|
| |
TM 55-6695-220-13&P
3-7.
OPERATIONAL CHECKOUT AND CALIBRATION.
3-7
a.
Pyrometer Resistance Checkout.
(1) Begin by disconnecting the 45 and 22.5 volt terminals from the battery to prevent the meter pointer from
hitting the upper stop.
(2) Rotate the RESISTANCE AND VOLTAGE FUNCTION SWITCH to the 12 V position and the LEFT AND
SINGLE SWITCH to the LEFT position.
(3) Connect the Digital Multi-meter between connector pins B and C in a 4-lead ohmmeter configuration. The
resistance readings between pins B and C shall correspond to those specified in Tables 3-3 and 3-4 within
±0.05 ohm.
(4) With the Digital Multi-meter connected between pins E and C and the LEFT AND SINGLE SWITCH in the
RIGHT position the resistance values shall also correspond to those values listed in Tables 3-3 and 3-4
within ±0.05 ohm.
Table 3-3. Pyrometer Resistance Output (90.38 Ohms)
Position of
Temperature
Switch (°C)
Resistance
(Ohms)
Tol. = ± .05
Position of
Temperature
Switch (°C)
Resistance
(Ohms)
Tol. = ± .05
-70
68.27
80
120.36
-50
74.24
100
128.85
-30
80.56
120
137.78
-10
87.04
150
151.91
0
90.38
200
177.95
+10
93.80
250
208.00
+30
100.91
300
242.70
50
108.39
-
-
3-6
|
