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TM 55-6695-220-13&P
Table 3-4. Pyrometer Resistance Output (50.00)
Position of
Temperature
Switch (°C)
Resistance
(Ohms)
Tol. = ± .05
Position of
Temperature
Switch (°C)
Resistance
(Ohms)
Tol. = ± .05
-50
37.95
-
-
0
50.00
200
116.50
+50
63.55
250
139.00
+100
79.00
300
164.50
150
96.50
-
-
b.
Pyrometer Voltage Checkout.
(1) Rotate the RESISTANCE AND VOLTAGE FUNCTION SWITCH to the 24 V position and apply a 500 ohm
load across connector pins A and C, using the Resistance Box Model 71650 or equivalent.
(2) Connect the Digital Multi-meter or equivalent in parallel with the load across pins A and C.
(3) Connect a 45 volt battery to the appropriate terminals on the tester.
(4) Adjust the COARSE AND FINE RHEOSTATS until the VOLTMETER pointer indicates 28.50 volts. The
Multimeter reading shall be 28.50 ± 0.50 Vdc.
(5) Adjust the VOLTMETER pointer to 22.50 V mark. The Multi-meter reading shall be 22.50 ±0.50 Vdc.
(6) Rotate the RESISTANCE AND VOLTAGE FUNCTION SWITCH to the 12 V position.
(7) Move the Multi-meter and 500 ohm load to connector pins D and C.
(8) Adjust the VOLTMETER pointer to 14.25 V mark. The Multi-meter reading shall be 14.25 ±0.50 Vdc.
(9) Adjust the VOLTMETER pointer to 11.25 V mark. The Multi-meter reading shall be 11.25 ±0.50 Vdc.
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