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Thermo Scientific
Alarms
The Model 3962 Series environmental chamber is equipped with a system which notifies
the user of an alarm condition inside the environmental chamber. All alarms are displayed
in the control panel message center. The following table contains information on all
possible systems alarms.
To avoid alarms going off in day-to-day use, some alarms are equipped with a time-delay
feature. For this to function correctly, the alarm condition must exist for the specified
length of time before the message center will display the alarm. This allows for
interruptions, such as door openings, to occur without the environmental chamber going
into a continuous state of alarm.
When an alarm condition exists, the Silence key can be pressed to temporarily mute the
audible alarm. The message center will continue to show the alarm condition. If the alarm
condition is not corrected within a specified length of time, the alarm will sound again or
"ring back" to remind the user.
When multiple alarm conditions occur, active messages are displayed in the display
center one at a time, updating at 5-second intervals. Pressing Silence during multiple
alarms causes all active alarms to be muted and to ring back in 15 minutes.
The temperature alarms are disabled when the Temp set point is 10 °C.
Description
No alarm condition exists
Temp > Otemp Set point
Air Temp Sensor Fault
Temperature Controller Failure
Door is Open
Temp < Temp Low Tracking Alarm
Table 7-1 Systems Alarms
Sensor Fault Alarms
The microprocessor in Model 3962 environmental chambers continually scans all
available sensors to ensure that they are operating properly. Should an error be detected,
the environmental chamber will sound an alarm and display the appropriate message. If
such an alarm occurs, contact your local distributor or the Technical Services department.
Message Code
Delay
SYSTEM OK
-----
SYS IN OTEMP
0 min.
AIR SNSR ERR
0 min.
TMP CTRL ERR
0 min.
DOOR IS OPEN
15 min.
TEMP IS LOW
15 min.
Handling and Control |
Chapter 7
Ring back
Relay
-----
-----
15 min.
Yes
15 min.
No
15 min.
Yes
15 min.
Yes
15 min.
Programmable
Model 3962 | 7-9
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