information is furnished in the event changes are desired or due to
aging of the components causing calibration errors.
Current Shunt - The calibrations of the programmer are based on the use of a 100 ampere/100
millivolt current shunt, however, shunts of other sizes can be used if the scale factor F =
(shunt amps/volt)/(100/0.1 amps/volt) is applied to the current rates and current limits. For
example, to use a 50 amp, 0.1 volt shunt, F = (50/.1)/(100/.1)-.5. Thus 10 amp/sec rate is now
0.5 x 10 amp/sec = 5 amp/sec and the full scale current limit is 0.5 x 100 amp = 50 amperes.
WARNING:
This calibration procedure is to be performed
only by trained service personnel familiar with electrical safety
precautions and proper energized electrical safety procedures. The
Models 410-412 contains high voltages capable of producing
life-threatening electrical shock. Do not perform any operations on
any AMI equipment with the cover removed unless qualified to do
so and another person qualified in first aid and CPR is present.
1. Deenergize the instrument by disconnecting the power plug from the power receptacle.
2. Disconnect the programmer from any power supplies.
3. Remove the instrument cover.
4. Verify the main PCB jumper configuration is as follows:
W1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . JUMPERED
W2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . JUMPERED
W3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . JUMPERED
W4 . . . . . . . . . . . . . . . . . OPEN
W5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . JUMPERED
W6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . JUMPERED
W7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . JUMPERED
W8 . . . . . . . . . . . . . . . . . OPEN
W9 . . . . . . . . . . . . . . . . . OPEN
W10 . . . . . . . . . . . . . . . . OPEN
W11 . . . . . . . . . . . . . . . . OPEN
5. Adjust the STABILITY potentiometer P7 fully counter-clockwise.
6. Place a shorting jumper across the CAL test points on the PCB.
7. Plug in the line cord to the proper voltage source.
8. Place the front panel COMPUTER/MANUAL switch in the MANUAL position.
9. Place the POWER switch to the ON position.
10. Ensure the power LED and the DVM on the front panel are lit.
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