ROTRONIC HP23-AW-A - Manual (Page 32)

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 32 of 37
Document title
© 2009-2012; Rotronic AG E-M-HP23-V2_13
6 Maintenance
6.1 Replacing the battery
To replace the battery, turn the latching button counter-clockwise and pull out the battery holder.
6.2 Connecting the HP23 to a PC
Any USB cable (mini-USB connector at one end) can be used to connect the HP23 to a USB port of a PC
running the ROTRONIC HW4 software. Prior to connecting the HP23, the ROTRONIC USB driver must be
installed on the PC. Both the driver and the installation instructions (document E-M-HW4v3-Main) are located
on the HW4 CD.
6.3 Location of the service connector (mini USB type)
The service connector is a USB port and can be
accessed without opening the enclosure after removing
the protective red round cover.
6.4 Periodic calibration check of the HygroClip 2 probe
Both the Pt 100 RTD temperature sensor used in the probe and associated electronics are very stable and
should not require any calibration after the initial factory adjustment. Long term stability of the ROTRONIC
Hygromer humidity sensor is typically better than 1 %RH per year. For maximum accuracy, calibration of the
probe should be verified every 6 to 12 months. Applications where the probe is exposed to significant pollution
may require more frequent verifications.
The procedures for using the HP23 to calibrate and adjust a probe, a transmitter or any other device are
described in the Calibrator Function chapter of this manual.