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DH Instruments BG0002 Operation And Maintenance Manual

Pressure controller/calibrator
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PPC2+ BG0002
Operation and Maintenance Manual
(Use with PPC2+ Operation
and Maintenance Manual)
©2001 DH Instruments, Inc.

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Summary of Contents for DH Instruments BG0002

  • Page 1 PPC2+ BG0002 Operation and Maintenance Manual (Use with PPC2+ Operation and Maintenance Manual) ©2001 DH Instruments, Inc.
  • Page 2 PPC2+ BG0002 Operation and Maintenance Manual High pressure liquids and gases are potentially hazardous. Energy stored in these liquids and gases can be released unexpectedly and with extreme force. High pressure systems should be assembled and operated only by personnel who have been instructed in proper safety practices.

  • Page 3: Table Of Contents

    PPC2+ BG0002 Operation and Maintenance Manual TABLE OF CONTENTS ................i TABLES ....................iii FIGURES ....................iii ABOUT THIS MANUAL ................iv 1. INTRODUCTION ..................1 PRODUCT OVERVIEW..........................1 SPECIFICATIONS............................. 2 1.2.1 GENERAL SPECIFICATIONS........................2 1.2.2 PRESSURE MEASUREMENT SPECIFICATIONS..................2 1.2.3...
  • Page 4 PPC2+ BG0002 Operation and Maintenance Manual 5. MAINTENANCE, ADJUSTMENTS AND CALIBRATION ......19 CALIBRATION OF REFERENCE PRESSURE TRANSDUCERS ............19 5.1.1 PRINCIPLE ..............................19 5.1.2 EQUIPMENT REQUIRED ..........................20 5.1.3 SET-UP AND PREPARATION ........................20 ADJUSTMENT OF ON-BOARD BAROMETER..................21 PNEUMATIC CONTROL MODULE CONFIGURATION .................
  • Page 5 PPC2+ BG0002 Operation and Maintenance Manual Table 1. Default Pressure Control Parameters ..................3 Table 2. PPC2+ Packing List ........................5 Table 3. System Default Control Limits....................11 Table 4. Troubleshooting Guide......................25 Figure 1. Pneumatic Module (Schematic) ....................23 Page iii ©2001 DH Instruments, Inc.

  • Page 6: About This Manual

    Manual (Document Number 550091). It contains information specific to the BG0002 model of PPC2+ Pressure Controller/Calibrator. PPC2+ BG0002 is identical in conception and most features to other PPC2+ models. PPC2+ BG0002 is a specialized PPC2+ model designed to optimize very low gauge pressure performance.

  • Page 7: Introduction

    This package is delivered with its own instruction sheet. Once a PPC2+ BG0002 has been put into service, its operation is identical to other PPC2+ models. This manual is intended to be used as a supplement to the PPC2+ Operation and Maintenance Manual (Document Number 550091).

  • Page 8: Specifications

    PPC2+ BG0002 Operation and Maintenance Manual 1.2 SPECIFICATIONS 1.2.1 GENERAL SPECIFICATIONS Specifications below are specific to PPC2+ BG0002. All other specifications are identical to PPC2+ specifications found in the PPC2+ Operation and Maintenance Manual (Document Number 550091). Weight: 12.8 kg (28.2 lb)

  • Page 9: Pressure Control Specifications

    All values are ± span of the active range unless otherwise indicated. Control specifications assume that a PK-PPC-BG-DVU dual volume unit is installed on the TEST lines and that a vacuum is applied to the PPC2+ BG0002 EXHAUST port. Modes and Ready...
  • Page 10 PPC2+ BG0002 Operation and Maintenance Manual Page 4 ©2001 DH Instruments, Inc.

  • Page 11: Installation

    2.1.1 REMOVING FROM PACKAGING PPC2+ BG0002 is delivered in a custom corrugated container with high density polyethylene inserts to hold it in place; or in the optional molded polyethylene shipping case with a custom foam insert for holding the PPC2+ and SPLT (if included).

  • Page 12: Site Requirements

    The PPC2+ BG0002 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+ BG0002 can also be mounted in a standard 19-in. rack mount using the optional rack mount kit.

  • Page 13: Power Connection

    OFF. This is because when a supply pressure is applied to the PPC2+ BG0002 SUPPLY port and the PPC2+ BG0002 is NOT in the vent ON condition, there is a constant gas exhaust through the PPC2+ BG0002 EXHAUST port to which the vacuum source will be connected.

  • Page 14: Connecting To The Device Under Test (Test(+) And Test(-) Ports)

    Section 2.3.5.1 and the SPLT Operation and Maintenance Manual before proceeding to connect to the device or system under test. The recommended tubing for PPC2+ BG0002 test port connections is 1/4 in. (6 mm) PFA tubing or any other large internal diameter tubing that will not restrict the flow between the PPC2+ and the system under test.

  • Page 15: Installing The Splt

    2.3.6 THE VENT CONNECTION (VENT PORT) The PPC2+ BG0002 VENT port is the system vent to atmosphere point. Though a pressure tube can be connected to the VENT port to direct the vented gas flow, a completely unobstructed connection to atmosphere must be maintained for PPC2+ reference pressure measurements to operate normally.
  • Page 16 PPC2+ BG0002 Operation and Maintenance Manual Page 10 ©2001 DH Instruments, Inc.

  • Page 17: Operation

    If no upper limit value is entered by the user, the upper and lower limit for each PPC2+ BG0002 range is set by default to +102 % of each range for the upper limit and –102 % of each range for the lower limit.

  • Page 18: Overpressure Function

    3.3.1 OVERPRESSURE FUNCTION In addition to the UL function, PPC2+ BG0002 has an overpressure function. This function executes when the measured pressure is greater than +15.75 kPa or less than -17.5 kP ( 2.3 psi).

  • Page 19: Special Menu Key

    It may also be controlled manually using [SPECIAL], <5valve>, <1bypass> (see Section 3.5.2.1). The TEST(-) vent valve is used to open the TEST(-) port of the PPC2+ BG0002 to atmosphere which also connects the BG0002 RPT and the device or system under test low side to atmosphere.

  • Page 20: Bypass

    PURPOSE To operate the PPC2+ BG0002 TEST(-) vent valve locally (see Section 3.5.2 PRINCIPLE and Figure 1). m m m m OPERATION The normal setting for the TEST(-) vent valve is <1auto> in which PPC2+ BG0002 automatically controls valve...

  • Page 21: Internal, Atm

    Select <2open> to cause the TEST(-) valve to open and remain open regardless of PPC2+ BG0002 operation until the <2TEST(-)vent> setting is changed. If PPC2+ BG0002 detects a condition in which it determines there could be a risk of overpressure to the RPT by opening the TEST(-) vent valve, the message <Cannot open lo vent, DP overpressure risk>...
  • Page 22 PPC2+ BG0002 Operation and Maintenance Manual Page 16 ©2001 DH Instruments, Inc.

  • Page 23: Remote Operation

    PPC2+ BG0002 Operation and Maintenance Manual 4. R EMOTE PERATION 4.1 OVERVIEW PPC2+ BG0002 remote operation and protocol is identical to other PPC2+ models (see PPC2+ Operation and Maintenance Manual, Section 4). Page 17 ©2001 DH Instruments, Inc.
  • Page 24 PPC2+ BG0002 Operation and Maintenance Manual Page 18 ©2001 DH Instruments, Inc.

  • Page 25: Maintenance, Adjustments And Calibration

    TRANSDUCERS 5.1.1 PRINCIPLE The principles of calibrating a BG0002 RPT are the same as other PPC2+ RPTs (see PPC2+ Operation and Maintenance Manual, Section 5). When calibrating the PPC2+ BG0002, the following should be considered: For best results, the TEST(-) port of the BG0002 should be connected to an equivalent port of the standard being used for calibration.

  • Page 26: Equipment Required

    OFF. 2. Connect the calibration standard output to the PPC2+ BG0002 rear panel TEST(+) port (1/4 in. NPT F). Connect the calibration standard low or (-) side to the PPC2+ BG0002 rear panel TEST(-) port (1/4 in. NPT F).

  • Page 27: Adjustment Of On-Board Barometer

    (see the PPC2+ Operation and Maintenance Manual). The on-board barometer is a low accuracy sensor. In PPC2+ BG0002 it is used to measure the pressure on the TEST(-) side of the BG0002 RPT. This measurement is used to compensate the BG0002 RPT differential pressure readings for static or line pressure.
  • Page 28 PPC2+ will then pulse and set pressures around mid scale pressure (near zero for PPC2+ BG0002), and "CFG" will flash in the lower right corner of the display. After about ten minutes, the user will be asked whether or not to save the new configurations. If the Config function ran completely and without incident, select <1Yes>.

  • Page 29: Subassembly Description And Location

    PPC2+ BG0002 Operation and Maintenance Manual 5.4 SUBASSEMBLY DESCRIPTION AND LOCATION See PPC2+ Operation and Maintenance Manual for complete information. See Figure 1 for PPC2+ BG0002 pneumatic schematic. BAROMETER TEST ( ) TEST ( ) VENT BYPASS VENT VENT TEST (+)
  • Page 30 PPC2+ BG0002 Operation and Maintenance Manual Page 24 ©2001 DH Instruments, Inc.

  • Page 31: Troubleshooting

    PPC2+ BG0002 Operation and Maintenance Manual 6. T ROUBLESHOOTING 6.1 OVERVIEW See the PPC2+ Operation and Maintenance Manual, Section 6 for general PPC2+ troubleshooting advice. The table below covers troubleshooting specific to the PPC2+ BG0002 model. Table 4. Troubleshooting Guide...
  • Page 32 PPC2+ BG0002 Operation and Maintenance Manual Page 26 ©2001 DH Instruments, Inc.

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