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23
Configuring The Meter
4
4.4 PERFORMING TWO-POINT CALIBRATION (“CAL.2”)
Only buffer solutions of 4, 7 and 10 are acceptable. IF the buffer value is not
accepted, the meter will display a flashing “
PH.ER
“.
Two-point calibration should be performed with two combinations of two buffer
solutions (4 and 7, or 7 and 10).
1.
Place your electrode into a buffer solution.
2.
Press the
MENU
button until the meter shows “
CAL.2
”
3.
Press the
T/mV
button. The meter shows “
IN 1
” (Input 1)
4.
Press the
T/mV
button again. The meter shows the previous value of “
IN 1
”.
5.
Press the
T/mV
button again. The meter shows the actual buffer solution’s pH
value.
Please allow enough time for the electrode to settle before processing.
6.
Press the
MENU
button to store the “
IN 1
” value. The meter momentarily shows
an “
OK
” with buffer value (“
OK.4
”, “
OK.7
”, or “
OK.10
”), followed by “
IN 2
” (Input 2)
7.
Rinse the electrode with distilled water and place it into the second buffer solution.
8.
Press the
T/mV
button. The meter shows the previous value of “
IN 2
”
9.
Press the
T/mV
button again. The meter shows the actual buffer solution’s pH
value.
Please allow enough time for the electrode to settle before processing.
10.
Press the
MENU
button to store the “
IN 1
” value. The meter momentarily shows
an “
OK
” with buffer value (“
OK.4
”, “
OK.7
”, or “
OK.10
”), then momentarily shows
“
STRD
”, followed by “
S1.CF
” (Setpoint 1 Configuration).