Omega CT485B-110V-G-AL, Руководство пользователя

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Calibrating the Recorder
5-1
5
5.1 Factory Calibration Information
The recorder is factory calibrated during final assembly by calibrating the sensor
(shipped with the recorder) to known temperature and humidity standards in an
environmental chamber. This technique avoids tracking and positioning errors
due to temperature changes and mechanical shock. However, if the humidity
readings drift or appear out of calibration, follow Section 5.2 to recalibrate your
recorder.
5.2 Changing Calibration Codes
You may want to change the calibration codes for several reasons:
• The calibration codes on the sensor probe and the recorder do not match.
• A replacement probe is being used, and the calibration codes must be
changed to match.
• You want the recorder to more closely match the reading of another
instrument.
• You wish to perform your own recalibration. In this case, go through
Sections 5.3 and 5.4, Calibrating Humidity Readings and Calibrating
Temperature Readings.
To change the calibration codes:
1. Open the control panel door (unlock it, if necessary).
2. Turn the power switch to the off (“O”) position.
3. Press and hold down the “SET” button while turning on the power switch. This
button is one of three Alarm buttons shown in Figure 4-5.
After you hear an audible beep, you will see the following display:
Figure 5-1. First Display
Then “CH” appears on the display.
4. At this time, release the “SET” button.
RH
°
F
°
C
LO BAT