Graco PrecisionSwirl Instructions-Parts List Manual page 90

Repair
Adjust Amplifier Settings
12. Remove cover from amplifier (116). See Replace
Amplifier, page 89.
13. Ensure the EXCITATION SELECTOR jumper is in
the middle position (5 Vdc). See F
14. Ensure the COARSE 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 or a paper clip to
connect the SHUNT CAL and ENABLE terminals.
To Readout
Excitation Selector
F . 62: Amplifier Settings
IG
21. Replace the amplifier cover. See Replace
Amplifier, page 89.
22. Reconnect the outlet pressure sensor cable if it was
removed.
23. If desired, change pressure units to desired setting
on Advanced screen 2.
90
. 62 on page 90.
IG
EXCITATION
POWER
(+)SUPPLY
(-)OUTPUT
SUPPLY RETURN
(+)OUTPUT
SHUNT CAL
ENABLE
ZERO
EX SEL
10 VDC
5 VDC
3 VDC
Coarse Zero
Fine Zero
17. Use the data from the certificate of calibration for
the pressure sensor (included with PCF
documentation or the replacement pressure sensor)
to calculate the Shunt Calibration Pressure using
the following formula:
Shunt Calibration Pressure = (Shunt Cal Factor /
Calibration Factor) * 5000 psi
18. Adjust the FINE GAIN potentiometer until the Outlet
Pressure on Fluid Plate x, screen 5 (Pressure
Sensors) matches the calculated Shunt Calibration
Pressure.
19. Remove the jumper wire or paper clip from the
SHUNT CAL and ENABLE terminals.
20. Repeat steps 15 - 19 at least one additional time to
ensure proper calibration.
MODULE
TRANSDUCER
1 A (+)EXCITATION
2 B (-)EXCITATION
(+)SIGNAL
3 C
4 D
(-)SIGNAL
5 E
SHUNT CAL
6 F
RESISTOR
SPAN
ON
1 2 3 4 5 6 7 8
COARSE
Coarse Gain
Fine Gain
Panel mounting holes.
Use #6 or #8 screws.
To Transducer
3A2098S