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in_hypalm_aw1_v3.doc
Selections
The Adjust 1PT function offers the following choices (use the UP and DOWN keys):
RHS
:
Humidity calibration using the ROTRONIC Humidity Standards
1)
Humidity
:
Humidity calibration using any suitable reference environment
Temperature
:
Temperature calibration using any suitable reference environment
1) For humidity calibration, ROTRONIC offers convenient, certified humidity standards that generate known
humidity values (for more details, see Appendix 3 - Humidity Calibration).
Procedure
Prior to using the Adjust 1PT function, monitor the water activity and temperature readings in the
Standard Mode. Wait for the trend indicators to show stable conditions both for water activity and
temperature. When the probe is at equilibrium, activate the Adjust 1PT function and make the
appropriate selections:
a)
RHS
: press the ENTER key to select this item. The LC display shows the value read by
the probe at the time the ENTER key was pressed. The letters “RHS” are displayed on
the message line. Use the UP or the DOWN key to change the humidity value to match
the mean value (at 23
q
C) written on the certificate supplied with the standard. For a faster
change, keep the key pressed down. Press the ENTER key when done.
Note: in the RHS mode, the software automatically compensates for the effect of
temperature on the humidity standard. No additional correction is required.
b)
Humidity or Temperature
: press the ENTER key to select. The LC display shows the
value read by the probe at the time the ENTER key was pressed. The word “humidity” or
“Temperature” is shown on the message line. Use the UP or the DOWN key to change
the humidity or temperature value to the value of the reference environment. For a faster
change, keep the key pressed down. Press the ENTER key when done.
After pressing the ENTER key, the message “sure?” should appear on the LC display. Press
ENTER to confirm. Next, the LC display will confirm that the probe adjustment has been
successfully completed. At that time, press ENTER to exit.
Note: you can exit the function at any time (without calibrating the probe) by pressing the MENU
key.
