Helmer Scientific i.Series
®
and Horizon Series
™
Freezer - Undercounter
Operation Manual
360376/C
17
Table 3. Parameter Values
Parameter
Visual Indicator
Range
Default
Celsius or Fahrenheit
None
.C, .F
.C
High Temperature
MONITOR Lamp & HIGH Lamp
-40.0 to 40.0 (°C); -40 to 104 (°F)
-20.0°C
Low Temperature
MONITOR Lamp & LOW Lamp
-40.0 to 40.0 (°C); -40 to 104 (°F)
-40.0°C
Monitor Offset
MONITOR Lamp
-10.0 to 10.0 (°C); -18 to 18 (°F)
Varies
Control Offset
CONTROL Lamp
-10.0 to 10.0 (°C);-18 to 18 (°F)
Varies
Hysteresis
COOL Lamp
0.5 to 2.5 (°C); 1 to 5 (°F)
2.0°C
6.4
Set Temperature Units
Note
If temperature units are changed, the temperature setpoints, offsets and alarm settings must be recalibrated.
1. Press and hold the
Up
and
Down
Arrows simultaneously for 3 seconds to enter program mode.
2. The LED Display will show .C or .F to indicate Celsius or Fahrenheit.
3. Press and hold the
SET
button while pressing the
Up
or
Down
Arrow to select the desired temperature unit.
4. Release
SET
button. The new setting is saved.
5. Press and hold the
Up
and
Down
Arrows simultaneously for 3 seconds to exit program mode.
6.5 Temperature Calibration Offsets
Temperature calibration offsets indicate an acceptable margin of error between the actual temperature value and the desired
temperature value.
Monitor Offset
♦ Value is factory-set to match a calibrated reference thermometer.
♦ Refer to the service manual for instructions in changing the Monitor Offset.
Control Sensor Offset and Hysteresis
The control sensor affects the reading of the control probe temperature and therefore the actual temperature of the freezer.
This should not be adjusted from the original setting unless directed by Helmer Technical Service.
Hysteresis helps control the refrigeration based on the control probe temperature reading and the set point and should not
be changed from the default setting.
NOTICE
Control Sensor Offset and Hysteresis are factory-preset and should not be changed. Contact Helmer Technical Service for
instructions regarding changing these values.
5.6
Set Alarm Setpoints (Parameters)
1. Press and hold the
Up
and
Down
Arrows simultaneously for 3 seconds to enter program mode.
2. The LED Display will show .C or .F to indicate Celsius or Fahrenheit.
3. Press
SEL
until HIGH TEMP or LOW TEMP and MONITOR lamps flash.
4. Hold
SET
, then press
Up
or
Down
Arrow to change the setpoint.
5. Release
SET
button. The new setting is saved.
6. Press and hold
Up
and
Down
Arrows simultaneously for 3 seconds to exit program mode.
Horizon Series Operation
