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PH BUFFER SELECTION (HI21523 ONLY)
A one point pH calibration at a value different from standard
buffer is possible by directly entering the desired calibra-
tion value.
• Pour a small quantity of the
calibration solution in a beaker
and then press CAL to enter the
calibration mode.
• After the correct password is en-
tered, the control action stops and
the primary LCD will display the
pH value using the current offset
and slope, with the “CAL” and
“
“ indicators lit and the probe
indicator “ “ blinking.
• Press SETUP and the pH value
on the secondary LCD will start
blinking.
• By the
,
and
keys select the pH calibration value
of the buffer.
• Immerse the electrodes in the buffer solution.
• When the reading is stable press CFM to confirm the
calibration.
Note
During calibration with pH buffer solutions different from
standard, the stability check function is not active. No “CAL”
or “
“ indicators will blink, hence wait for the reading to
stabilize after having immersed the electrode in the calibra-
tion solution.
If the wrong password is entered the system reverts back
and restarts displaying the pH value.
Note
Calibration can be aborted by pressing SETUP before CFM .
Calibration is restarted with no changes to calibration data.
