Lufft WS600-UBM User Manual

Operating Manual Smart Weather Sensor
G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany 63
Figure 36: Setting the
Leaf Wetness
Threshold
18.1.2 Setting the Leaf Wetness Threshold
The leaf wetness sensor will, depending on the degree of wetness on the surface of the
sensor leaf, output a voltage between ca. 500mV and 1200mV (UMB-Channel 710). The
state wet / dry (UMB- Channel 711) is evaluated from this voltage using an adjustable
threshold.
The threshold is pre-set to 580mV (factory setting). It should be checked after installation
and, if necessary, adjusted.
Use the UMB Config Tool to measure channel 710 and collect values of the dry sensor for
about 10min (see chapter 10.3 Function Test with UMB Config Tool).
The dry leaf value measured should be constant over the measurement interval. We
recommend to set the threshold about 20mV higher than the dry leaf voltage:
Example: measured (dry leaf): 577mV threshold setting597mV
The threshold value thus evaluated is set into the configuration using the UMB Config Tool.
Note: We recommend to check the threshold during maintenance and to adjust it if
necessary. For the dry leaf measurement the sensor should be cleaned with clear water and
carefully dried.

Lufft WS600-UBM Specifications

General

Brand	Lufft
Model	WS600-UBM
Category	Accessories
Language	English