ROTRONIC HF7 - Manual (Page 7)

E-M-HF7-V1_24
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
HygroFlex HF7 Humidity Temperature
Transmitters: User Guide Instruction Manual
Document Type
Page 7 of 23
Document title
© 2009-2011; Rotronic AG E-M-HF7-V1_24
3.7 Sensor protection (dust filter)
A dust filter is required to protect the sensors against dust particles and high air velocity. The probe of the HF7
is equipped with a with a metal filter base mod. NSP-ME. The filter cartridge must be ordered separately (see
Accessories 11.5). Filter cartridge mod. SP-M15 is suitable for most applications.
4 User configurable settings and functions
The HF7 ships configured as specified on the customer order. The analog outputs can be used just as with
any conventional humidity and temperature transmitter and most users will never need to use the HF7
configurable settings and functions.
Making use of the HF7 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 HF7 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 or with the instrument display (if available) and is
shown as Good, SQ-tuned (corrected for drift) or Bad (defective)
► Data recording The data recording function differs from a true data logging
function in the sense that the AirChip 3000 does not time stamp
the data. This data recording function can be used to investigate
events such as a sensor malfunction as well as to retrieve data
that would otherwise be lost
o Start or stop data recording - up to 2000 value pairs (%RH
and temperature). Starting a recording session erases all
previously recorded data
o The recording mode and log interval can be specified
o When the device is powered off, the recording session is
paused but not ended As long as the recording session has
not been ended, the device automatically resumes recording
data when powered up again
o The recorded data can be downloaded to a PC with the
HW4 software, time stamped and viewed