Fluke PPCH - V1.01 Operation And Maintenance Manual

The ranges available on a PPCH system are accessed using [RANGE] (see Section 3.3.1) and/or created using [AutoRange] (see Section 3.3.4). External Q-RPTs connected to the PPCH (see Section 3.2.5) are initialized using [RPT] (see Section 3.3.5). Table 7. Settings and to what they are specific (range, measurement mode, Q-RPT, system) SETTING PURPOSE SPECIFIC TO SECTION Unit Set pressure unit of measure Range 3.3.2 Mode Set pressure measurement mode (absolute, gauge) Range 3.3.3 Resolution Set pressure display resolution Range 3.4.2 ...

Page 99 © 2009 DH Instruments, a Fluke Company 4.3.1 CLASSIC PROGRAM MESSAGE FORMAT The classic program message format is compatible with the PPC3 program message set. However, several PPC3 functions are not supported by PPCH and neither are their corresponding commands (these include “AUTOVAC”, “AUTOPURGE”, “CONFIG”, “NVENT”, “VAC”, “TOUT”, and “VALVE”). The classic format is recommended if you need downward compatibility with older DHI controllers or if you are not going to use the IEEE 488.2 status system. Each program message sent is also ...

© 2009 DH Instruments, a Fluke Company Page 64 3.4 [SETUP]  PURPOSE [SETUP] accesses a menu of functions and features commonly used in setting up and using PPCH.  OPERATION To access the SETUP menu, press [SETUP] from the MAIN RUN screen. The display is: 1range 2res 3jog 4UL 5ATest 6control 7drv SETUP menu choices include: <1range> Save and delete ranges created by AutoRange (see Section 3.4.1). <2res> Adjust the resolution of pressure displays (see Section 3.4.2). <3jog> Adjust the jog function pressure step value (see Section 3.4.3). <4UL> Adjus ...

© 2009 DH Instruments, a Fluke Company Page 136 If calibration of the reference pressure transducers (Q-RPT) is included as part of the overhaul procedure, the calibration procedure should be performed last. See Table 25 for a list of parts used in PPCH maintenance. Regular preventive maintenance should include, in order, the following : • Check that the electronic module rear panel cooling fan (top rear) operates when PPCH is ON. Replace if necessary. • Visually inspect internal mechanical system (see Section 5.9). Look for accumated oil which c ...

Page 111 © 2009 DH Instruments, a Fluke Company IP Purpose Increase the pressure slowly by the requested amount. Command “IP n” Classic “IP=n” Arguments n: The increase in pressure desired (current pressure units). This can be from 0 to 2 % FS of the active range. Remarks The up control valve will be used to increase the pressure the requested amount at a rate of 0.2 % FS/sec. The PPCH controls pressure up to the target and then stops, so the change in pressure will be approximate. Example (enhanced) Cmd sent: Reply: “IP 20” “20 kPa” (no reply if IEEE-4 ...

© 2009 DH Instruments, a Fluke Company Page 20 Verify the maximum pressure rating of the system connected to the PPCH TEST port before entering a target pressure. Do not enter a target pressure greater than the pressure rating of the system or instruments connected to the PPCH TEST port. PPCH should set the target pressure and indicate Ready (see Section 3.2.3) continuously in 60 to 120 seconds. If it does not, see Section 6 to troubleshoot. 2.5 STORAGE AND SHIPPING 2.5.1 SHORT TERM STORAGE The following procedure is recommended for short term stora ...

© 2009 DH Instruments, a Fluke Company Page 42 Gauge Measures pressure relative to atmosphere (zero is ambient pressure) using PPCH’s automated offsetting of atmospheric pressure with dynamic compensation for atmospheric pressure changes (see Section 3.2.4). Range is from zero gauge to full scale. The maximum pressure of each Q-RPT is the same in absolute and gauge measurement modes. If the Q-RPT will not be used in absolute mode, absolute mode can be turned off to avoid using it unintentionally (see Section 5.3.5).  OPERATION To change the active ...

© 2009 DH Instruments, a Fluke Company Page 62 See Section 3.4.6 for information on customizing pressure control parameters. 3.3.10.4 RAMP CONTROL MODE, [ENT/SET P] If the PPCH is not set for ramp control, use SPECIAL, <6control>, <2mode> to select ramp control mode. Use ramp control with caution. An ascending ramp will not stop increasing pressure until stopped by a new pressure command, aborting control or reaching the active range upper limit pressure (see Section 3.4.4). For best results, wait 5 minutes with the PPCH vented before controlling pre ...