Measurement Accuracy To Within Approx; High Measurement Accuracy - ProMinent DULCOTEST ICT 2 Mode D'emploi

Commissioning
install. factor
setting ?
40
Cover the sensor tip completely with the water sample (immerse
or flood the environment)
There are now three alternative procedures for different require-
ments:
8.3.1

Measurement accuracy to within approx. 10 %

Set the temperature coefficient α of the water sample in the
"meas. parameter setting?" setting menu (related to 25 °C. Arrow
keys.) or determine using the "calibration α" setting menu (see
Operating instructions DULCOMETER
tivity)
install. factor
0,5
100 μS/cm
Enter the sensor installation factor in the "install. factor" setting
menu (arrow keys). The installation factor is "1" if the distance
from the wall a of the sensor tip is greater than 30 mm (see also
Fig. 3).
8.3.2

High measurement accuracy

a) Calibration with reference metering equipment
Calibration of the sensor is normally carried out once it has been
installed with a reference metering device (e.g. a hand-held meter
for conductive conductivity).
Measurement accuracy of reference meter
The reference metering equipment must have a corresponding
measurement accuracy (see operating instructions of the refer-
ence metering equipment with respect to the measurement range
and measurement accuracy for conductivity and temperature). In
order to exploit the measurement accuracy of the sensor it must
be calibrated to an accuracy of at least 1 %.
The reference metering equipment itself must be calibrated using
calibration solutions with a measurement accuracy better than
±1 % (see operating instructions of the reference metering equip-
ment).
ProMinent recommends a reference metering device with a four-
electrode sensor and a temperature measurement accuracy better
than ±0.5 °C at 25 °C (e.g. Portamess 911 Cond (order no.
1008713) with sensor type LF 204 (order no. 1008723)) for all
measurements in conductivity range above 1 mS/cm.
®
D1C, Inductive Conduc-
ProMinent ®