39
38
• Adjust the OFFSET trimmer if the LCD
does not show the zero reading.
• Pour enough conductivity
solution into a beaker to
achieve at least 8 cm
(3¼") of depth.
• Immerse the probe into the
beaker with the conductivity
solution. The holes on the
sleeve must be completely
submerged in the solution.
• Tap the probe repeatedly on the bottom of
the beaker and stir it to ensure that no air
bubbles are trapped inside the sleeve.
• If the temperature of the probe is close to
that of the solution the display will stabi-
lize quickly and provide you with a tem-
perature compensated conductivity mea-
surement.
However, allow a few minutes if there is a
temperature difference of 5°C (9°F) or more
for the ATC circuitry to compensate com-
pletely.
• When the reading stabilizes, turn the
SLOPE trimmer on the front of the
HI943500 until the LCD reading is the same
8 cm
(3
¼
")
HI 7030
CALIBRATION PROCEDURE OF
HI943500 WITH HI7638
Material Needed
• HI7638 conductivity probe
• HI943500 conductivity controller
• Calibration solutions, according to the dif-
ferent models:
HI7034 80mS/cm @25°C for HI943500A
HI7030 12.88 mS/cm@25°C for HI943500B
HI7031 1413 µS/cm @25°C for HI943500C
HI7033 84 µS/cm @25°C for HI943500D
PROCEDURE:
• Ensure that the probe
is connected to the
meter securely by align-
ing the pins with the
socket, pushing the plug
in and tightening the
threaded ring.
• Insert the probe into the sleeve.
• With the conductivity probe in air,
press the MEASURE key to set the meter
to MEASURE mode.