User Guide

Note The electrode should be submerged ap-

proximately 4 cm (1

’’) in the solu-

tion. The temperature probe has to be

located as close as possible to the pH

electrode.

Note When it is not possible to immerse the Potential Matching Pin

together with the pH electrode in the solution, disable the

differential input by setting setup item I.04 to “OFF”.

• When the reading becomes stable,

the probe indicator will stop flash-

ing (after about 30 seconds), and if

the pH value is close to the selected

buffer, the “CFM” indicator will start

blinking, otherwise the “WRONG”

indicator, the pot and the BUF tags

will start blinking.

• Press the CFM key to confirm calibration. The meter will

show the scrolling message “Press CFM again to confirm

the current buffer or right to escape” (to prevent from con-

firming the calibration point inadvertently).

Pressing again CFM, the secondary LCD will display the

second expected buffer value.

• In the second case (pH value not close to the buffer) the

meter will remain in the same state until the reading be-

comes unstable or the calibration mode is quitted.

• For the second buffer value it is possible to choose be-

tween pH 4.01 and pH 10.01 (or pH 4.01 and pH 9.18 if

the NIST set has been selected). Use the  or  key to

switch between the two possibilities.

• Once selected the buffer, the procedure is the same as for

the first calibration point.

Note A time-out of 1.5 minutes is present for the pH electrode

response time. During calibration, if the pH reading is not

stable after 1.5 minutes, the device displays twice the scroll-