Forma Scientific, Inc.________________________________________Enviro-Scan Monitor
3-4
Limit
Low
The low limit key is used to establish a Low Limit set point. When the chamber
temperature reaches (or exceeds) the Low Limit set point, the audible alarm will sound and
the UNDER TEMP indicating light will come on. The remote alarm contacts, located on the
back of freezer, will also be activated. Refer to Section 4.2 for Low Limit setting
instructions.
Limit
High
The high limit key is used to establish a High Limit set point. When the
chamber temperature reaches, or exceeds, the High Limit set point, the audible alarm will
sound and the OVER TEMP indicating light will come on. The remote alarm contacts,
located on the back of the freezer, will also be activated. Refer to Section 4.2 for High
Limit setting instructions.
Setpoint
Control
After depressing this key and entering the access code, the setting for the
temperature control will appear in the display. The control setting is adjusted by turning the
Set Point Adjusting Screw located on the far right of the monitor panel.
Note: When in a battery backup condition (AC power off), the control set point
value is replaced with "--" to prevent false data from being displayed.
Press ENTER to return to the temperature display.
a. Set Point Adjustment Screw located to the right of the ENTER key is used to
set the operating temperature of the freezer. An adjustment screwdriver is located on the
back panel of the compressor section. (See Figure 3-2 and Figure 2-1).
3.5 Audible Alarm and Control Panel Indicators
Audible Alarm:
Provides a pulsing audible tone whenever an alarm condition is present. The DOOR
AJAR audible alarm has a 30 second delay to prevent nuisance alarms when the door is
opened. Pressing the ALARM SILENCE key will silence all alarms for 30 minutes.
Note: When in STANDBY mode, the audible alarm is silent until all alarm
conditions are cleared. Audible alarm conditions include OVER TEMP,
UNDER TEMP, DOOR AJAR and AC power failure.
Over Temp (LED): Flashes when an over temperature condition
exists.
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