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Instruction Manual
&
(HI 983302) (HI 983301)
On-line, Waterproof
EC- TDS meter with Alarm
http://www.hannainst.com
These Instruments are in
Compliance with the CE Directives
Hanna Instruments reserves the right to modify the design, construction
and appearance of its products without advance notice.
WARRANTYWARRANTY
WARRANTYWARRANTY
WARRANTY
EC and TDS are warranted for two years against
defects in workmanship and materials when used for their intended
purpose and maintained according to instructions. The probes are
warranted for a period of one year. This warranty is limited to
repair or replacement free of charge.
Damages due to accident, misuse, tampering or lack of prescribed
maintenance are not covered.
If service is required, contact the dealer from whom you purchased the
instrument. If under warranty, report the model number, date of purchase, serial number and the nature of the failure. If the repair is not
covered by the warranty, you will be notified of the charges incurred. If
the instrument is to be returned to Hanna Instruments, first obtain a
Returned Goods Authorization Number from the Customer Service department and then send it with shipment costs prepaid. When shipping
any instrument, make sure it is properly packaged for complete protection.
To validate your warranty, fill out and return the enclosed warranty card
within 14 days from the date of purchase.
All rights are reserved. Reproduction in whole or in part is prohibited
without the written consent of the copyright owner, Hanna Instruments Inc., Woonsocket, Rhode Island, 02895 , USA.
Dear Customer,
Thank you for choosing a Hanna product. This manual will
provide you with the necessary information for a correct
operation. Please read it carefully before using the meter. If
you need additional technical information, do not hesitate
to e-mail us at tech@hannainst.com.
These instruments are in compliance with the
directives
EN 50081-1 and EN 50082-1.
Remove the instrument from the packing material and
examine it carefully. If any damage has occurred during
shipment, immediately notify your Dealer or the nearest
Hanna Customer Service Center.
The meters are supplied with:
• HI 7632 EC probe (for HI 983302);
• HI 7634 TDS probe (for HI 983301);
• Calibration screwdriver;
• 12 VDC power adapter.
Note: Conserve all packing material until the instrument
has been observed to function correctly. Any defective
item must be returned in its original packing.
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
EC and TDS are instruments specially designed to meet the needs of growers in greenhouses and
hydroponic applications.
The housing has been completely sealed against vapors and
humidity with IP54 rating.
You can simply hang the meter right above the sample to be
tested for continuous measurement.
Both meters come with a probe that compensates for the
temperature variation automatically. The probe is easy to
clean and requires little maintenance.
You can even select your own setpoint and be alerted of an
abnormal situation with a flashing LED alarm.
Measurements are highly accurate and the meters can be
calibrated at one point. In addition, the TDS
uses a specially devised formula which perfectly reflects the
needs of growers. In fact, the common method of measuring
Total Dissolved Solids by multiplying the conductivity by 0.5
is far off the mark in horticulture with high concentrations of
phosphate, nitrogen, etc.
You no longer need to worry about battery changes either:
the unit runs without interruption on 12 VDC power supply.
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTION
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTION
1. Molded eye
2. Alarm LED
3. EC or TDS probe
4. 12 VDC power adapter
5. Power supply connector
6. Calibration trimmer
7. Liquid Crystal Display
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONS
EC – HI 983302
Range 0.00 to 9.99 mS/cm (EC)
Resolution 0.01 mS/cm (EC)
Accuracy (@ 25°C/77°F) ±2% f.s.
Typical EMC Deviation ±2% f.s.
Temperature Compensation Automatic
5 to 50°C (41 to 122°F)
Setpoint 0.70 to 3.50 mS/cm (EC)
Hysteresis ±0.20 mS/cm (EC) around setpoint
Alarm LED blinks when EC value is outside
hysteresis range
Calibration Manual with one trimmer
Probe HI 7632 EC probe (included)
Casing IP54
Power supply External 12 VDC (included)
Dimensions 86 x 94 x 33 mm (3.4 x 3.7 x 1.3”)
Weight 150 g (5.3 oz.)
TDS – HI 983301
Range 0 to 1990 mg/L (ppm)
Resolution 10 mg/L (ppm)
Accuracy (@ 25°C/77°F) ±2% f.s.
Typical EMC Deviation ±2% f.s.
TDS Factor 0.7
Temperature Compensation Automatic
5 to 50°C (41 to 122°F)
Setpoint 500 to 1600 mg/L (ppm)
Hysteresis ±100 ppm around setpoint
Alarm LED blinks when TDS value is outside
hysteresis range
Calibration Manual with one trimmer
Probe HI 7634 TDS probe (included)
Casing IP54
Power supply External 12 VDC (included)
Dimensions 86 x 94 x 33 mm (3.4 x 3.7 x 1.3”)
Weight 150 g (5.3 oz.)
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OPERATIONAL GUIDEOPERATIONAL GUIDE
OPERATIONAL GUIDEOPERATIONAL 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 variation may be due to temperature
compensation and the fact that
the probe is adjusting itself to
the new sample. Allow the reading to stabilize and the meter
will start continuous monitoring.
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 reading 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 instrument is recommended.
• Turn the meter on and make sure that
the MEASURE/SET switch is on the MEASURE mode.
• Pour a small quantity of
1413 µS/cm calibration solution or 1500 ppm TDS
calibration solution in a beaker. If possible, use plastic
beakers to minimize any
EMC interference.
CALIBRATIONCALIBRATION
CALIBRATIONCALIBRATION
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, in 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.
ACCESSORIESACCESSORIES
ACCESSORIESACCESSORIES
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 DECLARATIONCE DECLARATION
CE DECLARATIONCE DECLARATION
CE DECLARATION
OF CONFORMITYOF CONFORMITY
OF CONFORMITYOF CONFORMITY
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 unacceptable interferences 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 09/98PRINTED IN PORTUGAL
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