Hanna Instruments pH 300, Инструкция по эксплуатации, Страница: 19 / 57

37 36
For pH 300 only:
The calibration process
is complete and the dis-
play will ask for the date
entry.
Use UP or DOWN to
select the month, the
day and the year.
Use CAL to toggle be-
tween month, day and
year.
After entering the cali-
bration date, press CFM
and the meter will re-
turn to the normal oper-
ating mode.
For pH 302 only:
The calibration process is complete. The meter
will print a confirm message and return to the
normal operating mode.
For pH 301:
The second buffer value is then displayed on
the primary LCD and the secondary LCD will
display the expected third buffer
value.
• Press CAL and the calibra-
tion process is ended with
the offset and the 1
st slope of
the meter calibrated.
Note: the meter will automatically skip the
buffer that was used for the first calibra-
tion to avoid erroneous calibration.
DATE
CAL
Calibration com-
pleted
CAL
°C
°C
CAL
CFM/
• Press UP or DOWN or just DOWN (for
pH 302) until the secondary display
changes the value of the second solution
(e.g. “
4.01
”).
• Only when the read-
ing is stable (less
than ±0.03 variation
in a 10 seconds time
interval), the "
BUF
1
" in-
dicator will stop flash-
ing (after about 30
seconds) and the
"CFM" indicator will
blink.
• Press CFM to con-
firm the calibration.
If the reading is not
within 70% to 108%
of the buffer solution,
"WRONG
BUF
2
" and
"WRONG " will blink
alternately. If the
reading is close to
the selected buffer
(between 70 to
108%), the meter
stores the reading
(and adjusts the slope point).
°C
°C
2
pH
CAL
BUF
ENTER/
CFM
CFM
CFM/
WRONG
BUF
WRONG