13
START-UP OF UNIT
Follow the procedures for the initial and consequent operations of the unit.
1. A plug is connected with the power supply without putting samples in the product.
2. A power switch and a battery switch are turned on.
3. Push an alarm buzzer stop key (BUZZER), and stop an alarm buzzer though an alarm buzzer may
ring.
4. Set up chamber temperature.
5. Check that chamber temperature gets cold to setup temperature.
6. An alarm test key (ALARM TEST) is pushed, and an alarm lamp flashed, and it is checked that an
alarm buzzer rings. At this time, a remote alarm works, too. (When a remote alarm terminal is being
used.)
7. Put the storage samples by the above inspection so that chamber temperature may not rise when it is
completely normal.
< Important >
Do not block the air intake vent or air exhaust vent in the freezer. Arrange the storage items with
adequate space to keep the air circulation.
A sample deteriorates when chamber temperature rises.
Operation after power failure
The set value is memorized by nonvolatile memory. Accordingly, the freezer resumes the operation with
setting before power failure.
Note:
As for the after power failure, a product may not start by the voltage descent and so on so that all
machines may start at the same time. Be sure to check the operation conditions of the product.
TEMPERATURE SETTING
Table 1 shows the basic operation method. Perform key operations in the sequence indicated in the
table. The example in the table is based on the assumption that the freezer temperature is -25
o
C.
Note:
The unit is set at the factory that the chamber temperature -30
o
C.
Table 1 Basic operation sequence (Example: Chamber temperature -25
o
C)
Description of operation
Key operated
Indication after operation
1
Connect the power source and turn
on the power switch.
----
The current chamber temperature is
displayed. Chamber temperature
higher than 1
o
C to be displayed ”HI”
lower than -41
o
C to be displayed “LO”.
2 Press set key.
SET
The first digit is flashed.
3
Set the temperature to -25 with the
digit shift key and the numerical
value shift key.
When pressed, the settable
digit shifted.
When pressed, the figure of settable
digit changes.
4 Press set key.
SET
Set temperature is memorized and the
current chamber temperature is
displayed.
The freezer temperature can be set in the range between -15 and -35
o
C. Remember that the
guaranteed temperature with no load at an ambient temperature of 35
o
C is -30
o
C
The setting mode returns to the temperature display mode automatically when 90 seconds has passed
without any key operation. In this case, any setting before pressing the set key (SET) is not memorized.