MIL-F-48b73 (AR)
40.3
CALIBRATION
PROCEDURE
supply, overvoltage
protective
VDC power
40. 3.1
Internal
+5
measurement.
Set external DC power supply for minimum
40. 3.1.1 Step 1.
output and to current limit at 100 ma.
Disconnect internal power lead at terminal
40.3.1.2 Step 2.
strip TB2-1.
Connect test circuit of Figure 10.
40. 3.1.3 Step 3.
Slowly increase output of external DC power
40. 3.1.4 Step 4.
supply (do not exceed +6.5 VDC) until crowbar condition occurs.
Just prior to crowbar, the DMM shall indicate +5.9 to +6.1 VDC.
Adjust test set OVP as required.
Disconnect test circuit of Figure 10 from
40.3.1.5 Step 5.
test set.
Reconnect power supply lead removed in Step 2.
40. 3.1.6 Step 6.
+5 VDC output.
40.3.2
It shall be
Depress test set POWER switch.
step 1.
40.3.2.1
illuminated .
Connect DMM to test set terminal strip TB2-1
40. 3.2.2 Step 2.
(+) and TB2-2 (-).
The DMM shall indicate +4.9 to +5.1 VDC.
40. 3.2.3 Step 3.
Adjust test set power supply as required.
Disconnect DMM from test set.
40. 3.2.4 Step 4.
40.3.3
Reference
oscillator
measurements.
Set decade resistor to 10K ohms.
40.3.3.1 Step 1.
Set both external DC power supplies to +13.5
2.
Step
40. 3.3.2
to +16.5 VDC and set power switches to off.
Connect test circuit of Figure 11.
40.3. 3.3 Step 3.
Simultaneously set both external power supply
4.
40.3.3.4 Step
power switches to on.
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