18
PROCEDURE FOR HI 9039
•
Fill a beaker with 8 cm (3¼") of HI 7039
or HI 8039 conductivity calibration solu-
tion at 5000 µS/cm @25°C (if possible
fill two beakers and use one as rinse and
the other for calibration).
•
Make sure that the probe is connected to
the meter securely by aligning the pins
with the socket, pushing the plug in and
tightening the threaded ring.
•
Immerse the probe into the beaker. The
level of solution must be higher than the
holes on the PVC sleeve.
•
Turn the instrument on by pressing ON/OFF and select the
conductivity measurement mode by pressing RANGE.
•
Tap the probe repeatedly on the bottom of the beaker and stir it
to ensure that no air bubbles are trapped inside the sleeve.
•
Press CAL to display "5000 µS" together with the "CAL" symbol
and an intermittent "BUF" indicator.
•
If the reading is within 15% of the theoretical value, the meter
automatically recognizes the standard solution and the "BUF"
symbol will stop flashing.
•
"
" will disappear from the display
when the reading is stable and the
"CON" symbol will start blinking.
•
Press CFM to confirm the calibration reading.
Calibration is now complete and the instrument is
ready for use. All subsequent measurements will
now be compensated to 25°C (77°F). If the
instrument cannot be calibrated refer to the
Probe Maintenance section (page 30).
Press CAL to quit the calibration mode.
RANGE
ON/OFF
CAL
BUF
µ
S
°C
CAL
CON
°C
µ
S
CFM
CAL
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