Endress+Hauser Mycom CLM 152 Operating Instructions Manual page 45

Mycom CLM 152
1)
Sensor MR 1
µ
CLS 50
0 – 200.0 S/cm
µ
max. TD
20.0 S/cm
µ
CLS 52 S/cm 2.00 – 20.00 mS/cm 20.0 – 200.0 mS/cm
0 – 2000
µ
max. TD
200 S/cm
k = 0.01 0.0 – 200.0 nS/cm 0.200 – 2.000
max. TD 20.0 nS/cm
µ
k = 0.1
0.000 – 2.000 S/cm
µ
max. TD
0.200 S/cm
µ
k = 1
0.00 – 20.00 S/cm
µ
max. TD
2.00 S/cm
µ
k = 10
0.0 – 200.0 S/cm
µ
max. TD
20.0 S/cm
Ω
k = 0.01
20.0 – 200.0 k cm
Ω
max. TD 20.0 k cm
Ω
k = 0.1 2.00 – 20.00 k cm
Ω
max. TD 200 k cm
Ω
k = 1 0.200 – 2.000 k cm 2.00 – 20.00 k
Ω
max. TD
0.200 k cm
1) The measuring range is adapted automatically to achieve maximum precision and resolution via the internal switching steps.
Conductivity factory setting:
0/4 mA → 0 mS
20 mA → MR end value
Example: Measuring range allocation of a sensor with CLS 52, rising characteristic
• The measuring range is determined by
defining the conductivity values at 0 mA,
4 mA and 20 mA.
• The difference between the 20 mA value
and the 0/4 mA value must be greater than
the current output spread TD of the
switching step in which the 20 mA value is
located.
B) Bilinear current output signal characteristic
20
Current at knee point: 50 %,
i.e.12 (10) mA
12
(10)
4
(0)
0
Endress+Hauser
1)
MR 2 MR 3
Conductivity
µ
S/cm 2.00 – 20.00 mS/cm 20.0 – 200.0 mS/cm
200 – 2000
µ
2.00 mS/cm
200 S/cm
2.00 mS/cm 20.0 mS/cm
µ
S/cm 2.00 – 20.00
µ
0.200 S/cm 2.00
µ
2.00 – 20.00 S/cm 20.0 – 200.0
µ
2.00 S/cm 20.0
µ
20.0 – 200.0 S/cm 200 – 2000
µ
20.0 S/cm 200
µ
S/cm 2.00 – 20.00 mS/cm 20.0 – 200.0 mS/cm
200 – 2000
µ
2.00 mS/cm
200 S/cm
MΩ
2.00 – 20.00 M
Ω
200 – 2000 k cm
Ω
200 k cm 2.00 M
Ω
20.0 – 200.0 k cm 200 – 2000 k
Ω
200 k cm 200 k
Ω
cm 20.0 – 200.0 k
Ω
2.00 k cm 20.0 k
Factory setting MΩ
0/4 µA → MR start value
20 mA → MR end value
• If 300 µS/cm is specified for the 20 mA
value, the 0/4 mA value must be at least
200 µS/cm (TD for switching step 1)
smaller.
• Possibilities
or
but not
Meas. value
for knee point
20 40 60
1) 1)
MR 4
200 – 1000 mS/cm
20.0 mS/cm
200 – 1000 mS/cm
100 mS/cm
µ µ
S/cm 20.0 – 200.0 S/cm
µ µ
S/cm 20.0 S/cm
µ µ
S/cm 200 – 2000 S/cm
µ µ
S/cm 200 S/cm
µ
S/cm 2.00 – 20.00 mS/cm
µ
2.00 mS/cm
S/cm
20.0 mS/cm
Ω
cm
Ω
cm
Ω
cm
Ω
cm
Ω
cm
Ω
cm
100 µS/cm ... 300 µS/cm
0.0 µS/cm ... 300 µS/cm
150 µS/cm ... 300 µS/cm!
Values in brackets for
current output 0...20 mA
80 100
Current output meas. range [%]
Instrument configuration
lm152e07.chp
1)
MR 5
100 mS/cm
Current output signal
Fig. 7.3 with bilinear characteristic
bilinear.cdr
43