Instruction Manual
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  21 of 51 
© 2006; Rotronic AG  IN-E-HyLab-V4_11 
6.3  DISPLAY (HygroLab 2 and 3) 
Definition 
This function is used to select which parameters the instrument displays. The display mode is 
specified globally for all probes connected to the instrument. 
Selections 
-  Measurement 
Relative humidity (in %RH or as water activity: Aw) and temperature or the parameter 
measured by any third party probe connected to the instrument. 
-  Calculated + Temperature 
Calculated parameter (as selected under CALCULATE) and temperature. This selection is 
not available with third-party probes. 
-  Calculated + Humidity 
Calculated parameter (as selected under CALCULATE) and relative humidity. This 
selection is not available with third-party probes. 
-  User Calc 
User defined calculation such as the difference between temperature and dew point of any 
probe. The display shows only the calculated value. See the separate HW4 manual for 
instructions on how to program the HygroLab 2 or 3 to compute a user specified 
parameter. 
6.4  ADJUST M.PT 
Definition 
The Adjust M.PT function permits the full calibration of any ROTRONIC HygroClip digital probe 
against a known reference environment. This function is designed to permit calibration at 2 
temperature values and at up to 4 relative humidity values. 
Selections 
The Adjust M.PT 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 to generate 
known humidity values (for details, see Humidity Calibration). 










