START-UP OF UNIT
Follow the procedures for the initial and consequent operations of the unit.
1.
Confirm that all switches kinds (power supply switch, battery switch, remote alarm switch and back-up
system switch) are off.
2.
Set liquid N
2
gas cylinder.
3.
Put the inner lid, close the door, and connect a power cord to the power supply.
4.
Turn on the power supply switch. The chamber temperature is indicated.
5.
Set up the temperature with the temperature control knob when using a back-up system.
6.
Turn on the battery switch, remote alarm switch and back-up switch.
7.
Push the alalm buzzer stop key (BUZZER) for about 5 seconds, and confirm the flashing of the alarm
lamp and a buzzer sound. When it is pushed again, an alarm test movement is finished.
8.
Push the back-up test switch, and confirm that liquid N
2
flows into the freezer.
9.
Turn off a remote alarm switch and a back-up switch when temperature of the sample is high. Then,
turn on these switches under the condition that a sample is refrigerated again.
Operation after power failure
The set value is memorized by nonvolatile memory. Accordingly, the chamber resumes the operation
with setting before power failure. During the power failure, the clock function is operating.
■
Change a setting as necessary because the freezer resumes with -150
o
C setting if the battery is
discharged.
14
