Fluke A20M-AF, A70M, HPMS User Manual

RPM4/HPMS A70M/A20M-AF™

Reference Pressure Monitor with

High Pressure Mounting System

Operation and Maintenance Manual

NSN 6685-01-529-6990 RN

(2 of 3)

RPM4/HPMS A70M/A20M-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, GPC1-1000, PGC-1000-AF, RPM4, QDUT, Q-RPT, RPM4 and SDS are trademarks, registered and otherwise, of DH Instruments, a Fluke Company.

Document No. 550136b-01 070627 Printed in the USA

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

1.2.2.1 QUARTZ REFERENCE PRESSURE TRANSDUCERS (Q-RPT)..............................................................3

1.2.2.2 ON-BOARD BAROMETER ........................................................................................................................3

2. INSTALLATION .................................................................. 5

2.1 UNPACKING AND INSPECTION............................................................................................................5

2.1.1 REMOVING FROM PACKAGING .................................................................................................................5

2.1.2 INSPECTING CONTENTS.............................................................................................................................6

2.2 PGC-10000-AF SYSTEM.........................................................................................................................6

2.3 SITE REQUIREMENTS............................................................................................................................7

2.4 SETUP .....................................................................................................................................................8

2.4.1 PREPARING FOR OPERATION...................................................................................................................8

2.4.2 RPM4/HPMS FRONT, REAR AND SIDE VIEWS..........................................................................................8

2.4.2.1 RPM4/HPMS FRONT VIEW ......................................................................................................................8

2.4.2.2 RPM4/HPMS REAR VIEW.........................................................................................................................9

2.4.2.3 RPM4/HPMS SIDE VIEW ........................................................................................................................10

2.4.3 RPM4 FRONT AND REAR PANELS ..........................................................................................................10

2.4.3.1 RPM4 FRONT PANEL .............................................................................................................................10

2.4.3.2 RPM4 REAR PANEL................................................................................................................................11

2.4.4 POWER CONNECTION...............................................................................................................................11

2.4.5 FOOTSWITCH CONNECTION....................................................................................................................11

2.4.6 TEST PORT CONNECTION........................................................................................................................11

2.4.6.1 THE ATM PORTS OF RPM4 ...................................................................................................................12

2.4.7 CHECK/SET SECURITY LEVEL.................................................................................................................12

2.4.8 SETTING UP AUTOTEST FILES ................................................................................................................12

2.5 POWER-UP AND VERIFICATION.........................................................................................................13

2.5.1 SWITCH POWER ON ..................................................................................................................................13

2.5.2 CHECK PRESSURE MEASUREMENT OPERATION ................................................................................13

2.5.2.1 CHECKING ABSOLUTE MODE PRESSURE MEASUREMENT.............................................................13

2.5.2.2 CHECKING GAUGE MODE PRESSURE MEASUREMENT...................................................................13

2.6 SHORT TERM STORAGE.....................................................................................................................14

2.7 LONG TERM STORAGE AND/OR PREPARATION FOR SHIPPING ..................................................14

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

3.1 USER INTERFACE................................................................................................................................15

3.1.1 MAIN RUN SCREEN....................................................................................................................................15

3.1.2 FUNCTION / DATA KEYPAD LAYOUT AND PROTOCOL........................................................................17

3.1.3 REMOTE [ENT] (ENTER) FOOTSWITCH...................................................................................................18

3.1.4 SOUNDS......................................................................................................................................................18

RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL

3.2 GENERAL OPERATING PRINCIPLES.................................................................................................18

3.2.1 PRESSURE READY/NOT READY..............................................................................................................18

3.2.2 GAUGE MODE, DYNAMIC COMPENSATION FOR ATMOSPHERIC PRESSURE ..................................19

3.2.3 MULTIPE RANGES (Q-RPTS, AUTORANGE AND INFINITE RANGING) ................................................19

3.2.4 AUTOMATED TEST AND CALIBRATION SEQUENCES ..........................................................................20

3.2.5 HPMS (HIGH PRESSURE MOUNTING SYSTEM) .....................................................................................20

3.2.6 DIRECT FUNCTION KEYS SUMMARY......................................................................................................24

3.3 DIRECT FUNCTION KEYS....................................................................................................................24

3.3.1 [RANGE]......................................................................................................................................................24

3.3.2 [UNIT]...........................................................................................................................................................26

3.3.3 [MODE] ........................................................................................................................................................27

3.3.4 [AUTORANGE]............................................................................................................................................27

3.3.5 [LEAK CK]...................................................................................................................................................29

3.3.6 [DISPLAY]....................................................................................................................................................31

3.3.6.1 AVG (AVERAGE).....................................................................................................................................32

3.3.6.2 RATE........................................................................................................................................................33

3.3.6.3 DEV (DEVIATION) ...................................................................................................................................34

3.3.6.4 RPT ..........................................................................................................................................................35

3.3.6.5 HI/LO........................................................................................................................................................36

3.3.6.6 FREEZE ...................................................................................................................................................37

3.3.6.7 CLEAN .....................................................................................................................................................37

3.3.7 [HEAD].........................................................................................................................................................38

3.3.8 [SDS]............................................................................................................................................................39

3.3.9 [AUTOZ].......................................................................................................................................................39

3.3.9.1 [AUTOZ] IN GAUGE MODE.....................................................................................................................39

3.3.9.2 [AUTOZ] IN ABSOLUTE MODE...............................................................................................................40

3.3.10 [ENT] (RUN AUTOTEST)............................................................................................................................43

3.3.10.1 AUTOTEST INITIALIZATION...................................................................................................................44

3.3.10.2 TEST EXECUTION ..................................................................................................................................45

3.4 [SETUP].................................................................................................................................................47

3.4.1 <1RANGE> ..................................................................................................................................................47

3.4.1.1 SAVING AN AUTORANGE RANGE ........................................................................................................47

3.4.1.2 DELETING AUTORANGE RANGES .......................................................................................................48

3.4.2 <2RES> (RESOLUTION).............................................................................................................................48

3.4.3 <3STAB>......................................................................................................................................................49

3.4.4 <4UL> (UPPER LIMIT) ................................................................................................................................50

3.4.4.1 OVER PRESSURE FUNCTION...............................................................................................................50

3.4.5 <5ATEST>....................................................................................................................................................51

3.4.5.1 DATA........................................................................................................................................................51

3.4.5.2 FILE..........................................................................................................................................................52

3.5 [SPECIAL] .............................................................................................................................................54

3.5.1 <1AUTOZ>...................................................................................................................................................55

3.5.1.1 EDIT AUTOZ............................................................................................................................................58

3.5.2 <2REMOTE>................................................................................................................................................58

3.5.2.1 <1COM1, 2COM2> ..................................................................................................................................59

3.5.2.2 <3IEEE-488>............................................................................................................................................59

3.5.2.3 <4FORMAT>............................................................................................................................................59

3.5.2.4 <5RS232 SELF-TEST>............................................................................................................................59

3.5.3 <3HEAD>.....................................................................................................................................................60

3.5.4 <4SDS>........................................................................................................................................................60

3.5.5 <5PREFS> ...................................................................................................................................................60

3.5.5.1 <1SCRSVR> ............................................................................................................................................61

3.5.5.2 <2SOUND> ..............................................................................................................................................61

3.5.5.3 <3TIME>...................................................................................................................................................62

3.5.5.4 <4ID>........................................................................................................................................................62

3.5.5.5 <5LEVEL> (SECURITY) ..........................................................................................................................63

3.5.6 <6PUNIT>.....................................................................................................................................................65

3.5.7 <7INTERNAL>.............................................................................................................................................66

3.5.7.1 <1BARO>.................................................................................................................................................67

3.5.7.2 <2READRT> ............................................................................................................................................67

3.5.7.3 <3RPT2X>................................................................................................................................................68

3.5.7.4 <4LO VNT> ..............................................................................................................................................68

3.5.7.5 <5LOG>....................................................................................................................................................68

3.5.8 <8CAL>........................................................................................................................................................69

3.5.9 <9RESET> ...................................................................................................................................................69

3.5.9.1 <1SETS>..................................................................................................................................................69

3.5.9.2 <2 UNITS> ...............................................................................................................................................70

3.5.9.3 <3ATEST>................................................................................................................................................70

3.5.9.4 <4 CAL> ...................................................................................................................................................71

3.5.9.5 <5 ALL>....................................................................................................................................................71

TABLE OF CONTENTS

4. REMOTE OPERATION ....................................................... 73

4.1 OVERVIEW............................................................................................................................................73

4.2 INTERFACING.......................................................................................................................................73

4.2.1 RS232 INTERFACE.....................................................................................................................................73

4.2.1.1 COM1.......................................................................................................................................................73

4.2.1.2 IEEE-488..................................................................................................................................................74

4.2.1.3 COM2.......................................................................................................................................................74

4.3 PROGRAMMING FORMATS.................................................................................................................74

4.3.1 CLASSIC PROGRAM MESSAGE FORMAT ..............................................................................................75

4.3.2 ENHANCED PROGRAM MESSAGE FORMAT..........................................................................................75

4.3.2.1 USING COMMAND TYPE COMMANDS .................................................................................................75

4.3.2.2 USI NG Q U E R Y T Y P E C O M M A N D S...................................................................................................76

4.4 COMMANDS..........................................................................................................................................77

4.4.1 PROGRAMMING MESSAGES....................................................................................................................77

4.4.2 ERROR MESSAGESS.................................................................................................................................78

4.4.3 PROGRAM MESSAGE DESCRIPTION OVERVIEW..................................................................................79

4.4.4 PROGRAM MESSAGE DESCRIPTIONS....................................................................................................80

4.5 STATUS REPORTING SYSTEM...........................................................................................................97

4.5.1 ERROR QUEUE...........................................................................................................................................97

4.5.2 STATUS BYTE REGISTER.........................................................................................................................98

4.5.3 STANDARD EVENT REGISTER.................................................................................................................99

4.5.4 READY STATUS REGISTER....................................................................................................................100

4.6 IEEE STD. 488.2 COMMON AND STATUS PROGRAM MESSAGES ...............................................101

4.6.1 PROGRAM MESSAGE DESCRIPTIONS..................................................................................................101

5. MAINTENANCE, ADJUSTMENTS AND CALIBRATION ..............105

5.1 OVERVIEW..........................................................................................................................................105

5.2 RPM4 MAINTENANCE........................................................................................................................105

5.2.1 AUTOZERO OF Q-RPTS ...........................................................................................................................105

5.2.1.1 GAUGE MODE AUTOZERO..................................................................................................................105

5.2.1.2 ABSOLUTE MODE AUTOZERO ...........................................................................................................106

5.2.2 ADJUSTMENT OF THE ON-BOARD BAROMETER................................................................................106

5.3 RPM4 Q-RPT CALIBRATION..............................................................................................................107

5.3.1 PRINCIPLE ................................................................................................................................................107

5.3.1.1 PA AND PM COEFFICIENTS ................................................................................................................107

5.3.1.2 AS RECEIVED AND AS LEFT DATA ....................................................................................................108

5.3.2 EQUIPMENT REQUIRED..........................................................................................................................108

5.3.3 SET-UP AND PREPARATION ..................................................................................................................109

5.3.4 RECOMMENDED CALIBRATION POINT SEQUENCE ...........................................................................110

5.3.5 TURNING OFF ABSOLUTE MODE CAPABILITY FOR A Q-RPT ...........................................................110

5.3.6 Q-RPT CALIBRATION USING CALTOOL FOR Q-RPTS SOFTWARE...................................................111

5.3.7 EDITING AND VIEWING Q-RPT CALIBRATION INFORMATION...........................................................111

5.3.8 Q-RPT ADJUSTMENT WITHOUT CALTOOL FOR Q-RPTS SOFTWARE..............................................112

5.4 RPM4 REPAIR.....................................................................................................................................114

5.4.1 REMOVING RPM4 FROM HPMS..............................................................................................................114

5.4.2 OPENING AND CLOSING THE RPM4 ENCLOSURE..............................................................................115

5.4.3 RELOADING EMBEDDED SOFTWARE INTO FLASH MEMORY...........................................................115

5.4.4 SUBASSEMBLY DESCRIPTION AND LOCATION..................................................................................116

5.4.4.1 MICRO BOARD......................................................................................................................................116

5.4.4.2 POWER SUPPLY MODULE ..................................................................................................................117

5.4.4.3 DRIVER BOARD....................................................................................................................................117

5.4.4.4 ON-BOARD BAROMETER ....................................................................................................................117

5.4.4.5 Q-RPT MODULE....................................................................................................................................117

5.4.4.6 DISPLAY ................................................................................................................................................117

5.4.4.7 COOLING FAN.......................................................................................................................................118

5.4.5 Q-RPT MODULE PNEUMATIC SCHEMATIC...........................................................................................118

5.5 RPM4 ILLUSTRATED PARTS BREAKDOWN ...................................................................................118

5.6 HPMS MAINTENANCE........................................................................................................................124

5.6.1 HPMS OVERHAUL....................................................................................................................................124

5.7 HPMS ILLUSTRATED PARTS BREAKDOWN...................................................................................125

RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL

6. TROUBLESHOOTING .......................................................129

7. APPENDIX......................................................................133

7.1 UNIT CONVERSION............................................................................................................................133

7.1.1 PRESSURE................................................................................................................................................133

8. WARRANTY ....................................................................135

8.1 OVERVIEW..........................................................................................................................................135

9. GLOSSARY .....................................................................137

TABLES & FIGURES

AABBLLEES

Table 1. RPM4/HPMS A70M/A20M-AF Parts List.......................................................................................6

Table 2. Settings and what they are specific to (range, measurement mode, Q-RPT, system)................20

Table 3. Summary of RPM4 function key operation..................................................................................24

Table 4. Settings made by AutoRange......................................................................................................28

Table 5. AutoZ ON and OFF......................................................................................................................56

Table 6. Security levels.............................................................................................................................. 64

Table 7. UNIT function - available units of measure..................................................................................66

Table 8. READRT - display update rates...................................................................................................68

Table 9. Reset – Sets.................................................................................................................................70

Table 10. Reset – Cal ................................................................................................................................71

Table 11. Reset – All..................................................................................................................................71

Table 12. COM1 pin designations and connections..................................................................................73

Table 13. COM2 DB-9F pin designations..................................................................................................74

Table 14. Program message list ................................................................................................................77

Table 15. Error #s and descriptions...........................................................................................................78

Table 16. 8 Bit status byte register ............................................................................................................98

Table 17. 8 bit standard event register ......................................................................................................99

Table 18. 8 bit ready status register.........................................................................................................100

Table 19. Program message list ..............................................................................................................101

Table 20. Calibration point sequence for A20M and A70M Q-RPTs.......................................................110

Table 21. RPM4 Front Panel Illustrated Parts Breakdown (see Figure 15)............................................118

Table 22. RPM4 Rear Panel Illustrated Parts Breakdown (see Figure 16) ............................................119

Table 23. RPM4 Illustrated Parts Breakdown of Display Assembly (see Figure 17).............................120

Table 24. RPM4 Illustrated Parts Breakdown of Internal Assembly (see Figure 18) ............................121

Table 25. RPM4 Illustrated Parts Breakdown of Internal Assembly (see Figure 19) ............................122

Table 26. RPM4 Illustrated Parts Breakdown of Electronic Chassis (see Figure 20) ...........................123

Table 27. HPMS Assembly Illustrated Parts Breakdown (see Figure 21 and 22)..................................125

Table 28. Troubleshooting guide .............................................................................................................129

Table 29. Pressure unit of measure conversion coefficients ...................................................................133

Table 30. DHI Authorized Service Providers ...........................................................................................135

RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL

IIGGUURREES

Figure 1. Typical PGC-10000-AF installation layout....................................................................................7

Figure 2. RPM4/HPMS front view................................................................................................................8

Figure 3. RPM4/HPMS rear view.................................................................................................................9

Figure 4. RPM4/HPMS side view...............................................................................................................10

Figure 5. RPM4 front panel........................................................................................................................10

Figure 6. RPM4 rear panel......................................................................................................................... 11

Figure 7. MAIN RUN screen display fields.................................................................................................16

Figure 8. Keypad layout.............................................................................................................................17

Figure 9. RPM4/HPMS front view..............................................................................................................22

Figure 10. HPMS pneumatic schematic.....................................................................................................23

Figure 11. Status register schematic .........................................................................................................98

Figure 12. RPM4/HPMS disassembly view .............................................................................................115

Figure 13. RPM4 internal view.................................................................................................................116

Figure 14. Pneumatic schematic of RPM4 Q-RPT Module ......................................................................118

Figure 15. RPM4 Illustrated Parts Breakdown of Front Panel..................................................................118

Figure 16. RPM4 Illustrated Parts Breakdown of Rear Panel...................................................................119

Figure 17. RPM4 Illustrated Parts Breakdown of Display Assembly........................................................120

Figure 18. RPM4 Illustrated Parts Breakdown of Internal Assembly........................................................121

Figure 19. RPM4 Illustrated Parts Breakdown of Internal Assembly........................................................122

Figure 20. RPM4 Illustrated Parts Breakdown of Electronic Chassis.......................................................123

Figure 21. HPMS Schematic.....................................................................................................................126

Figure 22. RPM4/HPMS-AF Assembly.....................................................................................................127

ABOUT THIS MANUAL

BBOOUUTT

This manual is intended to provide the user with the basic information necessary to operate an RPM4/HPMS A70M/A20M reference pressure monitor with high pressure mounting system. 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 familiarize yourself with the Table of Contents structure: Sections 1, 2 and 3 should be read by all first time RPM4 users. Section 3 is most important for those using the local front panel interface but should be read over by all users to familiarize themselves with general RPM4 operating principles. Section 4 is for remote operation from an external computer. Section 5 provides maintenance and calibration information. Section 6 is a quick troubleshooting guide. Use it to troubleshoot unexpected RPM4 behavior based on the symptom of that behavior. Certain words and expressions have specific meaning as they pertain to RPM4. The Glossary, Section 9, is useful as a quick reference for exact definition of specific words and expressions as they are used in the manual.

For those of you who “don’t read manuals”, go directly to Section 2.3 to set up your RPM4/HPMS and then go to Section 2.4 for power-up and verification. 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!

HHIISS

AANNUUAAL

RPM4/HPMS A70M/A20M-AF is usually delivered as part of an PGC-10000-AF system which includes a PGC1-10000-AF pneumatic pressure controller and a GB-152-AF gas booster. The PGC1 and the GB-152 have their own Operation and Maintenance Manuals.

Manual Conventions

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

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

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

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

RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL

OOTTEES

1. INTRODUCTION

11.

NNTTRROODDUUCCTTIIOON

1.1 PRODUCT OVERVIEW

RPM4/HPMS A70M/A20M-AF is the combination of an RPM4 A70M/A20M-AF reference pressure monitor and an HPMS High Pressure Mounting System.

RPM4 A70M/A20M-AF is a stand-alone, microprocessor driven, reference pressure monitor intended to accurately measure gas pressure in a variety of pressure calibration, measurement and testing applications. It has been designed to provide very high performance and extensive features combined with maximum versatility, ease of use and durability. RPM4 A70M/A20M-AF covers the range from 0 to 10 000 psi gauge and atmosphere to 10 000 psi absolute using two high accuracy quartz reference pressure transducers (Q-RPTs) and an on-board barometer to measu re p ressure.

RPM4 A70M/A20M-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 and IEEE-488 interfaces.

RPM4 A70M/A20M-AF uses an AutoRange feature to automatically select the most appropriate Q-RPT and to optimize the RPM4 setup to cover the range.

The HPMS mounts the RPM4 at a convenient viewing angle and contains the hardware to isolate the RPM4’s low pressure Q-RPT (A20M (3 000 psi)) when the high pressure Q-RPT (A70M (10 000 psi) ) is in use.

RPM4/HPMS A70M/A20M-AF is typically delivered as part of a PGC-10000-AF Pneumatic Gauge Calibrator. The PGC-10000-AF system includes a GPC1-10000-AF pneumatic pressure controller and a GB-152-AF gas booster that have their own Operation and Maintenance Manuals.

RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL

1.2 SPECIFICATIONS

1.2.1 GENERAL SPECIFICATIONS

Power Requirements: 85 to 264 VAC, 50/60 Hz, 25 VA max consumption

Operating Temperature Range: 18 to 28 °C

Storage Temperature Range: - 20 to 70 °C

Weight: 11 kg (22 lb) approx.

Dimensions: 23.5 cm H x 29.4 cm W x 37.5 cm D (9.3 in. x 11.6 in. x 14.8 in.)

Communication Ports

Pressure Range: 0 to 10 000 psi (70 MPa) in gauge mode

Operating Medium: Any clean, dry, non-corrosive gas

Pressure Connections: DH500 female

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

PGC-10000-AF SYSTEM

Fuses:

and 12VDC, 1.2 A

RS232 (COM1, COM2), IEEE-488.2 1 A, 250 VAC fuse, 5 x 20 mm, time lag type fuse Internal power supply fuse not replaceable by operator: 2.5A, 250 VAC

Atmosphere to 10 000 psi (70 MPa) in absolute mode

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)

When low Q-RPT is connected to pressure:

Maximum Working Pressure: 3 000 psi (20 MPa) Maximum Pressure Without Damage: 3 600 psi (24 MPa)

Temperature: Operating:

Storage:

Relative Humidity: Operating: 15 to 70%RH (non-condensing)

Storage: 10 to 90%RH (non-condensing)

18 to 28 °C

-20 to 70 °C

1. INTRODUCTION

1.2.2 PRESSURE MEASUREMENT SPECIFICATIONS

1.2.2.1 QUARTZ REFERENCE PRESSURE TRANSDUCERS (Q-RPT)

RPM4 A70M/A20M is configured with two quartz reference pressure transducers (Q-RPT) modules to measure pressure.

The Q-RPTs can measure absolute and gauge pressure. Gauge pressure is defined by offsetting atmospheric pressure and applying dynamic compensation for atmospheric changes using the on-board barometer (see Section 3.2.2).

Warm Up Time 30 minute temperature stabilization recommended from

Compensated Temperature Range 5 to 35 °C

Operating Temperature Range 8 to 28 °C

Maximum Range 3 000 psi (20 MPa)

Resolution

Precision

Predicted Stability

Measurement Uncertainty

1. Combined linearity, hysteresis, repeatability.

2. Predicted Q-RPT measurement stability limit (k=2) over one year assuming regular use of AutoZero function. As stabi lity

can only be predicted and varies from Q-RPT to Q-RPT, stability for a specific Q-RPT should be established from experience.

3. Maximum deviation of the Q-RPT indication from the true value of applied press ure including precision, predicted one year stability, temperature effect and calibration uncertainty (assumes calibr ation reference uncertainty of ±0.005% of reading), combined and expanded (k=2) following the ISO “Guide to the Expression of Uncertainty in Measurement.”.

cold power up.

A20M Q-RPT A70M-QRPT

10 000 psi (70 MPa)

user adjustable to 1 ppm of Q-RPT maximum or 10 ppm

of active AutoRange, whichever is larger,

± 0.0175 % of reading, or

0.13 psi, whichever is larger

± 0.02 % of reading, or

0.15 psi, whichever is larger

± 0.004 of reading

± 0.0175 % of reading, or

0.44 psi, whichever is larger

± 0.02 % of reading, or

0.5 psi whichever is larger

1.2.2.2 ON-BOARD BAROMETER

The measurement uncertainty of the on-board barometer is not significant to RPM4 Q-RPT 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 when in gauge pressure measurement mode (see Section 3.2.2)

Sensor Technology: Micro-machined silicon

Warm Up Time: None required

Resolution: 0.1 Pa (0.000015 psi)

RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL

OOTTEES

2. INSTALLATION

22.

NNSSTTAALLLLAATTIIOON

2.1 UNPACKING AND INSPECTION

RPM4/HPMS A70M/A20M-AF is usually delivered as part of an PGC-10000-AF system which includes a

GPC1-10000-AF gas pressure controller and a GB-152-AF gas booster.

2.1.1 REMOVING FROM PACKAGING

RPM4/HPMS A70M/A20M-AF is delivered, along with its accessories, in a reusable molded plastic, shipping container with polyurethane inserts to hold it in place.

Remove the RPM4/HPMS A70M/A20M-AF and its accessories from the shipping container and remove each element from its protective plastic bag.

Retain the shipping container for repacking the RPM4/HPMS A70M/A20M-AF when it is

shipped for recalibration or repair.

RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL

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 RPM4/HPMS A70M/A20M-AF includes all items listed in Table 1.

Table 1. RPM4/HPMS A70M/A20M-AF Parts List

DESCRIPTION PART NO.

RPM4/HPMS A70M/A20M-AF Reference Pressure Monitor/High Pressure Mounting System

ACCESSORIES:

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

shipment) 1 ea. Foot switch assembly 401613 1 ea. PGC-10000-AF Documentation Disk including:

• RPM4/HPMS A70M/A20M-AF Operation and

Maintenance Manual, p/n 550136

• GPC1-10000-AF Operation and Maintenance Manual, p/n 550135

• GB-152-AF Operation and Maintenance Manual, p/n 550137

1 ea. Calibration Report 550100 1 ea. Test Report (PGC-10000-AF) (if the RPM4/HPMS is

delivered as part of an PGC-10000-AF system) 1 ea. Power cord (7.5 ft) 100770 1 ea. General Accessories Disk (white CD) (Important :

Includes system support software and

documentation)

402192

124198

402189

550138

102987

2.2 PGC-10000-AF SYSTEM

RPM4/HPMS A70M/A20M-AF is usually delivered as the reference pressure measurement component of a PGC-10000-AF Pneumatic Gauge Calibrator. The PGC-10000-AF system includes:

• RPM4/HPMS A70M/A20M-AF: Reference pressure monitor and high pressure mounting system used as the pressure measuring reference of the calibration system.

• GPC1-10000-AF: Gas pressure controller used to set and adjust high pressure gas in the calibration system.

• GB-152-AF: Gas booster package used to supply gas pressure up to 10 000 psi (70 MPa) to the GPC1-10000-AF pressure controller.

2. INSTALLATION

Each of the three components of the PGC-10000-AF system has its own Operation and Maintenance Manual and individual setup and start up instructions. Figure 1 shows the typical setup configuration of a complete PGC-10000-AF system.

RPM4/HPMS A70M/A20M Reference Pressure Monitor

GPC1-10000-AF

CAUTION

GB152-AF

GB152-AF GB152 Setting

GB152 Setting

Drive Air Control Kit

GPC1-10000-AF Gas Pressure Controller

Gas Pressure Controller

GB152 Pressure Generation Component

GB152-AF Gas

GB152 Pressure Generation Component

GB152-AF Gas Booster

Booster

Remote ENTER Footswitch

Figure 1. Typical PGC-10000-AF installation layout

2.3 SITE REQUIREMENTS

The RPM4/HPMS A70M/A20M-AF is usually delivered as part of an PGC-10000-AF pneumatic gauge calibrator. The PGC-10000-AF also includes a GPC1-10000-AF and a GB-152-AF that each have their own Operation and Maintenance Manual. See the GPC1 and GB-152 Operation and Maintenance Manuals for information on their site requirements. Also see Section 2.2 for information on setup of a complete PGC-10000-AF system.

Install RPM4 on a flat, stable surface at a convenient height. The front feet can be extended so that the unit can be inclined for easier viewing. Consider the placement of the FOOT SWITCH which may need to be accessed frequently while running calibrations.

Support facilities required for RPM4/HPMS A70M/A20M-AF include an electrical power source of 85 to 264 VAC, 47 to 440 Hz.

RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL

2.4 SETUP

2.4.1 PREPARING FOR OPERATION

To prepare RPM4 for check out and operation:

Remove the plastic plug from the RPM4/HPMS rear panel TEST connection. Remove the protective plastic sheet from the front panel display. Familiarize yourself briefly with the RPM4 and HPMS front and rear panels (see Sections

2.4.2, 2.4.3).

2.4.2 RPM4/HPMS FRONT, REAR AND SIDE VIEWS

2.4.2.1 RPM4/HPMS FRONT VIEW

1. RPM4 A70M/A2 0M-AF Reference Pressure Monitor

2. Lo Q-RPT shut-off valve position LED

3. Lo Q-RPT shut-off valve

Figure 2. RPM4/HPMS front view

4. Lo Q-RPT active valve position LED

5. Lo Q-RPT active caution LED

2. INSTALLATION

2.4.2.2 RPM4/HPMS REAR VIEW

1. Foot switch (remote [ENT]) cable connector

Figure 3. RPM4/HPMS rear view

2. TEST port (DH500 F)

RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL

2.4.2.3 RPM4/HPMS SIDE VIEW

1. Lo Q-RPT shut off valve

2. RPM4/HPMS A70M/A20M Reference Pressure Monitor

3. Pressure relief valve (3 300 psi)

4. Foot switch (remote [ENT]) cable connector

5. TEST port (DH500 F)

Figure 4. RPM4/HPMS side view

2.4.3 RPM4 FRONT AND REAR PANELS

2.4.3.1 RPM4 FRONT PANEL

1. Ready/Not Ready indicator

2. Display

3. Remote activity indicator

Figure 5. RPM4 front panel

4. Cursor control keys

5. Multi-function keypad

2. INSTALLATION

2.4.3.2 RPM4 REAR PANEL

1. 12VDC Power Supply Connection

2. Accessories connector (to HPMS rear panel FOOTSWITCH and LEDs)

3. IEEE-488 Connector

4. COM2 Connector

5. COM1 Connector

6. Power Switch

7. Fuse

Figure 6. RPM4 rear panel

8. Electrical Power Connector (IEC-320-C13)

9. Fan

10. TEST(+) Pressure Port, Lo Q-RPT

11. TEST(+) Pressure Port, Hi Q-RPT

12. ATM Pressure Port, Lo Q-RPT

13. ATM Pressure Port, Hi Q-RPT

14. Product Label (bottom of case)

2.4.4 POWER CONNECTION

Connect the supplied power cable to the RPM4 rear panel power module. Connect the other end of the power cable to an electrical supply of 85 to 264 VAC,

50/60 Hz.

2.4.5 FOOTSWITCH CONNECTION

Connect the foot switch supplied in the RPM4/HPMS accessories to the HPMS rear panel electrical connection labeled FOOT SWITCH. Place the foot switch on the floor at a convenient location (see Section 2.2, Figure 1). The FOOT SWITCH function is equivalent to the RPM4 front panel [ENT] key and may be used frequently while running tests and calibrations.

2.4.6 TEST PORT CONNECTION

A single high pressure TEST port is provided on the rear panel of the HPMS. 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.

Connection to GPC1 if the RPM4/HPMS is Part of an PGC-10000-AF System

If the RPM4/HPMS was delivered as part of a PGC-10000-AF Pneumatic Gauge Calibrator, a GPC1 Gas Pressure Controller was delivered with it. The GPC1 includes a fittings kit with the necessary fittings to interconnect the RPM4/HPMS and GPC1 as well as instructions on making the connection. See the GPC1-10000-AF manual.

RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL

USE THE CORRECT PRESSURE CONNECTORS: The RPM4/HPMS 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 RPM4/HPMS rear panel test port connects internally to both the RPM4’s 3 000 psi (20 MPa) and 10 000 psi (70 MPa) Q-RPTs. The valve on the front of the HPMS isolates the low pressure Q-RPT when the high pressure Q-RPT is in use. Do not apply pressure to the RPM4/HPMS until you are familiar with its operation and know how to protect the low pressure Q-RPT from overpressure (see Section 3.2.5). FAILURE TO PROTECT THE LOW PRESSURE Q-RPT FROM OVERPRESSURE MAY DESTROY IT. DAMAGE DUE TO Q-RPT OVERPRESSURE IS NOT COVERED BY THE PRODUCT WARRANTY.

2.4.6.1 THE ATM PORTS OF RPM4

The ATM ports on the RPM4 Q-RPT modules are connected to the RPM4’s internal barometer to assure that the RPM4 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 Q-RPT module ATM ports. This may adversely affect GAUGE mode operation and AutoZeroing functions.

2.4.7 CHECK/SET SECURITY LEVEL

RPM4 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 3.5.5.5 for information on the security level system. As part of the RPM4 startup, determine the security level that is appropriate for the RPM4 and set a password if desired.

RPM4 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.

2.4.8 SETTING UP AUTOTEST FILES

RPM4 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 RPM4 set up process (see Section 3.3.10, 3.4.5.2).

2. INSTALLATION

2.5 POWER-UP AND VERIFICATION

2.5.1 SWITCH POWER ON

Actuate the power switch on the RPM4 rear panel. Observe the front panel display as RPM4 initializes, error checks and goes to the MAIN RUN screen (see Section 3.1.1). If the RPM4 fails to reach the main run screen, service is required. Record the sequence of operations and displays observed and contact a DHI Authorized Service Provider (see Section 8, Table 23).

Check that one of the two green Valve Status LEDs on the front panel of the HPMS is lit (the red LED should NOT be ON). If neither of the green LEDs on the HPMS front panel lights, check that the 12 pin circular connector at the rear of the RPM4 itself is properly connected to the ACC. J1 connector.

2.5.2 CHECK PRESSURE MEASUREMENT OPERATION

2.5.2.1 CHECKING ABSOLUTE MODE PRESSURE MEASUREMENT

Let the RPM4 warm up with power ON for approximately 30 minutes. Press [MODE] on the RPM4 and select absolute. If desired, change the

pressure unit of measure using [UNIT] (see Section 3.3.2). Open the RPM4/HPMS TEST port to atmosphere. Put the valve knob in the

HPMS front panel into the Lo Q-RPT Active position. This opens the Lo and Hi Q-RPTs to the HPMS TEST port.

Use [RANGE] (see Section 3.3.1) to select the Lo Q-RPT. Observe the RPM4 indicated pressure. Check that the agreement of the RPM4 indicated value with a calibrated barometer in the same room is ± 0.15 psi. The calibrated barometer must have a measurement uncertainty of ± 0.25% of better.

Use [RANGE] to select the Hi Q-RPT Check that the agreement of the RPM4 indicated value with a calibrated barometer in the same room is ± 0.5 psi.

If a Q-RPT does not agree within tolerance, it may need to be AutoZeroed (see Section 3.3.9), calibrated (see Section 5.3) or repaired.

2.5.2.2 CHECKING GAUGE MODE PRESSURE MEASUREMENT

Let the RPM4 warm up with power ON for at approximately 30 minutes. Open the RPM4/HPMS TEST port to atmosphere. Put the valve knob in the

HPMS front panel into the Lo Q-RPT Active position. This opens the Lo and Hi Q-RPTs to the HPMS TEST port.

Use [RANGE] (see Section 3.3.1) to select the Lo Q-RPT. Press [MODE] on the RPM4 and select gauge. If desired, change the pressure unit of measure using [UNIT] (see Section 3.3.3).

The value indicated should be near zero. Press [AutoZ]. This runs AutoZ to zero the Q-RPT reading (see Section 3.3.9.1). Upon return to the main run screen, observe that the indication of measured pressure has zeroed.

Use [RANGE] to select the Hi Q-RPT and repeat the zeroing process.

If the display fails to zero properly for either Q-RPT, RPM4 may need repair.

RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL

It is normal for RPM4 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 has been OFF for some time or its location has changed.

2.6 SHORT TERM STORAGE

The following is recommended for short term storage of RPM4/HPMS:

• Vent the RPM4/HPMS TEST port.

• Switch the RPM4 power OFF.

2.7 LONG TERM STORAGE AND/OR PREPARATION FOR SHIPPING

The following is recommended for long term storage and or shipping of RPM4/HPMS:

• Plug the HPMS TEST port.

• Place the RPM4/HPMS in a plastic bag.

• Place the RPM4/HPMS in the custom shipping/storage case in which it was delivered.

3. OPERATION

33.

PPEERRAATTIIOON

3.1 USER INTERFACE

RPM4/HPMS 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 local operator interface is through the RPM4 front panel 2 x 20 character alpha-numeric display, a function/data keypad, a cursor control pad, an [ENTER] footswitch and a Ready/Not Ready indicator. Remote communications are also available via RS-232 or IEEE-488 interfaces (see Section 4).

The HPMS mounts the RPM4 at a convenient viewing angle and includes a valve and visual indicators to isolate and protect the RPM4’s 3 000 psi Q-RPT (A20M) when using the 10 000 psi Q-RPT (A70M) (see Section 3.2.5).

3.1.1 MAIN RUN SCREEN

The RPM4 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 st ructures.

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

Figure 7 and its legend summarize the RPM4 MAIN RUN screen fields and their function s.

RPM4 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 3.5.5.1).

RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL

↑

PRESSURE1UNITM hzRR DDISPLAYFUCNIONnn/nn

DISPLAY FIELD NAME PURPOSE CONTENTS SECTION

1. PRESSURE1 Measured pressure

Displays pressure measured by the

Numerical pressure value and sign.

1.2.2.1,

3.3.1

active Q-RPT

2. UNIT Unit of measure

Identifies unit of measure in which

Pressure unit symbol 3.3.2

pressure values are displayed

3. M Measurement mode

Identifies measurement mode

<a> absolute <g> gauge

3.3.3

of displayed pressure

4. h Head pressure indicator

Indicates whether a fluid head correction is applied to

<h> the fluid head is not

zero

<blank> fluid head is zero

3.3.7

PRESSURE1

5. z AutoZero indicator

Indicates whether the AutoZero function

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

3.5.1,

3.3.9 is ON or OFF for the active Q-RPT and measurement mode

6. RR Active Q-RPT position

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

<Hi> Internal Hi <Lo> Internal Lo

3.2.3

indicator

7. nn/nn Sequence progress indicator

8. DISPLAY

FUNCTION

Information specific to the DISPLAY mode

Indicates progress of an ATest sequence, during test execution

Pressure indication depending on current RPM4 DISPLAY function. Leading

<nn/nn> Number of this point

over total number of points in the sequence

Numerical pressure value

and sign.

3.3.10

3.3.6

character identifies the value

9. D Pressure information indicator

Pressure information indicator depending on current RPM4 DISPLAY function.

<σ> Display mode is

AVERAGE and value is standard deviation

<R> Display mode is RATE

3.3.6

and value is pressure rate of change per second

<H> Display mode is HI/LO and

value is high, then low

<D> Display mode is

DEVIATION and value is difference from current target

<),

,↓ > Display mode is Q-

RPT and value is measurement of inactive Q-RPT

<F> Display mode is FREEZE

and value is last captured reading

Blank, no character Current

display mode is CLEAN

Figure 7. MAIN RUN screen display fields

3. OPERATION

3.1.2 FUNCTION / DATA KEYPAD LAYOUT AND PROTOCOL

The RPM4 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

3.1.1). The name of the function is on the bottom half of the key. These keys enter numerical values when editing.

2. The Editing and Execution keys are for starting and suspending command execution, cursor control in menus and editing entries.

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 3.4). The SPECIAL menu is for functions that are not generally used as a part of day to day operation (see Section

3.5). These keys enter numerical values when editing.

Figure 8. Keypad layout

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

Pressing the [ESC] key 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 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.

RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL

3.1.3 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 3.3.10) in which the operator’s hands are not free or attention is on the device under test rather than the RPM4.

3.1.4 SOUNDS

RPM4 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

Invalid key press Change HPMS Lo Q-RPT

shut-off valve setting Leak check completed Upper or lower limit exceeded Pmax! (overpressure limit)

exceeded Hi Q-RPT is selected but Lo

Q-RPT is being pressurized

AutoTest in/out of tolerance reading

Brief beep. Choice between three frequencies or NO sound is available (see Section 3.5.5.2).

Descending two tone “blurp”. Four one second beeps (see Section 3.2.5, 3.3.1).

Three two second beeps (see Section 3.3.5). Intermittent one second beeps (see Section 3. 4.4). Eight second high frequency beep (see Section 3.4.4.1).

Intermittent two second high frequency beep. The audible alarm is combined with flashing of the red, Lo Q-RPT Active LED on the HPMS (see Section 3.2.5, 3.3.1).

Ascending triad/descending triad ( see Section 3.3.10).

3.2 GENERAL OPERATING PRINCIPLES

3.2.1 PRESSURE READY/NOT READY

There is a Ready/Not Ready indicator LED on the RPM4 front panel. 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 3.4.3) and the stability limit can be set automatically by a AutoRange or AutoTest (see Section 3.3.4, 3.3.10). The Ready indication is often used when comparing the RPM4 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.

3. OPERATION

3.2.2 GAUGE MODE, DYNAMIC COMPENSATION FOR ATMOSPHERIC PRESSURE

The RPM4 A70M/A20M-AF Q-RPTs are intrinsically absolute but they are also used for gauge measurement mode (see Section 3.3.3,  PR INCIPLE ). Gauge measurement mode is achieved by subtracting the value of atmospheric pressure, P using AutoZ (see Section 3.2.2). The AutoZ routine that measures P [AutoZ] whenever RPM4 is in the vented condition. This assures the continuous updating of the

value corresponding to atmospheric pressure. Gauge pr e s s u r e is the mea sur ed ab solut e

offset,G

pressure, P

, minus the atmospheric offset, P

gauge

offset,G

= Pu - P

However, atmospheric pressure may change between opportunities to run AutoZ and update the value of P

, for example when running an extended test without venting. RPM4 uses

offset,G

dynamic compensation for atmospheric pressure to correct for changes in atmospheric pressure between opportunities to run AutoZ and update P

is determined, the reading of RPM4’s on board barometer, P

offset,G

Later, when no longer vented, the change in atmospheric pressure, ΔP updated, is the difference between the current barometer reading, P

atm

atm,0

= P

atm

reading at the time of AutoZ execution, P

ΔP

Dynamic compensation for atmospheric pressure uses ΔP thus always compensating real time for changes in atmospheric pressure:

, from the Q-RPT’s absolute reading

offset,G

, is run by pressing

offset,G

. When AutoZ runs, and

offset,G

, is also recorded.

atm,0

, since P

atm

, and the barometer

atm

- P

atm,0

to correct the value of P

atm

offset,G

was

offset,G

gauge

= Pu - P

offset,G

- ΔP

atm

The additional uncertainty in gauge pressure mode due to the dynamic compensation for atmospheric pressure technique is a function of the resolution and short term stability of the on-board barometer, not its absolute measurement uncertainty. This additional uncertainty is completely insignificant in the range of pressure covered by the RPM4 A70M/A20M-AF.

3.2.3 MULTIPE RANGES (Q-RPTS, AUTORANGE AND INFINITE RANGING)

RPM4 A 7 0 M/ A2 0 M- A F has two Quartz Reference Pressure Transducers (Q-RPTs). The A70M (10 000 psi) Q-RPT is designated the Hi Q-RTP. The A20M (3 000 psi) Q-RPT is designated the Lo Q-RTP. Which Q-RPT is currently active is continuously by characters in the upper right hand corner of the MAIN RUN screen and most other screens.

Each RPM4 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 Sect ion 3.3.4 , 3. 3.10). Ranges created using AutoRange are temporary but may be saved with all their settings for reactiv ation (see Se ction 3. 4.1.1).

An RPM4 range is identified by a range screen showing the Q-RPT used by the range, its current unit of measure and its full scale pressure in gauge an d absolute measurement modes. The range screen is:

1. Q-RPT designator.

2. Type of range. DF for the Q-RPT’s default r ange; 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 in gauge (<g>) and/or absolute (<a>) measurement mode.

Active A70M DF Hi psi 10000g/10000a

RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL

The ranges available on the RPM4 are accessed using [RANGE] (see Section 3.3.1) and/or created using [AutoRange] (see Section 3.3.4).

Most settings made in an RPM4 range, such as unit of measure, measurement mode, 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 f or a li sti ng of RPM4 adjustments and settings and whether they are range, Q-RPT or system specific.

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 3.3.2 [MODE] Set pressure measurement mode

[DISPLAY] Set bottom line display function System 3.3.6 [HEAD] Set fluid head correction height, fluid, unit

[AutoZ] Run AutoZ Q-RPT and measurement mode 3.3.9

Resolution Set pressure display resolution Range 3.4.2 Stability Set Ready/Not Ready stability test. Range 3.4.3 Upper Limit (UL) Set upper limit alarm Range and measurement mode 3.4.4 AutoZ AutoZ, ON/OFF, set and view values Q-RPT and measurement mode 3.5.1 Screen Saver,

Sound, Time, ID, Level

Cal Various Q-RPT and barometer calibration

(absolute, gauge)

of measure

Set system user preferences System 3.5.5

functions, including turning off absolute and negative gauge modes

Range 3.3.3

System 3.3.7

Q-RPT or barometer 3.5.8

3.2.4 AUTOMATED TEST AND CALIBRATION SEQUENCES

The RPM4 AutoTest function supports “Quick” and “File” automated calibration sequences. These automatically AutoRange the RPM4, 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 analo g pressure gauges (see Section 3.3.10).

3.2.5 HPMS (HIGH PRESSURE MOUNTING SYSTEM)

The HPMS (high pressure mounting system) holds the RPM4 at a convenient viewing angle and includes a valve and visual indicators to isolate and protect the RPM4’s 2 000 psi (A20M) Q-RPT when using the 10 000 psi (A70M) Q-RPT.

See Figure 10 for an HPMS schematic.  OPERATION Numerical references in this Section refer to Figure 9. In normal use, the operator’s only interaction with the HPMS is to operate the isolation valve

knob to connect and disconnect the Lo Q-RPT from the TEST port. The valve’s operation is prompted by the Valve Position LEDs (2, 4).

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