Despatch 926E Equipment Manual (C-155)Rev 2/11 - Manual (Page 24)

19
Heating Only Operation
For heating only applications, when the
chamber is heated only above chamber
ambient, cooling gas supplies and
plumbing are not needed. Operation of
the chamber then requires setting the
temperature control and over-temperature
safety set-points. Refer to the manufacturers controller instructions to familiarize
yourself with the operation of this control.
1.
Attach the test fixture or tray to the chamber.
2.
Insure that the POWER switch is off.
3.
Plug the chamber power cord to the correct line power receptacle. (See Power
Cord Installation)
4.
Set the HI-LIMIT control to a temperature that is higher than the desired
chamber temperature but lower than a temperature at which the test object might
be damaged.
5.
Toggle the POWER switch ON and allow the chamber to heat to the correct
operating temperature.
6.
Set the SET-POINT control to the desired temperature.
7.
Over-temperature thermostat function should be verified each time the chamber
is started.
a. Verify proper function of over-temperature thermostat by adjusting its set
point lower than the chamber temperature. Power should be cut off to the
heater(s) and fan motor(s).
b. An over-temperature trip or power outage requires manual reset by
placing power switch to reset position.
Should a controller malfunction occur and the test chamber reaches the adjustable
over-temperature set point, the over-temperature thermostat will automatically cut off
the line power to the heaters.
WARNING: Avoid adapters that will either unground the
chamber or will permit connection to the
wrong power source. Check the current
rating of the circuit.