11
• Press the
CFM
key to confirm the calibration: the meter stores the
first calibration point; the primary LCD will show the calibrated
reading, while the secondary LCD will show the second buffer to
be used for calibration (“
pH 4.01
”).
If you’re going to calibrate with a different buffer, select the desired
value by pressing the arrow keys.
Note:
The meter automatically skips the buffer used for the first calibra‑
tion point. A difference of at least 1.5 pH unit is required between
the two buffers: once calibrated at either pH 7.01 or 6.86, the
instrument automatically ignores the other value for the second
point (same for pH 10.01 and 9.18).
• Immerse electrode bulb approximately 3 cm (1
1
/
4
”) into the second
buffer solution, place the temperature probe as close as possible to
the electrode and stir gently.
• The LCD will flash “
WAIT NOT READY
”
for several seconds, then:
if the reading is not close to the selected
buffer, “
WRONG
“ and “
WRONG
” will blink alternatively;
if it is close to the selected buffer the meter
will advise the user with an audible signal
(if enabled) when the reading becomes
stable and the display will change to
“
READY
” and blinking “
CFM
”.
• Press the
CFM
key: the value is stored in memory and the meter
returns to measurement mode. The tags corresponding to the buffers
used for calibration and the “condition” bargraph (if enabled) will
be light up.
