Hanna Instruments ph 300 ユーザーズマニュアル

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Press CAL to enter the setting mode and the
month will be flashing.

Use UP or DOWN to select the month.

Press RANGE and the day will start to flash.

Use UP or DOWN to select the day.

Press RANGE and the year on the second-
ary LCD will flash.

Use UP or DOWN to select the year.

DATE

DATE

DATE

pH300, pH301 and pH302 use an EEPROM
to retain the pH calibration, mV calibration,
temperature calibration as well as the serial
communication setting. The instrument will
store the respective data after a calibration
or serial communication setting, even when it
is not plugged-in.

pH302 uses a rechargeable battery to retain
the pH calibration data. It lasts approximately
one month when fully charged. The battery is
automatically charged any time the meter is
plugged-in (either turned on or off).

If you need to unplug the
instrument, press OFF before
disconnecting the meter from
the mains. Only in this case
will the instrument retain the
memorized data. Otherwise,
the instrument needs to be
re-calibrated. In the case of a power failure
while the instrument is operational, re-cali-
bration is required.

When the instrument is initially switched on,
the microprocessor checks if any calibration
data is in memory (i.e. if the offset is within
±1 pH and the slope between 70 - 108%).

If the calibration data are not memorized, the
offset and slope of the instrument will be set
to 0 mV and 100% respectively.

Press DATE to display the date. The month
and the day will be displayed on the primary
LCD, the year on the secondary one.

DATE