42
SECTION 4,
continued
3. Press the
UP ARROW
to display the standard concentration
value. Record this value. Press
EXIT
.
4. As the conductivity of the sample measurements change, the
cell constant can be updated without calibrating with a
standard. First, press
CAL
.
5. Functional keys will appear in the lower part of the display.
CAL
and
?
will appear in the upper display. The main display
will show the last value used for calibration.
6. Press the
DOWN ARROW
until the current cell constant is
displayed (in cm
–1
).
7. Use the numeric keypad to enter the cell constant from a
previous calibration that applies to the current sample. If a
number entry error occurs, start over by pressing
CE.
8. Press
ENTER
. When the calibration is complete, the meter
will return to measurement mode.
4.3.4
Reviewing Calibrations
1. From the Reading mode, press the
REVIEW
key.
2. To print a calibration report, press the
key.
3. The display will show the date of the most recent calibration.
Press the
TIME
key to see the calibration time. Press the
UP
ARROW
to continue.
4. The display will show the value of the standard used for
calibration. Go to step 5 if the calibration was performed by
setting the cell constant. Otherwise, press the
UP ARROW
once.
5. The meter will display the current cell constant in cm
–1
. To
exit Cal Review mode, press
EXIT
.