User Guide

13
13
COND.
TEMP.
• Press COND/TEMP again to display conductivity
measurement.
• Select 19.99 mS/cm range by pressing the
appropriate range key.
• Adjust the calibration trimmer (see page 5, #6) on the side of
the instrument with the calibration screwdriver until the display
shows the conductivity reading at 25°C (see the conductivity vs.
temperature on page 18). E.g. @ 25°C, 12880 µS/cm =
12.88 mS/cm.
• All subsequent measurements will be compensated to 25°C (77°F).
If you prefer to standardize the temperature compensation to
20°C (68°F) rather than 25°C (77°F), leave the TEMPERATURE
knob at 18°C (if the temperature of the solution is 18°C), adjust
the trimmer to read "11.67 mS" (see the conductivity vs. tem-
perature chart on page 18). All subsequent measurements will be
compensated to 20°C.
• The calibration is now complete and the instrument is ready for
use.
The instrument should be re-calibrated at least once a month, or
when the probe or battery is changed.
Note: For more accurate results, it is advisable to use a calibration
solution close to the measurement range . See the accessories
section on page 23 for a wide selection of conductivity solu-
tions.
19.99
mS
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S
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9
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19.99
mS
1999
µS
199.9
µS
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COND.
TEMP.
H
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Untitled-19
14
14
PROCEDURE FOR HI 8733
• Pour sufficient quantity of a conductivity
calibration solution (e.g. HI 7030/
HI 8030) into a beaker to cover the holes
on the probe. If possible, use plastic bea-
kers to minimize any EMC interference.
• Immerse the conductivity probe in the
solution, making sure that holes are com-
pletely submerged.
• Wait for a couple of minutes for thermal
equilibrium to be reached.
• Tap the probe on the bottom, then shake it while rotating to
make sure no air bubbles remain trapped in the sleeve.
• Switch the instrument on by pressing
ON/OFF.
• Set the temperature coefficient knob to
2% to compensate for the temperature
effect of average solutions (to determine
exact value for a particular solution, see
page 20).
• Select 19.99 mS/cm range by pressing
the appropriate range key.
• Adjust the calibration trimmer (see page 6, #5) on the side of
the instrument with the calibration screwdriver until the display
shows "12.88 mS" i.e. the conductivity reading @ 25°C.
• All subsequent measurements will be compensated to 25°C (77°F).
If you prefer to standardize the temperature compensation to
20°C (68°F) rather than 25°C (77°F), adjust the trimmer to read
"11.67 mS" (see the conductivity vs. temperature chart on page
18). All subsequent measurements will be compensated to 20°C.
• The calibration is now complete and the instrument is ready for
use.
H
I 7
0
3
0
ON
OFF
2.5
2
1.51
0.5
0
TEMPERATURE COEFFICIENT
19.99
mS
m
S
mS