Despatch 926E Equipment Manual (C-155)Rev 2/11 User Manual
Page 38
33
Check safety controls. This should be done as indicated. 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 Controllers (weekly)
Observe that the heater or cooling indicator lights (LEDs 1 or 2) flash every 1
to 2 seconds when the controls are operating at set point.
High Limit Control (weekly)
With the oven operating at a given temperature, gradually turn the HI-LIMIT
control down to the set point operating temperature. The HI-LIMIT should trip
and shut off heater fan.
Practice safety. Make it a prime policy to know what you are doing before you do it.
Make CAREFULNESS, PATIENCE and GOOD JUDGMENT the safety watchwords for
the operation of your chamber.
Ventilation. There are fresh air and exhaust openings on the chamber that are always
open to provide cooling for the chamber and control compartment.
Door gaskets and ports. Periodically inspect inner and outer door gaskets and port
sealing for cracking, tearing, etc. If gaskets or seals are damaged, remove and replace.
Strip old gasket from channel and force new gasket in.
Preventative Maintenance Schedule. The following pages contain a typical periodic
maintenance schedule for the 900 Series test chamber.