Helmer Scientific i.Series
®
and Horizon Series
™
Refrigerator - Upright
Operation Manual
360372/B
19
6.4 Set Parameter Values
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 release
SEL
button to scroll through the parameters.
4. Once the desired parameter is selected, press and hold the
SET
button while pressing the
Up
or
Down Arrow
to select
the desired value.
5. Release
SET
button. The new setting is saved.
6. Press and hold the
Up
and
Down Arrows
simultaneously for 3 seconds to exit program mode.
Note
Contact Helmer Technical Service to set Hysteresis values.
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 25.0 (˚C) -40 to 77 (˚F)
5.5 ˚C
Low Temperature
MONITOR Lamp & LOW Lamp
-40.0 to 25.0 (˚C) -40 to 77 (˚F)
1.5 ˚C (HB); 2.0 ˚C (HLR & HPR)
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
CONTROL Lamp
0.5 to 2.5 (˚C) 1 to 5 (˚F)
2.0˚C (111)*
1.0˚C (120, 125)
1.5˚C (245, 256)
*
Hysteresis for 11 cu ft units prior to serial number 2044369 in low humidity mode = 0.8
˚C
.
6.5 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.
6.6 Temperature Calibration Offsets
Temperature calibration offsets indicate an acceptable margin of error between the actual temperature value and the desired
temperature value.
Monitor Offset
♦
Adjust if temperature displayed on the monitor is outside of your range when compared to a calibrated reference
thermometer in the same probe bottle.
♦
Value is factory-set to match a calibrated reference thermometer.
♦
Refer to the service manual for instructions regarding changing the Monitor Offset.
Horizon Series Operation