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Setup
The actual (uncompensated) conductivity limits are in accordance with the specifications
set forth in the method “<645> Water Conductivity” of the USP 25–NF 20 (January 2002).
The actual sample water temperature is rounded downward to the nearest 5° to establish
the conductivity limit, thereby assuring any potential excursions are detected early. For
example, if the measured water temperature is 24.5 °C, the 20 °C limit is applied and an
alarm is generated if the conductivity exceeds 1.1
µS/cm U.
To ensure agreement between all data outputs, TOC, conductivity, and temperature
values are all rounded to match the analyzer’s accuracy for alarm limit checking, display,
printouts, and any digital outputs.
Return icon returns you to the setup dialog box and saves the changes. Any changes
are noted in the audit trail.
Table 12 Conductivity alarm limits
Temperature
(°C)
Uncompensated
Conductivity (µS/cm)
Temperature
(°C)
Uncompensated
Conductivity
(µS/cm)
0 0.6 55 2.1
5 0.8 60 2.2
10 0.9 65 2.4
15 1.0 70 2.5
20 1.1 75 2.7
25 1.3 80 2.7
30 1.4 85 2.7
35 1.5 90 2.7
40 1.7 95 2.9
45 1.8 100 3.1
50 1.9
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