Manual

E-M-HM-V1_12
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
HygroMet MP Humidity Temperature
Meteorological Probe: User Guide
Instruction Manual
Document Type
Page
15 of 20
Document title
© 2009-2011; Rotronic AG E-M-HM-V1_12
8.2 Location of the service connector (mini USB type)
WARNING: the service connector is a UART interface with a mini-USB connector type. Do not connect the
service connector directly to the USB port of a PC or hub.
The service connector is located on the PCB of the HygroMet MP. To gain access to the service connector
proceed as follows:
a) Unscrew the curly cable grip from the barrel of the HygroMet MP
b) Slide back the sealing grommet over 15 cm (6”) of cable
c) Unscrew the barrel from the bulkhead of the HygroMet MP
d) Pull the barrel back to uncover the PCB
8.3 Periodic calibration check of the HC2-S3 probe
Both the Pt 100 RTD temperature sensor used in the HC2-S3 probe 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 probe should be verified every 6 to 12 months. Applications
where the probe is exposed to significant pollution may require more frequent verifications.
Note
: the HC2-S3 2 probe cannot be adjusted when connected to the HygroMet 2-wire version
Using the HW4 software to adjust the probe connected to the HygroMet MP (3-wire version only):
• Use cable AC3006 to connect the service connector of the HygroMet MP 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.
• Power the HygroMet MP from a DC voltage source
• Start HW4 on the PC and search for the HygroMet MP (HW4 Main Menu Bar > Devices and Groups
> Search for USB Masters).
• After finding the HygroMet MP with HW4, expand the device tree to see the HygroMet MP functions.
Select Probe and Probe Adjustment.
• For further instructions see HW4 manual E-M-HW4v3-A2-001
8.4 Cleaning or replacing the probe dust filter
See document E-M-HC2 Probes-V1
8.5 Validation of the output signals transmission
If so desired, transmission of the HygroMet MP 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 HygroMet MP generates fixed digital and analog signals as specified by the user. For instructions see
document E-M-HW4v3-F2-014
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: