Graco 3A2098H important safety instructions Adjust Amplifier Settings, To Readout, To Transducer

Repair

Adjust Amplifier Settings

12.Remove cover from amplifier (116). See Replace Amplifier, page 85.

13.Ensure the EXCITATION SELECTOR jumper is in the middle position (5 Vdc). See FIG. 59 on page 86.

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.

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:

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 Sen- sors) 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.

Panel mounting holes.

Use #6 or #8 screws.

EXCITATION MODULE

			POWER
	(+)SUPPLY			1
	(-)OUTPUT			2
To Readout	SUPPLY RETURN			3
	(+)OUTPUT			4
	SHUNT CAL			5
	ENABLE			6
	EX SEL	COARSE	ZERO
			FINE	FINE
	5 VDC
	10 VDC

3 VDC

Excitation Selector

Coarse Zero

Fine Zero

FIG. 59: Amplifier Settings

TRANSDUCER

A(+)EXCITATION

B(-)EXCITATION

C	(+)SIGNAL	To Transducer
D	(-)SIGNAL
E	SHUNT CAL
F
	RESISTOR

SPAN

ON

1 2 3 4 5 6 7 8

COARSE

Coarse Gain

Fine Gain

21.Replace the amplifier cover. See Replace Ampli- fier, page 85.

22.Reconnect the outlet pressure sensor cable if it was removed.

23.If desired, change pressure units to desired setting on Advanced screen 2.

86 3A2098H