16 Appendix
96
Zero point (1-point) calibration
With one-point offset calibration, the zero point of the pH
combination electrode is calculated, see chapter 8.4 "Calibrating the relative
cell constant", page 51.
Recommended only for special applications, such as ultra-pure water.
2-point calibration
With two-point calibration, the zero point and slope of the combination
electrode are calibrated.
This is the recommended calibration for most sensors.
Temperature compensation (conductivity or resistance)
The conductivity of a measurement solution is temperature-dependent (the
conductivity of a solution rises as the temperature increases). The dependency
of conductivity and temperature describes the temperature coefficient of the
measurement solution. As conductivity is not always measured for the
reference temperature, automatic temperature compensation is integrated in
this instrument. The transmitter uses the temperature coefficient to calculate
p
H
mV
1 2 3
4 5 6
8
9
1
0
11 12 13 1
4
0
7
B
A
p
H
mV
1 2 3
4 5 6
8
9
1
0
11 12 13 1
4
0
7
B
A
Summary of Contents for dTRANS CR 02
Page 83: ...83 12 Setup program Export data for processing in an external program...
Page 118: ...17 Index 118...
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