User manual FLUKE BG0002

[. . . ] PPC2+ BG0002 Operation and Maintenance Manual (Use with PPC2+ Operation and Maintenance Manual) ©2001 DH Instruments, Inc. 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. © 2001 DH Instruments, Inc. 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. [. . . ] 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 7 ©2001 DH Instruments, Inc. PPC2+ BG0002 Operation and Maintenance Manual 2. 3. 5 CONNECTING TO THE DEVICE UNDER TEST (TEST(+) AND TEST(-) PORTS) To achieve in tolerance pressure control, PPC2+ BG0002 should be used with the PK-PPC-BGDVU dual volume unit installed in line on both the TEST(+) and TEST(-) ports. In some cases, the PK-PPC-BG-DVU volumes may be omitted if the volume of each side (high and low) of the system under test exceeds 800 cc. Install the PK-PPC-BG-DVU dual volume unit in-line between the PPC2+ BG0002 TEST(+) and TEST(-) ports and the high and low ports of the system or devices under test. If you are using an SPLT, see the PPC2+ Operation and Maintenance Manual, 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. For optimal performance it is important that both the TEST(+) and TEST(-) ports of the PPC2+ be connected to the high and low or positive and negative ports of the device or system under test. If no connection is available on the low or negative side of the device or system under test, operation is possible but pressure control and measurement may be adversely affected by instability of ambient pressure in the environment in which the PPC2+ BG0002 is being operated. The pressure applied to this port should be maintained between 80 and 110 kPa (11. 6 and 16 psia) (roughly atmospheric pressure ± 15 kPa (2. 2 psi) depending on your location. Operating the PPC2+ BG0002 connected to a system with liquid contaminants without taking proper precautions to purge the system and test line may cause contamination of the PPC2+ BG0002 that will require non-warranty service. Minimizing the length of the test connection tubing will enhance control performance and reduce pressure setting time. For normal operation, the total volume of each side (high and low) of the device or system under test (not including the PK-PPC-BG-DVU accessory volumes) should be between 0 and 1 000 cc (60 in3). PPC2+ BG0002 pressure control will not operate properly if there are excessive leaks in the test system. In general, the maximum acceptable leak rate for optimal PPC2+ automated pressure control operation and to assure in tolerance measurements with default pressure control parameters is ± 1 % of active span FS/minute. In DYNAMIC CONTROL mode, to handle higher test system leak rates, increase the hold limit using CUSTOM CONTROL (see the PPC2+ Operation and Maintenance Manual, Section 3. 2. 6). ©2001 DH Instruments, Inc. Page 8 PPC2+ BG0002 Operation and Maintenance Manual PPC2+ BG0002 pressure control may be adversely affected if the test connection tubing is too restrictive. For optimum results, the inner diameter of the connecting hose should be at least 2. 5 mm (0. 1 in. ). For optimum pressure measurement and control, the PPC2+ BG0002 TEST(-) port should be connected to the system or device under test low or negative port. 2. 3. 5. 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+. With PPC2+ BG0002, the SPLT is installed in the TEST(+) line between the PK-PPCBG-DVU and the system or device under test. No SPLT is needed in the TEST(-) line as there should be no flow in the TEST(-) circuit. Also see the SPLT Operation and Maintenance Manual. 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. NEVER plug, obstruct or connect a supply pressure to the PPC2+ vent connection. 2. 3. 7 THE ATM REF PASS THROUGH (UNLABELED) PPC2+ BG0002 does not have an ATM REF pass through. The on-board barometer is connected to the TEST(-) circuit to measure the pressure on the low side of the RPT (see Figure 1). Page 9 ©2001 DH Instruments, Inc. PPC2+ BG0002 Operation and Maintenance Manual N O T ES ©2001 DH Instruments, Inc. Page 10 PPC2+ BG0002 Operation and Maintenance Manual 3. [. . . ] If the PPC2+BG0002 is used to control pressure without the accessory volume, the configuration function should be used to adapt pressure control to the different volume. m OPERATION Poor control is usually caused by invalid control parameters excessive leaks, restrictions in the test line and/or other set up problems. These issues should be identified and eliminated before resorting to use of the configuration function (see Section 6). Page 21 ©2001 DH Instruments, Inc. PPC2+ BG0002 Operation and Maintenance Manual To access the Config function press [SPECIAL] and select <4Internal>, <1Config>. The display is: Selecting <2Defaults> will cause PPC2+ to reload the factory default control coefficients. [. . . ]