E-M-HP21-V1_21
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroPalm HP21 hand-held indicator:
User Guide
Instruction Manual
Document Type
Page
4
of 14
Document title
© 2009-2010; Rotronic AG E-M-HP21-V1_21
2.5 Service connector
The service connector is a UART digital interface (Universal Asynchronous Receiver Transmitter) with a mini-
USB type connector. This allows connecting the HP21 either to a PC running the ROTRONIC HW4 software
or to a probe input of another instrument that is compatible with the HygroClip 2 (HC2) probes. In both cases a
service cable is required.
See “Maintenance” for the location of the service connector and for the type of
service cable to be used.
Connecting the HP21 to a PC is used to configure the HP21, gain access to the HP21 functions such as
humidity and temperature adjustment, read data from the HP21 on the PC and update the AirChip 3000
firmware.
Connecting the HP21 to another instrument is useful only when the other instrument has its own display
and keypad, and has a more powerful internal menu than the HP21 (example HP23 hand-held calibrator).
This allows showing the data measured by the HP21 on the other instrument display and also allows using
the other instrument internal menu to do for example a humidity and temperature adjustment of the HP21.
3
User configurable settings and functions
The HP21 can be used just as any conventional humidity and temperature indicator and most users will never
need to use the HP21 configurable settings and functions.
Making use of the HP21 configurable settings and functions is entirely up to the user and the appropriate
settings depend on the user application. We have provided below a short description of the HP21 functions
and also indicated the factory default settings.
3.1 Function overview
MEASUREMENT ACCURACY AND RELIABILITY
AirChip 3000 Functions
Description
► Humidity / temperature adjustment
o
1-point or multi-point humidity calibration or adjustment
o
1-point or 2-point temperature calibration or adjustment
o
Generate a time stamp for calibrations and adjustments
o
Retain and view last adjustment date and adjustment values
o
Generate calibration and adjustment protocols
► Automatic humidity sensor test
and optional drift compensation
Tests the humidity sensor for drift caused by contaminants and
can be used to automatically apply a correction. The test is
automatically carried out at regular intervals of time. Can be
configured, enabled, or disabled
The humidity sensor status can be verified either with the HW4
software or with the instrument display and is shown as Good,
SQ-tuned (corrected for drift) or Bad (defective)
