EN-12
STARTER 2200 Bench pH Meter
Place the electrode in the next calibration buffer stir and wait, then press button-
,
“
Cal 2
” displays on the top left of the screen and is blinking. appears and is blinking during
calibration.
When reading is stable (normally the reading does not change in 5s), press button-
to lock the reading and finish 2-point calibration, disappears. The buffer pH value (e.g.
4.01 pH
) with the temperature display on the screen.
The 2-point calibration is finished, now we have 2 options:
Press button-
to store the 2-point calibration, the
offset
and
slope
are
shown on the display for 3 seconds then returns to the measurement screen.
Press button-
to reject the calibration and return to the measurement screen.
Note:
The use of a temperature electrode (e.g. STTEMP30) or a pH electrode with a built-in
temperature sensor (3-in-1 pH electrode) is recommended. If you use the
MTC
mode, you should
enter the correct temperature value and keep all buffer and sample solutions at the set
temperature. (See 3.1)
4.2
Sample measurement
Standard procedure of pH measurement is as follows:
a)
Connect pH (and Temperature if necessary) electrode to the meter and rinse
b)
Prepare buffer
c)
Calibrate pH electrode
d)
Prepare sample & measure
e)
Record measurement results
f)
Rinse and properly store pH and other electrodes
pH electrode preparation: pH electrode should be rinsed with pure water before and after using.
CAUTION
Check if the electrode is physically damaged. (Be careful with the glass bulb)
The pH electrode should be stored in the storage bottle.
After the pH electrode is put into the sample or buffer solution, the user should stir several
seconds then wait
30 to 60 seconds
for the signal to stabilize, and then press the proper button
to operate (calibration or measurement).
