Hanna Instruments HI981030 Instruction Manual

INSTRUCTION MANUAL

All righ ts are reserv ed. Reprodu ction in who le or in part i s prohibite d without th e written con sent of
the copyri ght owner, Hann a Instrumen ts Inc., Woonsocke t, Rhode Island , 02895, USA.

IST981030 05/18-1

To obtain the hi ghest accurac y for measureme nts it is import ant to follow the se tips:

• Fresh buf fer should be use d for each ca libratio n. Calibration is only as g ood as the
buffe r being use d. The pH buf fer values c hange over ti me once the sa chets are op ened.

• The probe s hould be rinsed wi th purified wat er each time befo re placing in buff er or
sample to b e tested.

• When the me ter is not in use it i s important to a dd several dro ps of storage s olution to
the prote ctive cap to ke ep the probe hydr ated. If stora ge solution is no t available, pH

4.01 or pH 7.01 buffer can be u sed.

• For improv ed accuracy it is r ecommended t o calibrate in tw o buffers .

• It is import ant to calibrate and me asure samples at the s ame temperature as t here
is no temperature compensation. A dramatic change in temperature between buffer
solutio ns and samples to b e tested will gi ve inaccurate re adings.

Refilling the Electrode

• If fouled, remove the s leeve and r inse slee ve and sens or tip wit h purifi ed water.
Turn over the probe, remo ve the sle eve by care fully rot ating it and pull strai ght
along the axis of the el ectro de. Use
care as the pH s tem is made of glass.
Rinse of f any traces of ele ctrolyte g el.

• Soak the s ensor tip i n HI70061G,
HI700661P, HI700663P o r HI700664P
cleaning s olution f or 20 minu tes t hen
rinse wit h purified wat er.

• Refill the r eferen ce well wit h HI9071
Gelled Bridge Electrolyte.

• Replace the refere nce sleeve: inser t and
push the sl eeve onto the ele ctrode. Make
sure the bla ck O-ring i s fixed in side the
electr ode body. Any excess o f gel will be
expelle d from the end of t he electro de through the o pen junction .

• Rinse any ex cess gel off wi th purified wate r and gently dry of f
body wit h a soft cloth o r tissue.

• Soak assembled probe in Electrode storage solution for a
minimum of 30 min utes.

• Rinse prob e with purifi ed water.

• Shake the el ectro de down as yo u would do wi th a clinical
thermom eter to elimina te any air bubbles in side the glass b ulb.

• Calibrate in fresh buffers before using for measurements.

Care and Maintenance

To change the C R2032 Li-ion ba ttery, tur n the batter y cover locat ed on the back of t he meter
counterc lockwise t o unlock. Remov e cover and repl ace the batt ery with + side f acing up.

Note: Batte ries should only be r eplaced i n a safe area u sing the b atter y
type spe cified in t his inst ructio n manual. Old bat teries sh ould be di sposed in
accordance with local regulations.

Battery Indicator

The meter features a low battery indicator. When
the battery is running low, the tag will blink on
screen. When the battery has been depleted,
“Erb” will appear on screen and the meter will
turn off.

Clear Calibration

Place meter in calibration mode. Press and hold
ON/OFF until “CLr” is displayed. The meter will
now be at default calibration.

“Err” Message

In calibration mode, if the meter displays an
“Err” message when in the correct fresh buffer
solution then the probe should be cleaned.
Place the probe in the cleaning solution for
20 minutes. Rinse with purified water and place
in storage solution for a minimum of 30 min utes
before calibrating.

Battery Replacement

Auto-off

From measurement mode, press and hold the
ON/OFF button. The meter will cycle through
“OFF,” “CAL,” then current auto-off setting.
The default setting is 8 minutes (“d08”). Press
ON/OFF button to change. “d60” is auto-off after
60 minutes, and “d--” disables the auto-off
feature. Press and hold the button to exit the
menu.

Electrode Cleaning Solutions

Code Description

HI700 61G GroLine general purpose cleaning solution, 20 mL sachets (25 pcs.)
HI70 0661P General p urpose cl eaning sol ution for a gricultur e, 20 mL sache ts (25 pcs.)
HI700663P Cleaning solu tion for soil d eposits, 2 0 mL sachets (25 p cs.)
HI700664P Cleaning solu tion for humus d eposits , 20 mL sachets (2 5 pcs.)

pH Buffe r Solution

Code Description

HI70004G Gro Line pH 4.01 buf fer solut ion, 20 mL sach ets (25 pcs.)
HI70007G Gro Line pH 7.01 buffe r solution , 20 mL sachet s (25 pcs.)
HI774 00P pH 4.01 & 7.01 buff er solutio n, 20 mL sachet s (10 pcs., 5 ea.)

Accessories

Recommendations for Users

Before us ing this produc t, make sure it is enti rely suitable f or your specif ic application an d for the
environm ent in which it i s used. Any var iation intr oduced by th e user to the s upplied equi pment may
degrade t he meters’ pe rformance. F or yours and th e meter’s safet y do not use or st ore the meter in
hazardous environments.

Warranty

The meter is warranted for a period of one year against defects in workmanship and materials when
used for their intended purpose and maintained according to instructions. 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 your local Hanna Instruments Office. 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 (RGA) number from the
Technical Service department and then send it with shipping costs prepaid. When shipping any instrument,
make sure it is properly packaged for complete protection.

Certification

All Hanna Instruments conform to the CE European Directives.
Disposal of Electrical & Electronic Equipment. The product should not be treated as household

waste. Instead hand it over to the appropriate collection point for the recycling of electrical and electronic
equipment which will conserve natural resources.

Disposal of waste batteries. This product contains batteries, do not dispose of them
with other household waste. Hand them over to the appropriate collection point for recycling.

Ensuring proper product and battery disposal prevents potential negative consequences for the
environment and human health. For more information, contact your city, your local household waste
disposal service, the place of purchase or go to www.hannainst.com.

RoHS

compliant

HI981030

Soil pH Tester

Other Accessories

Code Description

HI721 319 Soil auger
HI705 1M Soil preparation solution, 230 mL bottle

Electrode Storage Solutions

Code Description

HI70300G G roLine elec trode sto rage solut ion, 20 mL sachet s (25 pcs.)
HI70300-023 GroLine e lectrode s torage sol ution, 230 mL bo ttle
HI9072 Electr ode storage s olution, 13 mL dro pper

Electro de Fill Solution

Code Description

HI9071 Gelled Br idge Electr olyte

Specifications

Range 0.0 to 14.0 pH
Resolution 0.1 pH
Accuracy ±0.2 pH @25 °C/ 77 °F
Calibration Automatic, one or two-point
Electrode Built-in probe for specific application
Batte ry Type CR2032 Li-ion
Batter y Life Approximat ely 1000 hours of co ntinuous use
Auto-off 8 minutes, 6 0 minutes or can be di sabled
Environment 0 to 50 °C (32 to 122 °F); RH 95% max
Dimensions 51 x 151 x 21 mm (2 x 5.9 x 0.9“)
Weight 44 g (1.6 oz.)

Preliminary Examination

Remove the m eter from th e packing mat erial and examin e it carefully t o make sure that
no damage has o ccurred durin g shipment. If not iceable damag e is evident, con tact your
local Hanna In struments O ffice.
Each meter i s supplied with:

• pH 4.01 buffer s olution liquid sa chet (2 pcs.)

• pH 7.01 buffer solut ion liquid sachet (2 p cs.)

• Cleaning solution for soil deposits

• Cleaning solution for humus deposits

• Electrode storage solution, 13 mL dropper

• Electrode fill solution

• Instruction manual

• Quality certificate

Note: Save all p acking material u ntil you are sure that t he instrument functions
correctl y. All defective item s must be returned i n the original pa ckaging with the
supplied accessories.

Liquid Cr ystal
Display

ON/OFF
Button

Maximum
Immersio n
Level

Recommended
Immersion Level

Procedure for Direct Ground Measurement

1) Verify meter is set up correctly and pH probe is calibrated.

2) Dig, discarding 5 cm of topsoil.

3) Perforate the soil (with HI721319 soil auger) to a depth of about 20 cm or more.

4) If the soil is dry, moisten it with a small amount of tap water.

5) Wash the electrode with tap water (not distilled).

6) Insert the electrode pushing it slightly into the soil to ensure proper contact.

7) Observe the measurement.

8) Wash the electrode with tap water (not distilled) and (using a finger) gently remove
any soil remaining on the electrode (avoid using a rag or cloth).

9) Repeat the procedure in different locations in the field.

10) Consider the average of the measured data.

For best r esult, it is advisabl e to measure the pH of a s oil solution, using a s ample of
soil and soil preparation solution HI7051; it is bette r to use this proce dure if you have
to test a st ony field in whic h you risk damaging t he electrode .

Probe Features

Removable PVDF reference sleeve

Polyvi nylidene fluorid e (PVDF) is a durable plas tic that is resist ant to most chemical s
and solve nts, including so dium hypochlori te. It has high abrasion r esistance, mec hanical
strengt h and resistan ce to ultravio let. PVDF is also re sistant to fun gal growth.

Operation

Press th e ON/OFF but ton to turn th e meter on. All ta gs
will be displayed.

The meter w ill go into m easure ment mode : current
reading an d calibrated b uffers a re displayed .

Meter Calibration

From measurement
mode, press and
hold the ON/OFF
button until “CAL”
is displayed.

When “7.01” blinks
on the display, place
the tip of the probe
into a pH 4.01, 7.01
buffer solution.

When the
reading is s table,
the stab ility
indicator will
disappe ar.“Sto”
will be disp layed
when the
calibration
is saved.

If pH 4.01 buff er
solutio n is used
as the fir st point

the value of the
buffe r is recogni zed
and displayed
with the blinking
stability indicator.

Meter wil l
exit to
measurement
mode and th e
calibration
tag will be
displayed.

One-Point Calibration with pH 4.01

B

One-Point

Meter will exit
to measurement
mode and the
calibration
tag will be
displayed.

pH 4.01 will then
blink on the display.
Ignore it an d press
ON/OFF button.

Two- Point

Use pH 4.01 to
perform a two­point calibration.
The value is
automatically
recognized and
displayed with the
blinking stability
indicator.

When the reading
is stable, the
stability indicator
will disappear.
“Sto” will be
displayed when
the calibration
is saved.

Meter will exit
to measurement
mode and the
calibration
tags will be
displayed.

If pH 7.01 buffer solution is used as
the first point the buffer is recognized

with the blinking stability indicator.
When the reading is stable, the
stability indicator will disappear
and pH 7.01 will be calibrated.

If pH 7.01 is the only calibration point,

finish one-point procedure at right.

If using pH 4.01 as a second point,

continue two-point procedure at right.

Meter Overview

Preparation:

The pH elec trode is shipp ed ready for u se with a prote ctive cap con taining stor age solution . Before
using the m eter, remove the pro tective cap and in spect the probe t o verify the bri dge gel has
not dried ou t. Refresh the brid ge electroly te if necessar y. Following care pro cedure (ignoring t he
cleaning procedures).

Alterna tely, rinse o ff the pro be tip with w ater and con dition the e lectrod e by soakin g the tip (bot tom
4 cm (1.5”)) in pH 7.01 buffer s olution f or sever al minutes . Perform a p robe calib ration be fore usin g.

• Do not be alarme d if white c ryst als appear ar ound the c ap. This is nor mal with p H
electr odes. Rinse o ff the probe t ip with water b efore using.

• Tur n the meter on by p ressing ON/ OFF button.

• R emove the prote ctive cap. DO NOT S CRATCH THE GLA SS. Do not use the pr obe to bore
a hole thro ugh the soil. Mak e sure an entry ho le is made in the soil a nd water has bee n
added. Af ter placing t he probe in the ho le, wait for a sta ble reading.

NEVER IMM ERSE THE ELECTR ODE OVER THE MA XIMUM IMMERSI ON LEVEL.

• For best results, recalibrate periodically.

• A fter use, r inse the elec trode wit h water and sto re it with a few dr ops of storage s olution
in the prot ective cap.

• R eattach th e protectiv e cap after ea ch use.

DO NOT USE DIS TILLED OR DEIONIZ ED WATER FOR STOR AGE PURPOSES.

A

One or Two-Point Calibration with pH 7.01

For one-p oint calibrati on using pH 4.01 buff er go to proced ure B

For one or t wo-point calibr ation using pH 7.01 buffe r go to procedure A

A
B

Open Reference Junction with
removable sleeve design

Suspende d solids c an permane ntly clog t he pores
of a ceramic re ference junctio n. The open junction
design pro vides a con stant junc tion potential and
minimizes b lockage b y providin g an open gel
interf ace betwee n the sample and in ternal Ag/A gCl
referen ce. Should s oil enter into the junc tion, the junction c an be easily cleaned and
refreshed with new bridge electrolyte.

pH Probe

Thank You

Thank you f or choosing a Hanna In struments pro duct. Please re ad this instruc tion
manual care fully before u sing this instru ment.

For techni cal support, con tact your local Han na Instrument s Office or em ail
us at [e-mail].

To find your lo cal Hanna Instr uments Of fice or for add itional info rmation on Hann a
Instruments products, visit www.hannainst.com

Battery
indicator

Unstable
tag

Measurement

unit

Digits

Calibration
tags

"Sto" will b e
displayed when
the calibr ation
is saved.