One-Point Calibration - Hach sensION3 Instruction Manual

SECTION 3,
continued

3.2.3 One-Point Calibration

8. When the reading has stabilized, the standard number will
change to If measuring in the mV mode, press
2.
to continue.
9. Rinse the electrode and place it in the next buffer.
10. Enter the pH value of the buffer using the number keys as
described above. Press
11. Repeat steps 8–10 for the third buffer or press
two buffers. In either case, the slope value and the
icons will appear. Verify the slope value is within the ranges
specified in the electrode manual.
12. To save the calibration and return to the reading mode, press
. To exit the calibration without saving it and return to
ENTER
the reading mode, press
The one-point calibration is used to adjust the slope offset and
cannot be done unless a prior two or three point calibration has
been done.
1. Press . ,
Cal
CAL
2. Place the electrode in an auto-recognizable pH buffer. or any
other buffer and manually enter the pH value.
3. Press
READ/ENTER
continuously updated until a stable reading is reached.
4. When the reading has stabilized, the standard number will
change to .
2
5. Press The adjusted offset value, the slope, and the
EXIT.
and icons will appear. Verify the offset value (isopotential
?
point) is within the range specified in the electrode manual.
6. To save the adjusted calibration and return to the reading
mode, press
ENTER
and return to the reading mode, press
30
.
ENTER
.
EXIT
, , and will be displayed.
1 ? Standard
. The temperature and pH values will be
. To exit the calibration without saving it
ENTER
if using
EXIT
and
Store
Store
.
EXIT
?