ROTRONIC HP23-AW-A - Manual (Page 5)

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 5 of 37
Document title
© 2009-2012; Rotronic AG E-M-HP23-V2_13
o The HW4 software is required to download and view the recorded data
 Calibrator function:
The HP23 can be used as a calibrator for all of the ROTRONIC HygroClip 2 devices (probe,
transmitter or other) and allows to do the following:
o
Display the measurement data from the device on the HP23.
o 1-point humidity and/or temperature adjustment of the device connected to one of the HP23
probe inputs against the HygroClip 2 probe connected to second probe input of the HP23
(reference probe).
o 1-point or multi-point humidity adjustment as well as a 1-point or 2-point temperature adjustment:
against a known reference environment.
► Aw Mode:
this specialized mode is available only with model HP23-AW and is used for measuring the
water activity (Aw) of product samples and materials in bulk such as powders, seeds, etc. When set to operate
in the water activity mode, the HP23 automatically displays humidity as Aw (1.000 a
w
= 100 %RH). The Aw
Mode offers the following options:
 Accelerated water activity measurement (AwQuick): permits measuring the water activity of
most products in typically 5 minutes. The measurement starts simultaneously for both probe inputs
and is ended automatically.
 Conventional water activity measurement (AwE): the measurement starts simultaneously
for both probe inputs. The HP23 automatically detects full equilibrium conditions and ends the
measurement at that time.
Data logging and probe adjustment are available in the water activity mode, but when using these functions
humidity is shown as %RH as opposed to a
w
. The other standard mode functions are not available.
The HP23 is available with a wide assortment of HygroClip 2 humidity-temperature probes to meet almost any
requirement. The HygroClip 2 probes feature well proven, durable sensors. Digital signal processing ensures
consistent product performance and also facilitates the task of field maintenance with features such as
potentiometer free – digital calibration.
Depending on the probe model, the HP23 can measure conditions within the range of 0 to 100 %RH and -100
to 200
°C (-148 to 392°F). The temperature operating range of the HP23 electronics is limited to -10…60°C.
The ability for the user to easily update both the HP23 and HygroClip 2 probe firmware means that the
indicator and probes can be kept up-to-date regarding any future functionality improvement.