Hanna Instruments MULTIPARAMETER ION SPECIFIC METERS User manual

Instruction Manual
MULTIPARAMETER
ION SPECIFIC METERS
Manufacturers since 1978 TheseInstrumentsarein
Compliancewith the CEDirectives

2
DearCustomer,
Thank you for choosing a Hanna product. Please read this instruction
manualcarefullybeforeusingthemeter.Thismanualwillprovideyou
with the necessary information for the correct use of the instrument. If
you need additional technical information, do not hesitate to e-mail
us at [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
PRINCIPLE OF OPERATION.....................................................................................3
DISPLAY CODE GUIDE ............................................................................................ 5
TIPS FOR AN ACCURATE MEASUREMENT ............................................................... 6
COMMON SPECIFICATIONS ................................................................................... 6
HI 93710 - pH/CHLORINE ..................................................................................... 7
HI 93724 - CYANURIC ACID/pH .............................................................................9
HI93725 -pH/TOTALHARDNESS ........................................................................ 11
HI 93741 - TOTAL HARDNESS/IRON LOW RANGE.................................................. 13
HI 93742 - IRON LOW RANGE/MANGANESE LOW RANGE...................................... 15
HI 93743 - IRON LOW RANGE/pH........................................................................ 19
HI 93744 - pH/TOTAL HARDNESS/IRON LOW RANGE ............................................ 21
HI 93745 - pH/FREE & TOTAL CHLORINE
TOTALHARDNESS/IRONLOW RANGE............................................... 23
C 101 - pH/FREE & TOTAL CHLORINE/CYS/IODINE/BROMINE
IRONLOW RANGE ......................................................................... 26
C 104 - pH/FREE & TOTAL CHLORINE/CYS ........................................................... 29
BROMINE MEASUREMENT................................................................................... 32
FREE CHLORINE MEASUREMENT......................................................................... 34
TOTAL CHLORINE MEASUREMENT........................................................................36
CYANURIC ACID MEASUREMENT..........................................................................38
HARDNESS MEASUREMENT................................................................................. 39
IODINE MEASUREMENT.......................................................................................42
IRON LOW RANGE MEASUREMENT ...................................................................... 44
pH MEASUREMENT.............................................................................................46
BATTERY REPLACEMENT.......................................................................................47
ACCESSORIES .....................................................................................................48
WARRANTY .........................................................................................................49
OTHER ISM FROM HANNA................................................................................... 50
CE DECLARATION OF CONFORMITY...................................................................... 51

3
Remove the instrument from the packing material and examine it
carefully to make sure that no damage has occurred during ship-
ment. If there is any damage, notify your Dealer.
Each Ion Specific Meter is supplied complete with:
• 9V Battery
• Two Sample Cuvets and Caps*
• One Transport Cap
Note: Save all packing material until you are sure that the instru-
ment functions correctly. Any defective item must be returned
in its original packing with the supplied accessories.
* HI 93725 is supplied with 3 cuvets and caps
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
PRINCIPLE OF OPERATIONPRINCIPLE OF OPERATION
PRINCIPLE OF OPERATIONPRINCIPLE OF OPERATION
PRINCIPLE OF OPERATION
The color of every object we see is determined by a process of
absorption and emission of the electromagnetic radiation (light) of its
molecules.
Colorimetricanalysisisbasedontheprinciplethatspecific compounds
react with others and form a color, the intensity of which is
proportional to the concentration of the substance to be measured.
When a substance is exposed to a beam of light of intensity Io, a
portion of the radiation is absorbed by the substance's molecules and
a radiation of intensity I, lower than Io, is emitted.
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTION
The Hanna Instruments Ion Specific Meters are portable, microproces-
sor-based colorimeters that measure the ion content in water and
waste waters.
Themeters use an exclusive positive-lockingsystemto ensure that the
cuvet is in the same place every time it is placed into the measure-
mentcell.
The reagents are in liquid or powder form and are supplied in bottles
or in packets. The amount of reagent is precisely dosed to ensure
maximum repeatability.
Display codes aid the user in routine operations.
The meters have an auto-shut off feature that will turn the meter off
after 10 minutes of non-use.

4
The quantity of radiation absorbed is given by the Lambert-Beer
Law: log Io/I= ελc d
Where log Io/I = Absorbance (A)
ελ= molar extinction coefficient of the substance at
wavelength λ
c = molar concentration of the substance
d = optical distance light travels through sample
Therefore, the concentration "c" can be calculated from the color
intensity of the substance determined by the emitted radiation I, as
the other factors are known.
BLOCKDIAGRAMOF A COLORIMETER
A monochromatic LED (Light Emitting Diode) emits radiation at a
single wavelength, supplying the system with the intensity Io.
Since a substance absorbs the color complimentary to the one it emits
(for example, a substance appears yellow because it absorbs blue
light), Hanna colorimeters use LEDs that emit the appropriate
wavelength to measure the sample.
The optical distance (d) is measured by the diameter of the cuvet
containing the sample.
The photoelectric cell collects the radiation Ithat is not absorbed by
the sample and converts it into an electric current, producing a
potential in the mV range.
The microprocessor uses this potential to convert the incoming value
into the desired measuring unit and to display it on the LCD.
The measurement process is done in two phases: setting the meter to
zero and the actual measurement.
The cuvet has a very important role because it is an optical element,
and thus requires particular attention.
It is important that both the measurement and the calibration
(zeroing) cuvets are optically identical to provide the same measure-
ment conditions. Whenever possible use the same cuvet for both.
It is also necessary that the cuvet's surface is clean and not scratched,
in order to avoid measurement interference due to unwanted reflec-
tion and absorption of light.
LED
EMITTED LIGHT
CUVET MICROPROCESSOR
LIGHT
DETECTOR

5
It is recommended not to touch the cuvet walls with hands.
Furthermore, in order to maintain the same conditions during the
zeroing and the measuring phases, it is necessary to close the cuvet
to prevent any contamination.
This indicates that the meter is in a ready state
and zeroing can be performed.
Sampling in Progress. This prompt appears each
time the meter is performing a measurement.
This indicates that the meter is in a zeroed state
and measurement can be performed.
A zero reading was not taken. Insert a sample
before adding reagent and press ZERO.
Under range. A blinking "0.00" indicates that the
sample absorbs less light than the zero reference.
Check the procedure and make sure you use the
same cuvet for reference (zero) and measurement.
Over range. A flashing value higher than the
maximum concentration readable (see specifica-
tions) indicates that the sample absorbs too much
light, meaning that the concentration is too high.
Dilutethe sample.
Light over range. The cuvet is not inserted correctly
and an excess ambient light is reaching the
detector. If the cover is properly installed, then
contact your dealer or the nearest Hanna Customer
Service Center.
Light under range. The zero sample is too dark for
proper zeroing. If this is not the case, contact your
dealer or the nearest Hanna Customer Service
Center.
The "V" indicates that the battery voltage is
getting low and the battery needs to be replaced.
This indicates that the battery is dead and must
be replaced.
Note: once this indication is displayed, the meter
will lockup. Change the battery to restart.
DISPLAY CODE GUIDEDISPLAY CODE GUIDE
DISPLAY CODE GUIDEDISPLAY CODE GUIDE
DISPLAY CODE GUIDE
V

6
Theinstructionlisted below should becarefullyfollowedduringtesting
to ensure best accuracy.
• Donotletthetestsample stand too long after reagent isaddedor
accuracy will be lost.
• Wheneverthe cuvetisplaced intothemeasurement cell,itmust be
completely free of fingerprints, oil or dirt. Wipe it thoroughly with
HI 731318 or a lint-free cloth prior to insertion.
• It is important that the sample does not contain any debris. This
would corrupt the readings.
• Each time the cuvet is used, the cap must be tightened to the
same degree.
• It is possible to take multiple readings in a row, but it is
recommended that a zero reading be taken for each sample and
that the same cuvet is used for zeroing and measurement.
• It is important to discard the sample immediately after the
reading is taken because the glass might become permanently
stained.
• Shaking the cuvet can generate bubbles in the sample, causing
higher readings. To obtain accurate measurements, remove such
bubbles by swirling or by gently tapping the vial.
• All the reaction times reported in this manual are referred to
20°C (68°F). As a general rule of thumb, they should be doubled
at 10°C (50°F) and halved at 30°C (86°F).
TIPS FOR AN ACCURATE MEASUREMENTTIPS FOR AN ACCURATE MEASUREMENT
TIPS FOR AN ACCURATE MEASUREMENTTIPS FOR AN ACCURATE MEASUREMENT
TIPS FOR AN ACCURATE MEASUREMENT
COMMON SPECIFICATIONSCOMMON SPECIFICATIONS
COMMON SPECIFICATIONSCOMMON SPECIFICATIONS
COMMON SPECIFICATIONS
All the ion specific meters in this manual have the following common
features:
Light Life Life of the instrument
Light Detector SiliconPhotocell
Environment 0 to 50°C (32 to 122°F);
max 95% RH non-condensing
Battery Type/Life 1 x 9 volt/40 hours
Auto-Shut off After 10' of non-use
Dimensions 180 x 83 x 46 mm (7.1 x 3.3 x 1.8")
Weight 290 g (10 oz.)

7
HI 93710 - pH & ChlorineHI 93710 - pH & Chlorine
HI 93710 - pH & ChlorineHI 93710 - pH & Chlorine
HI 93710 - pH & Chlorine
The HI 93710 meter measures both pH and chlorine (Cl2, free and
total) content in water and wastewater in the following ranges:
pH 5.9 to 8.5 pH units
FreeChlorine 0.00 to 2.50 mg/L (ppm)
TotalChlorine 0.00 to 3.50 mg/L (ppm).
SPECIFICATIONS
Range pH 5.9 to 8.5
Free Cl20.00 to 2.50 mg/L
Total Cl20.00 to 3.50 mg/L
Resolution 0.1 pH/0.01 mg/L Cl2
Accuracy ±0.1 pH
±0.03 mg/L ±3% of Cl2reading
TypicalEMC ±0.2 pH
Deviation ±0.02 mg/L Cl2
Light Source Light Emitting Diode @ 555 nm
Method AdaptationoftheEPArecommendedDPDmethod
330.5 for chlorine analysis. The reaction with
reagents causes a pink tint in the sample.
For pH, Phenol red method. The reaction with
reagents causes a red tint in the sample.
REQUIRED REAGENTS
Code Unit Description Quantity
HI 93710-0 pH Phenol red 5 drops
HI 93701-0 FreeCl2DPD 1 packet
HI93710
pH/Chlorine

8
HI93710
pH/Chlorine
ON
OFF
HI 93711-0 Total Cl2DPD 1 packet
Liquid version (chlorine):
Code Unit Description Quantity
HI93701A-F Free Cl2DPD1indicator 3 drops
HI93701B-F Free Cl2DPD1buffer 3 drops
HI93701A-T TotalCl2DPD1indicator 3 drops
HI93701B-T Total Cl2DPD1buffer 3 drops
HI93701-C Total Cl2DPD3solution 1 drop
REAGENT SETS
HI93701-01 Reagents for 100 free chlorine tests
HI93701-03 Reagents for 300 free chlorine tests
HI93710-01 Reagents for 100 pH tests
HI93710-03 Reagents for 300 pH tests
HI93711-01 Reagents for 100 total chlorine tests
HI93711-03 Reagents for 300 total chlorine tests
HI93701-F Reagents for 300 free chlorine tests (liquid version)
HI93701-T Reagents for 300 total chlorine tests (liquid version)
For other accessories see page 48.
MEASUREMENT PROCEDURE
• Turn the meter on by pressing ON/OFF.
• The meter will automatically default to pH mea-
surement mode.
• When the LCD displays “- - -”, it is ready.
pH MEASUREMENTS
In order to perform pH measurements, follow the procedure on
page46.
CHLORINE MEASUREMENTS
• Press the pH/CL range key to select the chlorine scale. “C” will
appear on the LCD.
• Follow the procedureson page 34 and 36.
Note: Free and total chlorine have to be measured separately
following the indicated procedure with fresh unreacted samples
if both values are requested.
pH

9
HI 93724 - Cyanuric Acid & pHHI 93724 - Cyanuric Acid & pH
HI 93724 - Cyanuric Acid & pHHI 93724 - Cyanuric Acid & pH
HI 93724 - Cyanuric Acid & pH
HI93724
Cyanuric A. & pH
The HI 93724 meter measures cyanuric acid and pH content in water
and wastewater in the following ranges: 0 to 80 mg/L for Cyanuric
Acid (CYS) and 5.9 to 8.5 for pH.
SPECIFICATIONS
Range CYS 0 to 80 mg/L
pH 5.9 to 8.5
Resolution CYS 1 mg/L
pH 0.1
Accuracy CYS ±1 mg/L ±15% of reading
pH ±0.1
TypicalEMC CYS ±1 mg/L
Deviation pH ±0.1
Light Source Light Emitting Diode @ 555 nm
Method For pH, Phenol Red method. The reaction with
reagent causes a red tint in the sample.
For cyanuric acid, adaptation of the turbidimet-
ric method. The reaction between cyanuric acid
and the reagent causes a white suspension in
the sample.
REQUIRED REAGENTS
Code Unit Description Quantity
HI 93710-0 pH Phenol red 5 drops
HI 93722-0 CYS Powder Reagent 1 packet

10
REAGENT SETS
HI93710-01 Reagents for 100 pH tests
HI93710-03 Reagents for 300 pH tests
HI93722-01 Reagents for 100 CYS tests
HI93722-03 Reagents for 300 CYS tests
For other accessories see page 48.
MEASUREMENT PROCEDURE
• Turn the meter on by pressing ON/OFF.
• The meter will automatically default to pH mea-
surement mode.
• When the LCD displays “- - -”, it is ready.
pH MEASUREMENTS
In order to perform pH measurements, follow the procedure on
page46.
CYANURIC ACID MEASUREMENTS
• Press the pH/CYS key to select the cyanuric acid scale. “pH” will
disappear from the LCD.
• Follow the procedure on page 38.
ON
OFF
pH
HI93724
Cyanuric A. & pH

11 HI93725
pH & Total Hardness
HI 93725 - pH & Total HardnessHI 93725 - pH & Total Hardness
HI 93725 - pH & Total HardnessHI 93725 - pH & Total Hardness
HI 93725 - pH & Total Hardness
The HI93725meter measures pH and Magnesium/Calcium andTotal
Hardness content in water and wastewater.
SPECIFICATIONS
Range pH 5.9 to 8.5
Mg Hardness 0.00 to 2.00 mg/L
Ca Hardness 0.00 to 2.70 mg/L
Total Hardness 0.00 to 4.70 mg/L
Resolution pH 0.1
Hardness 0.01 mg/L
Accuracy pH ±0.1
Hardness ±0.11 mg/L ±5% of reading)
TypicalEMC pH ±0.1
Deviation Hardness ±0.02 mg/L
Light Source Light Emitting Diode @ 555 nm
Method For pH, Phenol red method. The reaction with
reagent causes a red tint in the sample.
For total hardness, adaptation of the Standard
Methods for the Examination of Water and
Wastewater,18 th edition,Calmagite/colorimet-
ric method. The reaction between hardness and
reagents causes a maroon tint in the sample.

12
ON
OFF
pH
HI93725
pH & Total Hardness
REQUIRED REAGENTS
Code Description Quantity
HI 93710-0 pH Phenol red 5 drops
HI 93719A-0 Ca & Mg indicator 0.5 mL
HI 93719B-0 Alkalisolution 0.5 mL
HI 93719C-0 EDTAsolution 1 drop
HI 93719D-0 EGTAsolution 1 drop
REAGENT SETS
HI93710-01 Reagents for 100 pH tests
HI93710-03 Reagents for 300 pH tests
HI93719-01 Reagents for 100 hardness tests
HI93719-03 Reagents for 300 hardness tests
For other accessories see page 48.
MEASUREMENT PROCEDURE
• Turn the meter on by pressing ON/OFF.
• The meter will automatically default to pH mea-
surement mode.
• When the LCD displays “- - -”, it is ready.
pH MEASUREMENTS
In order to perform pH measurements, follow the procedure on
page46.
HARDNESS MEASUREMENTS
• Press pH/HARDNESS to select the Hardness range (the LCD
displays"ZER1").
• Follow the procedure on page 39.

13 HI93741
Total Hardness & Iron LR
The HI 93741 meter measures the Iron (Fe) content and the Magne-
sium (Mg), Calcium (Ca) and Total Hardness in water and wastewater.
SPECIFICATIONS
Range Fe 0 to 400 µg/L
Mg Hardness 0.00 to 2.00 mg/L
Ca Hardness 0.00 to 2.70 mg/L
Total Hardness 0.00 to 4.70 mg/L
Resolution Fe 1 µg/L
Hardness 0.01 mg/L
Accuracy Fe ±10 µg/L ±8% of reading
Hardness ±0.11 mg/L ±5% of reading
TypicalEMC Fe ±1 µg/L
Deviation Hardness ±0.02 mg/L
Light Source Light Emitting Diode @ 555 nm
Method For Iron, Adaptation of the TPTZ Method. The
reaction between iron and the reagent causes a
blue tint in the sample.
ForHardness, adaptation of the Standard Meth-
ods for the Examination of Water and
Wastewater, 18th edition, Calmagite/colorimet-
ric method. The reaction between hardness and
reagents causes a maroon tint in the sample.
HI 93741HI 93741
HI 93741HI 93741
HI 93741
Total Hardness & Iron Low RangeTotal Hardness & Iron Low Range
Total Hardness & Iron Low RangeTotal Hardness & Iron Low Range
Total Hardness & Iron Low Range

14
REQUIRED REAGENTS
Code Unit Description Quantity
HI 93746-0 Iron LR TPTZ Reagent 2 packets
HI 93719A-0 Hardness Ca & Mg indicator 0.5 mL
HI 93719B-0 Hardness Alkalisolution 0.5 mL
HI 93719C-0 Hardness EDTAsolution 1 drop
HI 93719D-0 Hardness EGTAsolution 1 drop
REAGENT SETS
HI93746-01 Reagents for iron LR (100 packets)
HI93746-03 Reagents for iron LR (300 packets)
HI93719-01 Reagents for 100 hardness tests
HI93719-03 Reagents for 300 hardness tests
For other accessories see page 48.
MEASUREMENT PROCEDURE
• Turn the meter on by pressing ON/OFF. The meter
willautomaticallydefault to the ironmeasurement
mode and F will appear on the right to warn the
user.
• When the LCD displays “- - -”, it is ready.
• Refer to the manual pages below to measure the appropriate
parameter and for the required reagents:
IRON LR MEASUREMENT
• See page 44.
HARDNESS MEASUREMENT
• Press SET to select the hardness scale. “ZER1”
will appear on the LCD; then see page 39.
ON
OFF
HI93741
Total Hardness & Iron LR

15
The HI 93742 meter measures the iron and manganese content in
water, wastewater and seawater (iron only) in the following ranges:
Iron 0 to 400 µg/L (ppb)
Manganese 0 to 300 µg/L (ppb).
SPECIFICATIONS
Range Fe 0 to 400 µg/L
Mn 0 to 300 µg/L
Resolution 1 µg/L
Accuracy Fe ±10 µg/L ±8% of reading
Mn ±2 µg/L ±3% of reading
TypicalEMC ±1 µg/L
Deviation
Light Source Light Emitting Diode @ 555 nm
Method Adaptation of the TPTZ method for iron and
PAN method for manganese. The reaction be-
tween iron or manganese and the reagents
respectively causes a blue or an orange tint in
the sample.
REQUIRED REAGENT
Code Description Quantity
Iron
HI 93746-0 TPTZ reagent 2 packets
HI93742
Iron LR/Manganese LR
HI 93742 -HI 93742 -
HI 93742 -HI 93742 -
HI 93742 - Iron Low Range andIron Low Range and
Iron Low Range andIron Low Range and
Iron Low Range and
Manganese Low RangeManganese Low Range
Manganese Low RangeManganese Low Range
Manganese Low Range

16
ON
OFF
Fe
Mn
Manganese
HI 93748A-0 Ascorbicacid 2 packets
HI 93748B-0 Alkaline-cyanidesolution 0.40 mL
HI 93748C-0 0.1% PAN indicator 2 mL
HI93703-51 Dispersing Agent 4-6 drops (only
when necessary, see note)
REAGENT SETS
HI93746-01 Reagents for 50 iron LR tests
HI93746-03 Reagents for 150 iron LR tests
HI93748-01 Reagents for 50 manganese LR tests
HI93748-03 Reagents for 150 manganese LR tests
For other accessories see page 48.
MEASUREMENT PROCEDURE
• Turn the meter on by pressing ON/OFF.
• When the LCD displays "- - -", it is ready.
IRON MEASUREMENTS
• Select the iron parameter by pressing the Fe/
Mn key until "F" appears on the display.
• Follow the procedure on page 44.
MANGANESE MEASUREMENTS
• Selectthe manganeseparam-
eter by pressing the Fe/Mn
key until "n" appears on the
display.
• Fill one cuvet up to the mark with 10 mL of
deionized water.
• Fill a second cuvet up to the mark with 10 mL
ofsample.
HI93742
Iron LR/Manganese LR
Fe
Mn
10 mL
10 mL

17
HI93748A
B
C
• Add the content of one packet of
HI 93748A ascorbic acid to each
cuvet, replace the caps and shake
gently.
• Add 0.2 mL of the
HI93748Balkaline-
cyanide reagent
solutiontoeachcu-
vet, replace the
capsandshakegen-
tly.
• Add 1 mL of the HI 93748C
0.1%PANindicatorsolution
to each cuvet, replace the
caps and shake gently.
• Placethe cuvetwiththereacted deion-
ized water (blank) into the holder
and ensure that the notch on the cap
is positioned securely into the groove.
• Wait for 2 minutes and press ZERO. "SIP" will appear during
zeroing.
• Wait for a few seconds and the display will
show "-0.0-". Now the meter is zeroed and
ready for measurement.
• Insert the second cuvet with the reacted
sample into the instrument.
ZERO
12
3
6
9
2’
HI93742
Iron LR/Manganese LR

18
• Press READ. "SIP" will appear during measurement.
• The instrument directly displays concentration in µg/L of manga-
nese on the display.
Note: a temperature above 30°C may cause turbidity. In this case,
before zeroing and taking readings, add 2-3 drops of Dispers-
ing Agent (HI 93703-51) to each cuvet and swirl until
complete dissolution of the turbidity.
INTERFERENCES
Manganese
Interference may be caused by:
Aluminum above 20 mg/L
Cadmium above 10 mg/L
Calcium above 200 mg/L as CaCO3
Cobalt above 20 mg/L
Copper above 50 mg/L
Iron above 10 mg/L
Lead above 0.5 mg/L
Magnesium above 100 mg/L as CaCO3
Nickel above 40 mg/L
Zinc above 15 mg/L.
HI93742
Iron LR/Manganese LR

19 HI93743
IronLR &pH
The HI 93743 meter measures the pH and the Iron (Fe) content in
water and wastewater.
SPECIFICATIONS
Range Fe 0 to 400 µg/L
pH 5.9 to 8.5
Resolution Fe 1 µg/L
pH 0.1
Accuracy Fe ±10 µg/L ±8% of reading
pH ±0.1
TypicalEMC Fe ±1 µg/L
Deviation pH ±0.1
Light Source Light Emitting Diode @ 555 nm
Method For Iron, Adaptation of the TPTZ Method. The
reaction between iron and the reagent causes a
blue tint in the sample.
For pH, Phenol red method. The reaction be-
tween pH and the reagent causes a red tint in
the sample.
REQUIRED REAGENTS
Code Unit Description Quantity
HI 93746-0 Iron LR TPTZ Reagent 2 packets
HI 93710-0 pH Phenol red 5 drops
HI 93743HI 93743
HI 93743HI 93743
HI 93743
Iron Low Range & pHIron Low Range & pH
Iron Low Range & pHIron Low Range & pH
Iron Low Range & pH

20
REAGENT SETS
HI 93746-01 Reagents for iron LR (100 packets)
HI 93746-03 Reagents for iron LR (300 packets)
HI93710-01 Reagents for 100 pH tests
HI93710-03 Reagents for 300 pH tests
For other accessories see page 48.
MEASUREMENT PROCEDURE
• Turn the meter on by pressing ON/OFF. The meter
will automatically default to the pH measurement
mode and pH will appear on the left to warn the
user.
• When the LCD displays “- - -”, it is ready.
• Refer to the manual pages below to measure the appropriate
parameter and for the required reagents:
pH MEASUREMENT
• See page 46.
IRON LR MEASUREMENT
• Press SET to select the iron scale. “F” will
appear on the LCD; then see page 44.
ON
OFF
pH
HI93743
IronLR &pH