Xylem WQL-pH pH DATALOGGERS - Manual (Page 32)

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