TB 9-6695-281-35
10. Thermocouple Thermometer
a. Performance Check
NOTE
A full-scale (red
line)
indication
is
required
for
all
measurements.
(1) Remove TI TESTER STANDARDIZING ONLY cover.
(2) Connect equipment as shown in figure 2.
(3) Set TI RESISTANCE and VOLTAGE selector switch to THERMOCOUPLE
BENCH TEST 8 OHMS.
(4) Adjust resistance standard (A3) for 17 OHMS.
(5) Adjust TI COARSE and FINE rheostats for full-scale (red line) indication on TI
(6) Set TEMPERATURE selector switch to -50 on IRON-CONSTANTAN (degrees)
C outer scale. If digital voltmeter (A1) does not indicate between -3.53 and -3.61 mV dc,
perform b below.
(7) Repeat technique of (4) through (6) above for switch positions listed in table 6.
Digital voltmeter will indicate within limits specified.
Figure 2. Thermocouple thermometer - equipment setup.
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