6 Commissioning
Unit NTU (optionally FNU)
NTU (Nephelometric Turbidity Unit) is a unit of measurement for measuring the
turbidity of liquids. Alternatively, the measurement can be expressed as FNU
(Formazine Nephelometric Unit), see
Ä „Units“ on page 48
. The calculation is
undertaken 1:1.
Measured values over 1000 NTU are outside of the sensor's measurement
range. Measured values over 1100 NTU cause the display to flash and a mes‐
sage to be displayed warning of excessive measured values.
During normal operation of the sensor, an arrow is positioned next to
[AUTO]
.
In this state, the lower row indicates the unit of measurement and the upper row
shows the current measured value.
Fig. 7: Display in automatic mode
6.1 Load drying agent
Remove transport mounting
The transport mounting must be removed before initial insertion of the drying
agent bag. This pipe can be subsequently disposed of.
Commissioning
30
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