OPERATIONAL GUIDE
TAKING MEASUREMENTS
• Turn the meter on by connecting the 12 VDC power
adapter to the meter and to the mains.
• Immerse the tip (4 cm - 1½”) of
the EC or TDS probe in the sample.
Note:
in order not to affect the
accuracy of measurements, it
is important that the probe
body does not touch nor stand
close to the side walls of the
vessel. The tip may lay on the
bottom of the beaker.
• The LCD will show the EC or TDS
value. Any initial variation of read-
ing may be due to temperature
compensation and to the fact that
the probe is adjusting itself to
the new sample. Allow the read-
ing to stabilize and the meter
will start continuous monitoring.
PROBE MAINTENANCE
To minimize clogging and provide longer life for the probe,
it is recommended to clean it often or at least once a month.
• Immerse the tip of the probe in
HI 7061
cleaning
solution for one hour or clean it with detergents used to
wash irrigation pipelines and fertilizer vessels.
• If a more thorough cleaning is required, brush the
metal pins with very fine sandpaper.
• After cleaning or before storing the probe, rinse it with
tap water.
For the greatest accuracy, frequent calibration of the instru-
ment is recommended.
• Pour a small quantity of the
indicated calibration solution
in a beaker: 1413 µS/cm for
HI 983302N
, 1500 ppm for
HI 983301N
or 1382 ppm for
HI 983301N/5
.
If possible, use plastic beakers
to minimize any EMC
interference.
• Immerse the EC or TDS probe in the solu-
tion, making sure that metal pins are
completely submerged.
Note:
the probe should be submerged ap-
proximately 4 cm (1½”) in the solution
and it does not touch nor stand close to
the side walls of the beaker. The tip can
lay on the bottom of the beaker.
• Wait for a couple of minutes for thermal equilibrium to
be reached.
• Tap the probe gently on the bottom, then shake it
while rotating to make sure no air bubbles have
remained trapped.
• Adjust the calibration trimmer
with the supplied screwdriver un-
til the display shows 1.41 (mS)
for
HI 983302N
, 1500 (ppm)
for
HI 983301N
or 1380 (ppm)
for
HI 983301N/5
.
• The calibration is now complete and the instrument is
ready for use.
The meters should be recalibrated at least once a month
and after performing probe cleaning procedure.
CALIBRATION
ACCESSORIES
HI 7632 *
EC probe with Automatic Temperature Compen-
sation and 2m (6.6’’) cable
HI 7634 *
TDS probe with Automatic Temperature Com-
pensation and 2m (6.6’’) cable
HI 70031P
1413 µS/cm (EC) calibration solution, 20 mL
sachet (25 pcs)
HI 70442P
1500 ppm (TDS) calibration solution, 20 mL
sachet (25 pcs)
HI 70032P
1382 ppm (TDS) calibration solution, 20 mL
sachet (25 pcs)
HI 7031L
1413 µS/cm (EC) calibration solution, 460 mL
bottle
HI 70442L
1500 ppm (TDS) calibration solution, 460 mL
bottle
HI 7032L
1382 ppm (TDS) calibration solution, 460 mL
bottle
HI 7061L
Electrode cleaning solution, 460 mL bottle
HI 710005
12 VDC power adapter, US plug
HI 710006
12 VDC power adapter, European plug
HI 710012
12 VDC power adapter, Australian plug
HI 710013
12 VDC power adapter, Southern Africa plug
HI 710014
12 VDC power adapter, UK plug
* To be replaced only by authorized service technicians
CE DECLARATION
OF CONFORMITY
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 areas could cause unac-
ceptable interferences to radio and TV equipment.
The metal band at the end of the probe is sensitive to electrostatic dis-
charges. Avoid touching this metal band at all times.
During operation, ESD wrist straps should be worn to avoid possible dam-
age to the probe by electrostatic discharges.
Any variation introduced by the user to the supplied equipment may de-
grade the instrument’s EMC performance.
To avoid electrical shock, do not use these instruments when voltages at
the measurement surface exceed 24 VAC or 60 VDC.
Use plastic beakers to minimize any EMC interferences.
To avoid damages or burns, do not perform any measurement in micro-
wave ovens.
ISECTDSGRR1
09/00
