1 buffer sets, Buffer sets – Xylem WQL-pH pH DATALOGGERS User Manual
Page 32
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Calibrating for pH measurements
WQL-pH
106
ba75821e01
10/2009
5.1
Buffer sets
You can use the buffer sets quoted in the table for an automatic calibration.
The pH values are valid for the specified temperature values. The
temperature dependence of the pH values is taken into account during the
calibration.
The TEC calibration for pH 10.01 is optimized for the WTW technical buffer
solution TEP 10 Trace or TPL 10 Trace. Other buffer solutions can lead to an
erroneous calibration. The correct buffer solutions are given in the WTW
catalog or on the Internet.
Buffer set
Menu
designation
pH
values
at temp.
WTW technical buffer
solutions
TEC
2.00
4.01
7.00
10.01
*
25 °C
Standard buffer solutions
according to DIN 19266
NIST/DIN
1.679
4.006
6.865
9.180
12.454
25 °C
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