28. Connect a precision millivoltmeter across the current shunt.
29. Energize the system as described in the Operation section of this manual.
30. Place the front panel CURRENT LIMIT POT to the fully CW position.
31. Place the front panel CURRENT CONTROL switch in the UP position.
32. After the current has reached the system maximum (typically 100 Amperes), adjust the
GAIN potentiometer P1 until the millivoltmeter reads exactly 100mV.
33. Place the front panel CURRENT CONTROL switch in the DOWN position.
34. Move jumper W3 to W4 on the PCB.
35. Remove jumpers W5 and W6 on the PCB.
36. Connect the voltmeter between TP11 and common. Use the front panel CURRENT
CONTROL switch to adjust the voltage to approximately 1 volt. Leave the switch in the
pause position after adjustment.
37. Move the positive lead of the voltmeter to the right side of C9 or C10. (This is the side of
the integrating capacitors near U12 & U13).
38. Adjust the DRIFT potentiometer P9 until the voltmeter reads 0.000 volts.
39. Disconnect the voltmeter.
40. Move jumper W4 to W3 on the PCB.
41. Replace jumpers W5 and W6 on the PCB.
42. Perform the following if the system is controlled by computer via a MAXUS interface.
a. Connect the MAXUS AIO-2000 interface unit to J5 on the rear panel of the
programmer.
b. Switch the front panel COMPUTER/MANUAL switch to the COMPUTER position.
c. Set the ramp rate of the programmer to 1.0 A/S via the MAXUS.
d. Set the current limit of the programmer to 0.0 via the MAXUS.
e. Connect a precision millivoltmeter across the current shunt.
f. Adjust INPUT NULL potentiometer P2 for 0.000 on the millivoltmeter. This
adjustment should correspond to zero voltage on the power supply.
g. Read back the current via the MAXUS. Adjust ZERO OFFSET potentiometer P3
until the MAXUS reads back 0.000 current.
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