Thermo Scientific 3960, Operating And Maintenance Manual

Page: 21 / 54

3-2 29 cu ft Environmental Chamber Thermo Scientific
Section 3
Configuration
Set Low Temp Alarm
Limit (Tracking Alarm)
The low temp alarm limit is the deviation from the temperature setpoint,
which will cause a low temp alarm. The low temp alarm is variable from
0.5° below setpoint to 5.0° below setpoint. The factory setting is 1.0°
below setpoint. A minus sign in the display indicates that the alarm setting
is below the setpoint.
1. Press the Mode key until the Config indicator lights.
2. Press the right arrow until Temp Lo -X.X is displayed in the message
center.
3. Press up/down arrow to change the low temp alarm limit.
4. Press Enter to save the low temp alarm limit.
5. Press the Mode key to return to Run mode or right/left to go to
next/previous parameter.
The temperature alarms can be programmed to trip the remote alarm
contacts. A setting of ON will cause this, a setting of OFF will not allow
temperature alarms to trip the contacts. The factory setting is ON.
1. Press the Mode key until the Config indicator lights.
2. Press the right arrow until TMP RLY XXX is displayed.
3. Press the up/down arrow to toggle the setting ON/OFF.
4. Press Enter to save the setting.
5. Press the Mode key to return to Run or the right/left arrow key to go
to next/previous parameter.
Enable Temp Alarms
to Trip Relay Contacts