ROTRONIC HP23-AW-A - Manual (Page 19)

E-M-HP23-V2_13
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
HygroPalm HP23-A / HP23-AW-A hand-held
indicator:
User Guide
Instruction Manual
Document Type
Page 19 of 37
Document title
© 2009-2012; Rotronic AG E-M-HP23-V2_13
4.6.5 Set input 1 or 2 for a digital or analog probe
Press the MENU key and select Device Settings > Input 1 or Input 2 > Pbe Type. Press ENTER to activate the
Pbe Type menu item, use the UP or DOWN arrow key to change the probe type. Press ENTER to confirm and
press MENU to exit.
When using an analog probe, be sure to define both the voltage signal range and the measuring range of the
probe. HW4 is required to define the unit of measurement of an analog probe.
The HW4 software can also be used to change the probe type for each input.
4.7 Practical advice for measuring humidity
The most common source of error when measuring relative humidity is a difference between the temperature
of the probe and the temperature of the environment. At a humidity condition of 50 %RH, a temperature
difference of 1
°C (1.8 °F) typically results in an error of 3 %RH on relative humidity.
When using the HP22 hand-held indicator, it is good practice to monitor the display for temperature stability.
The probe should be given sufficient time to equilibrate with the environment to be measured. The larger the
initial temperature difference between the probe and the environment to be measured, the more time
temperature equilibration requires. This time can be shortened, and errors avoided, by using the probe
configuration that fits best for your application.
In extreme situations, condensation may occur on the sensors when the probe is colder than the environment.
As long as the humidity / temperature limits of the humidity sensor are not exceeded, condensation does not
alter the calibration of the sensor. However, the sensor has to dry out before it can provide a valid
measurement.
Non-moving air is an excellent insulator. When there is no air movement, surprising differences in temperature
and humidity can noted over short distances. Air movement at the probe generally results in measurements
that are both faster and more accurate.
5 Using the HP23 functions
5.1 Data capture
Manual data capture is available only in the HP23 standard operating mode. Data cannot be manually
captured when the HP23 is in the AW mode.
Up to 250 relative humidity and temperature records can be manually captured to each of the 8 data-bins. The
captured data is automatically date and time stamped. The calculated parameter cannot be captured. A
descriptive name can be given to each data-bin with the HW4 software (laboratory, warehouse, etc.)
Note: a descriptive name (laboratory, warehouse, etc.) can be given to each data-bin with the HW4 software
5.1.1 Capturing data
o Use the UP or DOWN arrow key to select the probe
o Select the data-bin with the UP or DOWN arrow key
o Press the ENTER key to activate the Data Capture function
o Data capture is confirmed on the HP23 display
o Wait a few seconds or press MENU to EXIT the Data Capture function