JUMO AQUIS touch S, Assembly Instructions Manual

Page: 23 / 150

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10 Configuration
10.6.6 CR/Ci analysis inputs (conductive/inductive conductivity)
Open: Device Menu > Configuration > Analog Inputs >
Analysis Input 1 to 4 > Configuration
Configuration point Selection/
setting option
Explanation
Description up to 15 text characters Designation for the input
Compensation tem-
perature Selection from
analog selection Analog input of the compensation thermometer
for temperature-compensated conductivity mea-
surement
Reference temp. 15 to 30 °C required only for conductivity measurement
with "TDS", "TC linear" or "TC curve" tem-
perature compensation:
The temperature at which the conductivity value
displayed was set
Filter Time Constant 0.0 to 25.0 s Optimization of measured value updating
The higher the value of the filter time const., the
slower the measured value is updated.
nominal
cell constant for CR: 0.01 to 10 cm
-1
for Ci: 4.00 to 8.00 cm
-1
nominal cell constant of the conductivity sensor
(can be read from the sensor nameplate)
If an ASTM test certificate showing precisely-
measured cell constants is available, in addition
to entering the nominal cell constants the relative
cell constants of all measuring ranges in the cal-
ibration values must be manually entered (cf.
Chapter "Manual entry of calibration values",
page 50). The relative cell constants must be cal-
culated from nominal cell constants (nameplate
for the sensor) and measured cell constants
(ASTM test certificate):
(measured cell constant × 100 %) ÷ nominal cell
constant = relative cell constant.
Calculation example:
nominal cell constant = 0.1 cm-1
measured cell constant = 0.1014 cm
-1
rel. cell constant =
(0.1014 cm
-1
× 100 %) ÷ 0.1 cm
-1
= 101.4 %
Cell type 2 electrodes
4 electrodes For conductivity sensors with 4 electrodes, pollu-
tion detection is made available.
Pollution
detection OFF
ON possible only for conductive conductivity
measurement in a 4-wire circuit:
When this function is activated, a sensor alarm is
triggered in case of soiling.
Wire break
detection OFF
ON possible only for conductive conductivity
measurement:
When this function is activated, a sensor alarm is
triggered in case of a sensor wire break.