OPERATIONAL GUIDE
OPERATIONAL GUIDE
OPERATIONAL GUIDE
OPERATIONAL GUIDE
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 varia-
tion may be due to temperature
compensation and the fact that
the probe is adjusting itself to
the new sample. Allow the read-
ing to stabilize and the meter
will start continuous monitor-
ing.
ADJUSTING THE SETPOINT
With the
EC
and
TDS
, you can select your own
setpoint and be alerted with a visual LED alarm when an
abnormal situation arises.
• Unscrew and remove the rear panel and gasket seal to
access the MEASURE/SET switch.
• Move the switch to the left (SET Mode).
• With a small screwdriver adjust the setpoint trimmer to
display the desired value in the 0.70 to 3.50 mS/cm or
in the 500 to 1600 ppm range for the
EC
and
TDS
,
respectively.
• Make sure the switch is moved back to
the right (MEASURE Mode).
• Replace the rear panel and
the gasket, ensuring the unit
is properly closed.
• Whenever the EC or TDS read-
ing varies by more than
±0.20 mS/cm or ±100 ppm
from the setpoint, respectively,
the red alarm LED will blink.
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 electrode 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 when not in use, rinse the probe with
tap water.
For the greatest accuracy, frequent calibration of the instru-
ment is recommended.
• Turn the meter on and make sure that
the MEASURE/SET switch is on the MEA-
SURE mode.
• Pour a small quantity of
1413 µS/cm calibration so-
lution or 1500 ppm TDS
calibration solution in a bea-
ker. If possible, use plastic
beakers to minimize any
EMC interference.
CALIBRATION
CALIBRATION
CALIBRATION
CALIBRATION
CALIBRATION
• Immerse the EC or TDS probe in the
solution, making sure that metal pins
are completely submerged.
Note:
the probe should be submerged ap-
proximately 4 cm (1½”) in the
solution. Moreover,
i
n order not to
affect the accuracy of measurements,
it is important that probe body 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
until the display shows
"1.41 mS" (HI 983302) or
“1500 ppm” (HI 983301).
• The calibration is now complete and the instrument is
ready for use.
The instrument should be recalibrated at least once a
month and after performing probe cleaning procedure.
ACCESSORIES
ACCESSORIES
ACCESSORIES
ACCESSORIES
ACCESSORIES
HI 7632 *
EC probe with Automatic Temperature Compen-
sation and 2 m (6.6’) cable
HI 7634 *
TDS probe with Automatic Temperature Com-
pensation and 2 m (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 7052L
1500 ppm (TDS) calibration sol., 460 mL bottle
HI 7031L
1413 µS/cm(EC) calibration sol., 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
CE DECLARATION
CE DECLARATION
CE DECLARATION
CE DECLARATION
OF CONFORMITY
OF CONFORMITY
OF CONFORMITY
OF CONFORMITY
OF CONFORMITY
Recommendations for Users
Before using these products, make sure that they are entirely suitable for the environ-
ment in which they are used.
Operation of these instruments in residential areas could cause unacceptable interfer-
ences to radio and TV equipment.
The metal band at the end of the probe is sensitive to electrostatic discharges. Avoid touching
this metal band at all times.
During operation, ESD wrist straps should be worn to avoid possible damage to the probe by
electrostatic discharges.
Any variation introduced by the user to the supplied equipment may degrade 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 microwave ovens.
ISTRECGRR1 09/98
PRINTED IN PORTUGAL