ROTRONIC HygroLab - Manual (Page 23)

IN-E-HyLab-V4_11
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
Instruction Manual
Document Type
HygroLab bench top indicator version 4:
instruction manual
Document title
Page 23 of 51
© 2006; Rotronic AG IN-E-HyLab-V4_11
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 or MENU to return to the function Adjust
M.PT and do another calibration point.
Carry on in the same manner for each calibration point, following the sequence described above.
Note: you can exit the function at any time (without calibrating the probe) by pressing the MENU
key.
6.5 ADJUST 1PT
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 Humidity Calibration).
Procedure
When more than one probe is connected to the instrument, select the probe to be calibrated prior
to entering the function (this is the same as the probe that was last displayed).
When the probe is at equilibrium with the reference environment, 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 ▼ or ▲ 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.