TB 9-6695-281-35
11. Thermocouple Thermometer Lead Resistance
a. Performance Check
(1) Short resistance measurement system (A2) UNKNOWN terminal 1 to
UNKNOWN terminal 2. Measure and record zero resistance value
(2) Disconnect TI batteries and connect TI thermocouple leads (red and black) to
resistance measurement system UNKNOWN terminals.
(3) Set TI TEMPERATURE selector switch to 0 REF on CHROMEL-ALUMEL
(degrees) C. outer scale and RESISTANCE and VOLTAGE selector switch to 2. Resistance
measurement system indication minus value recorded in (1) above will be between 1.96 and
2.04 ohms.
(4) Repeat technique of (3) above for 8 and 22 ohm switch positions. Resistance
measurement system will indicate between 7.96 and 8.04 and 21.96 and 22.04 respectively.
b. Adjustments. No adjustments can be made.
12. Resistance Type Thermometer
a. Performance Check
NOTE
TI batteries should be disconnected for this check.
(1) Connect leads and adapters (B1, B2, B3, and B4) to resistance measurement
system (A2) UNKNOWN terminals and short leads. Measure and record the zero
resistance.
(2) Connect resistance measurement system to TI thermometer test cable pins B
and C, using leads and adapters (B1, B2, B3, and B4).
(3) Set TI TEMPERATURE selector switch to -70 on 9638 OHMS RES inner scale.
Resistance measuring system minus zero resistance value recorded in (2) above will
indicate between 68.22 and 68.32 ohms.
(4) Repeat technique of (3) above for TEMPERATURE selector switch positions
listed in table 7. Resistance measuring system will indicate within limits specified.
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