Transmitter 9125 – Conductivity / resistivity measurement
Page 46
Example: if the measured temperature is equal to
22°C, the threshold is of 1.1 PS/cm and shall remain at
this value as long as the temperature stays at 22°C. If
the temperature varies, rising to 25°C, the threshold
automatically switches to 1.3 PS/cm.
NB: The delivered alarm corresponds to the value of
the threshold associated with the USP temperature
immediately below the measured temperature (i.e.
20°C and 25°C in the previous example).
T°C
Non-
compensated
conductivity
PS/cm
T°C
Non-
compensated
conductivity
PS/cm
T°C
Non-
compensated
conductivity
PS/cm
0
2.4
35
5.95
70
9.1
5
3.0
40
6.5
75
9.7
10
3.6
45
6.8
80
9.7
15
3.95
50
7.1
85
9.7
20
4.3
55
7.6
90
9.7
25
5.1
60
8.1
95
9.95
30
5.4
65
8.6
100
10.2
Table 2 - Temperature curve and conductivity requirements
for purified water (non temperature-compensated conductivity
measurements).
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