SECTION IV CALIBRATION

TB 11-6625-2715-50

SECTION IV

CALIBRATION

1-9. Current Calibration. a. Performance Check.

setup and adjust current shunt for 30 amp reading.

(8) Adjust current supply for a TI full scale

(1) Adjust Current Supply A3 and Decade

indication.

Resistor A4 for a TI full scale indication.

(9) Observe that the differential voltmeter

(2) Observe that the DC Differential Voltmeter

indicates between 294 and 30.6 millivolts.

indicates between 14.7 and 15.3 millivolts.

b. Adjustment. No adjustments can be made.

(3) Remove positive lead from 1.5 ampere

connector and connect to TI 3.0 ampere connector.

1-10. Final Procedure. a. Deenergize and disconnect

(4) Adjust current supply and decade resistor

all equipment.

for a TI full scale indication.

b. In accordance with TM 38-750, annotate and

(5) Observe that the differential voltmeter

affix DA Label 80 (US Army Calibration System). When

indicates between 24 and 30.6 millivolts.

the TI cannot be adjusted within tolerance, annotate and

(6) Remove positive lead from 3.0 ampere

affix Form 2417 (Unserviceable or Limited Use) (Red

connector and connect to TI 30 ampere connector.

Tag).

(7) Remove decade resistor from equipment