DH Instruments PPC3 - Figure 13. Q-RPT Module Schematics for Various Configurations

5. MAINTENANCE, ADJUSTMENTS AND CALIBRATION
Page 139 © 2002-2007 DH Instruments, a Fluke Company
TWO RPTs – No Gxxx or BGxxx
VALVE STATE
CONDITION
A B C
Vent
O O O
Measure/Control Hi
C O C
Measure/Control Lo
O C C
Power off
C O C
Valve C is shown for reference. It is in the pressure
control module.
TWO RPTs – One or Two Gxxx or BGxxx
VALVE STATE
CONDITION
A B C D
Vent
O O O O
Measure/Control Hi
C O C/O C
Measure/Control Lo
O C C/O C
Power off
C O O C
Valve D is shown for reference. It is in the pressure
control module.
Valve C is the TEST(-) vent valve. In normal
operation with BGxxx or Gxxx Q-RPTs, this valve is
closed during fine pressure control (see Section
3.5.7.5).
Figure 13. Q-RPT Module Schematics for Various Configurations