Hanna Instruments HI 9812 User manual

Instruction Manual
HI 9812 - HI 9813
Portable
pH/EC/TDS Meters
http://www.hannainst.com TheseInstrumentsarein
Compliancewith theCE Directives

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ISO 9000 Certified
Company since 1992
DearCustomer,
Thank you for choosing a Hanna product.
Please read this instruction manual carefully before using the meter.
This manual will provide you with the necessary information for a
correctuseofthe instrument,aswellasapreciseideaofits versatility.
Ifyouneedadditional technical information, do not hesitate to e-mail
usat[email protected].
These instruments are in compliance with directives
EN 50081-1 and EN 50082-1.
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTS
PRELIMINARY EXAMINATION........................................................3
GENERAL DESCRIPTION ................................................................3
FUNCTIONAL DESCRIPTION HI9812............................................4
SPECIFICATIONS HI9812............................................................5
FUNCTIONAL DESCRIPTION HI9813............................................6
SPECIFICATIONS HI9813............................................................7
OPERATIONAL GUIDE ...................................................................8
pH CALIBRATION.......................................................................10
EC/TDS CALIBRATION.................................................................11
pH VALUES AT VARIOUS TEMPERATURES...................................12
TEMPERATURE COMPENSATION ..................................................13
EC/TDS COVERSION FACTOR.......................................................13
ELECTRODE CONDITIONING AND MAINTENANCE...........................14
ACCESSORIES.............................................................................16
BATTERYREPLACEMENT ..............................................................18
WARRANTY ................................................................................18
CE DECLARATION OF CONFORMITY..............................................19

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PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
Remove the instrument from the packing material and examine it
carefully to make sure that no damage has occurred during shipment.
If noticeable damage is found, notify your Dealer.
Each meter is supplied with:
• HI1285 combination, amplified, double-junction, gel pH
electrode with incorporated EC/TDS probe and built-in
temperature sensor and 1m (3.3') cable
•HI70004 pH 4.01 sachet (1 pc)
•HI70007 pH 7.01 sachet (1 pc)
•Instruction Manual
• 9 V battery.
Note:Saveallpackingmaterial untilyou are surethat the instrument
functions correctly. Any defective items must be returned in the
original packing together with the supplied accessories.
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTION
HI 9812 and HI 9813are the most complete and versatile portable
pH/EC/TDSmetersevermanufactured. Designedwithutmostprecision
and simplicity, these meters provide 3 kinds of measurements. The
pH, EC and TDS ranges are easily selected using a membrane
keyboard on the front panel.
Theconductivityofasolutiondependson the temperature and for this
reason measurements are carried out with reference to a standard
temperature of 25°C. If the solution measured has a different tem-
perature than 25°C, compensation must be performed.
HI 9812 and HI9813 automatically compensate for temperature
changeswithabuilt-in temperaturesensor andcircuitry.The tempera-
ture coefficient is fixed at 2%.
•HI 9812isapH/EC/TDS meter designed for simplicity ofusein
takingpH, µS/cm and ppm measurements. Suitedforaquariums,
fish-farming, seawater applications.
•HI 9813isapH/EC/TDS meter designed for simplicity ofusein
taking pH, mS/cm and ppm measurements. Suited for hydropon-
ics, greenhousing, farming and ground water applications.

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FUNCTIONAL DESCRIPTION HI 9812FUNCTIONAL DESCRIPTION HI 9812
FUNCTIONAL DESCRIPTION HI 9812FUNCTIONAL DESCRIPTION HI 9812
FUNCTIONAL DESCRIPTION HI 9812
1) LCD display
2) pH range selection key
3) µS/cm (EC) range selection key
4) EC/TDS calibration knob
5) ON/OFF key
6) ppm (TDS) selection key
7) pH offset calibration knob.

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HI 9812
Range pH 0.0 to 14.0
ppm 0 to 1990
µS/cm 0 to 1990
Resolution pH 0.1
ppm 10
µS/cm 10
Accuracy pH ±0.2
(@20°C/68°F) ppm ±2%f.s.
µS/cm ±2%f.s.
Conversion Factor 1µS/cm = 0.5 ppm
Typical EMC pH ±0.1
Deviation ppm ±2%f.s.
µS/cm ±2%f.s.
pH Calibration Manual 1 point through
offsettrimmer
Offset Calibration ±1.5 pH
EC/TDS Calibration Manual 1 point through slope trimmer
EC/TDS Temperature Automatic from 0 to 50°C (32 to 122°F)
Compensation with a ß of 2% per degree °C
Electrode HI 1285 combination pH/EC/TDS
electrode with temperature sensor
and 1 m (3.3') cable (included)
Battery Type 9 Volt
150 hours of continuous use
Environment 0 to 50°C (32 to 122°F);
max 95% RH non-condensing
Dimensions 185 x 82 x 45 mm
(7.3 x 3.2 x 1.8")
Weight 520 g (1.1 lb.)
SPECIFICATIONS HI 9812SPECIFICATIONS HI 9812
SPECIFICATIONS HI 9812SPECIFICATIONS HI 9812
SPECIFICATIONS HI 9812

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FUNCTIONAL DESCRIPTION HI 9813FUNCTIONAL DESCRIPTION HI 9813
FUNCTIONAL DESCRIPTION HI 9813FUNCTIONAL DESCRIPTION HI 9813
FUNCTIONAL DESCRIPTION HI 9813
1) LCD display
2) pH range selection key
3) mS/cm (EC) range selection key
4) EC/TDS calibration knob
5) ON/OFF key
6) ppm (TDS) selection key
7) pH offset calibration knob.

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SPECIFICATIONS HI 9813SPECIFICATIONS HI 9813
SPECIFICATIONS HI 9813SPECIFICATIONS HI 9813
SPECIFICATIONS HI 9813
HI 9813
Range pH 0.0 to 14.0
ppm 0 to 1999
mS/cm 0.00 to 4.00
Resolution pH 0.1
ppm 1
mS/cm 0.01
Accuracy pH ±0.2
(@20°C/68°F) ppm ±2% f.s.
mS/cm ±2%f.s.
Conversion Factor 1µS/cm = 0.56-0.72 ppm
Typical EMC pH ±0.1
Deviation ppm ±2%f.s.
mS/cm ±2%f.s.
pH Calibration Manual 1 point through
offsettrimmer
Offset Calibration ±1.5 pH
EC/TDS Calibration Manual 1 point through slope trimmer
EC/TDS Temperature Automatic from 0 to 50°C (32 to 122°F)
Compensation with a ß of 2% per degree °C
Electrode HI 1285 combination pH/EC/TDS
electrode with temperature sensor
and 1 m (3.3') cable (included)
Battery Type 9 Volt
150 hours of continuous use
Environment 0 to 50°C (32 to 122°F);
max 95% RH non-condensing
Dimensions 185 x 82 x 45 mm
(7.3 x 3.2 x 1.8")
Weight 520 g (1.1 lb.)

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OPERATIONAL GUIDEOPERATIONAL GUIDE
OPERATIONAL GUIDEOPERATIONAL GUIDE
OPERATIONAL GUIDE
INITIAL PREPARATION
Each meter is supplied complete with a 9V battery. Slide off the
battery compartment cover on the back of the meter (see page 18),
install the battery while paying attention to its polarity.
Connect the probe to the DIN socket on the
top of the meter by aligning the pins with
the socket and pushing in the plug.
Always remove the electrode protective cap before taking any mea-
surements.
Make sure the meter has been calibrated before taking any measure-
ments (see pages 10 and 11 for calibration
procedures).
Turn the meter on by pressing the ON/OFF key.
TAKING PH MEASUREMENTS
If the electrode has been left dry, soak the tip in a pH 7 or pH 4
buffer solution for a few minutes to reactivate it.
• To take a pH measurement simply submerge the tip
(4cm/1½")ofthecombination pH/EC/TDSelectrode
into the sample to be tested.
• Select the pH mode .
• Shaketheelectrodebrieflywhilesubmerged
and allow a couple of minutes for the
electrode to adjust and stabilize. The dis-
play will show the pH value.
• If measurements are taken in different samples successively, it is
recommended to rinse (clean) the electrode thoroughly to elimi-
nate cross-contamination. After cleaning, it is recommended to
rinse the electrode with some of the sample to be measured.

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TAKING EC/TDS MEASUREMENTS
• Immersethe tipofthe electrode (4cm/1½")into the
sample to be tested. If possible, use plastic beakers
or containers to minimize any EMC interference.
• Tap the electrode lightly on the bottom of the
beaker to remove any air bubbles which may be
trapped inside the tip.
• Select the appropriate measurement range (EC or TDS).
• Wait for 1-2 minutes for the temperature sensor to attain thermal
equilibrium. The display will then show the measurement auto-
matically temperature compensated for temperature with the
appropriate indication among the following:
µS symbol indicates the meter is in
µS/cm, EC mode (HI 9812 only)
mS symbol indicates the meter is in
mS/cm, EC mode (HI 9813 only)
- No symbol indicates the meter is in TDS
mode.
Note: If the display shows only a "1" on the
far left hand side, the meter is out of
range.
AFTER MEASUREMENTS
After measurements have been completed, the instrument should be
switchedoffand theprobe cleanedandcoveredwiththeprotectivecap.

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For greatest accuracy, frequent calibration of the instrument is recom-
mended. The instrument should be recalibrated for pH:
a) Whenever the electrode is replaced.
b) At least once a month.
c) Aftertesting aggressivechemicals.
d) Where extreme accuracy is required.
PREPARATION
Pour small quantities of pH 7.01 (HI 7007
or HI 8007) or pH 4.01 (HI 7004 or
HI 8004) or pH 10.01 (HI 7010 or HI
8010) solution into a clean beaker.
To obtain accurate readings, use pH 7.01 (HI 7007 or HI 8007) if
youaregoingto measureneutral orcloseto neutralsamples, pH4.01
(HI7004 or HI 8004) if you are going to measure acidic samples
or pH 10.01 (HI 7010 or HI 8010) for alkaline measurements.
Ifyou need to calibrate HI 9812 and HI 9813 to NBS standards, use
pH 6.86 (HI 7006 or HI 8006) instead of pH 7.01 and pH 9.18
(HI 7009 or HI 8009) instead of pH 10.01.
PROCEDURE
• Switchthemeteronafterconnectingtheelectrodeandpress pH to
display pH measurement.
•Removetheprotectivecap fromthe electrode,rinse
andimmerse itinthe buffer andstirgently. Wait a
couple of minutes for the reading to stabilize.
• Ifthebuffer solutionis notat ambienttemperature,
take its temperature with a ChecktempC (or an accu-
rate thermometer), e.g. 10.0°C.
Note:theelectrodeshouldbesubmergedapproximately4cm(1½")intothe
solution.TheChecktempCshouldbelocatedclosetotheelectrode.
• Adjust the pH calibration knob until the LCD
shows the pH value at the above temperature
(see the pH versus temperature chart on page
12).
• The pH calibration is now complete.
pp
pp
pH CALIBRATIONH CALIBRATION
H CALIBRATIONH CALIBRATION
H CALIBRATION