7340_7350-25-33 Series Operations Manual
Rev J 3-31-21
Page 50 of 92
Calibrating Humidity
If humidity calibration is needed, the following steps can be taken:
Locate the reference instrument’s humidity sensor in close proximity to the cabinet’s
geometric center. Be sure that the stabilization times described earlier have been
satisfied prior to performing this calibration.
A positive value will move the humidity ‘up’ and a negative value ‘down’. Press the
‘home’ button and verify the proper humidity is displayed.
Humidity calibration (example)
If the chamber humidity display reads 80% and the calibrated independent sensor
shows 83%, set the humidity offset value to 3.0%. If the calibrated independent sensor
shows 74%, then the entered offset should be negative. In this example the required
offset to humidity would be -6.0%.
Calibrating Optional Chart Recorders
For calibrating the optional front and side mounted chart recorders, refer to section
(Optional Accessory Operation)
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