7
3
STARTER 3100 operation
The procedure of pH measurement is the following; the key points are the pH electrode, rinse,
calibration, storage.
a)
pH electrode preparation
b)
buffer preparation and pH electrode calibration
c)
sample preparation
d)
pH measurement
e)
Measurement result record or print
f)
Rinse the pH electrode and storage
pH electrode preparation: pH electrode should be rinsed with pure water before and after using.
Check if the electrode is physically damaged. (Be careful with the glass bulb)
The pH electrode should be stored in the storage bottle; the solution in the bottle is 3M KCl
solution. After the pH electrode put into the sample or buffer solution, user should stir several
seconds then wait
30 to 60 seconds
for the signal to be stable, and then press the button to
operate (Calibration or measurement).
3.1
Calibration
3.1.1
Buffer group
STARTER 3100
can perform
1-, 2-
or
3-
point
calibrations.
There are 3 buffer groups in the meter, you can select the buffer group you prefer (see 4.3),
default buffer is
b1 US standards
; the buffer value will be automatically recognized during
calibration. The 3 predefined buffer groups are (at 25°C):
STARTER 3100 automatically corrects for the temperature dependence of the buffer pH values
given in the following table - buffer group
b1
.
b1
1.68
4.01
7.00
10.01
b2
2.00
4.01
7.00
9.21
11.00
b3
1.68
4.00
6.86
9.18
12.46
5 °C
1.67
4.01
7.09
10.25
10 °C
1.67
4.00
7.06
10.18
15 °C
1.67
4.00
7.04
10.12
20 °C
1.68
4.00
7.02
10.06
25 °C
1.68
4.01
7.00
10.01
30 °C
1.68
4.01
6.99
9.97
35 °C
1.69
4.02
6.98
9.93
40 °C
1.69
4.03
6.97
9.89
45 °C
1.70
4.05
6.97
9.86
50 °C
1.71
4.06
6.96
9.83
Содержание starter 3100
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