ROTRONIC HP23-AW-A - Manual (Page 6)

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 6 of 37
Document title
© 2009-2012; Rotronic AG E-M-HP23-V2_13
2 General description
2.1 Configuration software
Most of the HP23 settings can be configured directly from the keypad. However, some of the settings and
access to some of the functions requires connecting the HP23 to the USB port of a PC running the HW4
software version 3.0 or higher. For instructions see the following HW4 manual: E-M-HW4v3-F2-012
2.2 Power supply
The HP23 uses either a standard 9V alkaline battery (factory default) or a 9V rechargeable Ni-MH battery
(user configuration).
The rechargeable battery is charged either by connecting the service connector to a USB port or by plugging a
battery charger (part number AC1212) to the service connector. The typical charge current is 17 mA.
Important: the HP23 is shipped with a regular 9V battery and is factory preset with the battery charge
function turned off. If you plan on using a rechargeable battery, you should turn on the battery charge function
(see Function Menu – Settings). Before using a regular battery again, be sure to turn off the battery charge
function. Trying to charge a regular battery may cause the battery to burst and may damage the instrument.
With the default display refresh rate is 1 second the probes are permanently powered. To conserve battery
power, the display refresh rate can be set from the HP23 keypad to one of the following: 10 sec, 1 min or 10
min. (MENU > Device Settings > DataUpdate). The autonomy of the HP23 with a fully charged battery
depends on factors such as the display backlight, the number of probes, the display refresh rate, the functions
being used, etc. As an indication, the typical current consumption is as follows: 6.5mA with 1 probe and 20mA
with 1 probe + backlight.
WARNING: the display refresh rate setting can affect the data logging function of both the HP23 and probe
2.3 Probe inputs
The HP23 has two probe inputs. Using the HW4 software (Device Manager), each probe input can be
configured to accept one of the following:
o HygroClip 2 humidity-temperature digital probe. Any input configured to accept a HygroClip 2 digital probe
can also be used to read and adjust an instrument or device that is based on the AirChip 3000 technology
(use service cable AC2001).
o 1-channel analog probe (general): To be compatible with the HP23 the analog probe must meet the
following requirements: supply voltage: max. 5 VDC, current consumption: max. 10 mA, output signal: 0
to max. 3.3 VDC. The HP23 uses a 12-bit A/D converter to digitize the probe analog signal and can be
configured to measure practically any parameter.
o Analog pressure probe: this is a special case of analog probe and is subject to the same compatibility
requirements. When analog pressure probe is selected, the HP23 automatically uses the signal from the
probe to calculate any humidity parameter that requires barometric pressure as an input value (example:
mixing ratio).