Hanna Instruments HI98128 User manual

Operational Guide

To turn the meter on and check the
battery status

Press a nd hold the /MOD E button un til the LCD lig hts
up. All t he used segm ents on the LC D will be visib le for
1 secon d (or as long as the b utton is pr essed), fo llowed
by the pe rcent indic ation of the r emaining ba ttery li fe
(E.g. “ % 100 BATT”).

Taking measurements

Submer ge the elec trode in th e solution
to be tes ted while s tirring it g ently. The
measu rements sh ould be take n when
the st ability s ymbol on the to p left of the
LCD disappears.

The pH va lue automa tically co mpensate d for
tempe rature is sh own on the pr imary LCD wh ile the
secon dary LCD sh ows the temp erature of t he sample.

To freeze the display

While in m easuremen t mode, pre ss the
SET/HOLD b utton. “ HOLD“ appe ars on
the se condary di splay and th e reading
will be f rozen on the LC D (E.g. “pH 5.78 HOL D”). Pre ss
any but ton to retu rn to normal m ode.

To turn the meter o

While in n ormal mod e, press the /MODE button.
“OFF” w ill appear o n the second ary displa y. Release
the bu tton.

Notes: Before taking any measurements make sure
the meter has b een calibrate d (“CAL” tag present on
the LCD).
If measur ements are take n in differen t samples
successiv ely, rinse the prob e thoroughly t o eliminate
cross-con tamination a nd after clea ning, rinse th e
probe wi th some of the sam ple to be measur ed.

Setup

Setup m ode allows t he selec tion of tempe rature uni t
and pH bu er set. To enter th e Setup mod e, press the

/MODE b utton unt il “CAL” on the sec ondary dis play is
repla ced by “TEMP ” and the cur rent tempe rature uni t
(E.g. “ TEMP °C”) . Then:

• for °C / °F s electio n: Use the SET/HOL D button .

After t he tempera ture unit ha s been sele cted,
press t he /MODE butto n to enter the b uffer set
selec tion mode ; press the /M ODE butto n twice to
retur n to the norm al measuri ng mode.

• to chang e the calibr ation buf fer set: Af ter sett ing

the tem perature u nit, the me ter will show t he
curre nt buffer s et: “pH 7.01 BUFF” (for p H 4.01 /

7.01 / 10.01) or “pH 6.86 BUFF ”(for NIST 4.01 /

6.86 / 9.18). C hange the s et with the SE T/HOLD
but ton, then pre ss /MODE to return to n ormal
measuring mode.

pH Electrode Maintenance

• When no t in use, rins e the elect rode wit h water to
minimi ze contamin ation and s tore it wit h a few drops
of HI7030 0 storage s olution in t he protec tive cap.
DO NOT USE D ISTILLED OR DE IONIZED WATER FOR
STORAGE PURPOSES.

• If the el ectrode h as been lef t dry, soak in s torage
solut ion for at lea st one hour to r eactiv ate it.

• To prolong th e life of the pH e lectrod e, it is
recom mended to cl ean it month ly by immers ing
it in the H I7061 cleanin g solutio n for half an hou r.
After wards, r inse it thor oughly wit h tap water a nd
recalibrate the meter.

The pH el ectrode c an be easily r eplaced by us ing the
supplied tool (HI73128).

Inser t the tool in to
the electrode cavity
as show n above.

Pull th e electro de out by usin g the other s ide of the
tool. Inse rt a new pH ele ctrode fo llowing th e above
instr uction s in reverse o rder.

Rotat e the elect rode
counterclockwise.

Battery Replacement

The meter displays the remaining battery percentage
ever y time it is swi tched on. Wh en the bat tery leve l
is belo w 5%, the symb ol on the bot tom left of
the LCD li ghts up to ind icate a low ba ttery co ndition.
The ba tteries s hould be repl aced soon . If the bat tery
level is l ow enough to c ause erron eous readin gs,
the met er shows “% 0 B ATT” an d the Batt ery Erro r
Preve ntion Syste m (BEPS) will a utomatic ally turn
the met er o. To chang e the batte ries, remo ve the
4 screw s located o n the top of the m eter (g. 1).

g. 1 g. 2

Once th e top has been r emoved, ca refully rep lace the
4 bat teries loc ated in the co mpartm ent while pay ing
atte ntion to the ir polarit y (g. 2).
Replac e the top, maki ng sure that t he gasket
is prop erly seat ed in place, an d tighten the
screw s to ensure a wa tertigh t seal.

Note: Bat teries shou ld only be repla ced in a safe area
using the b attery t ype specifie d in this instru ction
manua l. Old batter ies should be d isposed in
accordance with local regulations.

^

Accessories

Electrode

Code Description

HI73127

HI73128

Replaceable pH electrode

Electrode removal tool

pH Buer Solution

Code Description

HI70004P

HI70006P

HI70007P

HI70009P

HI70010P

HI770710P

HI77400P

pH 4.01 sol ution, 20 mL s achet (25 p cs.)

pH 6.86 so lution, 20 m L sachet (2 5 pcs.)

pH 7.01 soluti on, 20 mL sach et (25 pcs.)

pH 9.18 so lution, 20 mL s achet (25 p cs.)

pH 10.01 sol ution, 20 mL s achet(2 5 pcs.)
pH 10.01 & 7.01 solut ion,
20 mL sac hets (10 pcs ., 5 ea.)

pH 4.01 & 7.01 solut ions, 20 mL sa chet
(10 pcs ., 5 ea.)

Electrode Cleaning Solution

Code Description

HI7061M

Electrode cleaning solution,
230 mL bo ttle

Electrode Storage Solution

Code Description

HI70300M

Electrode storage solution,
230 mL bo ttle

Other Accessories

Code Description

HI740026P

Replacement 1.5V batteries (12 pcs.)

Warranty

HI9812 7 and HI98128 ar e warrant ed for a perio d of
one yea r against de fects in wo rkmanshi p and materi als
when us ed for their in tended pur pose and ma intained
accor ding to instr uctions . The elec trode is war ranted
for a per iod of six mon ths. This w arranty i s limited to
repair o r replacem ent free of cha rge. Damag e due to
accid ents, misus e, tamper ing or lack of pr escribe d
mainte nance is not co vered. If se rvice is re quired,
conta ct your loc al Hanna oce. I f under war ranty,
repor t the mode l number, date of pu rchase, se rial
numbe r and the natu re of the prob lem. If the re pair is
not cove red by the war ranty, you w ill be notie d of the
charg es incurre d. If the inst rument is to b e returne d
to Hanna I nstrume nts, rst o btain a Retu rned Good s
Autho rizatio n (RGA) number f rom the Technic al
Ser vice depar tment and t hen send it wi th shippin g
cost s prepaid. Wh en shipping a ny instrum ent, make
sure it is properly packaged for complete protection.

IST98127 02/16

INSTRUCTION MANUAL

HI98127 • HI98128

Waterproof pH Testers with

Replaceable Electrode

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www.GlobalTestSupply.com

Preliminary Examination

Remove t he instru ment from th e packing ma terial
and ex amine it care fully to make s ure that no
damag e has occurr ed during shi pment. If n oticeable
damag e is evident , contact y our local Han na oce.
Each me ter is suppli ed with:

• HI73127 p H electro de

• HI7312 8 electro de removal to ol

• 1.5V bat teries (4 pc s.)

• Instruction manual

• Calibration card

Note: Save a ll packing ma terial until yo u are sure that
the inst rument func tions correc tly. All defecti ve items
must be re turned in the o riginal pac king togethe r with
the supplied accessories.

General Description

HI9812 7 (pHep®4) and HI98 128 (pHep®5) a re
water proof pH and t emperat ure meters . The housin g
has bee n completel y sealed ag ainst humidi ty and
desig ned to oat. A ll pH readin gs are automa tically
tempe rature com pensated (ATC) , and temper ature
value s can be displa yed in °C or °F uni ts.

Thes e meters ca n be calibra ted at one or t wo point s
with au to-bue r recognit ion and aga inst ve mem orized
buer v alues. A st ability i ndicator i s displayed o n the LCD
to ensure measurements are highly accurate.

At star t-up, these m eters indic ate batt ery level an d
will dis play a low bat tery sy mbol to aler t the user if t he
bat teries nee d to be replace d. In additi on, the Bat tery
Error Prevention System (BEPS) avoids erroneous
readi ngs by turnin g the meter o w hen batt ery volta ge
levels a re too low.

The inc luded HI731 27 pH elect rode can be e asily
repla ced and the s tainless s teel enca psulated
temperature sensor facilitates faster and more accurate
temperature measurement and compensation.

Functional Description

Battery
compartment

Liquid
Crystal
Display

SET/HOLD
button

/MODE

button

Temperature
sensor

HI73127 pH
electrode

LCD Description

1

2

3

4

1. ATC (Automa tic Temperatu re Compens ation)

indicator

2. Stabil ity indic ator

3. Bat tery life p ercentag e indicato r

4. Low ba ttery in dicator

5. Secondary display

6. Primary display

7. Measuring u nit for prim ary displa y

Hanna Ins truments res erves the rig ht to m odify the d esign,
construction, or appearance of its products without advance notice.

All rights a re reserved . Reproduct ion in whole or in p art is prohi bited
without th e written con sent of the copyri ght owner,
Hanna Ins truments In c., Woonsocket, Rh ode Island, 02895 , USA.

7

6

5

Specications

-2.0 to 16.0 pH (H I98127)

Range

Resolution

Accuracy
(@25 °C / 77 °F )

Temperature
Compensation

Environment -5 to 50 °C (2 3 to 122 °F); RH 100 %

Calibration

Electrode HI7312 7 pH electr ode (includ ed)

Ba tt er y Typ e 1.5V (4 pcs .)

Battery Life with BE PS / approx. 3 00 hours

Auto-off after 8 minutes of non-use

Dimensions

Weight 84 g (3.0 oz)

-2.00 to 16.0 0 pH (HI98128)

-5.0 to 60.0 ° C /

23.0 to 140.0 °F

0.1 pH (HI9 8127)

0.01 pH (HI9 8128)

0.1 °C / 0.1 °F

±0.1 pH (HI9 8127)
±0.05 pH (HI 98128)
±0.5 °C / ±1.0 ° F

automatic

1 or 2 poin ts with 2 set s of
memorized buffer s
(pH 4.01 / 7.01 / 10.01 or
pH 4.01 / 6.86 / 9 .18)

171 x 41 x 26 mm
(6.7 x 1.6 x 1.0” )

Calibration

For bet ter accur acy, frequen t calibrat ion of the
instr ument is rec ommended . In additio n, the
instrument must be recalibrated whenever:

a) The pH ele ctrode is r eplaced.
b) After testing aggressive chemicals.
c) Where hi gh accurac y is require d.
d) At leas t once a month .

Calibration procedure

From no rmal measu ring mode, p ress and hol d the

/MODE b utton unt il “OFF” on th e secondar y LCD
is repla ced by “CAL”.
Releas e the butt on. The LCD en ters the cal ibration
mode di splaying “p H 7.0 1 USE” (or “pH 6.86 USE ” if the
NIST bu er set was sel ected).
After 1 s econd the m eter acti vates the au tomatic
buer r ecogniti on feature. I f a valid bue r is
detec ted then it s value is sho wn on the pri mary
displa y and “REC” ap pears on t he secondar y LCD.
If no val id buer is det ected, th e meter keep s
the “US E” indicat ion activ e for 12 secon ds, and
then it r eplaces it w ith “WRNG ”, indic ating the
sampl e being meas ured is not a va lid buer.

For a single-point calibr ation with bu ers pH 4.01,

9.18 or 10.01 , the meter au tomatica lly accepts t he
calibr ation whe n the readin g is stable; t he meter
displa ys the accep ted buer, wit h the messa ge “OK 1”.
After 1 s econd the m eter automa tically re turns to th e
norma l measurin g mode.
If a sing le-point ca libratio n with buer p H 7. 01
(or pH 6.86) i s desired, th en after th e calibrat ion
point h as been accep ted the /MODE but ton must b e
press ed in order to r eturn to nor mal mode.
After t he butto n is pressed , the meter sh ows
“7.01” (or “6.86”) - “ OK 1” and, afte r 1 second, it
autom atically r eturns to th e normal me asuring mo de.

Note: A two -point calib ration is recom mended for
better accuracy.

For a two-po int calibration, place th e electro de in
pH 7.01 (or pH 6.86) bu er. After the r st calibr ation
point h as been accep ted, the “pH 4.0 1 USE” messa ge
appea rs. The me ssage is hel d for 12 secon ds, unless
a valid b uer is recog nized. If no v alid buer is
recog nized, then t he “WRNG” m essage is s hown.

If a vali d buer (pH 4.01 , 9.18 or 10.01) is detec ted,
then th e meter compl etes the ca libration p rocedure .
When th e buer is acce pted, the LCD s hows the
accept ed value wi th the “OK 2” m essage, an d then
the met er returns t o the norma l measuring m ode.

Note: When t he calibrati on procedure is co mpleted,
the “CA L” ta g is turned on.

To quit calibration and reset to default values

• Af ter enter ing the ca libratio n mode and b efore the f irst
poin t is accepte d, it is pos sible to qui t the proce dure and
retur n to the las t calibr ation dat a by press ing the /MODE
but ton. The se condar y LCD display s “ESC” fo r 1 second
and the m eter retur ns to the nor mal measu ring mode.

• To reset t o the defaul t values and c lear a previ ous
calibr ation, pr ess the SET/HOL D button a fter
enter ing the calib ration mo de and befor e the first
point i s accepted. T he seconda ry LCD displ ays
“CLR ” for 1 second, t he meter res ets to the de fault
calibr ation and t he “CAL” tag on th e LCD disappe ars.

Recommendations for Users

Befor e using Hanna p roduct s, make sure t hat they ar e
entir ely suitab le for your sp ecic app lication a nd for the
envir onment in wh ich they are u sed. Oper ation of th ese
instruments may cause unacceptable inter ferences to
other e lectro nic equipm ent. Take all neces sary st eps to
corre ct such int erferen ces. Avoid to uching th e probe
at all tim es. Any va riation in troduce d by the user to t he
suppli ed equipm ent may degr ade the ins trument ’s EMC
per formance. D o not put th e instrum ent in a micro wave
oven to av oid burns o r damage to eq uipment. D o not use
or stor e the instr ument in ha zardous en vironmen ts.

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www.GlobalTestSupply.com