ROTRONIC HF3 - Manual (Page 22)

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 22 of 27
Document title
© 2009-2011; Rotronic AG E-M-HF3-V1_22
8.3 Periodic calibration check
Both the Pt 100 RTD temperature sensor and associated electronics are very stable and should not
require any calibration after the initial factory adjustment.
Long term stability of the ROTRONIC Hygromer humidity sensor is typically better than 1 %RH per year.
For maximum accuracy, calibration of the HF3 should be verified every 6 to 12 months. Applications
where the HF3 is exposed to significant pollution may require more frequent verifications. Calibration and
adjustment of the HF3 can be done with either a PC with the HW4 software installed or with another
instrument such as the HP23 hand-held calibrator.
Procedure for calibrating or adjusting the HF3 with the ROTRONIC HW4 software:
o Use the appropriate model of service cable (see Maintenance > Service Cable) to connect the
service connector of the HF3 to a USB port of a PC with the HW4 software installed. Note that the
ROTRONIC USB driver must be installed on the PC as explained in the HW4 manual E-M-HW4v3-
Main
o Start HW4 on the PC and search for the HF3 (HW4 Main Menu Bar > Devices and Groups > Search
for USB Masters).
o After finding the HF3 with HW4, expand the device tree to see the HF3 functions.
Select Probe Adjustment. Instructions for using the ROTRONIC calibration devices and humidity
standards are provided in document E-M-CalBasics
o For further instructions see HW4 manual E-M-HW4v3-A2-001
8.4 Cleaning or replacing the dust filter (type D and W)
Depending on the application, the dust filter may require cleaning from time to time, Cleaning should be done
without removing the filter from the probe. Clean the filter with a fine brush. If this is not sufficient, the filter
should be replaced. To do this, unscrew the filter from the probe. Before putting on a new dust filter, check the
alignment of both sensors with the probe. The wires that connect the sensors to the probe are very thin and
bend easily. If this happens, correct the alignment by holding the sensor very gently with a pair of small flat
nosed pliers.
8.4.1 Validation of the output signals transmission
If so desired, transmission of the HF3 output signals can be validated by using the simulator function. The
HW4 software is required to enable and configure this function. When this function is enabled the HF3
generates fixed digital and analog signals as specified by the user. For instructions see HW4 manual
E-M-HW4v3-F2-002
9 Firmware updates
Firmware updates will be available on the ROTRONIC website for downloading. Firmware files are given a
name that shows both to which device the file applies and the version number of the firmware. All firmware
files have the extension HEX. Procedure for updating the firmware:
Use the appropriate model of service cable (see Maintenance > Service Cable) to connect the
service connector of the HF3 to a USB port of a PC with the ROTRONIC HW4 software installed.
Note that the ROTRONIC USB driver must be installed on the PC as explained in the HW4 manual
E-M-HW4v3-Main
Copy the firmware update file from the ROTRONIC website to the PC.
Start HW4 software on the PC and search for the HF3 (HW4 Main Menu Bar > Devices and Groups
> Search for USB Masters).
After finding the HF3, expand the device tree to see the HF3 functions. Select Device Manager. In
the Device Manager menu bar select Tools > Firmware Update. For instructions see HW4 manual
E-M-HW4v3-F2-002
HF32