1. Place an accurate independent instrument in the center of the
chamber. Allow at least 30 minutes for RH to stabilize.
2. Press the Mode key until the Cal indicator lights.
3. Press the right arrow key until “RH CAL XX” appears in the message
center.
4. Press the up/down arrow to match the display to the independent
instrument.
5. Press Enter to store the calibration.
6. Press the Mode key to return to Run mode.
If a reliable RH measuring device is not available, the display may be
calibrated to a typical level.
1. Follow the RH stabilization periods outlined previously.
2. With a full humidity pan and stable temperature, the relative humidity
in the chamber will be 95%.
3. Using Step 3-5 of the relative humidity sensor adjustment, adjust the
display to 95%.
This calibration method should be accurate to within 5%.
Model 310 Series DH Incubator 2-5Thermo Scientific
Section 2
Calibration
Calibrating Relative
Humidity (continued)
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