TM 55-4920-401-13&P
Table 1-12. Indicator and Control Functions (Continued).
Indicator or Control
Function
STD DAY lamp
Flashes when controls are not in correct position to
make standard day corrections and glows steadily
when positions are correct.
STD DAY switch
In ON position, rpm and temperature readings are
automatically corrected to standard day conditions.
TEMP °C indicator
Indicates aircraft indicator test signal, spread ther-
mocouple outputs, average output of egt thermo-
couples, heater probe temperature set signal, and
heater probe temperature.
TEMPERATURE switch
The OPERATE position in conjunction with other
controls selects the signal (heater probe output, air-
craft thermocouple output, or aircraft indicator
test) to be displayed by TEMP °C indicator. Heater
probe set temperatures of internal calibration sig-
nal are displayed when this switch is in HEATER
PROBE TEMP SET or CAL 600 °C position
respectively.
T/C INPUT switch
Connects output of either heater probe thermo-
couples (in HEATER CABLE position) or engine
thermocouples (CHECK CABLE position) to TEMP
°C indicator.
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