Xylem Multi 3620 IDS, Руководство по эксплуатации

Страница: 58 / 114

Conductivity Multi 3620 IDS
58
ba77169d06 10/2021
within the monitored time interval.
The minimum duration until a measured value is assessed as stable is the mon-
itored time interval. The actual duration is mostly longer.
8.1.2 Measuring the temperature
For reproducible conductivity measurements, it is essential to measure the
temperature of the test sample.
IDS sensors measure the temperature with a temperature sensor integrated in
the IDS sensor.
8.2 Temperature compensation
The calculation of the temperature compensation is based on the preset refer-
ence temperature, 20 °C or 25 °C. It appears on the display as
Tr20
or
Tr25
.
You can select one of the following temperature compensation methods:
 Nonlinear temperature compensation (
nLF
) according to EN 27 888
 Linear temperature compensation (
Lin
) with adjustable coefficient in the
range 0.000 ... 10.000 %
/
K
 No temperature compensation (off)
Application tips Select the following temperature compensations given in the table according to
the respective test sample:
Measured
parameter Time interval Stability in the time interval
Conductivity
ϰ
10 seconds
Δ
: better than
1.0% of measured value
Temperature 15 seconds
Δ
: better than 0.5 °C
The reference temperature and temperature compensation are
set in the menu for the parameter, conductivity (see section
11.4.1).
Test sample Temperature compensation Display indica-
tor
Natural water
(ground water,
surface water,
drinking water)
nLF
according to EN 27 888
nLF
Ultrapure
water
nLF
according to EN 27 888
nLF