WIKA operating instructions models LSO.06, LSO.25
27
13334603.01 09/2010 GB/D/F/E
7. Configuration
GB
7.2 Adjustment with CAL
This is only required at the first putting into operation or after the wiring to compensate for
all variable influences of the measuring equipment.
Calibrate only when the sensor tip is in the medium with higher refractive index, e. g.:
■
Level
liquid/gas
= in the liquid
■
Separation layer
e. g. water/oil = in oil
The photo transistor voltage can be measured between "GN" and "WS" of the transducer
connection with a voltage instrument (Ri ≥ 10 MOhm Messbereich 10 V=).
Voltage between GN / WS in V
dry
1)
immersed
Level (conical tip)
0.2 - 1.0
2)
4.5 - 6
3)
1) do not adjust, only check this value
2) 0.2 V at short measuring lengths and clean conical tip, up to 1.0 V at larger measuring lengths and
dirty conical tip.
3) adjust this value in the immersed condition only, the switching quality of the system transducer/
switching amplifier can be influenced by variation of this value:
■
approx. 4.5 V = less drop sensitive, foam insensitive
■
approx. 5.0 V = normal low viscous, clean application, no influence of temperature fluctuations
of
the medium up to ±25 °C
■
approx. 5.5 V = at strong temperature fluctuations of the medium up to ±40 °C
■
approx. 6.0 V = detektion of condensation, foam (must have stable, reproducible qualitiy)
Voltage between GN / WS in V
dry
(lower refractive index)
4)
immersed
(higher refractive index)
Separation layer (U-tip)
0.2 - 3.0
5)
4.5 - 6
6)
4) do not adjust, only check this value
5) the tension takes off two media and at this measuring of the refractive index difference can there-
fore vary strongly.
6) adjust this value only when the sensor tip is immersed from the medium with higher refractive
index.The switching quality of the system sensor/amplifier can be influenced by variation of this
value.
To get a stable measuring it should be tried to adjust a difference as big as possible between these
two values
