Specifications

MARATHONNORCO AEROSPACE, INC.
NICKEL-CADMIUM AIRCRAFT BATTERIES
24-34-00
Page 401
APR 15/06
4.0 SENSOR ASSEMBLY INSPECTION
Inspect battery for proper placement of thermostats, heaters, thermistors or other sensor elements.
Inspect wiring and receptacle for insulation damage, corrosion, and crimping or other defects.
At least once each calendar year, perform a functional test on the temperature sensor assembly. All
functions must be within ± 10% of the values given in Table 3.
Dielectric Test: (If required in Table 3) Use a Dielectric (Hi-Pot) Tester capable of measuring a current
flow of 25 µA at 500 Volts DC. Place sensor leads in a small container filled with DI water, allowing the
assemblies to be submerged completely. Place the Negative (-) lead of the Dielectric tester in the
container with the sensor leads. While holding the receptacle, probe the pins listed in Table 3 with the
Positive (+) lead of the Dielectric tester to check for current leakage. A current flow greater than 25 µA
would constitute a failure.
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