Section 3.7.10.

To access the HEAD function, press [HEAD]. The display is:

Edit head height:

1. Test fluid currently specified for the head correction.

2. Edit field for head height.

+ 14 in oil

Edit the head height to the desired value. Press [ENT] to return to the MAIN RUN screen with the new head correction active. Press [ESC] to return with no changes.

For the head function to be used as described here, the RPM4-E-DWT must be AutoZeroed to the TEST port reference level following the AutoZeroing instructions in Section 3.7.10.

ference height of

The re pressure measurement is the E-DWT TEST port weep hole. The head height should be entered as a positive value if the device or system under test is higher than the reference level and negative if it is lower.

the RPM4-E-DWT

3. OPERATION

The HEAD function is NOT range specific. The HEAD ON or OFF status remains the same as Q-RPTs and ranges are changed. Edits made to the head settings are independent of active range or Q-RPT.

When a head correction is being applied, it is indicated by <h> in the fourth character from the right in the top line of the MAIN RUN screen (see Section 3.6.1). When the head correction is zero, the <h> is not shown.

The default head height unit is inches and the fluid oil. To change units of head height between inches and centimeters and to change the test fluid species, use [SPECIAL], <3head> (see Section 3.9.3).

3.7.9 [SDS]

 PURPOSE

The SDS function is not used in RPM4-E-DWT A70M/A7M-AF.

3.7.10 [AUTOZ]

 PURPOSE

To run the AutoZ function that zeros the active Q-RPT.

 PRINCIPLE

See Section 3.9.1,  Principle, for a full explanation

of the AutoZ function

The RPM4-E-DWT should be zeroed prior to running a calibration or test with the E-DWT.

 OPERATION

For the AutoZ function key to run AutoZ, AutoZ must be turned ON for the active range and measurement mode. AutoZ ON is indicated by <z> to the left of the Q-RPT designator on the first line of the main run screen. AutoZ ON and OFF is set using [SPECIAL], <1AutoZ> (see Section

3.9.1). If AutoZ is OFF for the active Q-RPT, and measurement m

ode, <AutoZ is off> is displayed

when [AutoZ] is pressed.

To properly zero the RPM4-E-DWT prior to running a calibration or test, proceed as follows:

Close the reservoir shut off valve.

Open the TEST shut off valve. Open the test system (disconnect) at the E-DWT TEST port.

Be sure that the E-DWT is filled with oil up to the TEST port weep hole. Use the variable

volume to raise the oil level if necessary.

Press [AutoZ] from the RPM4-E-DWT main run screen. <Running gauge AutoZ> is

displayed briefly before returning to the main run screen.

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

Before running AutoZ in gauge mode, ensure that the pressure applied to the Q-RPT is truly zero gauge (atmospheric pressure). If running AutoZ in gauge mode results in a zero offset that RPM4-E-DWT considers unusually large, <Confirm 0 gauge P!> is displayed. Check that zero gauge pressure is applied to the E-DWT TEST port, the reservoir shut off valve is closed and the TEST shut off valve is open.

Allow the RPM4-E-DWT to stabilize at atmospheric pressure for 2 to 3 minutes before running AutoZ in gauge mode.

3.7.11 [ENT] (RUN AUTOTEST)

 PURPOSE

To run the AutoTest function which automatically runs a calibration test sequence (Quick Test or File Test).

Run AutoTest is accessed by pressing [ENT] from the Rate or Clean DISPLAY mode (see Section 3.7.7). In other DISPLAY modes, the function of [ENT] is specific to the mode.

 PRINCIPLE RPM4-E-DWT supports AutoTest automated sequences to assist in the testing or calibration

of analog gauges and other pressure sensitive devices. The AutoTest function is intended to:

• AutoRange the RPM4-E-DWT (see Section 3.7.5) to the range of the DUT being tested

with setting

s approp

riate for the tolerance of the DUT.

• Step the operator through a planned sequence of test pressure increments if desired.

• Alert the operator to possible out of tolerance conditions at each test point.

• Log test data in RPM4-E-DWT that can be viewed following the test.

There are two types of AutoTest: Quick AutoTest and File AutoTest.

• Quick AutoTest: The DUT and test parameters are entered “on the fly” during the

initialization of the test, then the test is executed if desired. In Quick AutoTest tests, the test points are defined in % of test FS pressure.

• File AutoTest: The DUT and test parameters are stored in a file (see Section 3.8.5.2) and

retrieve

d when a

DUT is to be tested. In File AutoTests, test points are defined

individually.

AutoTest operation is oriented towards running tests in which the pressure is set to the DUT cardinal point indication and then the actual reference pressure present is read from the RPM4-E-DWT.

AutoTest Settings and Calculations

The data required to initialize an AutoTest is either entered “on the fly” (Quick AutoTest) or retrieved from a file (File AutoTest). The data items required are:

• Pressure unit of measure.

• DUT full scale in pressure unit of measure.

• DUT tolerance in ± % FS (full scale).

3. OPERATION

• Test increment in % FS (Quick AutoTest) or number of test increments and the value of each

increment in the pressure unit of measure (File AutoTest).

• Test point sequence: ascending, descending or both (Quick AutoTest only). The initialization data is used to AutoRange the RPM4-E-DWT appropriately for the DUT and test

to be run. At the end of the AutoTest initialization, the RPM4-E-DWT is AutoRanged as follows (see Section 3.7.5, Table 4):

• RP

T: The Lo Q-RPT is active if the maximum pressure in the AutoT est is equal to or less than 1 000 psi (7 MPa), th e Hi Q-RPT is active if the maximum pressure in the AutoTest is greater than 1 000 psi (7 MPa).

• Pressure unit of measure: As specified in the AutoTest initialization.

• Displa y resolution: The DUT tolerance divided by 10 and rounded to the nearest digit, or 1

ppm of Q-RPT span, whic hever i s great er.

• Stability test for Ready/Not Ready indication (see Section 3.1.2): The DUT tolerance divided by

, or 2 ppm of Q-RPT span, whichever is greater.

• Upper limit (UL): The DUT full scale plus 5 %, or the Q-RPT’s maximum UL, whichever is less (see Section 3.8.4).

toRange the RPM4-E-DWT based on DUT characteristics but not execute an AutoTest, the

To Au AutoTest can be aborted just after the initialization. Then the RPM4-E-DWT is set up appropriately for the DUT to be te sted b ut the Aut oTest in crement s don’t exec ute.

See OPERATION in this Section for information on running a Quick or File AutoTest. See Section 3.8.5.2 for informatio n on sett ing up Fil e AutoTe st files. See S

AutoTes

on 3.8.5.1 for information on viewing the data files that result from running a File

ecti

 OPERATION

an Au

To run or Clean run screen (DISPLAY modes that do not use [ENT] (see Section 3.7.7)). The display is:

toTest, press [ENT] from the Rate, RPT

Run AutoTest: 1Quick 2File

Select <1Quick> to run a Quick AutoTest or <2File> to run a File AutoTest (see PRINCIPLE above in this Section) and operation proceeds to test initialization.

3.7.11.1 AUTOTEST INITIALI ZATION

When <2File> is selected to run a File AutoTest, the test initialization information is obtained from the file selected. Operation proceeds directly to the test confirmation. The RPM4-E-DWT asks the operator to confirm the range of the AutoTest (<ENTER to run…>), AutoRanges (see Section 3.7.5) and operation

cee

pro

When <1Qui Quick AutoTest, the display is:

Select <1yes> to rerun the last Quick AutoTest (see below in this Section). Select <2no> to define a new Quick AutoTest.

When <2no> is selected from the <Run current Quick AutoTest> screen, the AutoTest set-up/edit routine is accessed. The information needed to AutoRange RPM4-E-DWT based on the DUT characteristics is then collected in successive screens as follows.

• <Pressure units of measure>: The units of measure screen from the [UNIT]

ds directly to test execution (see Section 3.7.11.2).

ck> is selected to run a

un current Quick

AutoTest: 1yes 2no

function key is presented (see Section 3.7.3). Select the desired pre ssure unit of measure.

The choice of units may be modified (see Section 3.9.6).

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

• <DUT full scale:>: Enter the full scale pressure (maximum pressure) of the DUT in the measurement mode and pressure units that have been specified in the previous two steps.

• <DUT tolerance:>: Enter the DUT measurement uncertainty, accuracy or precision specification as desired in ± % FS (percent of full scale). This value will be used to determine appropriate RPM4-E-DWT resolution and stability test settings.

• <Test increment:>: Enter the test increment in % FS of the DUT. When executing the test, the test increments will be from zero to the DUT full scale, dividing by the value of the increment. If a non-even increment value is entered, the actual increments will be rounded to the lower number of increments. For example, if the DUT full scale is 10 000 psi and the increment specified is 42 %, the Sequence will run points of 0, 5 000 and 10 000 psi because 42 % goes into 100 less than three but more than two times.

• <Test point sequence:>: Select <1up> for the AutoTest sequence to run from zero to the DUT full scale; <2down> for the sequence to start at the DUT full scale and run down to zero, <3u&d> for the sequence to run from zero to the DUT full scale and back to zero; <4d&u> for the sequence to run from the DUT full scale down to zero and back to the DUT full scale.

After the last test definition entry, a screen is offered for the user to check that the correct test has been defined or selected and that it does not exceed the range of the device or system being tested:

1. Indication of minimum and maximum pressure included in the sequence which is about to run.

ENTER to run psi g 0 to 5000

Pressing [ESC] returns to the AutoTest selection screen without AutoRanging the RPM4-E-DWT and without sequence execution. Pressing [ENT] causes the RPM4-E-DWT to AutoRange based upon the DUT characteristics (see Section 3.7.5)

ceeds to text execution (see Section 3.7.11.2). To AutoRange the

and the AutoT RPM4-E-DWT base

est pro

d on DUT characteristics but not run a test sequence, [ESC] right

after AutoRanging completes (at the <Set valve for…> screen).

3.7.11.2 TEST EXECUTION

The last step of test initialization is to AutoRange the RPM4-E-DWT (see Section

3.7.11.1), then test execution begins.

The first step of test execution is to set the E-DWT Lo Q-RPT shut off valve correctly for the Q-RPT that will be used to run the test (see 3.4). The RPM4-E-DWT display is

is Lo or Hi):

(<X

et valve for XX RPT

Set the E-DWT shut off valve to shut off or connect the RPM4-E-DWT’s Lo Q-RPT as indicated by the E-DWT valve indicator LED (see Section 3.4). Turn the valve

knob fully towards the lit valve indicato

r LED until it reaches its stop.

Press [ENT] when ready to proceed with the test.

To abort the test but use the RPM4-E-DWT with the settings for the DUT that was initialized, press [ESCAPE] from the <SET VALVE FOR xx RPT> screen. This can be useful for setting up the RPM4-E-DWT to make DUT adjustments or run tests other than the one defined by the AutoTest.

3. OPERATION

The display is:

0.0 psi g Lo xercise DUT & [ENT]

The top line is the standard RPM4-E-DWT run screen indicating the current measured pressure (see Section 3.6.1). Exercise the DUT if desired using the top line indi

cation of the measured p

ressure and press [ENT] when complete.

The display is:

1. Standard RPM4-E-DWT run screen indicating current measured pressure.

2. Number of this test point/the total number of test points in the sequence.

3. Pressure to set for this increment in current pressure unit of measure and measurement mode.

0.0 psi g Lo Set 0.0 1/11

Adjust the pressure to the <Set nnnn> value indicated. Set the pressure so that the DUT, NOT the RPM4-E-DWT, indicates the <Set nnnn> value.

Once the specified pressure has been set, press [ENT]. If the RPM4-E-DWT pressure reading is in Not Ready condition (see Section 3.1.2), the RPM4-E

-DWT makes an

invalid entry sound and displays <Pressure NOT READY, TRY AGAIN>. Correct the conditions that are causing the RPM4-E-DWT reading to be excessively unstable and press [ENT] again. If the RPM4-E-DWT pressure reading is in Ready condition, the RPM4-E-DWT makes a valid entry sound and the display is:

1. Standard RPM4-E-DWT run screen indicating current measured pressure.

2. Number of this test point/the total number of test points in the sequence.

3. <F> to indicate freeze (see Section 3.7.7.7) follow reading in current units of measure captured when [ENT] was pressed in the previous <Set> screen. This is the reference pressure that was applied to the DUT when the DUT indicated the cardinal point. The frozen pressure value flashes and <OT> follows the number if the reading was out of tolerance (definition of out of tolerance is: Set point – RPM4-E-DWT reading > DUT tolerance)..

the RPM4-E-DWT pressure

ed by

497.7 psi g Lo F497.6 OT 2/11

Press [ENT] to accept this test point and proceed to the next test point or [←] to repeat the point.

Repeat the set pressure, take reading and accept data procedure until all points in the sequence have been accepted.

After the last pressure point in the sequence has been accepted the display is:

Select <1data> to view the data collected in the AutoTest that was just completed (see Section 3.8.5.1).

Select <2 Select <3repeat> to repeat the AutoTest that was just completed. Press [ESCAPE] to return to the main run screen.

AutoTest complete 1data 2new 3repeat

new> to run a new Quick or File AutoTest.

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

3.8 [SETUP]

 PURPOSE [SETUP] accesses a menu of functions and features commonly used in setting up and using the RPM4-E-DWT.

 OPERATION

To access the SETUP menu, press [SETUP] from the MAIN RUN screen. The display is:

1range 2res 3stab 4UL 5ATest

SETUP menu choices include:

<1range> Save and delete ranges created by AutoRange (see Section 3.8.1). <2re

s> Adjust the re

<3stab

> Adjust the pressure stability limit that is the criterion for the Ready/Not Ready indication

solution of pressure displays (see Section 3.8.2).

(see Section 3.8.3).

<4UL> Adjust upp <5ATest

> Set up File AutoTest files and view data files resulting from running AutoTests (See

er pressure limit alarm (see Section 3.8.4).

Section 3.8.5).

3.8.1 <1RANGE>

 PURPOSE

Save AutoRange ranges and associated settings for recall. Delete previously saved AutoRange ranges.

 PRINCIPLE

The RPM4-E-DWT AutoRange function creates a range and automatically sets various operating parameters proportionally to the range (see Section 3.7.5). Operating settings can then Table 2).

hanged by the user. Many operating settings are specific to the current range (see

be c

[SETUP], <1

range> allo

ws the AutoRange range and associated settings to be saved for recall using the [RANGE] key (see Section 3.7.2). This can avoid having to recreate frequently used rang

es and settings.

[SETUP], <1range> is also used to delete ranges that have been saved but are no longer needed.

3.8.1.1 SAVING AN AUTORANGE RANGE

 OPERATION

To save a range created by AutoRange, the range must be the active range. Use AutoRange or AutoTest to create the range (sees Sections 3.7.5, 3.7.11) and then make any desir

Once the AutoRange range is set up as desired, press [SETUP], <1range>, <1save>. The display is:

1. Indication that this is a range to be saved.

2. Designator and position of the Q-RPT used by the range to be saved.

3. Pressure unit of measure of the range to be saved.

4. Full scale pressure of the range to be saved.

ed feature and setting adjustments.

Save range A70M Hi psi 5000g

3. OPERATION

Press [ENT] to save the range or [ESC] to return to the MAIN RUN screen without saving the range.

Default (<DF>) Q-RPT ranges cannot be saved. They are permanent.

Duplicate AutoRange ranges cannot be saved. A duplicate AutoRange range is a range that has the same measurement mode and full scale and uses the same Q-RPT as a range that has already been saved.

3.8.1.2 DELETING AUTORANGE RANGES

 OPERATION

To delete a single saved AutoRange range, press [SETUP], <1range>, <2delete>. If there are any saved ranges available to delete, the display is:

1. Indication that the cursor control keys may be used to toggle through the saved ranges to select the one to be deleted.

2. Designator and position of the Q-RPT used by the range to be deleted.

3. Pressure unit of measure of the range to be deleted.

4. Full scale pressure of the range to be deleted.

Use the cursor control keys to toggle through the ranges available to be deleted. When the desired range to be deleted is displayed, press [E N T]. If you are sure you want to delete this range, press [ENT] again in response to the <Delete?> query. [ESC] returns to the <AutoRange:> screen without deleting a range.

< and > A70M Hi psi 5000g

To delete all of the saved AutoRange ranges, press [SETUP], <1range>, <3delete a ll> . If you are sure you want to delete all the ranges, respond <1yes> to the <Delete all saved ranges?> query. If not, respond <2no>.

3.8.2 <2RES> (RESOLUTION)

 PURPOSE

To set the resolution with which measured pressures and other pressure indications and settings are displayed.

 PRINCIPLE

The resolution with which RPM4-E-DWT displays pressure values can be adjusted. The resolution setting determines the number of digits with which pressure is displayed. The

resolution is calculated based on the span of the range and then rounded to the furthest digit to the right. For example, resolution of 0.001 % on a range of 1 500 psi is 1 500 X 0.001 % = 0.015 which is rounded down to 0.01 psi.

Default resolution is 0.01% of active range span. Resolution is set automatically by

AutoRange (see Section 3.7.5) and by AutoTest initialization (see Section 3.7.11).

 OPERATION

To access the resolution function, press [SETUP], <2res>. The display is:

Display resltn: Hi

0.0100 %FS < and >

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

Use the cursor control keys to set the desired level of resolution. Press [ENT] to return to the MAIN RUN screen with the new resolution setting active or [ESC] to make no changes.

The resolution setting is range specific. A resolution setting made in one range does NOT

affect other ranges.

The maximum resolution setting is limited in AutoRange ranges that are less than 10% of

the Q-RPT default full scale.

3.8.3 <3STAB> (STABILITY)

 PURPOSE

To view and/or adjust the stability test that is the Ready/Not Ready criterion for the active Q-RPT and range.

See Section 3.1.2 Pressure Ready/Not Ready.

 PRINCIPLE

The RPM4-E-DWT continuously monitors the rate of change of pressure measured by the active Q-RPT and compares this rate to the active stability limit to make a Ready/Not Ready determination (see Section 3.1.2). The stability function allows the stability limit to be adjusted by the u

ser to increase or decrease the stability required for a Ready condition to

occur.

Default stability when using AutoRange is + 0.01% FS of active range span. Default stability when AutoRanging as part of an AutoTest is 10% of the DUT tolerance (see Section 3.7.5, Table 4).

The stability limit is separate and different from the Rate DISPLAY function (see Section

3.7.7.2) which allows the current rate of change of pressure to be displayed.

 OPERATION

To access the stability setting adjustment, press [SETUP], <3stab>. The display is:

Stability limit: Hi

1.0 psi/s

Edit the desired stability limit setting. [ENT] activates the stability limit for the active range and returns to the main run screen Press [ESC] to return to the MAIN RUN screen with no change to the stability limit.

The stability setting is range specific. A stability setting made in one range does NOT affect other ranges.

3. OPERATION

3.8.4 <4UL> (UPPER LIMIT)

 PURPOSE

To set the upper pressure limit value for a pressure range and measurement mode.

 PRINCIPLE

The UPPER LIMIT function provides the user with a settable pressure limit at which an alarm sounds.

When the limit is reached, RPM4-E-DWT’s beeper sounds intermittently as long as pressure is above the limit.

The UPPER LIMIT function has two purposes. First, when UL is set to its default value, it serves as a warning that the maximum pressure of the active range is about to be exceeded. Second, UL can be set by the user to a value other than the default value to provide an alarm that a specific pressure limit has been exceeded. This feature is often used to help protect a system to which RPM4-E-DWT is connected. For example, it might be set just over the full scale of a device under test (DUT) that is being calibrated. Note that using AutoRange or AutoTest automatically sets the UL to just above the AutoRange full scale (see Sections

3.7.5, 3.7.11).

The default upper limit is 105 % of AutoRange span or 102 % of Q-RPT default (maximum) range when AutoTest is used, whichever is lower.

 OPERATION

To view or edit upper limit of the active range press [SETUP], <4UL>. The display is:

Upper limit: Hi

1. Entry field for upper limit value in active pressure unit of measure and measurement mode.

10200 psi g

Edit the upper limit value as desired. The maximum upper limit is 105 % of span in an AutoRange range or 102 % of default Q-RPT full scale, whichever is smaller. Press [ENT] to return to the MAIN RUN screen with the new upper limit active. Press [ESC] to return to the MAIN RUN screen with no change to the upper limit.

When the upper limit has been exceeded, the display of current pressure flashes and a beep sounds for 3 seconds on/2 seconds off intervals. Reduce the pressure applied to RPM4-E-DWT so that it is below the upper limit to return to normal operation.

Upper limit values are specific to each range and measurement mode.

3.8.4.1 OVER PRESSURE FUNCTION

In addition to the UL function, RPM4-E-DWT has an over pressure function. The over pressure function executes when a Q-RPT measures a pressure that is

greater than 110% of the Q-RPT’s default span. This is 1100 psi (7.56 MPa) for the A7M Q-RPT and 11000 psi (75.6 MPa) for the A70M Q-RPT.

The over pressure func tion causes the measured pressure display to flash. The overpressure function also logs the time and date of the overpressure condition in both user and factory logs to assist in incident diagnosis (see Section 3.9.7.5).

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

To recover from an overpressure condition, cycle RPM4-E-DWT power. Before cycling power, be sure to correct the condition that caused the overpressure.

3.8.5 <5ATEST>

 PURPOSE

To view data collected while running an AutoTest and/or to view and edit File AutoTest definition files.

See Section 3.1.3, PRINCIPLE for information on the AutoTes

 OPERATION

To access the ATest menu select [SETUP], <5ATest>. The display is:

Select <1data> to view AutoTest results data (see Section 3.8.5.1).

Selec file (see Section 3.8.5.2).

2file> to view or edit an AutoTest definition

t <

tion.

t func

AutoTest: 1data 2file

3.8.5.1 DATA

 PURPOSE

To view the data files that are created when an AutoTest is run.

 PRINCIPLE

RPM4-E-DWT supports AutoTest automated tests (see Section 3.1.3). When an AutoTest operator at each point is logged. The logged pressure measurements and an identifying header are stored in a data file. The data file can be viewed immediately following the last point of the sequence by selecting <1data>. In addition, the last ten data files recorded can be viewed anytime by selecting [SETUP], <5ATest>, <1data>.

is run, the RP

M4-E-DWT pressure measurement accepted by the

Data File Protocol Up to ten data files are buffered, ten at a time, in RPM4-E-DWT memory. When

a new AutoTest run is completed, its data file goes to the back of the queue and the oldest data file is deleted.

Data files are identified by a header whose first line is the full scale of the DUT and the number of test points in the AutoTest. The second line is the date (YYYYMMDD) and time (HH:MMa) at which the last point of the sequence was accepted.

Following the data file header, each test point is recorded including the pressure reading of the RPM4-E-DWT with head, AutoZ and range status as well as an indication of whether the reading was out of tolerance and the test point number over the total number of test points in the Sequence.

 OPERATION

To access the AutoTest results data file viewing function press [SETUP], <5ATest>, <1data>.

3. OPERATION

The first display is the data file header which can be used to toggle through data files:

1. Full scale of the AutoTest with pressure unit of measure and measurement mode.

2. Number of test points executed/total number of points in the AutoTest.

3. Date and time that the last point in the AutoTest was executed.

6000 psig 6/6 20070922 10:51:01 am

Press [+/-] or [→] to scroll through the headers of the other AutoTest data files available. RPM4-E-DWT stores up to ten AutoTest data files in order of execution with a new data file pushing all the files back and deleting the oldest one. When the header of the AutoTest data file you would like to view appears, press [ENT] to view the first point of the identified AutoTest data file.

The display is:

1. RPM4-E-DWT reading logged for the test point.

2. Head, AutoZ and Q-RPT indicator (same as in the RPM4-E-DWT main run screen) (see Section 3.6.1).

Indication that th view screen.

4. <FA> indicating that the AutoTest was a File AutoTest or <QA> indicating a Quick AutoTest. This is preceded by <OT> if the test point was out of tolerance (definition of out of tolerance is Set point – RPM4-E-DWT reading > DUT tolerance).

5. Number of this test point over total number of points in the AutoTest.

is is an AutoTest data file

0.00 psig hzHi View data FA 1/10

Press [ENT] to move to the next data point. Press [←] or [→] to scroll backward and forward through the test points. The data file header is between the first point and the last point.

Press [ESC] to exit the data file. Confirmation is required to exit the data view function.

Up to ten data files are buffered, ten at a time, in RPM4-E-DWT memory. When a new AutoTest run is completed, its data file goes to front of the queue and the oldest data file is deleted.

3.8.5.2 FILE

 PURPOSE

To view and edit File AutoTest definition files.

 PRINCIPLE

RPM4-E-DWT supports AutoTests (see Section 3.7.11,  PR There are two types of AutoTests:

• Quick AutoTests in which the DUT and test parameters are entered “on the

fly” during the initialization of the test.

• File AutoTests in which the DUT and test parameters are stored in a file and

retrieved when the file is selected to run an AutoTest.

CIPLE).

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

File AutoTest parameters are stored in definition files. [SETUP], <5AutoTest>, <2file> allows File AutoTest definition files to be viewed and edited. Up to 40

File AutoTest definition files with up to 21 test points in each file can be created. A File AutoTest definition file defines:

• The identifying number of the File AutoTest definition file.

• Pressure unit of measure.

• DUT full scale in pressure unit of measure and measurement mode.

• DUT tolerance (% FS).

• Number of test points or pressure targets to include in the AutoTest.

• Numerical value of each test point or pressure target.

See Section 3.7.11,  O

PERATION f

or information on running a Quick or File

AutoTest. See Section 3.8.5.1 for information on viewing the data file

s that result from

running a Sequence.

 OPERATION

See Section 3.7.11, OPERATION, for information on RUNNING a Quick or File AutoTest.

To access the AutoTest definition viewing and editing functions press [SETUP], <5ATest>, <2file>. Select <1view> to view an AutoTest definition file. Select <2edit> to edit an AutoTest definition file.

When <2edit> is selected the display is:

Edit File AutoTest # 1

Enter the number (1 - 40) of the File AutoTest to be edited.

To create a File AutoTest definition file similar to an existing definition file without entering all the definition information, edit an existing definition file and at the end of the editing process, save it as a different file number.

The display is:

1psi 2MPa 3kPa 4bar

The unit of measure selection screen is the current [UNIT] selection screen (see Section 3.7.3). Select the desired pressure measurement unit for the AutoTest.

The display is:

DUT full scale: 6000 psi g File1

Enter the full scale pressure of the DUT to be calibrated with this File AutoTest. The value entered will be used along with the DUT tolerance to AutoRange RPM4-E-DWT settings when the File AutoTest is run (see Section 3.7.5,

NCIPLE).

 PRI

The display is:

DUT tolerance:

0.25% FS File1

Enter the tolerance in % of full scale (measurement uncertainty, precision or accuracy as desired) of the DUT to be calibrated using this File AutoTest. The value entered will be used along with the DUT full scale to determine

3. OPERATION

RPM4-E-DWT AutoRange settings when the AutoTest is run (see Section 3.7.11,  PRINCIPLE).

The display is:

Enter the total number of pressure points or target pressures to be included in the AutoTest. The maximum number of points is 21. If data is to be taken at “zero” pressure, include the “zero” points in the point count.

The display is:

Enter the numerical value of the target pressure point <N>. Repeat until all of the points in the File AutoTest have been defined.

The display is:

Enter the identifying number under which this File AutoTest definition file is to be saved. A confirmation is required to overwrite and existing sequence.

While editing a File AutoTest, pressing [ESC] backs through entries until editing of the pressure target values has begun. Then [ESC] can only be used to abandon editing.

3.9 [SPECIAL]

 PURPOSE

Number of targets: 1 File1

Pressure target N:

0.0 psi g File1

Pressure target N:

0.00 psi g File1

[SPECIAL] accesses a menu of RPM4-E-DWT functions and features that are less commonly used or not normally used in regular operation.

 OPERATION

1AutoZ 2remote 3head

Press [SPECIAL] from the MAIN RUN screen to access the SPECIAL menu. The display is:

4SDS 5prefs 6Punit 7intern 8cal 9reset

Some screens, such as the SPECIAL menu, go beyond the two lines provided by the display. This is indicated by a flashing arrow in the second line of the display. Press the cursor control keys to move the cursor to access the lines that are not visible or directly enter the number of the hidden menu choice if you know it.

SPECIAL menu choices include:

<1AutoZ> Manage the AutoZero function for the active Q-RPT (see Section 3.9.1). <2remote

> View and edit COM port (RS-232) and IEEE-488 interface settings. Select remote syntax

style (see Section 3.9.2).

<3head> <4SDS

> Feature not used in the RPM4-E-DWT A70M/A7M-AF model.

Set HEAD function fluid and height unit of measure (see Section 3.9.3).

<5prefs> View and set screen saver time, keypad sound frequency, unit ID number, time/date,

security protection level (see Section 3.9.5).

<6Punit> Customize the [U <7int

ern> View internal barometer, view and set pressure reading rate setting, view incident log

NIT] key pressure unit of measure selections (See section 3.9.6).

(see Section 3.9.7).

<8cal

> View and adjust RPM4-E-DWT Q-RPT and barometer calibration coefficients (see

Sections 3.9.8, 5.2.2).

<9reset>

Access RPM4-E-DWT’s various reset functions (see Section 3.9.9).

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

3.9.1 <1AUTOZ>

 PURPOSE

To turn ON and OFF the AutoZ function that allows the Q-RPT reading to be zeroed and the dynamic compensation for atmospheric pressure changes feature. Also, view and adjust the value of the AutoZ offset.

To RUN the AutoZ routine that zeroes the Q-RPT, use [AutoZ] (see Section 3.7.10).

 PRINCIPLE

AutoZ Purpose and Principle The RPM4-E-DWT AutoZero function (AutoZ) is used to achieve gauge measurement mode

with the RPM4-E-DWT’s intrinsically absolute Q-RPTs and to eliminate the influence of zero drift on measurement uncertainty. AutoZ can also tare out fluid heads between the E-DWT and the device under test.

The AutoZ functions provides full on-board support for regular zeroing including determination, application and storage of offset values as well as dynamic compensation for changes in atmospheric pressure between zeroing opportunities. The operator initiates Q-RPT zeroing by pressing the [AutoZ] key from the main run screen when zero (atmospheric pressure) is applied to the RPM4-E-DWT Q-RPT.

The AutoZero function uses four values:

1. P

: Zero (atmospheric pressure) which is supplied by definition when the Q-RPT is

std,0

active, the reservoir shut off valve is close, the TEST shut off valve is open and the TEST port is disconnected and filled with oil to the weep hole (reference level).

2. P

: The absolute pressure reading of the Q-RPT, with no AutoZ offset, at the time

u,0

[AutoZ] is pressed.

3. P [AutoZ] is pressed (P

offset,G

4. ΔP

: The difference between the reading of the Q-RPT with no AutoZ offset when

offset,G

), and zero gauge pressure (atmospheric gauge pres sure) (P

u,0

= P

- P

u,0

: The difference between atmospheric pressure (absolute) as measured by the

atm

std,0

RPM4-E-DWT’s on-board barometer when [AutoZ] was last pressed and the current measured value. ΔP pressure between updates of P

is used to compensate real time for the evolution of atmospheric

atm

by [AutoZ]. ΔP

offset,G

is dependent only upon the ability of

atm

the barometer to measure small changes in atmospheric pressure over short time periods, not upon the barometer’s absolute accuracy or long term stability.

The gauge pressure measured by the RPM4-E-DWT Q-RPT at any given moment is: P

gauge

= Pu - P

offset.G

- ΔP

atm

The AutoZ function can be turned ON and OFF. When the AutoZ function is OFF, the [AutoZ] function to rezero the RPT is no longer available and dynamic compensation for changes in atmospheric pressure using the RPM4-E-DWT’s on-board barometer is no longer active. AutoZ should be left on at all times unless the RPM4-E-DWT’s on-board barometer is inoperable.

The AutoZ function and values are Q-RPT specific.

 OPERATION

To RUN the AutoZ routine that rezeroes the Q-RPT, use [AutoZ] (see Section 3.7.10).

3. OPERATION

To access the RPM4-E-DWT AutoZ function press [SPECIAL], <1AutoZ>. The display is:

1. Active Q-RPT designator.

2. Indication of active measurement mode (al ways <gage> for gauge in the RPM4-E-DWT A70M/A7M-AF model).

3. Indication of whether AutoZ is currently ON or OFF for this Q-RPT.

1off 2view Hi 3edit gage ON

Select <1off> (or <1on>) to change the AutoZ status for the current Q-RPT and measurement mode from ON to OFF or vice versa.

AutoZ ON is indicated by a <z> in the MAIN RUN screen, top line, third character from the right. When AutoZ is OFF, the character is blank. AutoZ should always be left ON in RPM4-E-DWT A70M/A7M-AF unless the on-board barometer becomes inoperable.

Select <2view> to view the current value of P

The value of P

is always displayed and entered in Pascal (Pa). P

offset

for the active Q-RPT.

offset

should be roughly

offset

equal to atmospheric pressure.

Select <3edit> to edit the value of P Edit P

changes.

as desired and press [ENT] to activate the new value. Press [ESC] to abandon

offset

for the active Q-RPT and measurement mode.

offset

There is no reason to edit P P

should only be adjusted using [AutoZ] (see Section 3.7.10).

offset

during normal RPM4-E-DWT operation or maintenance.

offset

3.9.2 <2REMOTE>

 PURPOSE

To configure the RPM4-E-DWT COM1 and COM2 communication ports. To test COM1 and COM2 communications. To select the remote programming communications format.

 PRINCIPLE

The RPM4-E-DWT has two RS-232 communications ports referred to as COM1 and COM2. COM1 is for communicating with a host computer (see Section 4), and COM2 is reserved for comm ports’ settings can be viewed and changed using [SPECIAL], <2remote>.

RPM4-E-DWT has two remote communications formats, classic and enhanced (see Section

4.3). The active format can be selected. A self t

RPM4-E-DWT RS232 ports (COM1 and COM2) are operating properly and that a valid interface cable is being used.

 OPERATION

To access the communications settings, press [SPECIAL], <2Remote>.

ng with an external device (e.g. an RPM4-E-DWTx, a multimeter, etc.). The

unicati

est is supplied for RS-232 communications. The self test allows verification that the

• Select <1CO M1> to vi ew and edit COM1 settings (see Secti on 3. 9.2.1).

• Selec

t <2

COM2> to view and edit COM2 settings (see Section 3.9.2.1.).

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

• Select <4format> to select the remote communications command format (see Section

3.9.2.3).

• Select <

3.9.2.4).

5RS232test> to run the COM1 and COM2 communications test (see Section

3.9.2.1 <1COM1, 2COM2>

The COMx ports can be set for specific communications settings. The settings are baud rate, parity, data bits and stop bits. The available options are:

Baud 300, 600, 1 200, 2 400, 4 800, 9 600, 19 200, 28 800, 38 400 Parity NONE, ODD or EVEN Length 7 or 8 Stop Bit 1 or 2

The default is <2 400, E, 7,1> for both COM1 and COM2. The user can also specify one or two termination characters, referred to as

“Term1” and “Term2”, as well as define these characters. These define the characters that mark the end of commands that are sent to the RPM4-E-DWT as well as mark the end of replies sent back to the host computer. The RPM4-E-DWT typically uses the <Term1> character to mark the end, and will ignore the <Term2> character. The characters can be any decimal number from 1 to 255. The defaults are <13> (carriage return) and <10> (line feed) and usually should not be changed.

3.9.2.2 <3IEEE-488>

An IEEE-488 interface is not included in the E-DWT A70M/A7M-AF model.

3.9.2.3 <4FORMAT>

The RPM4-E-DWT has two different syntax formats available for the remote program commands.

The classic remote command format is highly intuitive and conforms with previous DHI PPC and RPM4 products.

The enhanced remote command format generally uses the same commands as the classic format, but in addition it follows the syntax, format, and status reporting features of IEEE Std 488.2.

The details of each format are covered in Section 4.3. [SPECIAL], <2remote

to be selected. The cursor is on the active format. Select <1classic> or

<2enhanced> as desired.

>, <4format> allows the remote program command syntax

3.9.2.4 <5RS232 SELF-TEST>

The RS232 self-test is provided to check the RPM4-E-DWT COM ports and the interface cable independently of an external device or computer.

If you are having difficulty communicating with RPM4-E-DWT from a host computer using RS232, the RS232 self test can help establish that the

RPM4-E- DWT COM1 por t you are trying to communicate with and the interface cable you are using are good.

To run a self test of the RS232 ports (COM1 and COM2), press [SPECIAL], <2remote>, <5RS232test>.

3. OPERATION

The display prompts you to connect COM1 to COM2 using a standard pin-to-pin DB-9F to DB-9M RS232 cable.

Once the cable has been installed, press [ENT] to run the self-test. The test is first executed in the COM1→COM2 direction and then in the COM2→COM1 direction.

If the COM1→COM2 test passes: <PASSED> displays briefly and the test proceeds to COM2→COM1.

If COM2→COM1 passes: <PASSED> is displayed briefly followed by the conclusion, <The RS232 test has PASSED>.

If a test fails: Execution is suspended until [ENT] is pressed.

The RPM4-E-DWT RS232 test can fail for three reasons:

The RS232 cable being used is incorrect (Section 4.2.1.1, 4.2.1.2) for information on the correct cable).

COM1 and COM2 do NOT have the same serial communications settings and therefore cannot communicate together (see Section 3.9.2.1 to set the COM ports).

or COM2 is defectiv

COM1

The reason for failed communications is almost always a cable or incorrect RS232 interface settings. Be sure that these are correct before concluding that a COM port is defective.

3.9.3 <3HEAD>

 PURPOSE

To view or change the properties of the HEAD function (see Section 3.7.8) including the unit of measure of l calculations.

 OPERATION

ength for he

ad height entry and the test fluid type and species for density

From the MAIN RUN screen, press [SPECIAL], <3Head>. Select the desired height unit of measure and press [ENT]. Select <1gas> or <2liqud> depending on the pressurized medium between the

RPM4-E-DWT and the height at which pressure is to be calculated. Select the gas or liquid species. The liquid selection <3User>, is to create a custom liquid with a user entered density.

Use [HEAD] to set a head height if desired.

3.9.4 <4SDS>

 PURPOSE

This feature is not used in RPM4-E-DWT A70M/A7M-AF.

3.9.5 <5PREFS>

 PURPOSE

To access a menu of RPM4-E-DWT operational preferences and functions.

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

 OPERATION

To access the PREFS menu press [SPECIAL], <5prefs>. The display is:

1ScrSvr 2sound 3time 4ID 5level

The PREFS menu includes:

<1ScrSvr> View and change the screen saver activation time (see Section 3.9.5.1). <2so

und>

<3ti

<4ID>

View and change the key press sounds (see Section 3.9.5.2).

> View and edit the internal time and date settings (see Section 3.9.5.3).

View the RPM4-E-DWT serial number (SN) and view or edit the ID number (see Section 3.9.5.4).

<4lev

el> View and set the user security level and/or password (see Section 3.9.5.5).

3.9.5.1 <1SCRSVR>

 PURPOSE

To adjust the idle time after which RPM4-E-DWT’s SCREEN SAVER activates.

 PRINCIPLE

RPM4-E-DWT has a SCREEN SAVER function which causes the display to dim afte r a front panel key is NOT pressed for a certain amount of time. The default is for the screen saver to activate a fter 10 i dle minut es. The screen sa ver activ ation time can be adjusted by the user or screen saving can be completely eliminated.

Setting screen saver time to zero eliminates the SCREEN SAVER function so

that the display permanently remains at full brightness.

 OPERATION

To access the SCREEN SAVER function, press [SPECIAL], <5prefs>, <1ScrSav>. Edit, in minutes, the idle time after which screen saver will activate

to dim the screen. Set the time to zero to eliminate t he SCREEN SAVER function.

3.9.5.2 <2SOUND>

 PURPOSE

To adjust or suppress the RPM4-E-DWT valid key press sound.

See Section 3.6.4 for information on the complete list of sounds made by

RPM4-E-DWT and their meanings.

 PRINCIPLE

RPM4-E-DWT provides audible feedback by a brief “beep” when a valid key press is made. The tone frequency of this beep may be selected from three choices or it may be completely suppressed. Invalid key presses are indicated by a descending two tone “blurp” which cannot be suppressed.

 OPERATION

To access the keypad sound adjustment function press [SPECIAL], <5prefs>, <2sound>.

Select between <2lo>, <3mid> or <4hi> to adjust the valid key press tone frequency.

3. OPERATION

The sound function only affects the valid key press tone. The invalid key press

tone and other RPM4-E-DWT sounds cannot be adjusted or suppressed.

Select <1none> to suppress the valid key press tone.

3.9.5.3 <3TIME>

 PURPOSE

To view and edit the RPM4-E-DWT internal time and date settings.

 OPERATION

To access the TIME function press [SPECIAL], <5prefs>, <3time>.

The display is:

Select <1time> to edit the time. Edit hours, then minutes, then am/pm by pressing [ENT] after each entry. Seconds go to zero when minutes are entered. This can be used to synchronize the time with a time standard.

Select <2date> to edit the date. The date must be specified in YYYYMMDD format.

Edit: 1time 2date 08:32:11 am 20080125

The RPM4-E-DWT date and time are set to United States Mountain Standard Time in the final test and inspection process at the factory. If desired, use the TIME and DATE function to set your local time and date.

3.9.5.4 <4ID>

 PURPOSE

To view or edit the RPM4-E-DWT user ID and to view the RPM4-E-DWT serial number.

 OPERATION

To access the ID function press [SPECIAL], <5prefs>, <4ID>. Select <1view> to view the current ID. Select <2edit> to edit the ID. The ID has twelve characters. When the edit screen is opened, the cursor is on

the first character. Numerical values can be entered directly from the keypad. In addition, the cursor control keys can be used to toggle through a list of available alphanumeric characters. Holding the key slews through the characters. Character order going up is: blank space, symbols, lower case letters, upper case letters, and numbers. After selecting a character, press [ENT] to activate it and move to the next character field.

When a character is selected the cursor moves to the next character. To leave a blank character, press [ENT] with the field for that character blank. Use this for the trailing characters if the ID being entered is less than twelve characters.

After the last of the twelve characters has been entered, the <Save ID?> option is offered. Select <1no> to return to the ID edit screen. Select <2yes> to save the edited ID.

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

The ID can be set remotely from a computer which is quite a bit more convenient than entering characters from the keyboard (see Section 4.4.4, “ID” command). The ID is not cleared or reset by any RESET function (see Section 3.9.9).

3.9.5.5 <5LEVEL> (SECURITY)

 PURPOSE

To set user protection levels to restrict access to certain functions and to edit the password required for changing user levels.

 PRINCIPLE

RPM4-E-DWT’s front panel user interface provides the means to access all RPM4-E-DWT user defined data, settings and functio ns including calibration data. Inadvertent, uninformed or unauthorized altering or deleting of data, settings and functions could require extensive reconfiguration by the user and might cause invalid readings and behavior. For these reasons, depending upon the applicat ion in which RPM4-E-DWT is being used, it may be desirable to restrict access to some functions. The user level function provides a means o f restricting access to certain functions. Four different levels of security are available.

Access to changing security levels can be left open, or be protected by a password.

Security Levels

The security levels are structured to support typical operating environments as follows:

None This level is intended for use only by the system manager and/or

calibration facility. It allows access and editing in all areas including critical metrological information.

Low Low security is designed to protect the specific metrological

information and SYSTEM DIAGNOSTIC AND MAINTENANCE functions of the system against accidental alteration. It is intended for an advanced operator performing many different tasks. Low security is the default user level setting.

Medium Medium security is designed to protect specific metrological

information in the system and to assure that the RPM4-E-DWT is operated using consistent operational parameters.

High High security is designed to protect all operating parameters. It is

intended to minimize operator choices, for example to perform repeated identical calibrations under consistent conditions.

RPM4-E-DWT is delivered with the security level set at low to avoid inadvertent altering of critical internal settings but with access to changing security levels unrestricted. It is recommended that the low security level be maintained at all times. If there is a risk of unauthorized changing of the security level, changing authority should be password protected (see  OPERATION of this section).

The security levels are structured to support typical levels of operation as shown in Table 5. Specifically, the security levels prevent execution of accessed by the key strokes marked by “•”:

the functions

3. OPERATION

Table 5. Security levels

FUNCTION LOW MEDIUM HIGH [RANGE] [ENT] (AutoTest) [UNIT] [MODE] [AutoRange] [LEAK CK] [DISPLAY] [HEAD] [SDS] (NOT USED IN THIS RPM4-E-DWT MODEL) [AutoZ] (in absolute mode) [SETUP] [SETUP], <1range> [SETUP], <2res> [SETUP], <4UL> [SETUP], <5ATest> [SPECIAL] [SPECIAL], <1AutoZ> [SPECIAL], <1AutoZ>, <1on/1off> [SPECIAL], <1AutoZ>, <3edit> [SPECIAL], <2remote> [SPECIAL], <2remote>, make changes [SPECIAL], <3head> [SPECIAL], <4SDS> (NOT USED IN THIS RPM4-E-DWT

MODEL) [SPECIAL], <5pref>, <1ScrSvr>

[SPECIAL], <5pref>, <2sound> [SPECIAL], <5pref>, <3time> [SPECIAL], <5pref>, <3time>, make changes SPECIAL], <5pref>, <4ID>, <2edit> [SPECIAL], <6Punit> [SPECIAL], <7intern> [SPECIAL], <7intern>, <3RPT2x> (NOT USED)) [SPECIAL], <7interrn>, <5log>, clear log [SPECIAL], <8cal> [SPECIAL], <8cal>, <2edit> under any selection [SPECIAL], <4reset> [SPECIAL], <4reset>, <4cal> [SPECIAL], <4reset>, <5all> Remote communications disabled

“•” indicates the function/menu is NOT accessible.

•

• •

•

• •

•

• •

•

• •

•

• •

• • •

•

• •

• • •

• •

• • •

• •

• • •

• •

• • •

•

 OPERATION

RPM4-E-DWT is delivered with no active password and access to the User Level menu is open. The user l evel i s set to <1Low>. User levels can be changed freely until a password has been created.

To access the LEVEL function press [SPECIAL], <5prefs>, <5level>. The display is:

Selecting <1change user level> brings

up the restriction menu:

1change user level 2edit password

Restrictions: 1none 2low 3medium 4high

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

The cursor is on the current restriction level. Select a different level or or [ESC] back to the MAIN RUN screen.

If no password is active, selecting <2edit password> displays the user

password and allows it to be edited.

Password: pppppp 0 disables password

Once a password has been entered, the user level cannot be changed without

reentering the password.

Passwords can be up to six numbers in length and cannot start with a zero. If <0> is entered, the password is made inactive and the user will not be required to enter a password to access the user level menu. This condition, with a security level of <2low>, is the factory default.

If there is an active password, the RPM4-E-DWT password entry screen appears. The user must enter the user defined password or the factory secondary password to proceed further:

RPM4-E-DWT SNnnnnxx

Password: pppppp

The first field, <nnnn>, is the serial number of the RPM4-E-DWT, followed by a second field, <xx>, that represents the number of times that a secondary password has been used. The second field, <xx>, increments each time a secondary password is used. The third field, <pppppp> is for user entry of the normal password.

The factory secondary password is available in case the user’s password has been misplaced or forgotten. It can be obtained by contacting a DHI Authorized Service Center (see Table 25). The factory secondary

password is different for all

RPM4-E-DWT’s and changes each time it is used.

3.9.6 <6PUNIT>

 PURPOSE

To customize the selection of pressure units of measure available in the [UNIT] key menu.

 PRINCIPLE

The [UNIT] function key makes available a choice of four default pressure units (psi, MPa, kPa, bar) (see Section 3.7.3 ). RPM4-E-DWT also supports many commonly used units other t

n those included in the default set up. These units can be made available for active selection by customizing the UNIT function using [SPECIAL], <6Punit>. This allows RPM4-E-DWT to offer a very wide selection of units while simplifying day to day operation. The typical user customizes the [UNIT] function key to support his/her most commonly used units. Up to six units can be included in the [UNIT] screen.

 OPERATION

To customize the [UNIT] function key, press [SPECIAL], <6Punit> from the MAIN RUN screen. The display is:

1. Entry field to specify which unit position (1 to 6) of the [UNIT] function key menu is to be changed.

Set up unit #5

3. OPERATION

Enter the number of the unit position that you would like to change. The display becomes:

Unit#5 1SI 2other 3altitude 4user

Select the desired pressure unit category (SI units include units based on SI units such as mmHg), then select the desired unit from the unit menu. <3altitude> is not available in this RPM4-E-DWT model.

The units of measure available are listed in Table 6.

Table 6. UNIT function - available units of measure

<1SI> <2OTHER> <3ALTITUDE

<1Pa> <2hPa> <3kPa>

<4MPa>

<5mbar>

<6bar>

<7mmHg>

<8mmWa>

<1psi> <2psf>

<3inHg> <4inWa> <5kcm2>

Not available

in this

RPM4-E-DWT

model

<4USER>

If <4user> is selected, the user unit must be defined. The display is:

Define user unit:

1. Entry field.

1.000000 unit/Pa

Enter the number of user units per Pascal (Pa) in the entry field. Pressing [ENT] defines the user unit and returns to the <Set up unit #n> screen.

The user defined unit label can be customized to any alphanumeric, four character label

using the remote command “UDU” (see Section 4.4).

See Section 7.1.1 for the pressure unit conversion factors used by RPM4-E-DWT.

3.9.7 <7INTERN>

 PURPOSE

To view, set, adjust, and maintain various aspects of RPM4-E-DWT’s internal operation.

 OPERATION

To access the internal selections press [SPECIAL], <7intern>. The display is:

The INTERNAL menu choices include: <1baro> View the real time output of the RPM4-E-DWT on-board barometer (see Section

3.9.7.1). <2ReadRt>

Turn ON and OFF RPM4-E-DWT’s automated, rate of change dependent,

reading and integration and display rate feature (see Section 3.9.7.2).

RPT2x

> Feature not used in this RPM4-E-DWT model.

1baro 2ReadRt 3RPT2x 4lo vnt 5log

<4lo vnt> Feature not used in this RPM4-E-DWT model. <5log> View the RPM4-E-DWT incident log (see Section 3.9.7.5).

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

3.9.7.1 <1BARO>

 PURPOSE

To view the value of atmospheric pressure as measured by the RPM4-E-DWT on-board barometer.

 PRINCIPLE

RPM4-E-DWT A70M/A7M-AF is equipped with an on-board barometer. The atmospheric pressure measurements made by the on-board barometer are used for dynamic compensation of atmospheric pressure when making gauge pressure measurements (see Sections 3.9.1).

See Section 5.5.4 Figure 14 and Section 5.5.6, Figure 15 for a photo and

schematics showing the position of the on-board barometer in RPM4-E-DWT.

The on-board barometer is a low accuracy sensor used only for measuring small changes in atmospheric pressure over short periods of time (see Section 3.9.1). RPM4-E-DWT measurement uncertainty does not depend on the measurement uncertainty of the on-board barometer.

 OPERATION

To view the current reading of the on-board barometer press [SPECIAL], <7intern>, <1baro>. The display is in the active pressure unit of measure

(see Section 3.7.3). The display resolution is fixed to 0.1 Pa, or its equivalent.

3.9.7.2 <2READRT>

 PURPOSE

To turn ON and OFF RPM4-E-DWT’s automated, rate of change dependent, reading integration and display rate feature.

 PRINCIPLE

To obtain maximum resolution from RPM4-E-DWT Q-RPT pressure measurements, an integration time of about 1.2 second per reading is used. In most situations, maximum precision is needed when pressures are stable so a relatively slow display update rate presents no disadvantage. However, when pressure is changing quickly, more rapid pressure updates are usually more important than obtaining maximum precision on individual readings. The RPM4-E-DWT read rate function automatically adjusts pressure measurement integration time depending on the rate of change of pressure. When pressure is changing rapidly, reading rate is increased. When pressure is evolving slowly, reading rate is decreased and maximum precision is obtained.

When the automated read rate function is ON, three pressure rate of change dependent read rates are used. The result is three display update rates:

Table 7. READRT – display update rates

PRESSURE

RATE OF CHANGE

> 3 % of range span/s > 0.5 and < 3 % of range span/s < 0.5 % of range span/s

DISPLAY

UPDATE

≈ 0.2 s ≈ 0.6 s ≈ 1.2 s

3. OPERATION

For situations in which maximum reading precision is desired regardless of pressure rate of change, the RPM4-E-DWT automated read rate function can be turned OFF.

In this case, the reading rate is always the high resolution rate of about 1.2 readings per second.

 OPERATION

To turn the automated read rate function ON or OFF or check its current status, press [SPECIAL], <7intern>, <2ReadRt>.

The display is:

Auto read rate: 1on 2off

The cursor is on the current selection. Selecting <1on> activates the automated reading rate and returns to the MAIN

RUN screen. Selecting <2off> turns OFF the automated reading rate and returns to the MAIN RUN screen.

Auto read rate ON/OFF is NOT Q-RPT or range specific. Turning auto read rate ON or OFF in one range turns it ON or OFF for all RPM4-E-DWT ranges.

3.9.7.3 <3RPT2X>

The default RPM4-E-DWT condition is auto read rate ON.

 PURPOSE

This feature is not used in this RPM4-E-DWT model.

3.9.7.4 <4LO VNT>

 PURPOSE

This feature is not used in this RPM4-E-DWT model.

3.9.7.5 <5LOG>

 PURPOSE

To view and/or clear the RPM4-E-DWT event log.

 PRINCIPLE

RPM4-E-DWT records to a log each time one of the following events occurs:

• Pmax! of an internal RPM4-E-DWT Q-RPT is exceeded (see Section

3.8.4.1).

• A

memory

 OPERATION

To view the event log press [SPECIAL], <7intern>, <5log>. The oldest logged event appears. Pressing the left or right arrow keys, [<] or [>], steps through the logged events from the oldest to the most recent and ending with the option to clear the log, <1no>, <2yes>. The log clear choice is not available in all security levels (see Section 3.9.5.5, Table 5). Pressing the down arrow key displays the number of the event and the date an

When all events have been viewed, <End of log> displays.

fault occurs.

d time the event occurred.

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

3.9.8 <8CAL>

 PURPOSE

To calibrate the RPM4-E-DWT Hi and Lo Q-RPTs and adjust the on-board barometer. These functions are considered part of RPM4-E-DWT maintenance and are covered in the maintenance section of this manual (see Sections 5.2.2, 5.2.2).

3.9.9 <9RESET>

 PURPOSE

To reset various RPM4-E-DWT settings to default or factory values.

 PRINCIPLE

RPM4-E-DWT stores its user definable settings in non-volatile memory. The reset menu allows the user to selectively or completely reset these settings to factory defaults. This clears any settings that the user has made, and should be used only to restore the RPM4-E-DWT to a known state. RPM4-E-DWT goes through its power up sequence after any type of reset is executed.

RPM4-E-DWT reset functions will change current settings to factory defaults. These may include settings vital to RPM4-E-DWT operation and affecting the calibration of the reference pressure transducers (RPTs). Reset functions should only be used by qualified personnel with knowledge of reset consequences. Reset functions should never be used “experimentally”.

 OPERATION

To access the RESET menu, press [SPECIAL], <9reset>. The display is:

1sets 2units 3ATest 4cal 5all

RESET menu choices include:

<1sets> to reset general system operating parameters (see Section 3.9.9.1). <2uni <3

ATest

to reset unit of measure functions (see Section 3.9.9.2).

ts>

> to reset AutoTest parameters, clear File AutoTest files and clear the AutoTest

data log (see Section 3.9.9.3).

<4cal

> to reset internal calibration coefficients and modes (see Section 3.9.9.4).

5all> to reset all settings excep

t ID and security password to factory default values

(see Section 3.9.9.5).

3.9.9.1 <1SETS>

 PURPOSE

Sets most general operating parameters back to default values. Does not affect calibration coefficients, remote interfac es or AutoRange ranges. The Reset – Sets resets are itemized in Table 8.

3. OPERATION

Table 8. Reset – Sets

RESET RESULT SEE SECTION

[UNIT] Pressure unit of measure to first of the six available 3.7.3 [RANGE] Hi Q-RPT default range 3.7.2 [HEAD] 0 in height and Oil medium 3.7.8, 3.9.3

Stability Limit 0.01 % of Hi Q-RPT default range 3.8.3 Upper Limit Hi Q-RPT default range default value 3.8.4 Resolution 0.01 % FS of Hi Q-RPT default range 3.8.2 AutoZ AutoZ ON for all Q-RPTs, Z AutoZ P Leak Check 15 second run time. Clear logged results 3.7.6 Screen Saver 10 minutes to activation 3.9.5.1 Key Sounds Medium tone valid key press sound 3.9.5.2 Lo Vnt Automatic None ReadRate Automatic 3.9.7.2

set to 101.325 kPa a 3.9.1

atm,0

value not affected 3.9.1

offset

3.9.9.2 <2 UNITS>

 PURPOSE

Sets the pressure units available under the UNIT function to default selections depending (see Section 3.7.3).

Sets the user defined unit to 1.000/Pa (see Section 3.9.6). Sets the refe

rence temper

ature for inWa unit to 20°C.

3.9.9.3 <3ATEST>

 PURPOSE

• Resets Auto Tests to default characteristics (see Section 3.7.11).

• Clears Fil

• Clears AutoT

e AutoTest definition files (see Section 3.8.5.2).

est results data logs (see Section 3.8.5.1).

3.9.9.4 <4 CAL>

 PURPOSE

The Reset - Cal function will reset the Q-RPT and barometer calibration coefficients and reset AutoZ values to zero. This will change the RPM4-E-DWT calibration and could cause it to make out of tolerance measurements.

Clears all user values affecting the calibration of Q-RPTs and the on-board barometer. The Reset – Cal resets are itemized in Table 9.

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

Table 9. Reset – Cal

RESET RESULT SEE SECTION

All Q-RPT Calibration Coefficients

On-board Barometer Calibration Coefficients

Calibration Date Set all dates to 19800101 5.3.7, 5.2.2 AutoZ value 101325 Pa

AutoZ function ON, all Q-RPTs 3.9.1

PA to zero, PM to 1 5.3.1.1

PA to zero, PM to 1 5.2.2

Gxxx, BGxxx Q-RPTs: All P

3.9.9.5 <5 ALL>

values to zero

offset

3.9.1

The reset - all function clears and deletes large amounts of user defined information including critical calibration data.

 PURPOSE

Combines all resets in one global reset command that clears the entire user section of non-volatile memory except the ID function (see Section 3.9.5.4) and the security level pa “as delivered” conditio

RESET RESULT SEE SECTION

Reset – Sets All the resets of Reset - Sets 3.9.9.1 Reset – Units All the resets of Reset - Units 3.9.9.2 Reset – Atest All the resets of Reset - ATest 3.9.9.3 Reset – Cal All the resets of Reset - Cal 3.9.9.4 Remote Interfaces COM1, COM2 interfaces to default settings. 3.9.2 Remote Communications Remote command format to Classic 3.9.2.3 Level (Security) Reset security level to low 3.9.5.5

ssword (see Section 3.9.5.5) returning RPM4-E-DWT to the

n. The Reset – All resets are itemized in Table 10.

Table 10. Reset – All

4. REMOTE OPERATION

44.

EEMMOOTTEE

PPEERRAATTIIOON

4.1 OVERVIEW

Most of the RPM4-E-DWT front panel functions can also be executed by commands from a remote com puter . The host computer can co mmunicate with the RPM4-E-DWT using the RPM4-E-DWT’s COM1 RS232 port.

Before writing code using RPM4-E-DWT remote commands, familiarize yourself with its operating principles by reviewing Section 3 of this manual.

4.2 INTERFACING

Sending a program message to the RPM4-E-DWT places it into remote mode. The remote indicator to the right of the display window lights when the RPM4-E-DWT is in remote mode. It also flickers when a program message is received. The menus usually accessed from the front panel are locked out while in remote. The [ESC] key returns the RPM4-E-DWT to local operation unless the <REMOTE> program message, which locks out all keypad operation, was sent to the unit.

4.2.1 RS232 INTERFACE

4.2.1.1 COM1

The RPM4-E-DWT COM1 RS232 interface is located on the back of the unit. It is a 9-pin male DB-9F connector config ured as a DCE de vice. D ata is tra nsmitted out o f the unit using pin 2, and is received on pin 3. This allows a normal pin-to-pi n DB-9M to DB-9F RS232 cable to be used to connect to a DTE host.

Handshaking is not required or supported. The COM1 receive buffer is 80 bytes deep. If you overflow the buffer by sending too much data, the data will be lost. Because of this, you must send a single program message at a time and you must wait for the RPM4-E-DWT to reply from the previous command before issuing another command.

Table 11. COM1 pin designations and connections

RPM4-E-DWT COM1 DB-9F PIN DESIGNATIONS

PIN # FUNCTION DESCRIPTION

2 TxD This pin transmits serial data from the RPM4-E-DWT to the

3 RxD This pin accepts serial data from the host computer. 5 Grn This pin is the common return for the TxD and RxD signals.

IBM PC/XT DB-9F

CONNECTIONS

DB-25M DB-9F DB-9M DB-9F

2 3 3 3 3 2 2 2 7 5 5 5

host.

IBM PC/XT DB-9M TO RPM4-E-DWT

DB9F CONNECTION

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

4.2.1.2 COM2

The RPM4-E-DWT COM2 RS232 interface is located on the back of the unit. It can be used to allow the host computer to communicate with another device through the RPM4-E-DWT. This allows the user to use one host COM port to communicate with the RPM4-E-DWT and an additional RS232 device. Refer to the “#” remote program command for details.

COM2 is a 9-pin female DB-9F connector configured as a DTE device. Data is transmitted out of the RPM4-E-DWT using pin 3, and is received on pin 2. This allows a normal pin-to-pin DB-9M to DB-9F RS232 cable to be used to connect to a DCE device.

Handshaking is not required or supported.

Table 12. COM2 DB-9F pin designations

PIN # FUNCTION DESCRIPTION

2 RxD This pin transmits serial data from the RPM4-E-DWT to a

3 TxD This pin accepts serial data from the external device. 4 DTR This pin is Data Terminal Ready (DTR) (held at + 5 V). 5 Grn This pin is the common return for the TxD and RxD signals.

device.

4.3 PROGRAMMING FORMATS

RPM4-E-DWT supports two program message formats, the “classic”, and the “enhanced” formats. The user must select which format to use. Selection can be accomplished from the front panel (see Section

3.9.2.3) or remotely using the “L2” or “L3” program message (see Section 4.4.4). The ”MSGFMT” command can also be used to select the format, but is not recommended for ne w designs.

The main difference between the “classi c” and “enhan ced” form ats is that comman ds that reply a Boole an type reply a ‘0’ or ‘1’ when in enhanced mode. Classic mode includes the original command in the reply.

Many RPM4-E-DWT classic and enhanced commands are common with DHI PPC Pressure/Controller Calibrators.

4.3.1 PROGRAM MESSAGE FORMAT

Each program message sent is also a query. You can only send one program message to the RPM4-E-DWT at time. The command can be followed with an optional query operator “?” if desired, but it is not mandatory. After sending any program message, you must wait for the RPM4-E-DWT to reply before sending another program message. This reply will contain data, or a numeric error message if the program message was invalid. You must wait for this reply before issuing another program message to the RPM4-E-DWT. This insures that the RPM4-E-DWT has completed the program message. Most remote program messages will return a reply within 500 ms except:

“PR?”, “PRR?”, “SR?”, “ATM?”, “RATE?”: Up to 2 seconds. “RPT”, “ARANGE”, “AUTOZERO=RUN”: Up to 3 seconds The syntax and format used for each program message in the classic mode is listed next to

the keyword “Classic”’ in each program message summary in Section 4.4.4. The format for the enha

nced mode is al

so indicated where needed.

4. REMOTE OPERATION

4.3.2 ERROR QUEUE

The RPM4-E-DWT keeps track of remote errors by using an error queue. If an error occurs, the reply to the offending command will be “ERR#nn” where nn is the error code from 0 to 99. The text description of the error is pushed onto the Error Queue. You should always check the reply for an error and handle as needed. The “ERR?” (or “ERR”) query can then be used to pull the error from the Error Queue in it’s descriptive text format. If you are using the enhanced program message format, the Error Queue will accumulate errors until full unless they are pulled from the queue. If you are using the classic program format, the Error Queue is cleared every time a new program message is received

Examples:

• COM1 enhanced mode command: “*CLS” or “*CLS?” (Clear the error queue. Wait for reply) “UNIT KPA” or “UNIT? KPA” (Generates a reply. User must wait for reply

before continuing) “MMODE A” or “MMODE? A” (Generates a reply. User must wait for reply

before continuing) “PR” or “PR?” (Generates a reply. User must wait for reply before continuing)

4.3.2.1 USING QUERY TYPE COMMANDS

The QUERY type of program message just requests data from the RPM4-E-DWT. Placing the query operator “?” immediately after the command is optional. All commands generate a reply that you must wait for and receive before sending the next command. Most queries return a reply within 200 ms except:

“PR?”, “PRR?”, “SR?”, “ATM?”, “RATE?”: Up to 2 seconds. “RPT”, “ARANGE”, “AUTOZERO RUN”: Up to 3 seconds The syntax for using a QUERY program message is listed next to the keyword

“Query:” in each program message summary in Section 4.4.4.

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

4.4 COMMANDS

4.4.1 PROGRAMMING MESSAGES

Some commands accept an optional suffix. This suffix can be used to specify the explicit Q-RPT to address. In most cases, each Q-RPT in the RPM4-E-DWT operates as an independent measurement device. If the suffix is not specified, then the “Active” Q-RPT is assumed.

The “RANGE” or “ARANGE” command can be used to select the “Active” Q-RPT. See the program message descriptions for suffix use with a specific command.

Table 13. Program message list

COMMAND

‘n’ indicates an

optional suffix

# Send a command string out of the RPM4-E-DWT COM2 port. ABORT Stop pending operations. ARANGEn Read or set a new AutoRange to use. ATM Read the current atmospheric pressure (on-board barometer). AUTOZEROn Read or set the status of the AutoZ automatic zeroing function. AUTOZEROn=RUN Run AutoZero. CALAMB Read or set the on-board barometer calibration. COM1 Read or set the configuration of the COM1 port. COM2 Read or set the configuration of the COM2 port. CONTn Enable continuous measurements. DATE Read or set the current date. ERR Read the last error message. HEAD Read or set the fluid head settings. ID Read or set the RPM4-E-DW T alphanumeric asset ID tag. L2 Selects “classic” program message format. L3 Selects “enhanced” program message format. LOCAL Return control to the RPM4-E-DWT front panel. MEM Read the power-up memory test status. MSGFMT Read or set the type of program message format to use. PCALn Read or set the user Lo Q-RPT calibration information. PCAL:XX Read or set the user Lo Q-RPT calibration information (old command). PRn Read the next RPM4-E-DWT pressure. PRRn Read the next RPM4-E-DWT pressure, rate, and ATM. QPRRn Read the last RPM4-E-DWT pressure, rate and ATM. RANGE Select a Q-RPT to be “active” in it’s default full scale range. RATEn Read the next available rate of change of pressure. READRATEn Read or set the Q-RPT measurement read rate and mode. READYCKn Read or set a flag that is cleared by a Not Ready condition. REMOTE Enable remote local lockout operation. RESn Read or set the pressure display resolution for the current Q-RPT and range. RESET Reset the RPM4-E-DWT to default user parameters. RPTn Read the available Q-RPT data. SCRSAV Read or set the front panel screen saver period. SN Read the serial number of the RPM4-E-DWT. SRn Read the next available pressure status (Ready/Not Ready). SSn Read or set the stability required for a Ready condition. SS%n Read or set the stability required for a Ready condition (% span/ s). TIME Read or set the current time of day. UCOEFn Convert a pressure in Pascal to pressure in the current units. UDU Read or set the user defined pressure unit. ULn Read or set the upper limit for the current range. UNITn Read or set the pressure unit of measure for the current range. VER Read the RPM4-E-DWT software version. ZOFFSETn Read or set the AutoZero Z ZOFFSET:XX Read or set the AutoZ Z

offset

DESCRIPTION

for the specified Q-RPT.

offset

for the specified Q-RPT (old command).

4. REMOTE OPERATION

4.4.2 ERROR MESSAGESS

Table 14. Error #s and descriptions

REPLY DESCRIPTION

ERR# 0 “OK” ERR# 2 “Text argument is too long” ERR# 3 “Arguments cannot be 0” ERR# 4 “External device not detected” ERR# 5 Not used ERR# 6 “Numeric argument missing or out of range” ERR# 7 “Missing or improper command argument(s)” ERR# 8 “External device time-out error”

ERR# 9 “Unknown command” ERR# 10 “Missing or invalid command suffix” ERR# 11 “Command missing argument” ERR# 12 “System overpressured” or “overpressure may result” ERR# 13 “Text queue overflow” ERR# 14 “User unit not defined” ERR# 17 Not used ERR# 18 “Command not yet available” ERR# 19 “Not available with absolute units” ERR# 20 “Not available with gauge device” ERR# 21 Not used ERR# 22 “Pressure is not stable” ERR# 23 “Option not available or installed” ERR# 25 Not used ERR# 26 “COM port failed to initialize” ERR# 27 “Internal device failure” ERR# 28 “Device failure” ERR# 29 “Device not available” ERR# 30 “Must be on range HI” ERR# 31 “Exceeds upper or lower limit” ERR# 32 “Not stable enough” ERR# 37 “Data table is full” ERR# 38 “Selected range is not available” ERR# 39 “Data verify error” ERR# 45 “Argument not allowed” ERR #46 “Argument cannot be negative” ERR #52 “Command obsolete” ERR# 53 “Not Available”

E-DWT-10000-AF OPERATION AND MAINTENANCE MANUAL

4.4.3 PROGRAM MESSAGE DESCRIPTION OVERVIEW

Each program message description is separated into the following sections:

Purpose A brief description of the pr ograms message’s function. Command This is the Enhanced program message syntax to send data to the RPM4-E-DWT or to

Quer y This is the Enhanced program message syntax to request data from the RPM4-E-DWT. The

Classic This is the Classic program message syntax to send data to the RPM4-E-DWT, to

Suff ix Some commands support an optional suffix. This suffix is used to specify a Q-RPT to which

Argu ments If the program message can be used to set data inside the RPM4-E-DWT, then this section Default If the program message can be used to set data inside the RPM4-E-DWT, then this line Remarks This field has the details and remarks about the command.

Example Examples are given for the enhanced and classic methods.

Errors If the program message can report an argument error, the types of errors are listed.

See Also Indicates related commands (“----“) and refers to manual sections giving detail on

execute an RPM4-E-DWT function. The RPM4-E-DWT must be set to use the enh anced format (see Section 3.9.2.3) to use the syntax and style shown. It may be sent alone, or followed b can be p assed. I f there a re multiple arguments, then commas must separate them. The RPM4-E-DWT will reply and you must wait for this reply. If this field is not listed in the program message description, then the Command type is not supported when using the Enhanced format.

RPM4-E-DWT must be set to use the enhanced format (see Section 3.9.2.3). The RPM4-E-D another program message. If this field (Query) is not listed in the program message description, then the Query type for the program message is not supported when using the Enhanced format.

execute an RPM4-E-DWT function, or to query for data. The RPM4-E-DWT must be set to use the classic format (see Section 3.9.2.3). The command may be followed by a ‘(=)’ and additional argument characters to show that a mult i pl e a rg u m en t s , then commas must separate them. The RPM4-E-DWT will always reply to a program message. You must wait for this reply before issuing another program message. If this field is not listed in the program message description, then it is not supported when using the classic format.

the command applies, since many settings are Q-RPT spe cific: Suffix of ‘1’ for Hi Q-RPT acce ss Suffix of ‘2’ for Lo Q-RPT acce ss If an optional suffix is allowed but not given, then the “Active Q-RPT” will be addressed. The “Active Q-RPT” is the Q-RPT that is currently displayed on the top line of the front panel of the RPM4-E-DWT, and is identified by the text label in the upper right of the pressure display screen. The last Q-RPT ranged or selected using the “RANGE” or “ARANGE” commands is the “Active” Q-RPT. The “ARANGE”, “RANGE” or “RPT” command query can be used to determine which Q-RPT is currently active.

describes the arguments and their limits. shows (using the enhanced format) the default setting from the factory.

Enhanced: An example of the use of an enhanced format program message to be

Classic: An example of the use of a classic program message to be sent to the

The error message is replied after receiving the program message. The “ERR” or “ERR?” query can be used to retrieve a text description of the error.

RPM4-E-DWT operation corresponding to the program message.

y at least one white space and additional argument(s) to show that arguments

WT will always reply to a query. You must wait for this reply before issuing

sent to the RPM4-E-DWT is shown. The message sent to the RPM4-E-DWT appears after the “Cmd sent:” label. If only a Query type exists, the “Query sent:” label is shown instead. Directly under this label, “Query reply” shows a typical reply to a query type. “Reply:” shows that a query format does not exist. It may have a short description next to it.

RPM4-E-DWT is shown. The command sent to the RPM4-E-DWT appears after the “Cmd sent:” label. The “Reply” label shows a typical reply to the “Sent” example. It may have a short description next to it.

rgument(s) can be passed. If there are

4. REMOTE OPERATION

4.4.4 PROGRAM MESSAGE DESCRIPTIONS

Purpose To allow the host PC to communicate with a device connected to the RPM4-E-DWT Classic

Arguments

Remarks The RPM4-E-DWT COM2 port can be used to communicate to another RS232 device

Example (classic) This example assumes that a second RPM4-E-DWT’s COM1 port is connected to the

DH Instruments E-DWT-10000-AF Operation And Maintenance Manual

Specifications and Main Features

Frequently Asked Questions

User Manual