Hanna Instruments EC GroChek User manual

Instruction Manual
&
HI 983302N HI 983301N
HI 983301N/5
On-line, Waterproof
EC-TDS meter with large LCD
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.
WARRANTY
EC and TDS are warranted for one year 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 six months. 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 pur-
chase, 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 de-
partment and then send it with shipment costs prepaid. When shipping
any instrument, make sure it is properly packaged for complete protec-
tion.
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 Instru-
ments 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 [email protected].
These instruments are in compliance with the directives.
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 (HI 983302N );
• HI 7634 TDS probe (HI 983301N and HI 983301N/5);
• 1413 µS/cm calibration solution (20 mL) for HI 983302N;
• 1500 ppm calibration solution (20 mL) for HI 983301N;
• 1382 ppm calibration solution (20 mL) for HI 983301N/5;
• 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 EXAMINATION
EC and TDS are instruments specially de-
signed to meet the needs of growers in greenhouses hydroponic
applications. They are equipped with a large Liquid Crystal
Display for an easy reading also from distance.
You can simply hang the meter right above the sample to
be tested for continuous measurement and the unit will run
without interruption on 12 VDC power supply.
The housing has been completely sealed against vapors and
humidity.
The meters are supplied with a probe that automatically
compensates for the temperature variation. The probe is
easy to clean and requires little maintenance.
Measurements are highly accurate and the meters can be
calibrated at one point.
In addition, the two TDS use 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 a converting value
is far off the mark in horticulture with high concentrations of
phosphate, nitrogen, etc.
In the HI 983301N model the TDS factor is 0.7 while in the
HI 983301N/5 is 0.5.
GENERAL DESCRIPTION
FUNCTIONAL DESCRIPTION
1. Molded eye
2. Calibration trimmer
3. EC or TDS probe
4. 12 VDC power adapter
5. Power supply connector
6. Liquid Crystal Display (LCD)
SPECIFICATIONS
EC – HI 983302N
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.
Temp.Compensation Automatic
5 to 50°C (41 to 122°F)
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 983301N and HI 983301N/5
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 HI 983301N 0.7
HI 983301N/5 0.5
Temp.Compensation Automatic
5 to 50°C (41 to 122°F)
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)

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