VICI 150 Dynacalibrator - Manual (Page 7)

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. 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.
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 7.
Setting the Chamber Temperature Limit Switch
A mechanical thermostat is integrated with the temperature control circuit
for fail-safe temperature control. This thermostat should be used to prevent
accidental overheating of low temperature permeation devices or perme-
ation 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, turn the limit switch
all the way clockwise.
2. Turn on the Dynacalibrator. 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 rotate the limit switch counterclockwise until the
display reads “PFAIL”. (You may hear a faint click.)
5. Turn off the Dynacalibrator and wait 15-20 minutes for the chamber to cool.
6. Turn on the Dynacalibrator 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.
Setting the Chamber Temperature via Serial Port (RS-)
Refer to the section titled “Serial Port Communications” on page 7.
Installation