9
Note:
If the display shows only a “
1
” on
the far left hand side, the meter is out of
range. Select the next (higher) range.
• Wait for a couple of minutes for the temperature sensor to reach
thermal equilibrium with the sample before taking measurements.
• After the measurement has been completed, the instrument should
be switched off and the probe should be cleaned and dried (see
“Probe Maintenance” on page 17).
CALIBRATION
Accessories needed:
• Use any calibration solution within the meter’s range. The
solution should ideally be close to the samples being measured.
Use for example
HI7030
or
HI8030
, 12880
µ
S/cm (=12.88
mS/cm) conductivity solution, for
HI8633
and
HI8733
, and
HI7032
, 1382 mg/L (=2764
µ
S/cm) TDS solution, for
HI8734
.
• ChecktempC or another accurate thermometer with 0.1 °C
resolution (not necessary for
HI8733
).
PROCEDURE FOR HI8633 AND HI8734
• Pour sufficient quantity of a conductivity
(
HI8633
) or TDS (
HI8734
) calibration
solution (e.g.
HI7030
or
HI7032
) into a
beaker to cover the holes on the probe. If
possible, use plastic beakers to minimize
any EMC interference.
• Immerse the conductivity probe, making
sure that holes are completely submerged,
and the ChecktempC in the solution.
• 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.
