ROTRONIC HF3 - Manual (Page 7)

E-M-HF3-V1_22
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
HygroFlex HF3 Transmitters and Thermo-
hygrostats: User Guide Instruction Manual
Document Type
Page 7 of 27
Document title
© 2009-2011; Rotronic AG E-M-HF3-V1_22
3.6 Service connector
The service connector is a UART digital interface (Universal Asynchronous Receiver Transmitter) with a mini-
USB type connector. This allows connecting the HF3 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 HF3 to a PC is used to configure the HF3, gain access to the HF3 functions such as
humidity and temperature adjustment, read data from the HF3 on the PC and update the AirChip 3000
firmware.
Connecting the HF3 to another instrument is useful only when the other instrument has its own display and
keypad (example HP23 hand-held calibrator). The connection allows showing the data measured by the
HF3 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 HF3.
3.7 Sensor protection (dust filter)
With the exception of models with the S configuration, the HF3 is supplied with a Polyethylene filter to protect
the sensors against dust particles and high air velocity.
4 User configurable settings and functions
The HF3 ships configured as specified on the customer order. The HF3 can be installed and used just as any
conventional humidity and temperature transmitter and most users will never need to use the HF3
configurable settings and functions.
Making use of the HF3 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 HF3 functions and
also indicated the factory default settings.
4.1 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 and is shown as Good, SQ-tuned (corrected for drift) or
Bad (defective)