ROTRONIC HM4 - Manual (Page 30)

E-M-HM4-V0_08
ROTRONIC AG
Bassersdorf, Switzerland
Document Code Unit
HM4 Humidity and Temperature Probe with
Heated Sensor
Instruction Manual
Document Type
Page 30 of 41
Document Title
© 2014; ROTRONIC AG E-M-HM4-V0_08
8.2 Calibration
Both the Pt100-RTD temperature sensor used in the probe and the corresponding electronics are very stable
and do not normally need to be calibrated after initial factory calibration. The long-term stability of the SMD
Thermo humidity sensor from ROTRONIC is normally better than 1 %RH per year. For maximum accuracy,
the calibration of the humidity probe should be checked every six to 12 months. Applications in which the
humidity probe is exposed to considerable contamination could require more frequent checks.
Start the HW4 software and look for the connected HM4 probes (HW4 Menu > Devices and Groups >
Search for Devices > Search for USB Master or Search for Ethernet Master)
The device tree of the HM4 lists all calibration and adjustment functions. The basic guidelines for
calibration and adjustment are described in the manual E-M-CalBasics.
Further instructions are to be found in the HM4 software manual E-M-HW4v3-A2-001.
IMPORTANT:
All heating and cleaning functions must be switched off during calibration and adjustment!
DRAFT