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in-hypalm-v40 / 20051205
ADJUST 1PT (1-point adjustment against a reference environment)
Definition
The Adjust 1PT function permits to do a 1-point adjustment (temperature or humidity) of any ROTRONIC
HygroClip digital probe against a known reference environment. This function is limited to a simple offset
adjustment that is applied across the entire measuring range.
Warning
: a 1-point adjustment is no substitute for a full calibration (2 or more points). Doing a 1-point
adjustment can improve accuracy over a narrow range of conditions and may also be detrimental to
accuracy at other conditions.
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
When more than one probe is connected to the instrument, select (display) the probe to be calibrated
prior to entering the function.
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°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
1
: 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.
1
1-point temperature adjustment: limited by the firmware to -20…< 40°C (-4…<104°F)
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.
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