7340_7350-25-33 Series Operations Manual
Rev J 3-31-21
Page 51 of 92
ALARMS
Alarm System Overview
The chamber control system is equipped with an alarm system that constantly monitors
temperature, and humidity (on humidified models) to ensure the user is notified if the
cabinet goes into an alarm condition. Notification occurs via an alarm pop-up window
and a buzzer. Each alarm condition has been factory programmed to minimize nuisance
alarms while maximizing warning time. There is a 2 hour time delay after start-up and
setpoint changes. To avoid nuisance alarms after a routine door opening, an alarm
condition must be present for 15 minutes* (45 minutes for humidity) before the operator
is alerted. If the optional remote alarm contacts are present, in an alarm condition, the
dry contacts will change state.
*Alarm delays are adjustable, see “Changing Alarm Setpoints and Delay” for details.
The following alarm messages may be displayed:
Chamber temperature is higher than setpoint temperature
Chamber temperature is lower than setpoint temperature
Chamber humidity is higher than setpoint humidity (HUMD307 option)
Chamber humidity is lower than setpoint humidity (HUMD307 option)
Temperature sensor error
In the event an alarm occurs, the alarm indicator will appear on the status bar and an
audible alarm pop-up window will automatically appear.
The flashing
(Alarm) icon will appear on the status bar.
Alarm icon
Audible speaker
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