Hanna Instruments HI 98402 User manual

1
www.hannainst.com
Instruction Manual
HI98402
Accurate
Fluoride and Temperature
Meter

2
TABLE OF CONTENTS
WARRANTY ............................................................................................. 2
PRELIMINARY EXAMINATION ...................................................................... 3
GENERAL DESCRIPTION ............................................................................ 3
FUNCTIONAL DESCRIPTION ........................................................................ 4
SPECIFICATIONS ....................................................................................... 5
OPERATIONAL GUIDE ................................................................................ 6
CALIBRATION .......................................................................................... 9
SETUP .................................................................................................. 11
TEMPERATURE CALIBRATION (for technical personnel only)......................... 12
BATTERY REPLACEMENT ......................................................................... 14
ACCESSORIES ........................................................................................ 14
LCD MESSAGE GUIDE .............................................................................. 15
ELECTRODE CONDITIONING & MAINTENANCE ............................................ 16
TROUBLESHOOTING GUIDE ..................................................................... 18
ACCESSORIES ........................................................................................ 19
Hanna Instruments reserves the right to modify the design, construction
and appearance of its products without advance notice.
Dear Customer,
Thank you for choosing a Hanna Instruments product.
Please read this instruction manual carefully before using the instru-
ment.
This manual will provide you with the necessary information for correct
use of the instrument, as well as a precise idea of its versatility.
If you need additional technical information, do not hesitate to e-mail
us at [email protected].
HI 98402 is guaranteed for two years against defects in workmanship
and materials when used for their intended purpose and maintained
according to instructions. Electrodes and probes are guaranteed for six
months. This warranty is limited to repair or replacement free of charge.
Damage due to accidents, misuse, tampering or lack of prescribed
maintenance is 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 problem. 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 Techni-
cal Service department and then send it with shipping costs prepaid.
When shipping any instrument, make sure it is properly packed for
complete protection.
WARRANTYWARRANTY
WARRANTYWARRANTY
WARRANTY

3
HI 98402 measures fluoride from 0.05 mg/L to 1.9 g/L in 5 distinct
scales. With auto-ranging HI 98402 automatically selects the range
that provides the best resolution. All results are displayed directly in
fluoride concentration. In order to guarantee maximum repeatability,
measurements are performed using the HI 4010 fluoride specific
electrode and the separate HI 5313 reference electrode.
HI 98402 compensates for temperature automatically from -5 to 55°C
using the optional HI 7662 stainless steel temperature probe. The
temperature measured together with fluoride concentrations are dis-
played on the large LCD simultaneously.
All operations are microprocessor controlled for added precision and
simplicity. The calibration can be performed at one or two points.
The calibration points can be chosen among 1 mg/L (ppm), 2 mg/L,
10 mg/L, 100 mg/L and 1000 mg/L.
HI 98402 is supplied in a rugged carrying casing complete with 3
batteries, that provide up to 200 hours of continuous operation.
GENERAL DESCRIPTION
PRELIMINARY 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, immediately notify your dealer.
Each meter is supplied complete with:
•Batteries (3 x 1.5V AAA)
•Instruction manual
•Rugged carrying case
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.

4
FUNCTIONAL DESCRIPTION
1) BNC electrode connector
2) Reference connector
3) Temperature probe socket
4) Battery holder cap
5) Liquid Crystal Display (LCD)
6) On/Off key, to turn the instrument ON and OFF.
7) CAL key, to enter/exit calibration mode.
8) Select key, to select setup item.
STD key, to select calibration standard.
9) Setup key, to enter/exit SETUP mode.
CFM key, to confirm calibration point.
10) Secondary LCD.
11) Primary LCD.

5
SPECIFICATIONS
EGNAR
)L/gm(mpp005.0ot050.0
)L/gm(mpp00.5ot05.0
)L/gm(mpp0.05ot0.5
)L/gm(mpp005ot05
L/g09.1ot05.0
)F°0.842ot04-(C°0.021ot0.02-
NOITULOSER
mpp100.0
mpp10.0
mpp1.0
mpp1
L/g10.0
)F°1.0(C°1.0
YCARUCCA
Fº86/Cº02@
ediroulFmpp20.0±rognidaerfo%5±
)erutarepmetnoitarbilacmorfC°3±htiw(
rorreeborpgnidulcxe)F°4.0±(C°2.0±
noitarbilaC tatniop2ro1,citamotuA
L/gm0001dnaL/gm001,L/gm01,L/gm2,L/gm1
noitasnepmocerutarepmeT )eborperutarepmethtiw(Cº55ot5–,citamotuA
sedortcelE
0104IH elbac)'3.3(m1dnaCNBhtiwedortceleediroulf
)dedulcniton(
3135IH )dedulcniton(elbac)'3.3(m1htiwedortceleecnerefer
eborperutarepmeT 2667IH )dedulcniton(elbac)'3.3(m1htiw
ecnadepmItupnI 01
21
mhO
efiL/epyTyrettaB seirettabAAAV5.1x3
thgilkcabtuohtiwesusuounitnocfosruoh002.xorppa
snoisnemiD )”4.1x8.2x3.7(mm63x27x581
)ylnoretem(thgieW ).zo6.01(g003
tnemnorivnE )Fº221–23(Cº05–0
%001HR.xam
ytnarraW sraey2

6
OPERATIONAL GUIDE
INITIAL PREPARATION
The instrument is supplied complete with batteries. For placing the
batteries inside the meter, see page 14.
To prepare the instrument for use, connect the Fluoride and the
reference electrodes to the input socketson the top of the instrument.
Connect the temperature probe to the temperature socket too. The
temperature probe is used in conjunction with the F+electrode for F+
temperature compensation, but it can also be used independently to
take temperature measurements. If the probe is disconnected, 25.0
°C (72.0 °F) is displayed with °C or °F symbol blinking.
Turn the instrument ON by pressing On/Off.
At start-up the display will show all
the used segments for a few seconds (or
while the button is held), followed
by the percentage indication of the
remaining battery life. The meter is
now ready to operate.
After measurement switch the instrument off, and remove the electrodes.
Rinse the HI 4010 electrode with deionized water, dry it with a non
abrasive cloth, and store it dry. The HI 5313 reference electrode should
be kept wet. After use, rinse it with deionized water, and store it with
a few drops of HI 7082 solution in the protective cap.
The auto-off feature turns the instrument off after a set period
(default 20 min) to save battery life. To set another period or to
disable this feature, see SETUP menu on page 11.
MEASUREMENT OF FLUORIDE ION CONCENTRATION
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.
Notes: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 4010-10 (10
ppm fluoride solution + TISAB) for at least 3 hoursfor at least 3 hours
for at least 3 hoursfor at least 3 hours
for at least 3 hours
prior to measurement.prior to measurement.
prior to measurement.prior to measurement.
prior to measurement.
If the instrument was not calibrated (at least 1 point) or the
calibration was cleared, the LCD will display “----”on the first
LCD line.

7
•Pour about 10-20 mL of the sample in a clean beaker and add
the same quantity of HI 4010-00 (TISAB) solution to the beaker.
Mix the solution for a few minutes.
•Rinse the electrodes with deionized wa-
ter 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.
•Wait until the display stabilizes (about
10-15 minutes). The fluoride ion con-
centration and the temperature will
be displayed on the upper and lower
displays, respectively.
Notes: •The reading is automatic temperature compensated in a -
5.0 to 55.0 °C temperature range. The ATC tag appears
on the LCD to indicate this. Outside this interval the meter
will not compensate for the temperature variance, and the
ATC tag will blink. The instrument will display the reading
taking into account a 25 °C temperature value.
•If the temperature probe is not connected, the meter will
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).
•It is recommended to mix the sample during the measure-
ment, using a magnetic stirrer set at around 100 rpm.
MAGNETIC STIRRER
HI 190M
POWER
SPEED
ON
OFF MAX

8
TEMPERATURE MEASUREMENT
The temperature can be measured independently from fluoride con-
centration.
•Immerse the temperature probe 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.
Notes:• If the temperature is out of range, the last range value
will be displayed and the “°C” (“°F”) tag will blink.
•If the temperature probe is not connected, the 25.0 °C
value will be displayed together with the blinking tags
“No Temp Probe” and “°C” (“°F”).

9
CALIBRATION
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 in 1 or 2 points. Two-point
calibration is always recommended for better accuracy.
The user can select the calibration stability criteria in Setup menu in
accordance with the application. “ACCU” - accurate is recommended.
Calibration points can be chosen among 1 ppm fluoride, 2 ppm , 10
ppm, 100 ppm and 1000 ppm.
PREPARATION
•The HANNA calibration solutions at 1 ppm (HI 4010-11), 2 ppm
(HI 4010-12) and 10 ppm (HI 4010-10) are already mixed with
TISAB II solution, while for 100 ppm (HI 4010-02) and 1000
ppm (HI 4010-05) it is necessary to prepare the calibration
solutions by mixing with TISAB II (HI 4010-00), 50% and 50%.
•Attach the fluoride and reference electrodes and the temperature
probe 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: the first one to rinse the probes and the
second one to calibrate.
Note: It is recommended to use clean plastic beakers.
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 4010-10 (10
ppm fluoride solution + TISAB) for at least 3 hoursfor at least 3 hours
for at least 3 hoursfor at least 3 hours
for at least 3 hours
prior to measurement.prior to measurement.
prior to measurement.prior to measurement.
prior to measurement.
•Rinse the electrodes with deionized water and dry them atten-
tively with a non-abrasive cloth.
•Submerse the fluoride and the reference elec-
trode as well as the temperature probe at least
1 cm (½”) in the calibration 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.
Note:A gentle stirring is recommended.

10
TWO-POINT CALIBRATION
•Press CAL. The instrument will dis-
play the measured Fluoride
concentration on the primary LCD,
if a previous calibration exists, or
“10.0” standard on the secondary
LCD, together with “CAL” and “Cal
Point 1” tags.
•If necessary, press the STD key to select a different standard value.
•If the STD key is pressed, the instrument circles through all
available calibration standards. Choose the point corresponding to
the first calibration solution.
•The “ ” tag will blink on the LCD until the reading is stable.
•When the reading is stable and close to the selected standard,
“CFM” tag blinks.
•Press CFM to confirm calibration.
•The calibrated value is then dis-
played on the primary LCD and
the secondary LCD will display the
second expected standard value,
together with “CAL” and “Cal
Point 2” tags.
•After the first calibration point is
confirmed, submerse the Fluoride,
the reference electrodes, and the temperature probe approximately
3 cm (1¼”) into the second standard solution and stir gently. The
temperature probe should be close to the pH electrode.
•If necessary, press the STD key to select the appropriate buffer value.
•The “ ” tag will blink on the LCD until the reading is stable.
•When the reading is stable and close to the selected buffer,
“CFM” tag blinks.
•Press CFM to confirm calibration.
•The instrument stores the calibra-
tion values and returns to normal
measurement mode.
ONE-POINT CALIBRATION
•Proceed as described in TWO-POINT CALIBRATION section.
•Press CAL after the first calibration
point was confirmed. The instruments
will memorize the one-point calibra-
tion data and will return to
measurement mode.