Instruction Manual
HI 98401
Microprocessor-based
Portable Fluoride Meter
Dear Customer,
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
correct use of the instrument, as well as a more precise idea of its
versatility. If you need additional technical information, do not hesitate to e-mail us at tech@hannainst.com.
These instruments are in compliance with the
EN 50081-1 and EN 50082-1.
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTS
TABLE OF CONTENTSTABLE OF CONTENTS
PRELIMINARY EXAMINATION .................................................................. 3
GENERAL DESCRIPTION .......................................................................... 3
FUNCTIONAL DESCRIPTION ..................................................................... 4
SPECIFICATIONS..................................................................................... 5
OPERATIONAL GUIDE .............................................................................. 6
CALIBRATION ......................................................................................... 8
TEMPERATURE CALIBRATION ................................................................ 10
ELECTRODE MAINTENANCE ................................................................... 12
BATTERY REPLACEMENT ....................................................................... 13
ACCESSORIES....................................................................................... 14
WARRANTY .......................................................................................... 15
CE DECLARATION OF CONFORMITY........................................................ 1 5
directives
Manufacturers since 1978
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.
2
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
Remove the instrument from the packing material and examine it
carefully to make sure that no damage has occurred during shipping.
If there is any noticeable damage, notify your Dealer or the nearest
Hanna office immediately.
Each meter is supplied with:
• AA type battery (4 pcs)
• Rugged carrying case
• Instruction manual
Note: Save all packing materials until you are sure that the instru-
ment functions correctly. Any damaged or defective item must
be returned in its original packing materials together with the
supplied accessories.
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTION
GENERAL DESCRIPTIONGENERAL DESCRIPTION
HI 98401 measures fluoride from 0.05 mg/L to 1.9 g/l in 5 distinct
scales. With auto-ranging HI 98401 automatically selects the range
that provides the best resolution. All results are displayed directly in
fluoride (F
ability, the measurements are performed utilizing, the optional FC
301B fluoride specific electrode and the separate HI 5313 reference
electrode.
HI 98401 compensates for temperature automatically from 5 to 35°C
using the optional HI 7662 stainless steel temperature probe. The
temperature mensured together with fluoride concentrations are displayed on the large LCD simultaneously.
All operations are microprocessor controlled for added precision and
simplicity. The calibration is automatic at one or two points. The first
calibration point is in the middle of the range at 100 mg/L (ppm). The
slope can then be selected for low fluoride measurements at 10 mg/L,
or higher contents at 1000 mg/L.
HI 98401 comes in a rugged waterproof casing so that measurements
may be performed indoors as well as outdoors. Four common AA type
batteries provide up to 120 hours of continuous operation.
--
-
--
) concentration. In order to guarantee maximum repeat-
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
1) Temperature probe connector
2) Reference electrode connector
3) Fluoride electrode connector (BNC)
4) Liquid Crystal Display (LCD)
5) ON/OFF button
6) CAL button
7) BUF button
8) CFM button
3
4
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONS
SPECIFICATIONSSPECIFICATIONS
OPERATIONAL GUIDEOPERATIONAL GUIDE
OPERATIONAL GUIDE
OPERATIONAL GUIDEOPERATIONAL GUIDE
--
-
Scale F
--
0.050 to 0.500 ppm
0.50 to 5.00 ppm
5.0 to 50.0 ppm
50 to 500 ppm
0.50 to 1.90 g/L
Temp. 0.0 to 50.0 °C
--
-
--
Resolution F
0.001 ppm
0.01 ppm
0.1 ppm
1 ppm
0.01 g/L
Temp. 0.1 °C
--
-
--
Accuracy F
±5% of reading or ±0.02 ppm (whichever
greater) with less than ±3°C difference from
calibration temperature; or
±10% of reading or ±0.02 ppm (whichever
greater) with temp. difference greater than ±3°C
Temp. ±0.5 °C
--
-
--
EMC F
± 2% f.s.
Deviation Temp. ±0.5°C
Calibration Automatic 1 or 2 points; first point at 100 ppm
second point at 10.0 or 1000 ppm
Temperature Automatic 5 to 35 °C (41 to 95°F)
Compensation with temperature probe attached
Electrode FC 301B, fluoride with 1m (3') cable and BNC
connector
HI 5313, reference with 1m (3') cable
Temperature HI 7662 with 1 m (3') cable
Probe
Power supply 4 x 1.5V AA alcaline batteries
120 hours of continuous use
Environment 0 to 50°C (32 to 122°F); 100% RH
Dimensions 196 x 80 x 60 mm (7.7x3.1x2.4")
Weight 450 g (15.9 oz.)
INITIAL PREPARATION:
The meter is supplied with 4 pieces of 1.5V AA-type alkaline batteries.
Remove the battery cover on the back of the meter and insert the
batteries while paying attention to their polarity.
Attach the fluoride electrode (#3 on
page 4), the reference electrode (#2)
F Electrod
Ref.
Temperature
probe
and the temperature probe (#1) to their
respective connectors on top of the meter.
Press the ON/OFF key to turn the meter on.
Note: The temperature probe can also be used on its own to measure
the temperature independently.
Note: If the temperature probe is not con-
nected, the lower display will indicate
25.0°C with the “°C” symbol blinking.
MEASUREMENT OF FLUORIDE ION CONCENTRATION
Note: Please ensure the meter is calibrated prior to proceeding any
further. In order to obtain accurate results, calibrate the meter
at a temperature no more than ±3°C away from the sample
to be measured subsequently.
Note: If the fluoride electrode is new, or it has not been used for a
few days, it must be soaked in a solution of HI 70702 (10 ppm
--
-
--
) for at least 3 hours prior to measurement.) for at least 3 hours prior to measurement.
of F
) for at least 3 hours prior to measurement.
) for at least 3 hours prior to measurement.) for at least 3 hours prior to measurement.
• Pour about 10-20 mL of the sample in a clean beaker and add the
same quantity of HI 7023 (TISAB) solution to the beaker. Mix the
solution for a few minutes.
• Rinse the electrodes with deionized water and dry them attentively
with a non-abrasive cloth.
• Immerse the fluoride and the reference electrode as well as the
temperature probe to a depth of at least 1 cm
(½”) in the prepared sample. Make sure that
the electrodes are not touching the bottom of
the beaker. Position the temperature probe close
to the tip of the other electrodes.
5
6
• Wait until the display stabilizes (about
10-15 minutes). The fluoride ion concentration and the temperature will be
displayed on the upper and lower displays, respectively.
Note: It is recommended to mix the sample during the measurement,
using a magnetic stirrer set at around 100 rpm.
CALIBRATIONCALIBRATION
CALIBRATION
CALIBRATIONCALIBRATION
In order to obtain accurate measurements, frequent calibration is
recommended.
For better results, calibrate at a temperature close to that of the
solution to be tested (no more than ±3°C apart).
The instrument can be calibrated at 1 or 2 points. Two-point calibration is always recommended for better accuracy.
The first point of calibration is fixed at 100 ppm (HI 70703). The
second point can be selected between 10.0 (HI 70702) and 1000
ppm (HI 70701). If the sample to be tested has low ionic strength
(below 100 ppm), use HI 70702 for the second point. Likewise, with
sample concentrations above 100 ppm, use HI 70701 as the second
calibration point.
MAGNETIC STIRRER
HI 190M
ON
POWER
OFF MAX
SPEED
Note: If the temperature probe is not connected, the meter will
naturally not compensate for the temperature variance. In this
case, accurate fluoride measurements are only possible if the
temperature of the sample and the calibration solutions are
close (no more than ±3°C apart).
TEMPERATURE MEASUREMENT
The temperature can be measured independently from fluoride concentration.
• Immerse the temperature probe to a depth of at
least 1 cm (½”) in the prepared sample.
• Wait for the reading to stabilize. The temperature
of the solution will be shown on the lower
part of the display.
7
PREPARATION
• Use only clean beakers.
Prepare two calibration solutions by mixing
sufficient quantity of 50% HI 70703 (100
ppm) and 50% HI 7023 (TISAB) solution in
one beaker and then 50% of HI 70702 (10.0
ppm) or HI 70701 (1000 ppm) solution and
50% HI 7023 (TISAB) in the other.
• Attach the fluoride electrode (#3 on page 4), the reference
electrode (#2) and the temperature probe (#1) to their respective connectors on top of the meter.
• Switch the meter on by pressing the ON/OFF button.
Note: For best results, it is recommended to prepare two beakers for
each calibration point: one beaker to rinse and the second one
to calibrate. This minimizes contamination of the calibration
solutions.
Note: Use plastic beakers to minimize electro-magnetic interference.
CALIBRATION PROCEDURE
Note: If the fluoride electrode is new, or it has not been used for a
few days, it must be soaked in a solution of HI 70702 (10 ppm
--
-
--
) for at least 3 hours prior to calibration.) for at least 3 hours prior to calibration.
) for at least 3 hours prior to calibration.
of F
) for at least 3 hours prior to calibration.) for at least 3 hours prior to calibration.
• Rinse the electrodes with deionized water and dry them attentively
with a non-abrasive cloth.
8
• Immerse the fluoride and the reference electrode as well as the temperature probe to a
depth of at least 1 cm (½”) in the prepared
buffer solution. Make sure that the electrodes
are not touching the bottom of the beaker.
Immerse the temperature probe close to the tip
of the other electrodes.
• Press CAL. The display will show “CAL” and “BUF” together with
an intermittent “~” symbol. The upper display will show the
calibration point (100 ppm) with the temperature of the solution
shown on the lower LCD.
• When the CON symbol appears, it means that the calibration
solution has been recognized and the reading has stabilized. Press
CFM to confirm the first calibration point.
Note: If the value of the calibration solution
measured by the meter is too far from
the ideal value, the “ “ symbol
starts blinking to indicate an error in
the calibration procedure. Ensure that the calibration solution is
fresh and the correct one (in this case 100 ppm), and that the
electrodes are in good working condition if necessary follow the
electrode maintenance procedure. Repeat the procedure with
fresh and/or new solutions and electrodes.
• After pressing CFM, the display will show
the second point of calibration (10.0 ppm).
Two-point calibration is always recommended, however, by pressing CAL one
can exit the calibration procedure at this point, having successfully
completed a one-point calibration.
• Press BUF to toggle between 10.0 and 1000
ppm and select the second calibration buffer.
9
• Immerse the fluoride and the reference electrode to a depth of at least 1 cm (½”) in the
second buffer solution. Make sure that the electrodes are not touching the bottom of the
beaker. Immerse the temperature probe close
to the tip of the other electrodes.
• When the CON symbol appears, it means that the second calibration solution has also been recognized and the reading has
stabilized. Press CFM to confirm.
• Calibration is now complete and the meter automatically returns
to the normal operational mode.
TEMPERATURE CALIBRATIONTEMPERATURE CALIBRATION
TEMPERATURE CALIBRATION
TEMPERATURE CALIBRATIONTEMPERATURE CALIBRATION
((
only for technical personnel)only for technical personnel)
(
only for technical personnel)
((
only for technical personnel)only for technical personnel)
All the meters are factory calibrated for temperature.
The temperature probes are interchangeable and no temperature cali-
bration is needed when they are replaced.
If, for any reason, the temperature measurements seem inaccurate,
temperature recalibration may be carried out.
For an accurate recalibration however contact your dealer or the
nearest Hanna Customer Service Center.
PREPARATION
• Prepare a vessel containing ice and water and another one containing hot water (at a temperature of around 50°C). Place
insulation material around the vessels to minimize temperature
changes.
• Connect the temperature probe (#1 on page 4) to the connector
on top of the instrument.
Note: If "°C" blinks, it means that the temperature probe is not
connected properly.
CALIBRATION PROCEDURE
• With the instrument turned off, press and hold CAL and then the
ON/OFF switch.
+
10
• The measured temperature is shown on the upper display.
• Immerse the temperature probe in a bath at 0.0°C.
• Press CAL. CAL and BUF will appear on the display with the
"
" symbol blinking. The upper part of the display shows the
calibration point (0.0 °C).
• When CON appears on the display it means that the value has
been recognized and the reading is stable. Press CFM to confirm.
Nota: If the reading of the instrument is too far from the expected
value (in this case 0.0°C), the "
"
symbol starts blinking to advise of an
error. In this case verify if the temperature of the bath is correct (for best
results, use a stirrer to agitate a solution of ice and water), and if the probe is functioning properly.
• Press CAL and then press BUF to visualize the second calibration
point (50.0 °C).
ELECTRODE MAINTENANCEELECTRODE MAINTENANCE
ELECTRODE MAINTENANCE
ELECTRODE MAINTENANCEELECTRODE MAINTENANCE
PREPARATION
The FC 301B fluoride electrode is sent dry to prolong
its life. The HI 5313 reference electrode instead should
HI 5313
be maintained wet with storage solution in the protective cap.
Remove the protective cap from the HI 5313 reference
electrode.
Presence of any salt deposits around the bottom of the
electrode is normal and they will wash away if rinsed
with deionized water.
If the junction of the HI 5313 reference electrode is
dry, soak the tip in a solution of HI 7082 or HI 8082
for at least one hour prior to operation.
If the bulb of the FC 301B single fluoride electrode is dry, soak the tip
--
-
--
in a solution of HI 70702 (10 ppm of F
before commencing to use it.before commencing to use it.
before commencing to use it.
before commencing to use it.before commencing to use it.
for at least three hours for at least three hours
)
for at least three hours
for at least three hours for at least three hours
STORAGE
The FC 301B fluoride electrode must be stored dry to prolong its life.
After use, rinse it with deionized water, dry it attentively with a nonabrasive cloth and store it dry.
The HI 5313 reference electrode on the other hand should be kept wet
for a rapid response. After use, rinse the electrode with deionized
water, fill the protective cap with a few drops of the HI 7082 or
HI 8082 solution and replace the cap on the electrode.
• Immerse the temperature probe in a bath at 50.0°C.
• When CON appears it means that the value has been recognized
and the reading is stable. Press CFM to confirm.
• Switch the meter off and back on again to return to normal
measurement mode.
11
PERIODIC MAINTENANCE
Periodically check the electrodes and cables. The cables should be
intact and show no sign of wear and tear. The electrode bulb and stem
should present no cracks (in which case it, must be replaced). The
connectors must be clean and dry. Rinse the reference electrode with
deionized water to wash away any salt deposits that there might be.
REFERENCE ELECTRODE CLEANING
General: Immerse the tip of the reference electrode in the
HI 7061 or HI 8061 General Cleaning Solution for
about one hour.
Protein: Immerse the tip of the reference electrode in the
HIHI
7073 7073
HI
7073 or
HIHI
7073 7073
HI 8073HI 8073
HI 8073 Protein Cleaning Solution for
HI 8073HI 8073
about 15 minutes.
12
Oil and fat: Rinse the electrode with the HI 7077 or HI 8077
Cleaning Solution.
FLUORIDE ELECTRODE CLEANING
General Rinse the fluoride electrode with deionized water.
Protein, oil Clean the tip of the electrode with a cotton wool
and fat soaked in alcohol. Afterwards rinse with deionized wa-
ter.
IMPORTANT: After cleaning, rinse the fluoride electrode well with
deionized water and dry it attentively with a nonabrasive cloth.
MALFUNCTIONING
• Reading fluctuates:
Could be due to dirty or blocked reference electrode junction:
follow the cleaning procedure above.
• Reading drifts:
Submerge the tip of the reference electrode in a HI 7082 or
HI 8082 solution at a temperature of 50-60°C for about an hour.
Afterwards, rinse with deionized water.
• No slope (meter always reads the same value) :
Bulb or the stem of the fluoride electrode might be cracked.
Repeat the measurement with a fresh fluoride electrode.
• Response (of the fluoride electrode) is sluggish:
Immerse the fluoride electrode in a HI 70702 solution for 3 hours.
BATTERY REPLACEMENTBATTERY REPLACEMENT
BATTERY REPLACEMENT
BATTERY REPLACEMENTBATTERY REPLACEMENT
When the batteries are run down "LOBAT" is
displayed on the Liquid Crystal Display. In this
case it is advisable to change the batteries as
soon as possible.
Battery replacement must only take place in a
non-hazardous area using alkaline batteries.
In order to replace run down batteries, simply
remove the two screws on the rear cover of the
instrument and replace the four 1.5V AA batteries with new ones, paying attention to the
correct polarity.
ACCESSORIESACCESSORIES
ACCESSORIES
ACCESSORIESACCESSORIES
Calibration Solutions
--
-
--
HI 70701/1L 1000 ppm F
HI 70701L 1000 ppm F
HI 70701M 1000 ppm F
HI 70702/1L 10.0 ppm F
HI 70702L 10.0 ppm F
HI 70702M 10.0 ppm F
HI 70703/1L 100 ppm F
HI 70703L 100 ppm F
HI 70703M 100 ppm F
solution, 1 L
--
-
--
solution, 460 mL
--
-
--
solution, 230 mL
--
-
--
solution, 1 L
--
-
--
solution, 460 mL
--
-
--
solution, 230 mL
--
-
--
solution, 1 L
--
-
--
solution, 460 mL
--
-
--
solution, 230 mL
HI 7023/1L TISAB II solution,1 L
HI 7023L TISAB II solution, 460 mL
Cleaning Solutions
HI 7061M General purpose cleaning solution, 230 mL
HI 7061L General purpose cleaning solution, 460 mL
HI 7073M Protein cleaning solution, 230 mL
HI 7073L Protein cleaning solution, 460 mL
HI 7077M Oil and fat cleaning solution, 230 mL
HI 7077L Oil and fat cleaning solution, 460 mL
HI 7082 Electrolyte solution 3.5M KCl, 4x30mL
HI 8061M General cleaning solution, 230 mL FDA approved bottle
HI 8061L General cleaning solution, 460 mL FDA approved bottle
HI 8073M Protein cleaning solution, 230 mL FDA approved bottle
HI 8073L Protein cleaning solution, 460 mL FDA approved bottle
HI 8077M Oil and fat cleaning solution, 230mL FDA approved bottle
HI 8077L Oil and fat cleaning solution, 460mL FDA approved bottle
HI 8082 Electrolyte solution 3.5M KCl, 4x30mL FDA approved
Another Accessories
FC 301B Fluoride electrode, 1m cable and BNC connector
HI 5313 Reference electrode, 1m cable and connector
HI 7662 Temperature probe, 1m cable and connector
HI 740027 1.5V AA battery (4 pcs)
HI 76405 Electrode holder
13
14
WARRANTYWARRANTY
WARRANTY
WARRANTYWARRANTY
HANNA LITERATUREHANNA LITERATURE
HANNA LITERATURE
HANNA LITERATUREHANNA LITERATURE
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 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 shipping 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.
CE DECLARATION OF CONFORMITYCE DECLARATION OF CONFORMITY
CE DECLARATION OF CONFORMITY
CE DECLARATION OF CONFORMITYCE 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
unacceptable interferences to radio and TV
equipment.
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.
To avoid damages or
burns, do not perform
any measurement in microwave ovens.
15
Hanna publishes a wide range of catalogs and handbooks for an equally wide range of applications.
The reference literature currently covers areas such as:
• Water Treatment
• Process
• Swimming Pools
• Agriculture
• Food
• Laboratory
• Thermometry
and many others. New reference material is constantly
being added to the library.
For these and other catalogs, handbooks and leaflets,
contact your dealer or the Hanna Customer Service
Center nearest to you. To find the Hanna Office in
your vicinity, check our home page at
www.hannainst.com.
PRINTED IN PORTUGAL
MAN98401R1 03/00
http://www.hannainst.com
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