IST87314Y 10/10
INITIAL PREPARATION
The meter is supplied complete with a 9V battery. Remove
the battery compartment cover on the back of the meter, install
the battery while observing its polarity.
Connect the desired probe (
HI 76302W
for EC or
HI 3316D
for resistivity measurements) to the DIN socket on the top of
the meter. The instrument will automatically recognize which
probe is connected.
Turn the meter ON by pressing the
ON/OFF
key.
TAKING CONDUCTIVITY MEASUREMENTS
•
•
•
•
• Immerse the
HI 76302W
probe in the solution, while
making sure that the holes of the sleeve are completely
submerged. Tap the probe lightly on the bottom of the
beaker to remove any air bubbles trapped inside.
•
•
•
•
• Adjust the conductivity TC knob to the temperature coefficient
value of the solution.
•
•
•
•
• Select the appropriate conductivity range, by pressing
EC
RANGE
key.
Note:
If the display shows “
1
”, the reading is over-range.
Select the next higher range.
•
•
•
•
• Allow a few minutes for the reading to stabilize, and the
LCD will display the temperature compensated conductivity
reading.
TAKING RESISTIVITY MEASUREMENTS
•
•
•
•
• Immerse the
HI 3316D
probe in the solution, while making
sure that the hole on the probe body is completely
submerged.
• Wait for a few seconds to allow the reading to stabilize.
The resistivity value of the solution will be displayed on the
LCD.
Note:
If the display shows “
1
”, the reading is over-range.
• The reading is automatically corrected for temperature
variations by using the linear compensation method:
R
25
=R
t
(1+
β
(t-25))
where R
t
is the resistivity at the temperature t, and the
reference temperature is 25ºC.
• The temperature coefficient
β
is selectable through a front
knob, from 2 to 7%/°C.
HI 76302W
4-ring conductivity probe with built-in temperature
sensor, DIN connector and 1 m (3.3’) cable
HI 3316D
Resistivity probe with built-in temperature sensor,
DIN connector and 1 m (3.3’) cable
HI 7030M
12880
µ
S/cm, 230 mL bottle
HI 7031M
1413
µ
S/cm, 230 mL bottle
HI 7033M
84
µ
S/cm, 230 mL bottle
HI 7034M
80000
µ
S/cm, 230 mL bottle
HI 7035M
111800
µ
S/cm, 230 mL bottle
HI 7039M
5000
µ
S/cm, 230 mL bottle
HI 7061M
General cleaning solution, 230 mL bottle
HI 710007
Shockproof rubber boot, blue
HI 710008
Shockproof rubber boot, orange
HI 731326
Calibration screwdriver (20 pcs)
HI 76405
Electrode holder
CONDUCTIVITY CALIBRATION
• It is recommended to calibrate the instrument for the
conductivity range at least once a week, or when the probe
is changed.
• For better accuracy, choose a solution with a conductivity
value close to the sample to be measured.
If you are measuring in the mS ranges, calibrate the
meter using the
HI 7030
(12.88 mS/cm) or
HI 7034
(80 mS/cm) conductivity solution.
For the
µ
S ranges, use
HI 7031
(1413
µ
S/cm) for the
0 to 1999
µ
S/cm range, or
HI 7033
(84
µ
S/cm) for the
0 to 199.9
µ
S/cm range.
• Rinse the probe thoroughly with distilled water and, if
possible, use plastic beakers to minimize any EMC
interferences.
• Pour a small quantity of the desired conductivity solution
into a plastic beaker, and immerse the probe while
making sure that the holes of the sleeve are completely
submerged. Tap the probe lightly on the bottom of the
beaker to remove any air bubbles trapped inside the sleeve.
• Adjust the conductivity TC knob to 2%/°C.
• Select the appropriate measurement range: 199.9
µ
S if
calibrating with
HI 7033
solution, 1999
µ
S for
HI 7031
,
19.99 mS for
HI 7030
, or 199.9 mS for
HI 7034
.
Note:
If the display shows “
1
”, the reading is over-range.
Select the next higher range.
• Allow a few minutes for the reading to stabilize and adjust
the conductivity calibration trimmer located in the battery
compartment, to read the calibration solution value @25°C
(77°F).
• All subsequent measurements will be referenced to 25°C.
• If you need to reference the measurements to 20°C, adjust
the calibration knob to read the calibration solution value
@20°C (68°F). See conductivity vs. temperature chart on
the calibration solution sachet or bottle label.
• Calibration is now complete and the instrument is ready
for use.
RESISTIVITY CALIBRATION
• The meter is factory calibrated for resistivity range, and
usually needs recalibration only after a resistivity probe
replacement. In this case, follow the instructions below.
• Immerse the probe in a solution of known resistivity value,
and wait for the reading to stabilize.
• Adjust the resistivity calibration trimmer located in the
battery compartment, until the resistivity value of the
reference solution is displayed.
OPERATIONAL GUIDE
CALIBRATION
BATTERY REPLACEMENT
ACCESSORIES
Recommendations for Users
Before using these products, make sure that they are entirely suitable for the environment in
which they are used. Operation of these instruments in residential area could cause unaccept-
able interferences to radio and TV equipments, requiring the operator to take all necessary
steps to correct interferences. Any variation introduced by the user to the supplied equipment
may degrade the instruments' EMC performance. To avoid damages or burns, do not
perform any measurement in microwave ovens.
When the battery becomes weak,
the meter displays a blinking
additional decimal point on the
left side of the LCD.
When the low battery indicator appears only a few hours of
battery life is remaining. A low battery level may also result in
unreliable measurements. It is recommended to replace the
battery immediately.
Unscrew the 3 screws on the back of the meter, remove the
battery cover and replace the battery while observing its polarity.
Replacement must only take place in a safe area using an
alkaline 9V battery.