Despatch LCC1-87NV-2 - Manual (Page 34)

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and < 1 VDC when off.
5.
Reconnect line power to the control.
6.
Replace the SSR if shorted or replace the CONTROL instrument if the output
does not measure properly.
Thermocouple Test
1.
Place a jumper or short the thermocouple terminals on the control. The display
should read ambient temperature and be very stable.
2.
Replace the CONTROL if the unit is not stable.
Safety Controls
Make these tests carefully and do them regularly. The safety of personnel as well as
the equipment may depend upon the proper operation of any one of these controls at
any time.
Temperature Control (every 40 hours) - The heater indicator light should flash every 1
to 2 seconds when the control is operating at a steady set point temperature.
HIGH LIMIT (every 40 hours) - With the oven operating at a given temperature,
gradually lower the high limit setpoint to the setpoint operating temperature. Verify that
the HIGH LIMIT trips (heater indicator will turn off and remain off). Return the HIGH
LIMIT to its original setting and press the high limit reset button.