Fluke RPM4 User Manual

RPM4™

Reference Pressure Monitor

Operation and Maintenance Manual

© 2004-2007 DH Instruments, a Fluke Company

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.

© 2004-2007 DH Instruments, a Fluke Company All rights reserved.

Information in this document is subject to change without notice. No part of this document may be reproduced or transmitted in any form or by any means, electronic or mechanical, for any purpose, without the express written permission of DH Instruments 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, RPM4, QDUT, Q-RPT, RPM4 and SDS are trademarks, registered and otherwise, of DH Instruments

Document No. 550129a-03 050815

Printed in the USA.

© 2004-2007 DH Instruments, a Fluke Company

TABLE OF CONTENTS

TABLE OF CONTENTS

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........................................................................................	2
		1.2.2.1	QUARTZ REFERENCE PRESSURE TRANSDUCER (Q-RPT) ................................................................	2
		1.2.2.2	ON-BOARD BAROMETER ........................................................................................................................	4
		1.2.3	BATTERY AND CHARGER PACK................................................................................................................	5
2.	INSTALLATION ..................................................................			7
	2.1	UNPACKING AND INSPECTION ............................................................................................................		7
		2.1.1	REMOVING FROM PACKAGING..................................................................................................................	7
		2.1.2	INSPECTING CONTENTS.............................................................................................................................	7
	2.2	SITE REQUIREMENTS............................................................................................................................		8
	2.3	SETUP .....................................................................................................................................................		8
		2.3.1	PREPARING FOR OPERATION ...................................................................................................................	8
		2.3.2	FRONT AND REAR PANELS........................................................................................................................	8
		2.3.2.1	FRONT PANEL ..........................................................................................................................................	8
		2.3.2.2	REAR PANEL.............................................................................................................................................	9
		2.3.3	POWER CONNECTION.................................................................................................................................	9
		2.3.3.1	85 TO 264 VAC, 50/60 HZ VAC POWER ..................................................................................................	9
		2.3.3.2	BATTERY PACK ........................................................................................................................................	9
		2.3.4	REMOTE [ENT] CONNECTION (FOOTSWITCH OR OTHER SWITCH)....................................................	10
		2.3.5	CONNECTING TO MEASURE PRESSURE (TEST(+) AND TEST(-) PORTS)...........................................	10
		2.3.6	THE VENT OR ATM PORT..........................................................................................................................	11
		2.3.7	CHECK/SET SECURITY LEVEL.................................................................................................................	11
		2.3.8	TURN OFF ABSOLUTE AND NEGATIVE GAUGE MODE (AXXX RPT)....................................................	12
		2.3.9	SDS FULL TIME OFF ..................................................................................................................................	12
		2.3.10	PARALLEL MEASUREMENT MODE..........................................................................................................	12
	2.4	POWER-UP AND VERIFICATION.........................................................................................................		12
		2.4.1	SWITCH POWER ON ..................................................................................................................................	12
		2.4.2	CHECK PRESSURE MEASUREMENT OPERATION.................................................................................	13
		2.4.2.1	CHECKING ABSOLUTE MODE PRESSURE MEASUREMENT.............................................................	13
		2.4.2.2	CHECKING GAUGE MODE PRESSURE MEASUREMENT...................................................................	13
	2.5	SHORT TERM STORAGE .....................................................................................................................		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
	3.2	GENERAL OPERATING PRINCIPLES .................................................................................................		18
		3.2.1	PRESSURE READY/NOT READY ..............................................................................................................	18

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© 2004-2007 DH Instruments, a Fluke Company

RPM4™ OPERATION AND MAINTENANCE MANUAL

3.2.2GAUGE AND NEGATIVE GAUGE MODES WITH AN AXXX (ABSOLUTE) Q-RPT, DYNAMIC

		COMPENSATION FOR ATMOSPHERIC PRESSURE ...............................................................................	19
	3.2.3	MULTIPE RANGES (Q-RPTS, AUTORANGE AND INFINITE RANGING) .................................................	19
	3.2.4	PARALLEL MEASUREMENT MODE..........................................................................................................	21
	3.2.5	USING RPM4 WITH A PPC3 CONTROLLER/CALIBRATOR.....................................................................	21
	3.2.6	USE OF THE 12VDC BATTERY/CHARGER PACK ...................................................................................	23
	3.2.7	SDS SELF DEFENSE SYSTEM ..................................................................................................................	24
	3.2.8	DIRECT FUNCTION KEYS SUMMARY ......................................................................................................	25
3.3	DIRECT FUNCTION KEYS....................................................................................................................		25
	3.3.1	[RANGE] ......................................................................................................................................................	25
	3.3.2	[UNIT]...........................................................................................................................................................	26
	3.3.3	[MODE] ........................................................................................................................................................	27
	3.3.3.1	DIFFERENTIAL MEASUREMENT MODE OPERATION .........................................................................	29
	3.3.4	[AUTORANGE] ............................................................................................................................................	30
	3.3.5	[LEAK CK] ...................................................................................................................................................	33
	3.3.6	[DISPLAY]....................................................................................................................................................	34
	3.3.6.1	AVG (AVERAGE) .....................................................................................................................................	36
	3.3.6.2	RATE........................................................................................................................................................	37
	3.3.6.3	DEV (DEVIATION) ...................................................................................................................................	38
	3.3.6.4	RPT ..........................................................................................................................................................	39
	3.3.6.5	HI/LO ........................................................................................................................................................	40
	3.3.6.6	FREEZE ...................................................................................................................................................	41
	3.3.6.7	CLEAN .....................................................................................................................................................	41
	3.3.7	[HEAD] .........................................................................................................................................................	42
	3.3.8	[SDS] (SELF DEFENSE SYSTEM) .............................................................................................................	43
	3.3.8.1	SDS IN DIFFERENTIAL AND PARALLEL MEASUREMENT MODES....................................................	46
	3.3.9	[AUTOZ].......................................................................................................................................................	46
	3.3.9.1	[AUTOZ] IN GAUGE AND NEGATIVE GAUGE MODE ...........................................................................	47
	3.3.9.2	[AUTOZ] IN ABSOLUTE MODE...............................................................................................................	48
	3.3.9.3	AUTOZ IN DIFFERENTIAL MODE ..........................................................................................................	51
	3.3.10	[ENT] (RUN AUTOTEST).............................................................................................................................	51
3.4	[SETUP].................................................................................................................................................		52
	3.4.1	<1RANGE> ..................................................................................................................................................	52
	3.4.1.1	SAVING AN AUTORANGE RANGE ........................................................................................................	52
	3.4.1.2	DELETING AUTORANGE RANGES........................................................................................................	53
	3.4.2	<2RES> (RESOLUTION) .............................................................................................................................	53
	3.4.3	<3STAB>......................................................................................................................................................	54
	3.4.4	<4UL> (UPPER LIMIT) ................................................................................................................................	55
	3.4.4.1	OVER PRESSURE FUNCTION ...............................................................................................................	57
	3.4.5	<5ATEST>....................................................................................................................................................	57
3.5	[SPECIAL] .............................................................................................................................................		57
	3.5.1	<1AUTOZ> ...................................................................................................................................................	58
	3.5.1.1	EDIT AUTOZ ............................................................................................................................................	62
	3.5.2	<2REMOTE>................................................................................................................................................	62
	3.5.2.1	<1COM1, 2COM2>...................................................................................................................................	63
	3.5.2.2	<3IEEE-488>............................................................................................................................................	63
	3.5.2.3	<4FORMAT> ............................................................................................................................................	63
	3.5.2.4	<5RS232 SELF-TEST>............................................................................................................................	64
	3.5.3	<3HEAD> .....................................................................................................................................................	64
	3.5.4	<4SDS>........................................................................................................................................................	65
	3.5.4.1	<1TEMP OPEN/CLOSE>.........................................................................................................................	65
	3.5.4.2	<2FULL TIME ON/OFF> ..........................................................................................................................	66
	3.5.5	<5PREFS> ...................................................................................................................................................	66
	3.5.5.1	<1SCRSVR> ............................................................................................................................................	67
	3.5.5.2	<2SOUND> ..............................................................................................................................................	67
	3.5.5.3	<3TIME>...................................................................................................................................................	67
	3.5.5.4	<4ID>........................................................................................................................................................	68
	3.5.5.5	<5LEVEL> (SECURITY)...........................................................................................................................	68
	3.5.6	<6PUNIT>.....................................................................................................................................................	71
	3.5.7	<7INTERNAL> .............................................................................................................................................	73
	3.5.7.1	<1BARO> .................................................................................................................................................	73
	3.5.7.2	<2READRT> ............................................................................................................................................	74
	3.5.7.3	<3RPT2X>................................................................................................................................................	75
	3.5.7.4	<4LO VNT> ..............................................................................................................................................	76
	3.5.7.5	<5LOG>....................................................................................................................................................	77
	3.5.8	<8CAL> ........................................................................................................................................................	77
	3.5.9	<9RESET> ...................................................................................................................................................	78
	3.5.9.1	<1SETS>..................................................................................................................................................	78
	3.5.9.2	<2 UNITS> ...............................................................................................................................................	79
	3.5.9.3	<3ATEST>................................................................................................................................................	79
	3.5.9.4	<4 CAL> ...................................................................................................................................................	79
	3.5.9.5	<5 ALL>....................................................................................................................................................	80

© 2004-2007 DH Instruments, a Fluke Company

Page II

			TABLE OF CONTENTS
4.	REMOTE OPERATION .......................................................			81
	4.1	OVERVIEW ............................................................................................................................................		81
	4.2	INTERFACING.......................................................................................................................................		81
		4.2.1	RS232 INTERFACE .....................................................................................................................................	81
		4.2.1.1	COM1 .......................................................................................................................................................	81
		4.2.1.2	IEEE-488 ..................................................................................................................................................	82
		4.2.1.3	COM2 .......................................................................................................................................................	82
	4.3	PROGRAMMING FORMATS.................................................................................................................		82
		4.3.1 CLASSIC PROGRAM MESSAGE FORMAT ...............................................................................................		83
		4.3.2 ENHANCED PROGRAM MESSAGE FORMAT ..........................................................................................		83
		4.3.2.1	USING COMMAND TYPE COMMANDS .................................................................................................	83
		4.3.2.2 USING QUERY TYPE COMMANDS ...................................................................................................		84
	4.4	COMMANDS..........................................................................................................................................		85
		4.4.1	PROGRAMMING MESSAGES ....................................................................................................................	85
		4.4.2	ERROR MESSAGESS.................................................................................................................................	86
		4.4.3 PROGRAM MESSAGE DESCRIPTION OVERVIEW ..................................................................................		87
		4.4.4	PROGRAM MESSAGE DESCRIPTIONS ....................................................................................................	88
	4.5	STATUS REPORTING SYSTEM .........................................................................................................		108
		4.5.1	ERROR QUEUE.........................................................................................................................................	108
		4.5.2	STATUS BYTE REGISTER .......................................................................................................................	108
		4.5.3	STANDARD EVENT REGISTER ...............................................................................................................	110
		4.5.4	READY STATUS REGISTER ....................................................................................................................	110
	4.6	IEEE STD. 488.2 COMMON AND STATUS PROGRAM MESSAGES................................................		111
		4.6.1	PROGRAM MESSAGE DESCRIPTIONS ..................................................................................................	112
5.	MAINTENANCE, ADJUSTMENTS AND CALIBRATION ................			115
	5.1	OVERVIEW ..........................................................................................................................................		115
	5.2	CALIBRATION OF QUARTZ REFERENCE PRESSURE TRANSDUCERS (Q-RPTS) ......................		115
		5.2.1	PRINCIPLE ................................................................................................................................................	115
		5.2.1.1	PA AND PM COEFFICIENTS ................................................................................................................	116
		5.2.1.2	AS RECEIVED AND AS LEFT DATA ....................................................................................................	116
		5.2.2	EQUIPMENT REQUIRED ..........................................................................................................................	117
		5.2.2.1	GAS OPERATED Q-RPTS, A10M AND LOWER ..................................................................................	117
		5.2.2.2	OIL OR GAS OPERATED Q-RPTS A14M AND HIGHER .....................................................................	117
		5.2.3	SET-UP AND PREPARATION...................................................................................................................	118
		5.2.4 RECOMMENDED CALIBRATION POINT SEQUENCE............................................................................		119
		5.2.4.1	STANDARD CLASS Q-RPTS ................................................................................................................	119
		5.2.4.2	PREMIUM CLASS Q-RPTS ...................................................................................................................	120

5.2.5TURNING OFF ABSOLUTE AND NEGATIVE GAUGE MEASUREMENT MODES FOR AXXX

		(ABSOLUTE) Q-RPTS .........................................................................................................................	122
	5.2.6 Q-RPT CALIBRATION USING CALTOOL FOR RPTS SOFTWARE........................................................		122
	5.2.7 EDITING AND VIEWING Q-RPT CALIBRATION INFORMATION............................................................		122
	5.2.8 Q-RPT CALIBRATION/ADJUSTMENT WITHOUT CALTOOL FOR RPTS SOFTWARE.........................		124
5.3	ADJUSTMENT OF ON-BOARD BAROMETER...................................................................................		125
5.4	RELOADING EMBEDDED SOFTWARE INTO FLASH MEMORY......................................................		126
5.5	SUBASSEMBLY DESCRIPTION AND LOCATION ............................................................................		127
	5.5.1	MINI MICRO BOARD.................................................................................................................................	127
	5.5.2	POWER SUPPLY MODULE ......................................................................................................................	127
	5.5.3	DRIVER BOARD........................................................................................................................................	128
	5.5.4	ON-BOARD BAROMETER........................................................................................................................	128
	5.5.5	Q-RPT MODULE........................................................................................................................................	128
	5.5.5.1	HI Q-RPT MODULE ...............................................................................................................................	128
	5.5.5.2	LO Q-RPT MODULE ..............................................................................................................................	128
	5.5.6	DISPLAY ....................................................................................................................................................	128
5.6	Q-RPT MODULE PNEUMATIC SCHEMATICS ...................................................................................		129

Page III

© 2004-2007 DH Instruments, a Fluke Company

RPM4™ OPERATION AND MAINTENANCE MANUAL

6. TROUBLESHOOTING .......................................................		131
7. APPENDIX ......................................................................		135
7.1	REMOTE [ENT] ...................................................................................................................................	135
7.2	UNIT CONVERSION............................................................................................................................	136
	7.2.1 PRESSURE................................................................................................................................................	136
8. WARRANTY ....................................................................		137
8.1	OVERVIEW ..........................................................................................................................................	137
9. GLOSSARY .....................................................................		139

© 2004-2007 DH Instruments, a Fluke Company

Page IV

	TABLES & FIGURES
TABLES
Table 1. Reference Pressure Transducer (Q-RPT) Module Designations and Ranges .............................		3
Table 2. RPM4 Packing List.........................................................................................................................		7
Table 3. Position Designators of Q-RPTs in an RPM4 System.................................................................		20
Table 4. Settings and What They Are Specific To (Range, Measurement Mode, Q-RPT, System) .........		21
Table 5. Summary of RPM4 Function Key Operation................................................................................		25
Table 6. Settings Made by AutoRange ......................................................................................................		31
Table 7. AutoZ ON and OFF......................................................................................................................		60
Table 8.	Security Levels.............................................................................................................................	70
Table 9.	UNIT Function - Available Units of Measure................................................................................	72
Table 10. READRT - Display Update Rates ..............................................................................................		74
Table 11. Reset – Sets...............................................................................................................................		79
Table 12. Reset – Cal ................................................................................................................................		80
Table 13.	Reset – All..................................................................................................................................	80
Table 14. COM1 Pin Designations and Connections ................................................................................		81
Table 15. COM2 DB-9F Pin Designations .................................................................................................		82
Table 16. Program Message List...............................................................................................................		85
Table 17.	Error #s and Descriptions ..........................................................................................................	86
Table 18.	8 Bit Status Byte Register ........................................................................................................	108
Table 19.	8 Bit Standard Event Register..................................................................................................	110
Table 20.	8 Bit Ready Status Register.....................................................................................................	110
Table 21. Program Message List.............................................................................................................		111
Table 22. Calibration Point Sequence, Standard Class, Axxx and Gxxx Q-RPTs ..................................		119
Table 23. Calibration Point Sequence, Standard Class, BGxxx Q-RPTs................................................		120
Table 24. Calibration Point Sequence, Standard Class, BA100K Q-RPT...............................................		120
Table 25. Calibration Point Sequence, Premium Class, Axxx and Gxxx Q-RPTs ..................................		121
Table 26. Calibration Point Sequence, Premium Class, BGxxx Q-RPTs................................................		121
Table 27.	Troubleshooting Guide.............................................................................................................	131
Table 28.	Pressure Unit of Measure Conversion Coefficients.................................................................	136
Table 29.	DHI Authorized Service Providers ...........................................................................................	137

Page V

© 2004-2007 DH Instruments, a Fluke Company

RPM4™ OPERATION AND MAINTENANCE MANUAL

FIGURES
Figure 1.	Front Panel ...................................................................................................................................	8
Figure 2.	Rear Panel....................................................................................................................................	9
Figure 3. MAIN RUN Screen Display Fields ..............................................................................................		16
Figure 4.	Keypad Layout............................................................................................................................	17
Figure 5.	Battery Pack/Charger .................................................................................................................	23
Figure 6.	Status Register Schematic .......................................................................................................	109
Figure 7.	Internal View .............................................................................................................................	127
Figure 8.	Pneumatic/hydraulic schematics of RPM4 with Single Q-RPT Module ...................................	129
Figure 9.	Pneumatic/hydraulic schematics of RPM4 with Two Q-RPT Modules.....................................	130
Figure 10. Remote [ENT] Connector Schematic .....................................................................................		135

© 2004-2007 DH Instruments, a Fluke Company

Page VI

ABOUT THIS MANUAL

ABOUT THIS MANUAL

This manual is intended to provide the user with the basic information necessary to operate an RPM4 reference pressure monitor. It also includes a great deal of additional information provided to allow you to optimize RPM4 use and take full advantage of its many features and functions.

RPM4-AD is a special air data configuration of RPM4 which has its own dedicated manual, p/n 550148. This manual is for all other configurations of RPM4. If your are using an RPM4-AD (“-AD” in front panel configuration window) use the RPM4-AD Operation and Maintenance Manual p/n 550148.

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 6, 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 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 RPM4. THEN… when you have questions or start to wonder about all the great features you might be missing, get into the manual!

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>).

Page VII

© 2004-2007 DH Instruments, a Fluke Company

RPM4™ OPERATION AND MAINTENANCE MANUAL

NOTES

© 2004-2007 DH Instruments, a Fluke Company

Page VIII

1. INTRODUCTION

1.INTRODUCTION

1.1PRODUCT OVERVIEW

RPM4 is a stand-alone, microprocessor driven, reference pressure monitor intended to precisely measure gas or liquid pressure in a wide variety of pressure calibration, measurement and testing applications. It has been designed to provide very high performance and extensive features combined with maximum versatility and ease of use.

RPM4 uses one or two quartz reference pressure transducer (Q-RPT) modules and, in some cases a barometer, to measure pressure.

RPM4 can be controlled locally by the operator using its front panel display and keypad or remotely by a computer using ASCII character command strings transmitted over its standard RS232 or IEEE-488.2 interface.

RPM4 models are available in ranges from as low as - 3 to 3 kPa (0.4 psi) to as high as 280 MPa (40 000 psi) in absolute, gauge, compound gauge and differential measurement modes.

RPM4 can be integrated into a PPC3 Pressure Controller/Calibrator System to serve the PPC3’s external pressure measuring reference (see the PPC3 Operation and Maintenance Manual).

A special configuration of RPM4 designated RPM4-AD is available for air date (altitude and airspeed) applications. The RPM4-AD model has its own specific manual p/n 550148.

Page 1

© 2004-2007 DH Instruments, a Fluke Company

RPM4™ 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 and 12VDC, 1.2 A

Operating Temperature Range	15 to 35 °C
Storage Temperature Range	- 20 to 70 °C
Vibration	Meets MIL-T-28800D
Ventilation	To prevent product overheating, provide		proper ventilation. Allow 10 cm
	(4 in.) clearance from rear panel cooling fan.
Weight	5 kg (11 lb) approx. (varies slightly with number and type of Q-RPT modules)
Dimensions	10 cm H x 22.7 cm W x 24 cm D (3.9 in. x 9.3 in. x 9.5 in.)
Microprocessors	Motorola 68302, 16 MHz
Communication Ports	RS232 (COM1, COM2), IEEE-488.2
Fuses	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
Pressure Ranges	One or two independent quartz reference pressure transducer (Q-RPT)
	modules cover vacuum to 280 MPa (40 000 psi)
Operating Medium	Any clean, dry, non-corrosive gas or liquid. Q-RPTs less than 7 MPa full scale,
	gas only
Pressure Connections		Q-RPTs up to A70M	Q-RPTs > A70M
	TEST(+):	1/8 in. NPT F	DH500 F
	TEST(-):	1/8 in. NPT F	None
	VENT or ATM:	10-32 UNF (VENT)	10-32 UNF (ATM)

Self Defense System (SDS™)

Pressure Limits

CE Mark

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.

Included on all gas operated Q-RPT modules of A7M or lower. Isolates Q-RPT module TEST(+) port and vents it to atmosphere. SDS is not included with liquid filled Q-RPTs.

Maximum Working Pressure: 104 % Q-RPT maximum Maximum Pressure Without Damage: 125 % Q-RPT maximum

Maximum SDS Protection Pressure: 10 MPa (1 500 psi) Without Damage: 13 MPa (2 000 psi)

Available, must be specified

1.2.2 PRESSURE MEASUREMENT SPECIFICATIONS

1.2.2.1QUARTZ REFERENCE PRESSURE TRANSDUCER (Q-RPT)

RPM4 can be configured with one or two quartz reference pressure transducer (Q-RPT) modules to measure pressure. The type (Axxx, Gxxx, BGxxx, BAxxx) and range of the Q-RPT module(s) determines the RPM4 measurement specifications.

All Q-RPTs whose maximum pressure is over 200 kPa (30 psi) are of the absolute pressure type (Axxx) using an evacuated, permanently sealed reference. Axxx Q-RPTs can measure absolute, gauge and negative gauge pressure. Gauge pressure with an Axxx Q-RPT is defined by offsetting atmospheric pressure and applying dynamic compensation for atmospheric changes using the on-board barometer (see Section 3.2.2). Gxxx (gauge) Q-RPTs can measure positive gauge pressure only. BGxxx (bi-directional gauge) Q-RPTs can measure gauge and negative gauge pressure. See Section 3.3.3 for additional information on absolute, gauge and negative gauge measurement modes.

RPM4s configured with two Q-RPT modules have independent TEST ports and can measure separately. Two Q-RPTs can also be used together to operate in differential mode (see Section 3.3.3.1) and parallel mode (see Section 3.2.4).

© 2004-2007 DH Instruments, a Fluke Company

Page 2

1. INTRODUCTION

Q-RPTs of A10M and lower are available with two different performance levels, STANDARD class and PREMIUM class. See the product label on the RPM4 rear panel, the Q-RPT module label on the rear panel and/or the product calibration reports to determine the class of the Q-RPT(s) installed in RPM4.

Table 1. Reference Pressure Transducer (Q-RPT) Module Designations and Ranges

		SI VERSION					US VERSION
Q-RPT		MAXIMUM			MAXIMUM		MAXIMUM			MAXIMUM
DESIGNATION		RANGE			RANGE		RANGE			RANGE
		[kPa]			[kPa]		[psi]			[psi]
		Absolute			Gauge		Absolute			Gauge
A280M-L1	280 000			280 000			40 000		40 000
A200M-L1	200 000			200 000			30 000		30 000
A140M-L1	140 000			140 000			20 000		20 000
A100M-L1	100 000			100 000			15 000		15 000
A70M1	70 000			70 000			10 000		10 000
A40M1	40 000			40 000			6 000		6 000
A20M1	20 000			20 000			3 000		3 000
A14M1	14 000			14 000			2 000		2 000
A10M1	10 000			10 000			1 500		1 500
A7M1	7 000			7 000			1 000		1 000
A3.5M1	3 500			3 500			500		500
A2M1	2 000			2 000			300		300
A1.4M1	1 400			1 400			200		200
A700K1	700			700			100		100
A350K1	350			250			50		35
A200K1	200			100			30		15
A160K1	160			60			23		8
A100K1	110			10			16		1.5
BA100K4	110			--			16		--
G200K2	--			200			--		30
G100K2	--			100			--		15
G15K2	--			15			--		2.2
BG15K3	--			±15			--		± 2.2

1.All AXXXX RPTs support absolute, gauge and compound (negative) gauge modes.

2.All GXXXX RPTs are positive gauge mode only.

3.BG15K is bi-directional gauge from - 15 to + 15 kPa (- 2.2 to + 2.2 psi).

4.BA100K is a barometric range whose low point is 70 kPa absolute (10 psi).

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© 2004-2007 DH Instruments, a Fluke Company

± 0.013% of reading or 0.0039% of Q-RPT span, whichever is greater 4

± 0.012% of reading or 0.0036% of Q-RPT span, whichever is greater 4

RPM4™ OPERATION AND MAINTENANCE MANUAL

Warm Up Time 30 minute temperature stabilization recommended from cold power up.

Resolution To 1 ppm, user adjustable

Compensated Temperature Range 5 to 35 °C

Acceleration Affect ± 0.008 % /g maximum, worst axis

Allows operation at ± 20° from reference plane without significant effect

Predicted One Year Stability ± 0.005% of reading (all classes and types)1

Q-RPTs UP TO A10M (1500 psi)

	STANDARD CLASS
Precision2	± 0.008% of reading or
	0.0024% of Q-RPT span,
	whichever is greater 4
Measurement Uncertainty3	± 0.01% of reading or 0.0030%
	of Q-RPT span, whichever is
	greater 4

PREMIUM CLASS

±0.005% of reading, 0.0015% of AutoRanged span, or

0.0005% of Q-RPT span, whichever is greater 5

± 0.008 % of reading, 0.0024% of AutoRanged span, or 0.0007% of Q-RPT span, whichever is greater 5

Q-RPTs A14M TO A140M (2 000 to 20 000 psi)

Precision2

Measurement Uncertainty3

Q-RPTs A200M TO A280M (30 000 to 40 000 psi)

Precision2	± 0.015% of reading or 0.0045% of Q-RPT span, whichever is
	greater 4
Measurement Uncertainty3	± 0.018% of reading or 0.0054% of Q-RPT span, whichever is
	greater 4

1.Predicted Q-RPT measurement stability limit (k=2) over one year assuming regular use of AutoZero function. AutoZero occurs automatically in gauge mode whenever vented, by comparison with barometric reference in absolute mode. Absolute mode predicted one year stability without AutoZ is ± (0.005 % Q-RPT span + 0.005 % of reading).

2.Combined linearity, hysteresis, repeatability. Add + 1 Pa (0.00015 psi) in gauge mode with an Axxx (absolute) Q-RPT for the resolution and short term stability of the on-board barometer.

3.Maximum deviation of the Q-RPT indication from the true value of applied pressure including precision, predicted one year stability limit, temperature effect and calibration uncertainty, combined and expanded (k=2) following the ISO “Guide to the Expression of Uncertainty in Measurement.”

4.% of reading value times measured pressure from 100 to 30 % of Q-RPT span. Under 30 % of Q-RPT span, % of reading value times 30 % of Q-RPT span. For example, if the Q-RPT is a Standard A160K, the Measurement Uncertainty in pressure is 0.010% times the measured pressure to 48 kPa (160 kPa span x 30%) and 0.0048 kPa (160 kPa span x 30% x 0.01%) under 48 kPa.

5.% of reading value times measured pressure from 100 to 30 % of AutoRanged span. Under 30% of AutoRanged span, % of reading value times 30% of AutoRanged span. If AutoRanged span is less then 30% of maximum Q-RPT span, % of reading values times measured pressure, or % of reading times 9% of Q-RPT span, whichever is greater. For example, if the Q-RPT is a Premium A160K and AutoRanged span is 160 kPa, the Measurement Uncertainty in pressure is measured pressure x 0.008% to 48 kPa (160 kPa AutoRanged span x 30%) and 0.0038 kPa (160 kPa span x 30% x 0.008%) under 48 kPa. If the AutoRanged span is 100 kPa (greater than 30% of 160 kPa maximum Q-RPT span), the Measurement Uncertainty in pressure is measured pressure x 0.008% to 30 kPa (100 kPa AutoRanged span x 30%) and 0.0025 kPa (100 kPa span x 30% x 0.008%) under 30 kPa. If the AutoRanged span is 30 kPa (less than 30% of the 160 kPa maximum Q-RPT span), the Measurement Uncertainty in pressure is measured pressure x 0.008% to 14.4 kPa (160 kPa maximum Q-RPT span x 9%) and 0.0012 kPa (160 kPa maximum Q-RPT span x 9% x 0.008%) under 14.4 kPa.

1.2.2.2ON-BOARD BAROMETER

The on-board barometer is used only to measure changes in atmospheric pressure to provide dynamic compensation of the Q-RPT’s atmospheric pressure offset when using an Axxx (absolute) Q-RPT to make gauge pressure measurements and for line pressure compensation of G15K and BG15K Q-RPTs.

There is no on-board barometer in RPM4s that have Gxxx (gauge) Q-RPTs only.

© 2004-2007 DH Instruments, a Fluke Company

Page 4

1. INTRODUCTION

1.2.3 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 50 °C
Vibration	Meets MIL-T-28800D
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
	Min:	8200 mAh
Charge Time	Full charge from empty, 14 to 16 hours approx.
Approx. Run Time, Full Charge	8 to 12 hours

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RPM4™ OPERATION AND MAINTENANCE MANUAL

NOTES

© 2004-2007 DH Instruments, a Fluke Company

Page VI

2. INSTALLATION

2.INSTALLATION

2.1UNPACKING AND INSPECTION

2.1.1 REMOVING FROM PACKAGING

RPM4 is delivered in a corrugated container with polyethylene inserts to hold it in place; or in the optional molded, medium density polyethylene shipping case with a custom foam insert for holding the RPM4.

Remove the RPM4 and its accessories from the shipping container and remove each element from its protective plastic bag.

2.1.2 INSPECTING CONTENTS

Check that all items are present and have no visible damage.

A standard RPM4 includes all items indicated in Table 2.

Table 2. RPM4 Packing List

	DESCRIPTION	PART #
1 ea.	RPM4 Reference Pressure Monitor	FAM008
1 ea.	Calibration Report	550100
ACCESSORIES:		401967 (401967-CE)
1 ea.	Operation and Maintenance Manual	550129
1 ea.	Power Cord (7.5 ft.)	100770 (100770-CE)
1 ea.	Ferrite sleeve (snap on to COM2 cable for CE)	103303
1 ea.	General Accessories Disk (white CD)	102987
OPTIONAL BATTERY/CHARGER PACK		401904 (401904-CE)
1 ea.	Battery/charger pack	401980
1 ea.	Battery/charger pack to RPM4 cable	401979
1 ea.	Power Cord (7.5 ft.)	100770 (100770-CE)
1 ea.	Instruction Sheet	560062

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RPM4™ OPERATION AND MAINTENANCE MANUAL

2.2SITE REQUIREMENTS

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. The RPM4 can also be mounted in a standard 19 in. rack mount using the optional rack mount kit.

2.3SETUP

2.3.1 PREPARING FOR OPERATION

To prepare RPM4 for check out and operation:

Remove the plastic caps from the RPM4 rear panel pressure connections.

Remove the protective plastic sheet from the front panel display. Familiarize yourself briefly with the front and rear panels (see Section 2.3.2).

2.3.2 FRONT AND REAR PANELS

2.3.2.1FRONT PANEL

1.	Ready/Not Ready Indicator	4.	Cursor Control Keys
2.	Display	5.	Multi-Function Keypad
3.	Remote Activity Indicator

Figure 1. Front Panel

© 2004-2007 DH Instruments, a Fluke Company

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2. INSTALLATION

2.3.2.2REAR PANEL

1.	12VDC Power Supply	10.	TEST(+) Pressure Port, Lo Q-RPT
	Connection		(if Lo Q-RPT present)
2.	Remote [ENT] Connector	11.	TEST(-) Pressure Port, Lo Q-RPT
3.	IEEE-488 Connector		(if Lo-QRPT present, <A100M only)
4.	COM2 Connector	12.	TEST(+) Pressure Port, Hi Q-RPT
5.	COM1 Connector	13.	TEST(-) Pressure Port, Hi Q-RPT
6.	Power Switch		(<A100M only)
7.	Fuse	14.	VENT (<A10M>) or ATM (>A10M)
8.	Electrical Power Connector		Pressure Port, Lo Q-RPT
	(IEC-320-C13)	15.	VENT or ATM Pressure Port, Hi Q-RPT
9.	Fan	16.	Product Label (bottom of case)

Figure 2. Rear Panel

2.3.3 POWER CONNECTION

2.3.3.185 TO 264 VAC, 50/60 HZ VAC POWER

Check that the RPM4 power switch is OFF.

Connect the supplied power cable to the rear panel power module.

Connect the other end of the power cable to an electrical supply of 85 to 264 VAC, 50/60 Hz.

2.3.3.2BATTERY PACK

Charge the battery pack fully (see Section 3.2.6).

Connect the RPM4 12VDC power connection on the rear panel of the RPM4 to the 12 VDC power connection on the battery/charge pack using the cable supplied with the pack.

See Section 3.2.6 for additional information on battery/charger pack operation and maintenance.

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RPM4™ OPERATION AND MAINTENANCE MANUAL

2.3.4 REMOTE [ENT] CONNECTION (FOOTSWITCH OR OTHER SWITCH)

Connect the optional remote ENTER footswitch, if available or a user supplied switch fitted to the optional cable (see Section 7.1). Connect the cable to the RPM4 rear panel connection labeled REMOTE ENTER. Activating the switch is equivalent to pressing the [ENT] key on the front panel (see Section 3.1.3).

2.3.5 CONNECTING TO MEASURE PRESSURE (TEST(+) AND TEST(-) PORTS)

Using a pressure connecting hose or tube of appropriate pressure rating, connect the device or system to be tested to the RPM4 TEST(+) port.

The RPM4 TEST(+) connection is 1/8 in. NPT female (Q-RPTs of A70M or lower) or DH500 F (Q-RPTs higher than A70M).

DH500 is a gland and collar type fittings for 6.35 mm (1/4 in.) coned and left hand threaded tubes. DH500 is equivalent to AE F250C, HIP HF4, etc.

The TEST(+) and TEST(-) ports on Q-RPT modules of A70M and lower are threaded into the aluminum Q-RPT manifold. Take care in making and breaking fittings not to cross thread or otherwise damage the threads. It is recommended that an adaptor be installed in the in Q-RPT manifold and make break operations be made on the adaptor rather than the manifold.

SDS Self Defense System: Q-RPT modules designated A7M or lower include the SDS Self Defense System. SDS, operated properly, allows a the Q-RPT TEST(+) port to be left connected to a pressure up to 10 MPa (1 500 psi) without damage to the Q-RPT. Do NOT attempt to use SDS in this manner without first becoming thoroughly familiar with its operation and limitations (see Sections 3.2.7, 3.3.8, 3.5.4).

Q-RPT MODULE TEST(+) AND TEST(-) PORTS

Q-RPT modules of A70M and lower have both TEST(+) and TEST(-) ports. Q-RPT modules greater than A70M have a TEST(+) port only. See Section 5.6, Figure 8 for RPM4 Q-RPT module TEST port configurations.

The TEST(+) port is connected to Axxx (absolute) Q-RPTs’ sole measurement port and to the high side of Gxxx or BGxxx (gauge or bi-directional gauge) Q-RPTs.

The TEST(-) port of Axxx and BGxxx Q-RPTs is connected to RPM4’s internal barometer. The TEST(-) is connected to the low side of Gxxx (gauge) or Gxxx (bi-directional gauge) Q-RPTs.

•When operating in absolute mode: The TEST(-) port, if present, is left open to atmosphere.

•When operating in gauge or negative gauge mode with a range greater than 50 kPa (7.5 psi): The TEST(-) port, if present, is normally left open to atmosphere. A possible exception is when the device or system under test is in an ambient pressure that may differ significantly from the ambient pressure around the RPM4. For example, if the RPM4 is measuring the pressure applied to DUTs in an environmental chamber, the pressure in the environmental chamber may be different from ambient pressure around the RPM4. In this

© 2004-2007 DH Instruments, a Fluke Company

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2. INSTALLATION

case, connecting a tube from the TEST(-) port to the inside of the chamber may improve measurement results. If the Q-RPT in use is an Axxx Q-RPT, this tube must be left open to the environment so that the pressure inside cannot deviate too far from ambient. When using an Axxx Q-RPT, if this tube is connected to the low or reference side of DUTs, be sure to open it to the local environment as well.

•When operating in gauge or negative gauge mode with a range less than 50 kPa (7.5 psi): As a general rule, it is preferable to connect the RPM4 TEST(-) port(s) directly to the low or reference side of the device under test to assure that these are at the same pressure. When using an Axxx Q-RPT, this connection must also be open to atmosphere. When using a Gxxx or BGxxx Q-RPT, it is preferable that this connection not be open to atmosphere.

Do not connect a pressure supply to the TEST(-) port. The pressure applied to this port should be maintained at atmospheric pressure (between 70 and 110 kPa (10 and 16 psia)). Exceeding these limits may damage a Gxxx or BGxxx Q-RPT and/or the RPM4’s on-board barometer.

Using the RPM4 with gas operated Q-RPTs connected to a system with liquid contaminants without taking proper precautions to purge the system and test line may cause contamination of the RPM4 that will require non-warranty service.

2.3.6 THE VENT OR ATM PORT

RPM4 Q-RPT modules of A7M and lower have a VENT port. The VENT port is connected to the

TEST(-) port when SDS is CLOSED (see Section 5.6, Figure 8). For Axxx and BGxxx Q-RPTs, the RPM4 on-board barometer, is connected to the VENT port when SDS is CLOSED. The VENT port should always be left completely unobstructed and open to atmosphere.

RPM4 Q-RPT modules of A10M and higher have an ATM port. The ATM port is connected to the RPM4 on-board barometer. The ATM port should always be left completely unobstructed and open to atmosphere.

NEVER plug, obstruct or connect a supply pressure to the RPM4 VENT or ATM port. This may adversely affect GAUGE mode operation and AutoZeroing functions.

2.3.7 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.

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RPM4™ OPERATION AND MAINTENANCE MANUAL

2.3.8 TURN OFF ABSOLUTE AND NEGATIVE GAUGE MODE (AXXX RPT)

If your RPM4 has one or two Axxx (absolute) Q-RPTs, it is able to operate in gauge, negative gauge and absolute measurement modes (see Section 3.3.3). If the RPM4 will be used in gauge mode only, the other measurement modes can be turned off so they are no longer accessible. Turning off modes that are not needed can avoid confusion and/or accidental use of the wrong measurement mode. See Section 5.2.5 for complete information on turning off absolute and negative gauge measurement modes.

Turn off absolute and negative gauge mode if desired.

2.3.9 SDS FULL TIME OFF

Gas operated Q-RPT modules of A7M or less, include the SDS Self Defense System (see Section 3.2.7) to shut off the Q-RPT from the TEST(+) port. If this function is not desired, SDS can be turned full time off so that in regular operation, SDS is not present. With SDS full time off, the SDS overpressure protection is still active.

See Section 3.5.4.2 for instructions on turning SDS full time off if desired.

2.3.10 PARALLEL MEASUREMENT MODE

If your RPM4 has two Q-RPTs of the same type (Axxx, Gxxx, BGxxx), it supports parallel measurement mode in which both RPTs are used simultaneously to measure a common pressure, statistically reducing uncertainty in the measurement. Parallel measurement creates a new Q-RPT, designated <HL>, which is the combination of the Hi and Lo Q-RPTs. See Section 3.2.4 for complete information on parallel measurement mode.

Turn on parallel measurement mode if desired.

2.4POWER-UP AND VERIFICATION

2.4.1 SWITCH POWER ON

Actuate the power switch on the RPM4 rear panel (if a 12 VDC power supply is already connected to the 12 VDC connection, RPM4 power is already on). Observe the front panel display as RPM4 initializes, error checks and goes to the MAIN RUN screen (see Section 3.1.1).

RPM4 default power-up condition is Hi Q-RPT active, SDS closed if present.

If the RPM4 fails to reach the MAIN RUN screen, service is required. Record the sequence of operations and displays observed.

If the RPM4 Q-RPT module is equipped with SDS, SDS is CLOSED at power up and the TEST(+) port is shut off. This causes <SDS CLOSED> to be flash periodically in the main run screen in place of the measured pressure value.

© 2004-2007 DH Instruments, a Fluke Company

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2. INSTALLATION

2.4.2 CHECK PRESSURE MEASUREMENT OPERATION

2.4.2.1CHECKING ABSOLUTE MODE PRESSURE MEASUREMENT

If the RPM4 has an Axxx (absolute) Q-RPT, check that it operates properly in absolute mode.

Make sure that the TEST(+) port is vented to atmosphere.

Use the [RANGE] function key to select the Axxx (absolute) Q-RPT DF range (see Section 3.3.1).

Press the [MODE] function key and select <absolute> mode (see Section 3.3.3). Use [UNIT] to change the pressure unit if desired (see Section 3.3.2).

If SDS is CLOSED (<SDS CLOSED> flashes over the display of pressure on the top line of the display), OPEN SDS. Press [SDS], <2yes> to OPEN SDS (see Section 3.3.8).

Do NOT OPEN SDS with a pressure higher than the maximum pressure of the Q-RPT applied to the TEST(+) port. Damage to the Q-RPT may result.

Observe the current value of atmospheric pressure. Check that the value agrees with the local value of atmospheric pressure within measurement tolerances (see Section 1.2.2.1) Repeat this process for both Axxx (absolute) Q-RPTs if there are two in the RPM4. . If a Q-RPT does not agree within tolerance, it may need to be AutoZeroed (see Section 3.3.9), calibrated (see Section 5.2) or repaired.

2.4.2.2CHECKING GAUGE MODE PRESSURE MEASUREMENT

Make sure that the TEST(+) port is open to atmosphere.

Press the [MODE] function key and select <gauge> mode. Use [UNIT] to change the pressure unit if desired (see Section 3.3.2)..

If SDS is CLOSED (<SDS CLOSED> flashes over the display of pressure on the top line of the display), OPEN SDS. Press [SDS], <2yes> to OPEN SDS.

Do NOT OPEN SDS with a pressure higher than the maximum pressure of the Q-RPT applied to the TEST(+) port. Damage to the Q-RPT may result.

The value indicated should be near zero. It is normal for the Q-RPT to indicate a value other than zero when vented when gauge mode is first entered or the range is changed. 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.

If the display fails to zero properly, RPM4 may need repair.

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RPM4™ OPERATION AND MAINTENANCE MANUAL

2.5SHORT TERM STORAGE

The following is recommended for short term storage of RPM4:

Vent the RPM4 test port

Switch power OFF.

© 2004-2007 DH Instruments, a Fluke Company

Page 14

3. OPERATION

3.OPERATION

3.1USER INTERFACE

RPM4 is designed to offer a balance between simple, straight forward operation and the availability of a wide variety of advanced functions with a high level of operator discretion. The local operator interface is through a 2 x 20 character alphanumeric display, a function/data keypad, a cursor control pad and a

Ready/Not Ready indicator.

Remote communications are by RS232 (COM1) and IEEE-488. See Section 4 for information on remote communication.

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 structures.

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 3 and its legend summarize the RPM4 MAIN RUN screen fields and their functions.

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).

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RPM4™ OPERATION AND MAINTENANCE MANUAL

PRESSURE1UNITM hzRR

DDISPLAYFUNCIONnn/nn

DISPLAY FIELD		NAME	PURPOSE		CONTENTS	SECTION
1.	PRESSURE1	Measured	Displays pressure	Numerical pressure value and sign.		1.2.2.1
		pressure	measured by the	Intermittently flashes <SDS		3.2.7
			active Q-RPT	CLOSED> when the Q-RPT is shut
				off from the TEST(+) port by SDS.
2.	UNIT	Unit of	Identifies unit of	Pressure unit abbreviation		3.3.2
		measure	measure in which
			pressure values are
			displayed
3.	M	Measurement	Identifies	<a>	absolute	3.3.3
		mode	measurement mode	<g>	gauge or negative gauge
			of displayed pressure	<d>	differential
4.	h	Head	Indicates whether a	<h>	the fluid head is not zero	3.3.7
		pressure	fluid head correction	<blank> fluid head is zero
		indicator	is applied to
			PRESSURE1
5.	z	AutoZero	Indicates whether	<z>	AutoZ is ON	3.5.1
		indicator	the AutoZero function	<blank> AutoZ is OFF
			is ON or OFF for the
			active Q-RPT and
			measurement mode
6.	RR	Active	Indicates the position	<Hi>	Hi Q-RPT	3.2.3
		Q-RPT	of the active Q-RPT	<Lo> Lo Q-RPT
		position	in the RPM4	<HL> Hi and Lo Q-RPTs together in
		indicator			parallel measurement mode
				<Hd> Hi and Lo Q-RPTs together in
					differential measurement
					mode
7.	nn/nn	Sequence	Indicates progress of	<NN/NN> Number of this point		3.3.10
		progress	ATest sequence,		over total number of points
		indicator	during test execution		in the sequence
8.	DISPLAY	Information	Pressure indication	Numerical pressure value		3.3.6
	FUNCTION	specific to	depending on current	and sign.
		the DISPLAY	RPM4 DISPLAY	<PPC3 EXT DEV:> when the RPM4
		mode	function. Leading	is initialized as an external device
			character identifies	to a PPC3 pressure controller.
			the value
9.	D	Pressure	Pressure information	<σ>	Display mode is AVERAGE	3.3.6
		information	indicator depending		and value is standard deviation
		indicator	on current RPM4	<R>	Display mode is RATE and
			DISPLAY function.		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
				<Σ, ↑ , ↓ > Display mode is RPT
					and value is measurement
					of inactive RPT
				<F>	Display mode is FREEZE and
					value is last captured reading
				Blank, no character Current
					display mode is CLEAN

Figure 3. MAIN RUN Screen Display Fields

© 2004-2007 DH Instruments, a Fluke Company

Page 16

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 4. 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.

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RPM4™ OPERATION AND MAINTENANCE MANUAL

3.1.3 REMOTE [ENT] (ENTER) FOOTSWITCH

The optional remote ENTER function is a switch that duplicates the function of the front panel [ENT] key. The remote ENTER function is serviced by a connector on the RPM4 rear panel. An optional footswitch is available to activate remote entry hands free or a different switch may be used. See Section 7.1 for information on remote ENTER switch wiring.

The remote ENTER feature can be particularly convenient when running AutoTests (see Section 3.3.10) in which using a footswitch to [ENT] allows hands free operation. It can also be used, with the FREEZE display function (see Section 3.3.6.6) to capture the activation point of a pressure switch.

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	Brief beep. Choice between three frequencies or NO
	sound is available (see Section 3.5.5.2).
Invalid key press	Descending two tone “blurp”
Leak check completed	Three two second beeps (see Section 3.3.5).
Upper or lower limit exceeded	Intermittent one second beeps (see Section 3.4.4).
Pmax! (overpressure limit)	Eight second high frequency beep (see Section 3.4.4.1).
exceeded
Parallel measurement mode	Rapid beeps for 8 seconds (3.2.4).
possible disconnection of the
Hi and Lo Q-RPTs
AutoTest in/out of tolerance	Ascending triad/descending triad (see Section 3.3.10).
reading

3.2GENERAL OPERATING PRINCIPLES

3.2.1 PRESSURE READY/NOT READY

There is a Ready/Not Ready indication LED on the RPM4 front panel. This indication 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). The ready indication is often used when comparing the RPM4 and a test device to indicate when a valid reading can be made.

In RPM4s with two Q-RPTs, the Ready/Not Ready indication always applies to the active Q-RPT, whose pressure measurement is displayed on the top line of the RPM4 display. When the inactive Q-RPT measurement is displayed on the second line using the RPT display mode, the Ready/Not Ready indication for the inactive RPT is indicated by the leading character on the line. <Σ> indicates Ready. < ↑ > or < ↓ > indicate Not Ready, pressure increasing or pressure decreasing.

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.

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3. OPERATION

In differential measurement mode (see Section 3.3.3.1), the LED Ready/Not Ready indication applies to the differential pressures.

In parallel measurement mode (see Section 3.2.4), the LED Ready/Not Ready indication applies to the average pressure read by the <HL> Q-RPT.

When RPM4 is being used as an external measurement reference of a PPC3 pressure controller, the Ready/Not Ready indication is still based on the RPM4 stability and stability limit only. The RPM4’s Ready/Not Ready LED does not indicate whether the PPC3 pressure control is Ready.

3.2.2 GAUGE AND NEGATIVE GAUGE MODES WITH AN AXXX (ABSOLUTE) Q-RPT, DYNAMIC COMPENSATION FOR ATMOSPHERIC PRESSURE

Q-RPTs with the designation Axxx are intrinsically absolute but they are also used for gauge and negative gauge measurement modes (see Section 3.3.3, PRINCIPLE). Gauge measurement

modes are achieved by subtracting the value of atmospheric pressure, Poffset,G, from the Q-RPT’s absolute reading using AutoZ (see Section 3.2.2). The AutoZ routine that measures

Poffset,G, is run by pressing [AutoZ] whenever RPM4 is in the vented condition. This assures the continuous updating of the Poffset,G value corresponding to atmospheric pressure. Gauge pressure is the measured absolute pressure, Pu, minus the atmospheric offset.

Pgauge = Pu - Poffset,G

However, atmospheric pressure may change between opportunities to run AutoZ and update

the value of Poffset,G, for example when running an extended test without venting. RPM4 uses dynamic compensation for atmospheric pressure to correct for changes in atmospheric

pressure between opportunities to run AutoZ and update Poffset,G. When AutoZ runs, and Poffset,G is determined, the reading of RPM4’s on board barometer, Patm,0, is also recorded. Later, when no longer vented, the change in atmospheric pressure, Patm, since Poffset,G was updated, is the difference between the current barometer reading, Patm, and the barometer

reading at the time of AutoZ execution, Patm,0:

Patm = Patm - Patm,0

Dynamic compensation for atmospheric pressure uses	Patm to correct the value of Poffset,G,
thus always compensating real time for changes in atmospheric pressure:
Pgauge = Pu - Poffset,G -	Patm

Gauge pressure measurement on an Axxx (absolute) Q-RPT allows instantaneous switching between gauge and absolute measurements modes. 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 ± 1 Pa (0.00015 psi).

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

An RPM4 may have one or two Q-RPTs. Position indication of the currently active Q-RPT is continuously displayed in the upper right hand corner of the MAIN RUN screen and most other screens. See Table 3 for position designation protocol for the Q-RPTs in an RPM4.

See Table 1 for a complete listing of RPM4/RPM4 Q-RPT choices and their default ranges.

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RPM4™ OPERATION AND MAINTENANCE MANUAL

Table 3. Position Designators of Q-RPTs in an RPM4 System

Q-RPT POSITION		DISPLAY SYMBOL*
Q-RPT with highest maximum pressure,		Hi
installed in HIGH RPT position
Q-RPT with lower maximum pressure in		Lo
dual Q-RPT RPM4, installed in LOW
RPT position.
Two Q-RPTs being used simultaneously		HL
in parallel measurement mode
Hi Q-RPT when used in differential		Hd
measurement mode

*The display symbol is included in the upper, right hand corner of most RPM4 menu displays as a convenient indicator of the active Q-RPT.

An RPM4 may have multiple ranges. Each RPM4 Q-RPT has a default range which is its maximum span. Additional ranges, lower than the Q-RPT’s maximum span, may also be created using AutoRange (see Section 3.3.4). Ranges created using are AutoRange temporary but may be saved with all their settings for reactivation (see Section 3.4.1).

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 and absolute (if available) measurement modes. 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 in current unit of measure in gauge (<g>) and/or absolute (<a>) measurement mode depending on type of Q-RPT and range.

Active A700K DF Hi psi 100g/100a

The ranges available on an RPM4 system 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 4 for a listing of RPM4 adjustments and settings and whether they are range, Q-RPT or system specific.

© 2004-2007 DH Instruments, a Fluke Company

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