Despatch RBC1-50 with Protocol Plus - Manual (Page 29)

25
Tests
Tests should be performed carefully and regularly. The safety of personnel as well as
the condition of equipment may depend upon the proper operation of any one of the
functions of the temperature control. Test the control every 40 hours. Check that the
heater LED is cycling on and off, indicating that the heater is working. Also at this time,
check the high limit function to make sure it is working properly. Refer to
manufacturer’s instruction manual on the controls, if necessary.
To test the high limit:
1.
Set the HIGH LIMIT instrument to its highest temperature.
2.
Set the CONTROL instrument to your normal process temperature and let
chamber stabilize at that temperature.
3.
Adjust the HIGH LIMIT slowly downward toward the temperature of the oven until
the heater is shut off.
4.
The HIGH LIMIT alarm indicator should flash and a high limit alarm message
should be displayed. The alarm horn should sound.
5.
Verify that the heater relay has been disabled by checking that 2LED on the
control panel circuit board is not lit.
6.
Return the HIGH LIMIT setpoint value to their original value.
7.
Press the Reset key.