DH Instruments PPC2 PLUS User manual

©2001 DH Instruments, Inc.
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PPC2+™ Operation and Maintenance Manual
©2001 DH Instruments, Inc.
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© 1998 - 2001 DH Instruments, Inc. 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, Inc. 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 does not constitute an endorsement by DH Instruments of that product. 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.
DH Instruments, DH, DHI, PPC, PPC2, PPC2+, and AutoZ are trademarks, registered and otherwise.
Document No. 550091f
010403
Printed in the USA

PPC2+™ Operation and Maintenance Manual
Page i ©2001 DH Instruments, Inc.
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TABLE OF CONTENTS................................................................................i
TABLES...................................................................................................iv
FIGURES ..................................................................................................v
ABOUT THIS MANUAL ..............................................................................vi
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 REFERENCE PRESSURE TRANSDUCER (RPT) SPECIFICATIONS ..........................................3
1.2.2.2 ON-BOARD BAROMETER.............................................................................................................4
1.2.3 PRESSURE CONTROL SPECIFICATIONS...................................................................................................4
1.2.4 ANALOG INPUT SPECIFICATION................................................................................................................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 INITIAL SETUP ......................................................................................................................................... 8
2.3.1 PREPARING FOR OPERATION....................................................................................................................8
2.3.2 FRONT AND REAR PANELS........................................................................................................................9
2.3.2.1 FRONT PANEL..............................................................................................................................9
2.3.2.2 REAR PANEL ASSEMBLY ..........................................................................................................10
2.3.3 POWER CONNECTION...............................................................................................................................10
2.3.4 CONNECTING TO A PRESSURE SUPPLY (SUPPLY PORT)....................................................................11
2.3.5 CONNECTING A VACUUM PUMP (EXHAUST PORT) ...............................................................................11
2.3.6 CONNECTING TO THE DEVICE UNDER TEST (TEST AND TEST(-) PORTS) ......................................................11
2.3.6.1 INSTALLING THE SPLT ..............................................................................................................12
2.3.7 THE VENT CONNECTION (VENT PORT) ...................................................................................................13
2.3.8 THE ATM REF PASS THROUGH (UNLABELED).......................................................................................13
2.4 POWER-UP AND VERIFICATION.......................................................................................................... 13
2.4.1 SWITCH POWER ON...................................................................................................................................13
2.4.2 CHECK PROPER PRESSURE MEASUREMENT OPERATION..................................................................14
2.4.2.1 CHECKING ABSOLUTE MODE PRESSURE MEASUREMENT..................................................14
2.4.2.2 CHECKING GAUGE MODE PRESSURE MEASUREMENT........................................................14
2.4.3 LEAK CHECK..............................................................................................................................................14
2.4.4 PURGE ........................................................................................................................................................15
2.4.5 CHECK PROPER PRESSURE CONTROL OPERATION............................................................................15
2.5 SHORT TERM STORAGE ...................................................................................................................... 15
3. OPERATION........................................................................................ 17
3.1 GENERAL/MANUAL OPERATION......................................................................................................... 17
3.1.1 MAIN RUN SCREEN....................................................................................................................................17
3.1.2 GENERAL OPERATING PRINCIPLES........................................................................................................18
3.1.2.1 MAIN 4 X 4 KEYPAD LAYOUT AND PROTOCOL.......................................................................18
3.1.2.2 DIRECT PRESSURE CONTROL KEYS.......................................................................................19
3.1.2.3 AUTOMATED PRESSURE CONTROL........................................................................................20
3.1.2.4 PRESSURE READY (<*>)/NOT READY (<↑> OR <↓>)...............................................................22

PPC2+™ Operation and Maintenance Manual
©2001 DH Instruments, Inc. Page ii
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3.1.2.5 MULTIPLE PRESSURE RANGES ...............................................................................................24
3.2 DIRECT FUNCTION KEYS..................................................................................................................... 25
3.2.1 RANGE ........................................................................................................................................................25
3.2.1.1 RANGE SPECIFIC FUNCTIONS AND SETTINGS ......................................................................27
3.2.2 UNIT.............................................................................................................................................................27
3.2.3 CONTROL....................................................................................................................................................29
3.2.3.1 SYSTEM DEFAULT CONTROL PARAMETERS..........................................................................30
3.2.3.2 EXECUTING AUTOMATED PRESSURE CONTROL COMMANDS.............................................30
3.2.4 UPPER LIMIT...............................................................................................................................................33
3.2.4.1 OVERPRESSURE FUNCTION ....................................................................................................34
3.2.5 SEQ..............................................................................................................................................................34
3.2.5.1 SETTING UP/EDITING A QUICK SEQUENCE............................................................................34
3.2.5.2 SETTING UP/EDITING A FILE SEQUENCE................................................................................36
3.2.5.3 RUNNING A SEQUENCE ............................................................................................................36
3.2.6 CUSTOM CONTROL ...................................................................................................................................38
3.2.6.1 TURNING-OFF CUSTOM CONTROL PARAMETERS.................................................................40
3.2.7 HEAD...........................................................................................................................................................40
3.2.8 LEAK CHECK/PURGE ................................................................................................................................41
3.2.8.1 LEAK CHECK/PURGE MENU AND FUNCTIONS FLOW CHART ...............................................42
3.2.8.2 LEAK CHECK SCREEN...............................................................................................................43
3.2.8.3 PURGE FUNCTION.....................................................................................................................44
3.2.8.4 SETTING PRESSURES FOR LEAK CHECK/PURGE FUNCTION ..............................................46
3.2.8.5 TYPICAL USE OF THE LEAK CHECK/PURGE FUNCTION........................................................47
3.2.9 ANALOG......................................................................................................................................................48
3.2.9.1 VIEWING ANALOG MEASUREMENTS.......................................................................................49
3.3 SETUP MENU KEY................................................................................................................................. 49
3.3.1 CONTROLREF.............................................................................................................................................49
3.3.2 RESLTN.......................................................................................................................................................51
3.3.3 SEQUENCE.................................................................................................................................................51
3.3.4 DRIVERS .....................................................................................................................................................55
3.4 SPECIAL MENU KEY ............................................................................................................................. 56
3.4.1 AUTOZ.........................................................................................................................................................56
3.4.1.1 VIEW AUTOZ...............................................................................................................................59
3.4.1.2 EDIT AUTOZ................................................................................................................................60
3.4.1.3 RUN AUTOZ ................................................................................................................................60
3.4.2 HEAD...........................................................................................................................................................64
3.4.3 PRESU.........................................................................................................................................................65
3.4.4 INTERNAL ...................................................................................................................................................66
3.4.4.1 CONFIG.......................................................................................................................................66
3.4.4.2 CAL..............................................................................................................................................67
3.4.4.3 REMOTE......................................................................................................................................67
3.4.4.4 TIME ............................................................................................................................................68
3.4.4.5 RESET.........................................................................................................................................69
3.4.4.6 LEVEL..........................................................................................................................................71
3.4.4.7 ATM .............................................................................................................................................74
3.4.4.8 PURGE ........................................................................................................................................75
3.4.4.9 SCRSAV ......................................................................................................................................75
4. REMOTE OPERATION.......................................................................... 77
4.1 OVERVIEW ............................................................................................................................................. 77
4.2 INTERFACING........................................................................................................................................ 77
4.2.1 RS-232 INTERFACE....................................................................................................................................77
4.2.1.1 COM1...........................................................................................................................................77
4.2.1.2 IEEE-488......................................................................................................................................78
4.2.1.3 COM2...........................................................................................................................................78
4.3 PROGRAMMING FORMATS.................................................................................................................. 79
4.3.1 CLASSIC PROGRAM MESSAGE FORMAT ...............................................................................................79
4.3.2 ENHANCED PROGRAM MESSAGE FORMAT...........................................................................................79
4.3.2.1 ENHANCED PROGRAM MESSAGE USING THE COMMAND TYPE .........................................80
4.3.2.2 ENHANCED PROGRAM MESSAGE USING THE QUERY TYPE ...............................................80
4.4 COMMANDS ........................................................................................................................................... 81
4.4.1 PROGRAM MESSAGES..............................................................................................................................81
4.4.2 ERROR MESSAGES ...................................................................................................................................83

PPC2+™ Operation and Maintenance Manual
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4.4.3 PROGRAM MESSAGE DESCRIPTION OVERVIEW...................................................................................84
4.4.4 PROGRAM MESSAGE DESCRIPTIONS ....................................................................................................85
4.5 STATUS REPORTING SYSTEM .......................................................................................................... 116
4.5.1 ERROR QUEUE.........................................................................................................................................116
4.5.2 STATUS BYTE REGISTER .......................................................................................................................117
4.5.3 STANDARD EVENT REGISTER ...............................................................................................................119
4.5.4 READY STATUS REGISTER.....................................................................................................................120
4.6 IEEE STD. 488.2 COMMON AND STATUS PROGRAM MESSAGES................................................. 120
4.6.1 PROGRAM MESSAGE DESCRIPTIONS ..................................................................................................121
5. MAINTENANCE, ADJUSTMENTS AND CALIBRATION........................... 125
5.1 OVERVIEW ........................................................................................................................................... 125
5.2 CALIBRATION OF REFERENCE PRESSURE TRANSDUCERS........................................................ 126
5.2.1 PRINCIPLE................................................................................................................................................126
5.2.1.1 PA/PM COEFFICIENTS.............................................................................................................127
5.2.1.2 SETTING ZNATERR..................................................................................................................127
5.2.1.3 ORDER OF OPERATIONS........................................................................................................128
5.2.1.4 AS RECEIVED/AS LEFT DATA .................................................................................................128
5.2.2 EQUIPMENT REQUIRED ..........................................................................................................................128
5.2.3 SET-UP AND PREPARATION...................................................................................................................129
5.2.4 RPT CALIBRATION USING CALTOOL FOR RPTS SOFTWARE.............................................................130
5.2.5 EDITING AND VIEWING RPT CALIBRATION INFORMATION.................................................................130
5.2.6 SETTING ZNATERR..................................................................................................................................131
5.2.7 RPT CALIBRATION/ADJUSTMENT WITHOUT CALTOOL FOR RPTS SOFTWARE ..............................132
5.3 ADJUSTMENT OF ON-BOARD BAROMETER.................................................................................... 133
5.4 CALIBRATION OF ANALOG INPUT.................................................................................................... 134
5.4.1 CALIBRATION PRINCIPLE.......................................................................................................................134
5.4.1.1 AUTOMATED INTERNAL CALIBRATION..................................................................................134
5.4.1.2 USER ADJUSTMENT OF ANALOG MEASUREMENT RANGES AND CHANNELS..................135
5.4.2 ADJUSTING ANALOG MEASUREMENT CHANNELS .............................................................................135
5.5 PNEUMATIC CONTROL MODULE CONFIGURATION....................................................................... 136
5.6 OVERHAUL........................................................................................................................................... 138
5.7 RELOADING EMBEDDED SOFTWARE INTO FLASH MEMORY....................................................... 138
5.8 SUBASSEMBLY DESCRIPTION AND LOCATION.............................................................................. 139
5.8.1 INTERNAL VIEW.......................................................................................................................................139
5.8.1.1 ON-BOARD BAROMETER.........................................................................................................140
5.8.1.2 POWER SUPPLY.......................................................................................................................140
5.8.1.3 TRANSDUCER SELECTION MODULE .....................................................................................140
5.8.1.4 DRIVER BOARD........................................................................................................................140
5.8.1.5 MICRO CARD............................................................................................................................140
5.8.1.6 REFERENCE PRESSURE TRANSDUCERS.............................................................................140
5.8.1.7 PNEUMATIC MODULE..............................................................................................................141
6. TROUBLESHOOTING......................................................................... 143
6.1 OVERVIEW ........................................................................................................................................... 143
7. APPENDIX........................................................................................ 149
7.1 DRIVERS............................................................................................................................................... 149
7.2 ANALOG............................................................................................................................................... 151
7.2.1 DETAILED SIGNAL DESCRIPTIONS........................................................................................................151
7.3 UNIT CONVERSION ............................................................................................................................. 152
7.3.1 PRESSURE................................................................................................................................................152
8. WARRANTY STATEMENT................................................................... 153
8.1 OVERVIEW ........................................................................................................................................... 153
9. GLOSSARY....................................................................................... 155

PPC2+™ Operation and Maintenance Manual
©2001 DH Instruments, Inc. Page iv
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Table 1. Reference Pressure Transducer (RPT) Designations and Ranges...........................................3
Table 2. Default Pressure Control Parameters........................................................................................4
Table 3. Analog Input Specifications........................................................................................................5
Table 4. PPC2+ Packing List ...................................................................................................................7
Table 5. PPC2+ Range Identification Summary.....................................................................................25
Table 6. Lo or Hi Reference Transducer Range 1, 2, 3.........................................................................30
Table 7. System Default Control Parameters.........................................................................................39
Table 8. UNIT Function - Available Units...............................................................................................65
Table 9. Security Levels.........................................................................................................................73
Table 10. Pin Designations and Connections ..........................................................................................78
Table 11. List of PPC2+ COM2 DB-9F Pin Designations ........................................................................78
Table 12. Program Message List.............................................................................................................81
Table 13. Error #’s and Descriptions........................................................................................................83
Table 14. 8 Bit Status Byte Register ......................................................................................................117
Table 15. 8 Bit Standard Event Register................................................................................................119
Table 16. 8 Bit Ready Status Register...................................................................................................120
Table 17. Program Message List...........................................................................................................120
Table 18. Troubleshooting Guide...........................................................................................................143
Table 19. Driver Output..........................................................................................................................149
Table 20. External Drivers......................................................................................................................150
Table 21. Analog Port/Signal Descriptions.............................................................................................151
Table 22. Conversion Coefficients .........................................................................................................152
Table 23. Warranty Service Centers......................................................................................................154

PPC2+™ Operation and Maintenance Manual
Page v ©2001 DH Instruments, Inc.
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Figure 1. Front Panel.................................................................................................................................9
Figure 2. Rear Panel Assembly...............................................................................................................10
Figure 3. Keypad Layout.........................................................................................................................18
Figure 4. Direct Pressure Control Keys...................................................................................................19
Figure 5. Static Pressure Control Operation ...........................................................................................21
Figure 6. Dynamic Pressure Control Operation ......................................................................................22
Figure 7. Ready (<*>)/Not Ready (<↑>or <↓>) Static Control Mode......................................................23
Figure 8. Ready (<*>)/Not Ready (<↑>or <↓>) in Dynamic Pressure Control Mode..............................23
Figure 9. Hi and Low RPT Pneumatic Circuit..........................................................................................24
Figure 10. Leak Check/Purge Menu Flow Chart.......................................................................................43
Figure 11. Status Register Schematic.....................................................................................................117
Figure 12. Internal View ..........................................................................................................................139
Figure 13. Pneumatic Module (Schematic) .............................................................................................141
Figure 14. Cable Schematic....................................................................................................................150

PPC2+™ Operation and Maintenance Manual
©2001 DH Instruments, Inc. Page vi
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Manual Conventions
This manual is intended to provide the user with the basic information necessary to operate a PPC2+
pressure controller/calibrator. It also includes a great deal of additional information provided to allow
you to optimize its use 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 PPC2+ 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 PPC2+ 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 PPC2+ behavior based on the symptom of
that behavior.
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Certain words and expressions have specific meaning as they pertain to PPC2+. The Glossary
Section is useful as a quick reference for exact definition of specific words and expressions as they are
used in the manual.
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[ ] indicates direct function keys (e.g., [RANGE]).
< > indicates PPC2+ screen displays (e.g., <1yes>).

PPC2+™ Operation and Maintenance Manual
Page 1 ©2001 DH Instruments, Inc.
 38><9.?->398
1.1 PRODUCT OVERVIEW
PPC2+ is a stand-alone, microprocessor driven, pressure controller/calibrator intended to apply and
measure accurate values of gas pressure for the calibration and testing of pressure
measuring instruments. It has been designed to provide very high performance combined with
maximum versatility and ease of use.
PPC2+ measures pressures using one or two high accuracy reference pressure transducers (RPTs)
and an on-board barometer. Pressures control is achieved by a pneumatic module based on solenoid
valves and differential pressure regulators.
PPC2+ can be controlled locally by the operator using a front panel display, keypad and special
function keys or remotely by a computer using ASCII character command strings over an RS-232 or
IEEE-488 interface.
PPC2+ models are available to measure and control pressure in ranges up to 0 to 1 500 psi
(0 to 10 MPa) in both gauge and absolute measurement modes.

PPC2+™ Operation and Maintenance Manual
©2001 DH Instruments, Inc. Page 2
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1.2 SPECIFICATIONS
1.2.1 GENERAL SPECIFICATIONS
Power Requirements: 85 to 264 VAC, 50/60 Hz, 30 VA max consumption
Operating Temperature Range: 15 to 35 °C
Storage Temperature Range: -20 to 70 °C
Vibration: Meets MIL-T-28800D
Weight: 12.8 kg (28.2 lb)
Dimensions: 7.1 in. H x 12.6 in. W x 15.8 in. D (18 cm x 32 cm x 40 cm)
Microprocessor: Motorola 68302, 16 MHz
Communication Ports: RS-232 (COM1), RS-232 (COM2), IEEE-488
Pressure Ranges: Up to six pressure ranges from 0 to 5 psi (33 kPa) to 0 to 1 500 psi
(10 000 kPa) using one or two reference pressure transducers and a
barometer
Operating Medium: Any clean, dry, non-corrosive gas
Pressure Connections: Supply: 1/8 in. NPT F
Test(+): 1/4 in. NPT F
Test(-): 1/4 in. NPT F (with gauge RPT only)
Vent: 1/4 in. NPT F
Exhaust: 1/4 in. NPT F
Atm Ref: Pass through
Pressure Limits: Maximum Working Test Pressure: Range H3+5 %
Maximum Test Pressure without Damage: Range H3+10 %
Recommended Supply Pressure: Range H3+10 %
Maximum Supply Pressure without Damage:
If Range H3>1 000 psi (7 000 kPa): 2 000 psi (14 000 kPa)
If 300 psi (2 000 kPa) <Range H3
1 000 psi (7 000 kPa): 1 400 psi (9 600 kPa)
If Range H3 300 psi (2 000 kPa): 500 psi (3 500 kPa)
1.2.2 PRESSURE MEASUREMENT SPECIFICATIONS
PPC2+ measures pressures in gauge and absolute mode in up to six ranges using one
(<3 ranges>) or two (<6 ranges>) Reference Pressure Transducers (RPTs) and a barometer.
All RPTs with ranges over 30 psi (200 kPa) are of the absolute pressure type using an
evacuated, permanently sealed reference. Absolute RPTs can measure both absolute and
gauge pressure. Gauge pressures with an absolute RPTs are defined by offsetting
atmospheric pressure with dynamic compensation for atmospheric changes using the on-
board barometer. Gauge RPTs cannot measure absolute pressure.

PPC2+™ Operation and Maintenance Manual
Page 3 ©2001 DH Instruments, Inc.

Table 1. Reference Pressure Transducer (RPT) Designations and Ranges
1.2.2.1 REFERENCE PRESSURE TRANSDUCER (RPT) SPECIFICATIONS
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Warm Up Time: None required
Resolution: To 1 ppm, user settable by individual range
Temperature Effect: Fully compensated with active independent temperature
measurement from -20 to 100 °C
± 0.005 % maximum temperature effect in normal ambient
15 to 35°C operating range
Acceleration Affect: ± 0.008 % /g maximum, worst axis
Allows operation at ± 20° from reference plane without
significant effect
Precision
1
: ± 0.005 %
Stability: 90 day 1 year
Gauge Mode (w/Autozero): 0.003 % 0.009 %
Absolute Mode (w/Autozero): 0.003 % 0.009 %
Absolute Mode (w/out Autozero): 0.006 % 0.015 %
Measurement Accuracy
2
: 90 day 1 year
Gauge Mode (w/Autozero): 0.008 % 0.012 %
Absolute Mode (w/Autozero): 0.008 % 0.012 %
Absolute Mode (w/out Autozero): 0.010 % 0.017 %
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1Measurement Precision: Combined linearity, hysteresis, repeatability of measurements made
by the reference pressure transducer.
2 Measurement Accuracy: Maximum deviation of the reference pressure transducer indication
from the true value of measured pressure including precision, stability, temperature effect and
calibration standard accuracy of ± 0.0035 % of reading.

NOTE: When using an absolute reference pressure transducer for gauge mode measurements in
a gauge range of < 30 psi (200 kPa), add ± 0.001 psi (8 Pa) to the measurement specification to
take into account the resolution of the on-board barometer.

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©2001 DH Instruments, Inc. Page 4
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1.2.2.2 ON-BOARD BAROMETER
The barometric sensor is NOT used as a source of absolute accuracy. It is used
ONLY to measure changes in atmospheric pressure to provide dynamic
compensation of the RPTs atmospheric pressure offset when using an absolute RPT
to make gauge pressure measurements.
1.2.3 PRESSURE CONTROL SPECIFICATIONS
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Modes and Ready (<*>)
Indication:
Static: Sets pressure within hold limit and stops active
control until hold limit is exceeded
Pressure is Ready (<*>) when within hold limit and
stability test is met
Dynamic: Sets pressure within hold limit and continuously
adjusts as close as possible to target
Pressure is Ready (<*>) when within hold limit
Control Parameters:
Hold limit, stability limit (optimum values set by default, can be
customized independently for each measurement range)
Table 2. Default Pressure Control Parameters
Lo REFERENCE TRANSDUCER
RANGE 1, 2, 3 Hi REFERENCE TRANSDUCER RANGE 1, 2, 3
HOLD LIMIT STABILITY LIMIT HOLD LIMIT STABILITY LIMIT
STATIC
MODE
± 1 % FS of the active
pressure range ± 0.005 % FS/sec of the active
pressure range
± 1 % FS of the
active pressure
range
± 0.005 % FS/sec
of the active
pressure range.
DYNAMIC
MODE
± 0.005 % FS of the
active pressure range
or ± 2 ppm of range H3,
whichever is larger
± 0.005 % of the
active pressure
range
± 0.005 % FS of
the active pressure
range
± 0.005 % FS of
the active pressure
range

PPC2+™ Operation and Maintenance Manual
Page 5 ©2001 DH Instruments, Inc.


Control Precision
1
:
± 0.001 % (with 30:1 maximum ratio between highest and lowest
range)
Normal Test Volume:
Lo (max range <300 psi): 100 to 1 000 cc (500 cc optimal)
Hi (max range 300 psi): 0 to 500 cc (250 cc optimal)
Control Speed:
Slew Rate (0 to Controller FS)
in Optimal Volume with No Control: 10 to 30 seconds
Pressure Setting (Typical Time To
Ready (<*>) Indication in
Dynamic Mode): 20 to 30 seconds (lower for
low, higher for high ranges)
Reduced by increasing hold
limit
Minimum Control Pressure: Gauge Mode: None when EXHAUST at vacuum
Absolute Mode: 0.2 % FS of range H3, will also set zero absolute
(see Section 3.2.3.1).
Delivered Pressure Accuracy
2
: 90 day 1 year
Gauge Mode: 0.010 % 0.013 %
Absolute Mode (w/Autozero): 0.010 % 0.013 %
Absolute Mode (w/out Autozero): 0.012 % 0.018 %

1 Control Precision: Minimum useable hold limit in dynamic control mode.
2 Delivered Pressure Accuracy: Maximum deviation from the true value of pressure applied to the
device under test in dynamic control mode with default control limits and assuming measurement
accuracy as in Section 1.2.2.1. In static control mode, control errors can be eliminated making
accuracy of delivered pressure the same as measurement accuracy.

1.2.4 ANALOG INPUT SPECIFICATION
Table 3. Analog Input Specifications
MEASUREMENT
RANGE DISPLAY RESOLUTION A/D RESOLUTION ACCURACY (+/- % FS)
0 to 100 mV 0.001 0.014 0.05
0 to 5 V 0.001 0.7 0.03
0 to 10 V 0.001 0.14 0.03
4 to 20 mA 0.001 0.003 0.05
24 V Power Source: Four channels, each output independently can sink 250 mA at 24 V, but
maximum output of all four channels must not exceed 250 mA.

PPC2+™ Operation and Maintenance Manual
©2001 DH Instruments, Inc. Page 6
8
89
9> >/ /= =


PPC2+™ Operation and Maintenance Manual
Page 7 ©2001 DH Instruments, Inc.
 38=>+66+>398
2.1 UNPACKING AND INSPECTION
2.1.1 REMOVING FROM PACKAGING
PPC2+ is delivered in a custom corrugated container with high density 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 PPC2+ and SPLT (if included).
Remove the PPC2+ 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 PPC2+ includes all items indicated in Table 4.
Table 4. PPC2+ Packing List
DESCRIPTION PART NO.
PPC2+ Pressure Controller/Calibrator FAM0002
Calibration Certificate 550100
Test Report 550103
Accessories: 401357 or 401357-CE
Operation and Maintenance Manual 550091
Power Cord (7.5 ft.) 100770 or 100770-CE
(6) Rubber Feet Caps 400203
General Accessories Disk (Important: Includes
system support software and documentation.) 102987

PPC2+™ Operation and Maintenance Manual
©2001 DH Instruments, Inc. Page 8

2.2 SITE REQUIREMENTS
The PPC2+ can be installed on any flat, stable surface at a convenient height. The front feet can be
extended so that the unit can be inclined slightly for easier viewing. The PPC2+ can also be mounted
in a standard 19-in. rack mount using the optional rack mount kit.
Minimizing the length of tubing connecting the PPC2+ to the device or system to be tested will
enhance control performance and reduce pressure setting times.
Ready access to the PPC2+ rear panel should be considered to facilitate making and breaking
pressure connections.
The Self Purging Liquid Trap (SPLT), if used, should be mounted vertically at the low point of the
pneumatic system
.
Support facilities required include:
• An electrical power source of 85 to 264 VAC, 47 to 440 Hz.
• A continuous regulated pressure supply of clean, dry, non-corrosive gas at maximum PPC2+
range (H3) +10 % to be connected to the SUPPLY port. Lower gas pressure supply can be used
but should exceed the maximum desired test output pressure by 10 to 20 %.
• A vacuum source of less than 1 psia (7 kPa) and with displacement of at least 3 cfm (90 lm) if
control of pressures under 3 psi (20 kPa) gauge is desired.
2.3 INITIAL SETUP
2.3.1 PREPARING FOR OPERATION
To prepare PPC2+ for check out and operation:
• Remove the plastic caps from the PPC2+ rear panel pressure connections.
• Remove the protective plastic sheet from the front panel display.
• Install the rubber feet caps onto the bottom case feet, if desired.
• Familiarize yourself briefly with the front and rear panel (see Section 2.3.2).

PPC2+™ Operation and Maintenance Manual
Page 9 ©2001 DH Instruments, Inc.

2.3.2 FRONT AND REAR PANELS
2.3.2.1 FRONT PANEL
The front panel assembly provides a 2 x 20 vacuum fluorescent display of PPC2+
operating status and a membrane keypad for local user control.
1. Multi-Function Keypad 3. Remote Indicator
2. Direct Pressure Control Keys 4. Display
Figure 1. Front Panel
2
3
4

PPC2+™ Operation and Maintenance Manual
©2001 DH Instruments, Inc. Page 10

2.3.2.2 REAR PANEL ASSEMBLY
The rear panel assembly provides pressure connections, communications interfaces,
the power ON/OFF module and product labeling. Pressure fittings are internally
secured to prevent loosening when making and breaking connections.
1. Label, Product 9. Fuse
2. Pressure Connection, SUPPLY 10. Pressure Connection, TEST
3. Analog Option Connector 11. Pressure Connection, TEST(-)
4. Drivers Option Connector (models with gauge RPT only)
5. IEEE-488 Connector 12. Pressure Connection, EXHAUST
6. COM1 Connector 13. Pass Through, ATM REF
7. COM2 Connector 14. Pressure Connection, VENT
8. Power Switch
Figure 2. Rear Panel Assembly
2.3.3 POWER CONNECTION
• Check that the PPC2+ 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,
47 to 440 Hz.
5
10
11
12
6
7
8
9
13
14

PPC2+™ Operation and Maintenance Manual
Page 11 ©2001 DH Instruments, Inc.

2.3.4 CONNECTING TO A PRESSURE SUPPLY (SUPPLY PORT)
Using a pressure connecting hose of appropriate pressure rating, connect the pressure supply
to the SUPPLY connection on the rear panel of PPC2+. The PPC2+ SUPPLY connection is
1/8 in. NPT female.
The supply pressure should be equal to the maximum PPC2+ range +10 %. Lower gas
pressure sources can be used but should exceed the maximum desired test output pressure
by 10 to 20 %.
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For PPC2+ to set pressures under atmosphere and/or to reliably set pressure under
3 psi (20 kPa) gauge other than zero gauge, a vacuum pump must be connected to the
EXHAUST port.
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2.3.6 CONNECTINGTOTHEDEVICEUNDERTEST(TEST ANDTEST(-) PORTS)
If you are using a SPLT, see Section 2.3.6.1 before proceeding to connect the device
under test.
Using a pressure connecting hose of appropriate pressure rating, connect the device or
system to be tested to the TEST port of the PPC2+. The PPC2+ TEST connection is
1/4 in. NPT female.
If PPC2+ is equipped with a gauge RPT (GXXXX), it has a TEST port and a TEST(-) port.
The TEST(-) port is connected to the low side of the gauge RPT. This connection is normally
left open to atmosphere. It can also be connected to the low side of a differential device that
is being calibrated or tested. With very low pressure devices, this will enhance the calibration
results by helping assure that PPC2+ and device under test reference ports are at the
same pressure.

PPC2+™ Operation and Maintenance Manual
©2001 DH Instruments, Inc. Page 12

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2.3.6.1 INSTALLING THE SPLT
The SPLT (optional) is intended to collect and exhaust liquid that may be present in
the device or system under test so that they do not return to contaminate the PPC2+.
The SPLT is installed in the test connection line at a low point between PPC2+ and
the device or system under test. See the SPLT manual for more complete
instructions on SPLT installation.