Starter 3100 Operation; Calibration; Buffer Group - OHAUS STARTER 3100 Manual De Instrucciones

STARTER 3100 Bench pH Meter
4

STARTER 3100 OPERATION

Standard procedure of pH measurement is as follows:
a) pH electrode preparation
b) buffer preparation and pH electrode calibration
c) sample preparation
d) pH measurement
e) Record measurement results or print
f) Rinse the pH electrode and properly store
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 placing the pH electrode into the sample or buffer solution, user should stir several
seconds then wait 30 to 60 seconds for the signal to stabilize, and then press the button to
operate (Calibration or measurement).
WARNING Do not operate the equipment in hazardous environments. The
equipment is not explosion protected.
WARNING When using chemicals and solvents, comply with the instructions of the
chemical producer and the general lab safety rules.
4.1

Calibration

4.1.1

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):
b1 1.68
b2 2.00
b3
1.68
STARTER 3100 automatically corrects for the temperature dependence of the buffer pH values
given in the following table - buffer group b1.
This means, if the buffer solutions' temperature is 15° C, the calibration value you will get should
be pH1.67 (buffer 1.68), pH4.00 (buffer 4.01), pH7.04(buffer 7.00) and pH10.12 (buffer 10.01).
4.01 7.00
4.01 7.00
4.00 6.86
10.01
9.21 11.00
9.18 12.46
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