Digital Thermometer
Digital display thermometers have a sensing range of -40°F to 220°F (-40°C to 105°C) which allows it to be used in a wide
variety of applications. Setting the Alarm Control for proper application is accomplished by installing the jumper on the "HI"
(High temperature alert for Refrigerators and Freezers) or "LO" (Low Temperature alert for Warmers) pin position as
shown:
Calibrating Digital Thermometer Display Temperature
The alarm switch must be placed in the right (T) position as shown when calibrating temperature.
*Note:
The digital thermometer has a built-in delay to display change every two (2) minutes. This prevents the display from
showing erratic temperature readings during door openings. When making any calibration adjustments, allow two minutes
for the delay to register temperature changes.
Place a reliable dial or digital thermometer sensing device in the center area of the cabinet. Turn the temperature
calibration screw clockwise to increase the temperature, or counter-clockwise to decrease the temperature. Wait two
minutes for the display to respond to the new settings.
Setting Digital Thermometer Alarm
Move the alarm switch to the left (AL) position. (The Display may begin to Flash.)
Turn alarm adjusting screw clockwise to increase the setting or counter-clockwise to decrease.
Set the temperature to the appropriate range for the application as shown above.
Move the alarm switch to the right (T) position.
Note:
The alarm is indicated by a flashing display temperature and occurs when temperatures rise above the alarm setting
for refrigerators and freezers, or when temperatures drop below the alarm setting for warmers. Changing the jumper to
read in "Centigrade" will not require further calibration or alarm adjustment.
3
Summary of Contents for HR-1D-7-EW
Page 11: ...Wiring Diagram 8...
