VICI 230 Dynacalibrator - Manual (Page 18)

14
Setting the Chamber Temperature Manually
To read the current set point: press and hold the button.
To read the chassis environment temperature: press and hold the button.
1. To set the desired temperature, simultaneously press the and buttons,
then release them. The PNL light will start flashing, indicating the controller is
in the temperature set mode.
2. Use the and buttons to reach the desired temperature set point. NOTE:
Maximum temperature set point is 110°C; minimum is 30°C.
3. To enter or register the desired temperature set point, simultaneously press
the and buttons, then release them. The PNL light will stop flashing. If
the set point is not entered, after two minutes the controller will ignore the
temperature in Step 2 and revert to its previous status.
To prevent the set point from being accidentally changed, the front panel
controls can be disabled with a serial command. Refer to the section titled
“Serial Port Communications” on page 16.
Setting the Oven Temperature Limit
A mechanical thermostat is integrated with the temperature control circuit for
fail-safe temperature control to a limit set at the front panel control. The thermo-
stat prevents accidental overheating of low temperature permeation devices or
permeation devices containing toxic or hazardous chemicals. Overheating can
rupture the device or cause an unintended release of chemicals.
The temperature markings on the front panel are approximate (±10°C). For a
more accurate setting:
1. Using a flat-tipped screw driver or the tool provided, adjust the setting all the
way clockwise.
2. Turn on the Dynacalibrator main power and heater power. Do not install any
permeation devices yet.
3. Set the chamber temperature 5°C higher than the desired operating
temperature, and wait for temperature equilibrium.
4. After equilibrium, slowly adjust the setting clockwise until the display reads
“PFAIL”. (You may hear a faint click.)
5. Turn off the heater power switch and wait 15-20 minutes for the chamber to
cool.
6. Turn on the heater power switch and set the chamber operating temperature.
When PFAIL occurs, the Dynacalibrator must be turned off
long enough for the chamber to cool before the power is
turned back on.
Initial Power-Up