Repair
86 3A2098H
Adjust Amplifier Settings
12. Remove cover from amplifier (116). S ee Replace
Amplifier, page 85.
13. Ensure the EXCITATION SELE CTOR jumper is in
the middle position (5 Vdc). See F
IG
. 59 on page 86.
14. Ensure the COARS E GAIN dipswitch 1 is set to ON.
All others should be set to OFF.
15. Adjust the FINE ZERO potentiometer until the outlet
pressure on the display reads 0.
16. Use a small piece of jumper wire o r a paper clip to
connect the SHUNT CAL and ENABLE terminals.
17. Use the data from the certificate of calibration for
the pressure sensor (included with PCF documenta-
tion or the replacement pressure sensor) to calcu-
late the Shunt Calibration Pressure using the
following formula:
18. Adjust the FINE GAIN potentiometer unti l the Outlet
Pressure on Fluid Plate x, screen 5 (Pressure Sen-
sors) matches the calculated Shunt Calibration
Pressure.
19. Remove the jumper wire or p aper clip from the
SHUNT CAL and ENABLE terminals.
20. Repeat steps 15 - 19 at least one a dditional time to
ensure proper calibration.
21. Replace the amplifier cover. See Replace Ampli-
fier, page 85.
22. Reconnect the outlet press ure sensor cable if it was
removed.
23. If desired, change pressure un its to desired setting
on Advanced screen 2.
Shunt Calibration Pressure = (Shunt Cal Factor /
Calibration Factor) * 5000 psi
F
IG
. 59: Amplifier Settings
1
2
3
4
5
6
A
B
C
D
E
F
EXCITATION MODULE
TRANSDUCERPOWER
(+)SUPPLY
(+)SIGNAL
(-)SIGNAL
(+)EXCITATION
(-)EXCITATION
(-)OUTPUT
(+)OUTPUT
SHUNT CAL SHUNT CAL
RESISTOR
ENABLE
EX SEL
10 VDC
5 VDC
3 VDC
ZERO
COARSE
FINE
FINE
SPAN
COARSE
12345678
ON
SUPPLY RETURN
Excitation Selector
Coarse Zero
Fine Zero Fine Gain
Coarse Gain
Panel mounting holes.
Use #6 or #8 screws.
To Transducer
To Readout