Sentry II with Water Works Box Operating Instructions Effective April 1, 2000
Part No. 8823728 Revised November 10, 2003
9. Press the key a second time to return to the temperature display.
10. Lock the temperature control by pressing and holding the and ▲ keys simultaneously for
four seconds. When released the display will blink once indicating a successful lock, otherwise
repeat the process. To validate a locked condition, press the key once, when released the
display will momentarily display Lock.
EXAMPLE:
If the known product temperature was 37°F and the temperature control displayed 39°F, a correction
factor of -2°F would be required for calibration.
Starting at step 5 of the above instructions, you would perform the following procedure:
• Press and release the ▲ or ▼ key to cycle to the second digit (000.0)
• Press and hold the ▲ key until 2 (002.0) is displayed.
• Press and release either the ▲ or ▼ key to cycle to the first digit (002.0).
• Press and hold the ▼ key until – negative is displayed (–02.0).
• Press the key once to enter the change.
• Press the key a second time to return to the temperature display.
• Lock the temperature control by pressing and holding the and ▲ keys simultaneously for
4 seconds. When released the display will blink once indicating a successful lock, otherwise
repeat the process.
4.8 Sentry II Temperature Control Set Point Adjustment
The temperature control is factory programmed at 38°F (3.3°C) with a 1°F differential on rise and fall of
temperature. This setting turns the refrigeration off at 37°F (2.8°C) and on at 39°F (3.9°C).
The high and low temperature alarms are activated at 3°F above and 3°F below the programmed
temperature set point.
NOTE: The minimum and maximum set-point adjustments are regulated between 36-41°F (2.2-5.0°C).
1
Factory setting.
29
Programmed Refrigeration Refrigeration High-Temp Low-Temp
Set Point ON OFF Alarm Alarm
36°F (2.2°C) 37°F (2.8°C) 35°F (1.7°C) 39°F (3.9°C) 33°F (0.6°C)
37°F (2.8°C) 38°F (3.3°C) 36°F (2.2°C) 40°F (4.4°C) 34°F (1.2°C)
38°F (3.3°C)
1
39°F (3.9°C)
1
37°F (2.8°C)
1
41°F (5.0°C)
1
35°F (1.7°C)
1
39°F (3.9°C) 40°F (4.4°C) 38°F (3.3°C) 42°F (5.5°C) 36°F (2.2°C)
40°F (4.4°C) 41°F (5.0°C) 39°F (3.9°C) 43°F (6.0°C) 37°F (2.8°C)
41°F (5.0°C) 42°F (5.5°C) 40°F (4.4°C) 44°F (6.6°C) 38°F (3.3°C)
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