Measurement - Hach LANGE si627 P Manuel D'utilisateur

4. Operation
4.8. Recognized Buffers
Table of values according to temperature.
Values stored in the si627 P
°C
0 2.01
10 2.01
20 2.00
25 2.00
30 2.00
40 2.00
50 2.00
60 2.00
70 2.01
80 2.01
90 2.01

4.9. Measurement

pH and temperature measurement
The pH value and the temperature in °C appear simultaneously on the display. The instrument is usually
measuring pH (see page 13).
The temperature is measured when an A.T.C. Pt 1000 is connected. Otherwise, it is necessary to inform
the instrument about the temperature of the measured solution using the keys
ORP (redox) measurement. mV range
To measure redox potential the instrument must be programmed to measure mV (see page 14).
The temperature is measured when an A.T.C. Pt 1000 is connected.
The redox potential (mV) of the solutions is affected by temperature. Nevertheless the instrument does not
carry out any compensation. Hence it is impossible to introduce the process temperature manually.
...without A.T.C. Pt 1000
M E A S U R E
pH 7.34
Temperature
selected
manually
M E A S U R E
pH 7.34
si627 P_HACH_LANGE_Ed.0510.indd ANG:17 si627 P_HACH_LANGE_Ed.0510.indd ANG:17
pH
4.01 7.12 9.52
4.00 7.06 9.38
4.00 7.02 9.26
4.01 7.00 9.21
4.01 6.99 9.16
4.03 6.97 9.06
4.06 6.97 8.99
4.10 6.98 8.93
4.16 7.00 8.88
4.22 7.04 8.83
4.30 7.09 8.79
pH measurement...
...with A.T.C. Pt 1000
M E A S U R E
pH 7.34 25.2 °C
25 °C
Temperature
measured
automatically
M E A S U R E
17 °C pH 7.34 25.1 °C
11.45
11.20
11.00
10.90
10.81
10.64
10.48
10.23
10.19
10.06
9.93
mV measurement...
...without A.T.C. Pt 1000
M E A S U R E
375 mV
Temperature
not indicated
CODE 000
.
...with A.T.C. Pt 1000
M E A S U R E
375 mV 21.3 °C
Temperature
totally
independent
M E A S U R E
375 mV 21.4 °C
17
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