Operation
12 Installation and Operation Manual
Thermo Scientific Cryogenic Storage Freezers
6.3.3 Setting the Alarms
To set the cold alarm, complete the following steps:
1. Confirm that the key switch is at the Power On position (Setpoint
Security disabled)
2. Press and hold the Cold Alarm Setpoint pad. The LED next to this pad
lights. The temperature display shows the Cold Alarm value.
3. Press and hold or to adjust the Cold Alarm Setpoint. This setpoint
should be at least 10°C colder than the operating setpoint.
4. Release both pads when the digital temperature display window shows
the correct setpoint value.
To set the warm alarm, complete the following steps:
1. Confirm that the key switch is at the Power On position (Setpoint
Security disabled).
2. Press and hold the Warm Alarm Setpoint pad. The LED next to this pad
lights. The temperature display shows the Warm Alarm value.
3. Press and hold or to adjust the Warm Alarm Setpoint. This
setpoint should be at least 10°C warmer than the operating setpoint.
4. Release both pads when the digital temperature display window shows
the correct setpoint value.
When the cabinet temperature drops below the Warm Alarm setting, turn
the key switch to ALARM ON. The freezer is ready to operate.
Note:
If a power failure lasting over 30 seconds occurs, the POWER ON light
goes out and the POWER FAILURE light and digital temperature display flash
simultaneously.Y
IMPORTANT NOTE:
You must turn the three-position key switch to the
ALARM ON/SETPOINT SECURITY position to activate the alarm and
place it in security operation. Do not perform this action until the cabinet
temperature drops below the warm alarm setpoint.
