HEMACOOL
TM
Model HMC-MIL-1 Operations Manual August 2003
Energy Storage Technologies, Inc.
Dayton, Ohio 45459
28
stabilization period. The last temperature logged before you removed the logger from the
unit should be between 2°C and 5°C as with the thermocouple measurement.
Pull out on the front panel toggle switch and change the temperature setting to
–22°C
.
After allowing 24 hours for the unit to stabilize, check that your thermometer reads at
least
–22°C
± the accuracy tolerance of your thermometer. The display on the side of the
unit should agree within
2°C
at this temperature.
Check Indicator Lamps
To test the temperature indicator lamps on the side display, after the unit has been
stabilized at the
4°C
setting, observe that the temperature indicator lamp is GREEN, open
the lid and remove the dummy load baskets nearest the display end of the unit. In the
middle of the tub wall at that end you will see the black temperature sensors protruding
slightly. Place your hand over these until the display shows
6°C
or higher. The
temperature indicator lamp should turn from GREEN to RED within 20 seconds of the
temperature change.
The battery indicator lamps may be tested by disconnecting the unit from external power
and allowing the battery to run down. You may observe the battery voltage on the
display. As the battery runs down, the display should change color at the voltages
indicated in the tables on page 15.
CAUTION, this test will run the battery down and
allow the unit to stop. Never conduct this test with real payload in place or it may
be ruined.
To test the temperature setting indicators on the power panel, observe that the lamp is
correctly lit for your current setting. Pull out on the temperature setting toggle switch and
change the setting. You should see the first lamp go out and the second come on.
Immediately return the switch to your original setting to avoid affecting the inside
temperature.
