Helmer Scientific Horizon HLF105, Руководство по обслуживанию

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360142-D/D 29
i.Series® Models
7
Touch
+
or
–
on the
Upper Temperature
spin box to increase or decrease the value to match the
measured value. The message “New Setting Saved” appears next to the spin box.
NOTE After saving the new temperature value, the displayed temperature may not match the
new value. This is normal.
9 Remove thermometer from probe.
10 Replace bottle cap, ensuring a tight fit.
11 Place probe in bottle, immersing at least 2” (50 mm).
7.3.2 Control Sensor Offset
The temperature controller senses unit cooler temperature through the control probe in the unit cooler.
The unit cooler temperature typically varies from the chamber temperature, so an offset value is used by
the control system to compensate for the difference.
The temperature controller adjusts chamber temperature around the freezer setpoint by activating the
compressor when the control probe registers above the setpoint.
NOTE ► Control Sensor Offset is factory-preset and should not be changed. Contact Helmer
Technical Service for instructions regarding changing the Control Sensor Offset.
► The monitor temperature must be verified and accurate prior to adjusting the Control
Sensor Offset.
1 View and record the Freezer Setpoint. (Reference Section II , Item 7.2 )
2 Allow the unit to run with calibrated monitor temperature for several compressor cycles, and record
the average monitor temperature
.
3 View and record the current Control Offset value.
4 Subtract the Freezer Setpoint from the average monitor temperature and record the difference.
5 Add the current Control Offset value to the recorded difference determined in the previous step to
establish the new Control Offset value.
EXAMPLE 1 Freezer Setpoint is 4.0
2 Average monitor temperature is 5.2
3 Current Control Offset is 0.3
4 Subtract: 5.2 - 4.0 = 1.2; difference between average temperature and setpoint
5 Add 0.3 + 1.2 = 1.5; new Control Offset value
Enter the new offset value:
1 Touch Home , i.C³ APPS , Settings .
2 Enter the Settings password.
3 Touch Temperature Calibration .
4 Touch + or – on the Control Sensor spin box.
► Value is factory-preset to match the temperature measured in the unit cooler (at the control
sensor) by a calabrated reference thermometer.
5 Touch + or – on the Control Sensor Offset spin box.
6 Touch Home to return to home screen.