ROTRONIC HC2-AW-USB - Manual (Page 7)

E-M-HC2-AW-USB-V1_11
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
Water Activity and Temperature Probe
HC2-AW-USB: User Guide Instruction Manual
Document Type
Page 7 of 18
Document title
© 2011-2012; Rotronic AG E-M-HC2-AW-USB-V1_11
4. Start HW4. In the HW4 main menu bar click on Devices and Groups > Search for Master Devices >
USB Masters. After being discovered by HW4, the probe appears in the left pane of the HW4 main
screen (device tree). Select the probe with the mouse to make the values currently measured by the
probe appear in the right pane of the HW4 main screen.
5.2 Preparation of the product samples
The HC2-AW-USB probe is designed for use with the WP-40S sample holder with removable depth reduction
insert.
The WP-40S sample holder can be used with two different sizes of disposable sample cups (PS-14: shallow /
PS-40: deep). Use the shallow sample cups (PS-14) together with the depth reduction insert. The PS-14 cups
are suitable for calibrating the probe with the Rotronic certified humidity standards or with saturated salt
solutions. In general, use the shallow cups for a liquid, a paste or a powder. Use the PS-40 deep sample cups
for products in bulk (large chunks).
The disposable sample cups serve two purposes:
(a) Provide a means storing product samples prior to measurements so that they can come to the same
temperature as the probe.
(b) Prevent contamination across samples.
Prior to measurements, fill a number of disposable sample cup with the products to be measured. Usually,
filling up to 1/3 of the cup is sufficient. To avoid soiling the probe, do not fill the cup above the fill line (see
below).