Dwyer HM28 User Manual
Page 14
14
8
Calibration instructions
Recalibration to be carried out by
specially skilled staff only!
Actuate the following key combinations:
• First press MODE and keep it
pressed
• Next and additionally, press CLEAR/
ZERO and keep pressed until
CALIBRATION is displayed
Exit from this mode is possible at any time via
MODE or OFF.
The instrument must be in operation for at
least 30 minutes (warm up stabilization time).
New calibration values are only stored
when all five setpoints have been
running through correctly and
Calibration at 22 °C (71,6 °F) environmental temperature
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acceptable values acquired. In the
event of a maloperation, the calibration
process is interrupted and the previous
calibration data are retained.
An incorrect internal instrument tempera-
ture can lead to accuracy fluctuations!
The pressure set points have to be set in
[mbar]!
Check the instrument accuracy after
recalibration!