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

2
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

3
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.

4
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.

5
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

6
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.

7
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.)

8
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.

9
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.

10
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

11
EC/TDSEC/TDS
EC/TDSEC/TDS
EC/TDS CALIBRATIONCALIBRATION
CALIBRATIONCALIBRATION
CALIBRATION
Accessories needed:
• UseHI 7031 or HI 8031,1,413µS/cm (=1.413mS/cm)EC
solution for HI 9812 and HI 9813 or HI 7032, 1382 ppm
TDS solution for HI 9812 or HI 70442, 1500 ppm TDS
solutions for HI9813.
Note:theconversionbetween ECandTDS ismade byabuilt-in circuit,
hence it is requested to calibrate the meter only in EC or TDS
range. The other range is thus automatically calibrated.
PROCEDURE
• Pour approximately 4 cm (1½") of a con-
ductivity calibration solution (e.g. HI
7031/HI8031) into a beaker. If pos-
sible, use plastic beakers to minimize any
EMCinterference.
• Immerse the combined electrode in the solution.
• Wait for a couple of minutes for thermal equilib-
rium to be reached.
• Tap the combined electrode on the bottom, then
shake it lightly while rotating to make sure no air
bubbles remain trapped inside the probe.
• Select the appropriate range, e.g. µS/cm for HI 9812 or the mS/
cm key for the HI9813.
• Turn the EC/TDS calibration knob until the
display shows the EC or TDS reading at
25°C.
HI 7030

12
For temperature compensation during calibration, please refer to the
following chart.
pp
pp
pH VALUES AT VARIOUSH VALUES AT VARIOUS
H VALUES AT VARIOUSH VALUES AT VARIOUS
H VALUES AT VARIOUS
TEMPERATURESTEMPERATURES
TEMPERATURESTEMPERATURES
TEMPERATURES
TEMP pH VALUES
°C °F 4.01 6.86 7.01 9.18 10.01
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
32
41
50
59
68
77
86
95
104
113
122
131
140
149
158
4.01
4.00
4.00
4.00
4.00
4.01
4.02
4.03
4.04
4.05
4.06
4.07
4.09
4.11
4.12
6.98
6.95
6.92
6.90
6.88
6.86
6.85
6.84
6.84
6.83
6.83
6.84
6.84
6.85
6.85
7.13
7.10
7.07
7.04
7.03
7.01
7.00
6.99
6.98
6.98
6.98
6.98
6.98
6.99
6.99
9.46
9.39
9.33
9.27
9.22
9.18
9.14
9.10
9.07
9.04
9.01
8.99
8.97
8.95
8.93
10.32
10.24
10.18
10.12
10.06
10.01
9.96
9.92
9.88
9.85
9.82
9.79
9.77
9.76
9.75
For instance, if the buffer temperature is 25°C, the display should
show pH 4.0 or 7.0 or 10.0.
If the buffer temperature is 10°C, the display should show pH 4.0 or
7.0 or 10.1.
If the buffer temperature is 50°C, the display should show pH 4.0 or
6.9 or 9.8.

13
The TDS value in aqueous solutions is directly proportional to conduc-
tivity. The ratio between the two parameters depends on the solution.
HI 9812 has a fixed conversion factor set to 0.5 (corresponding to
a solution of CaCO3). This means that 1 µS/cm is equal to 0.5 ppm
(mg/L) of TDS.
HI 9813 has a variable conversion factor form 0.56 to 0.72 accord-
ing to TDS442 curve (see fig. below). TDS442 standard curve
represents the best approximation for the TDS measurement in the
field of hydroponics, farming and ground water, where many ingre-
dients in fertilizer mixtures and ground water are present.
EC/TDS CONVERSION FACTOREC/TDS CONVERSION FACTOR
EC/TDS CONVERSION FACTOREC/TDS CONVERSION FACTOR
EC/TDS CONVERSION FACTOR
Theconductivity of anaqueoussolution is themeasureof its abilityto
carry an electrical current by means of ionic motion.
The conductivity invariably increases with increasing temperature.
Itisaffected bythe typeand numberof ionsin thesolution andby the
viscosityofthe solutionitself.Bothparametersaretemperaturedepen-
dent.Thedependencyofconductivityon temperatureis expressedasa
relative change per degree Celsius at a particular temperature, com-
monly as percent per °C.
For common ionic solution, this value is about 2%/°C. Acids, alkalis
and concentrated salt solutions have somewhat lower value, typically
1.5%/°C.
Since a small difference in temperature causes a large change in
conductivity,it is necessarytocompensate for conductivity readingsat
high and low temperature. The readings are usually normalized at
25°C.
HI 9812 and HI9813 automatically compensate for temperature
differences with a built-in temperature sensor circuitry. With this
compensation, the display shows the readings at 25°C (77°F).
TEMPERATURE COMPENSATIONTEMPERATURE COMPENSATION
TEMPERATURE COMPENSATIONTEMPERATURE COMPENSATION
TEMPERATURE COMPENSATION

14
ELECTRODE CONDITIONINGELECTRODE CONDITIONING
ELECTRODE CONDITIONINGELECTRODE CONDITIONING
ELECTRODE CONDITIONING
AND MAINTENANCEAND MAINTENANCE
AND MAINTENANCEAND MAINTENANCE
AND MAINTENANCE
PREPARATION
Remove the protective cap.
DO NOT BE ALARMED IF ANY SALT DEPOSITS ARE PRESENT.
Thisis normal with pH electrodes and theywill disappearwhen rinsed
with water.
During transport tiny bubbles of air may have formed inside the glass
bulb. The pH electrode cannot function properly under these condi-
tions. These bubbles can be removed by "shaking down" the electrode
as you would do with a glass thermometer.
If the bulb and/or junction are dry, soak the electrode in HI 70300
Storage Solution for at least one hour.
TEST MEASUREMENT
Rinse the electrode tip with tap water.
Immersethetip(bottom 4cm /1½")inthesample andstir gentlyfor
approx. 30 seconds. Light tapping of the electrode on the bottom of
the beaker is sometimes necessary to eliminate air bubble trapped in
the electrode tip that could affect the EC/TDS reading.
Fora faster response of the pHreading andto avoid crosscontamina-
tion of the samples, rinse the electrode tip with the solution to be
tested,before taking your measurements.
STORAGE
When not in use, replace the protective cap.
PERIODIC MAINTENANCE
Inspecttheelectrodeandthecable.Thecableusedfortheconnectionto
the meter must be intact and there must be no points of broken
insulation on the cable or cracks on the electrode stem or bulb.
Connectors must be perfectly clean and dry. If any scratches or cracks
are present, replace the electrode. Rinse off any salt deposits with
water.
HI 1285 is a combined pH/EC/TDS electrode with built-in temperature sensor for EC/
TDS automatic temperature compensation. The probe screened cable is 1 m (3.3")
long.

15
CLEANING PROCEDURE
General Soak in Hanna HI 7061 General Cleaning Solu-
tion for approximately ½ hour.
Removal of films, dirt or deposits on the membrane/junction:
Protein Soak in Hanna HI 7073 Protein Cleaning Solu-
tion for 15 minutes.
Inorganic Soak in Hanna HI 7074 Inorganic Cleaning
Solution for 15 minutes.
Oil/grease Rinse with Hanna HI 7077 Oil and Fat Clean-
ing Solution.
IMPORTANT: After performing any of the cleaning procedures rinse
the electrode thoroughly with tap water and soak the electrode in
HI 70300 Storage Solution for at least 1 hour before taking a
measurement.
TROUBLESHOOTING
Evaluate your electrode performance on pH measurements based on
the following.
•Noise (Readings fluctuate up and down) could be due to:
- Clogged/Dirty Junction: Refer to the Cleaning Procedure
above.
•Dry Membrane/Junction: Soak in Storage Solution HI 70300
for at least 1 hour.
•Drifting:Soaktheelectrodetip inwarm HannaSolutionHI 7082
for one hour and rinse tip with distilled water (refill with fresh
HI 7071 for single junction electrodes and HI 7082 for double
junctionelectrodesifnecessary).
•Low Slope: Refer to the cleaning procedure above.
•No Slope: - Check the electrode for cracks in glass stem or
bulb (replace the electrode if cracks are found).
- Make sure cable and connections are not dam-
aged nor lying in a pool of water or solution.
•Slow Response/Excessive Drift: Soak the tip in Hanna Solu-
tion HI 7061 for 30 minutes, rinse thoroughly in distilled water
and then follow the Cleaning Procedure above.
Note:for fieldapplications, itis alwaysrecommendedtokeepaspare
electrode handy. When anomalies are not resolved with simple
maintenance, change the electrode (and recalibrate the meter)
to see if the problem is alleviated.

16
ACCESSORIESACCESSORIES
ACCESSORIESACCESSORIES
ACCESSORIES
pH CALIBRATION SOLUTIONS
HI 70004P pH 4.01 Buffer Sachets, 25 x 20 mL
HI 7004M pH 4.01 Buffer Solution, 230 mL
HI 7004L pH 4.01 Buffer Solution, 460 mL
HI 7006M pH 6.86 Buffer Solution, 230 mL
HI 7006L pH 6.86 Buffer Solution, 460 mL
HI 70007P pH 7.01 Buffer Sachets, 25 x 20 mL
HI 7007M pH 7.01 Buffer Solution, 230 mL
HI 7007L pH 7.01 Buffer Solution, 460 mL
HI 7009M pH 9.18 Buffer Solution, 230 mL
HI 7009L pH 9.18 Buffer Solution, 460 mL
HI 70010P pH 10.01 Buffer Sachets, 25 x 20 mL
HI 7010M pH 10.01 Buffer Solution, 230 mL
HI 7010L pH 10.01 Buffer Solution, 460 mL
pH CALIBRATION SOLUTIONS IN FDA APPROVED
BOTTLE
HI 8004L pH 4.01 Buffer Solution, 460 mL
HI 8006L pH 6.86 Buffer Solution, 460 mL
HI 8007L pH 7.01 Buffer Solution, 460 mL
HI 8009L pH 9.18 Buffer Solution, 460 mL
HI 8010L pH 10.01 Buffer Solution, 460 mL
CONDUCTIVITY & TDS BUFFER SOLUTIONS
HI 7031L 1413 µS/cm (µmho/cm), 460mL
HI 7031M 1413 µS/cm (µmho/cm), 230mL
HI 7033L 84 µS/cm (µmho/cm), 460 mL
HI 7033M 84 µS/cm (µmho/cm), 230 mL
HI 7032L 1382 ppm (mg/L), 460 mL
HI 7032M 1382 ppm (mg/L), , 230 mL
CONDUCTIVITY BUFFER SOLUTIONS IN FDA APPROVED
BOTTLES
HI 8031L 1413 µS/cm (µmho/cm), 460 mL
HI 8033L 84 µS/cm (µmho/cm), 460 mL
ELECTRODE STORAGE SOLUTIONS
HI 70300M Storage Solution, 230 mL

17
HI 70300L Storage Solution, 460 mL
ELECTRODE STORAGE SOLUTIONS IN FDA APPROVED
BOTTLE
HI 80300M Storage Solution, 230 mL
HI 80300L Storage Solution, 460 mL
ELECTRODE CLEANING SOLUTIONS
HI 70000P Electrode Rinsing Sachets, 25 x 20 mL
HI 7061M General Cleaning Solution, 230 mL
HI 7061L General Cleaning Solution, 460 mL
HI 7073M Protein Cleaning Solution, 230 mL
HI 7073L Protein Cleaning Solution, 460 mL
HI 7074M Inorganic Cleaning Solution, 230 mL
HI 7074L Inorganic Cleaning Solution, 460 mL
HI 7077M Oil & Fat Cleaning Solution, 230 mL
HI 7077L Oil & Fat Cleaning Solution, 460 mL
ELECTRODE CLEANING SOLUTIONS IN FDA APPROVED
BOTTLE
HI 8061M General Cleaning Solution, 230 mL
HI 8061L General Cleaning Solution, 460 mL
HI 8073M Protein Cleaning Solution, 230 mL
HI 8073L Protein Cleaning Solution, 230 mL
HI 8077M Oil & Fat Cleaning Solution, 230 mL
HI 8077L Oil & Fat Cleaning Solution, 460 mL
OTHER ACCESSORIES
CHECKTEMPCElectronic thermometer (range: -50.0 to 150.0°C)
HI 710001 Soft carrying case
HI 710009 Shockproof, blue rubberboot
HI 710010 Shockproof, orange rubberboot
HI 710031 Rugged carrying case
MAN9812R1 Instructions manual

18
WARRANTYWARRANTY
WARRANTYWARRANTY
WARRANTY
All Hanna Instruments meters are warranted for two years against
defects in workmanship and materials when used for their intended
purpose and maintained according to instructions. The electrodes and
the probes are warranted for a period of six months. This war-
ranty is limited to repair or replacement free of charge.
Damagesduetoaccident,misuse,tamperingorlackofprescribedmainte-
nanceare not covered.
If service is required, contact the dealer from whom you purchased the
instrument.Ifunderwarranty,reportthemodelnumber,dateofpurchase,
serialnumber and the nature of the failure. If the repair is not covered by
thewarranty,youwillbenotifiedofthechargesincurred.Iftheinstrument
is to be returned to Hanna Instruments, first obtain a Returned Goods
Authorization number from the Customer Service department and then
sendit with shipping costsprepaid.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,
HannaInstrumentsInc.,584ParkEastDrive,Woonsocket,Rhode Island,
02895 , USA.
HannaInstrumentsreserves theright tomodifythedesign,construction
and appearance of its products without advance notice.
BATTERY REPLACEMENTBATTERY REPLACEMENT
BATTERY REPLACEMENTBATTERY REPLACEMENT
BATTERY REPLACEMENT
All meters are powered by a 9V battery that is
located on the rear of the instrument.
When the battery becomes weak reaching a cer-
tain threshold, the instrument automatically
switches off.
Replacement must only take place in a nonhaz-
ardous area using an alkaline 9V battery.
To access the battery, remove the battery cover by
applying pressure in the direction indicated. Re-
place the old battery with a new one while paying
attention to its polarity.

19
CE DECLARATION OF CONFORMITYCE DECLARATION OF CONFORMITY
CE DECLARATION OF CONFORMITYCE DECLARATION OF CONFORMITY
CE DECLARATION OF CONFORMITY
Recommendations for Users
Before using these products, make sure that they are entirely suitable for the environment in which
theyareused.
Operationoftheseinstrumentsinresidential areas could causeunacceptableinterferencestoradioand
TV equipment.
Themetalband atthe end ofthe electrode issensitive to electrostaticdischarges. Avoid touchingthis
metalbandallthetimes.
The glass bulb at the end of the electrode is sensitive to electrostatic discharges. Avoid touching this
glassbulbatalltimes.
During operation, ESD wrist straps should be worn to avoid possible damage to the electrode by
electrostaticdischarges.
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 24VAC or 60VDC.
Toavoiddamagesor burns, donotperformany measurement in microwaveovens.

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MAN9812R1
12/98
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