HI981035
Sushi pH Tester
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.
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.
INSTRUCTION MANUAL
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 replaced i n a safe area u sing the b atter y
type spe cified in t his inst ructio n manual . Old batteries should be di sposed in
accordance with local regulations.
Battery Replacement
IST981035 05/18-1
Care and Maintenance
To obtain the hi ghest accurac y for measureme nts it is import ant to follow the se tips:
• Calibrat ion is only as good a s the buff er being used. T he pH buffe r values change o ver
time once t he sachets are op ened. Fresh bu ffer shoul d be used for each c alibration.
• Rinse the p robe in purifie d water afte r use in pH buff ers and betwe en measuremen ts
of samples .
• When the me ter is not in use it is imp ortant to add sev eral drops of stora ge solution
to the prot ective cap to ke ep the probe hydra ted. If storage s olution is not avai lable,
pH 4.01 or pH 7.01 buffer can b e used.
• For improv ed accuracy it is r ecommended t o calibrate in tw o buffers .
• It is import ant to calibrat e and measure s amples at the s ame temperat ure. A dramatic
change in te mperature betw een buffer sol utions and samples t o be tested will give
inaccurate readings.
• If fouled, c lean the electro de by soak ing in clean ing solut ion for 20 minutes, th en
rinse the t ip and soak in stor age solution at le ast 30 minutes be fore use. Recalib rate
after e ach cleaning.
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.
Place meter in calibration mode. Press and hold
ON/OFF until “CLr” is displayed. The meter will
now be at default calibration. No tags will be
shown in measurement mode until calibration is
performed.
Clear Calibration
“Err” Message
Battery Indicator
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.
Auto-off
Electrode Storage Solution
Code Description
HI70300L Electrode storage solution, 500 mL bottle
HI70300M Electrode storage solution, 230 mL bottle
HI9072 Electrode storage solution, 13 mL dropper
Electrode Cleaning Solution
Code Description
HI700601P General p urpose cleanin g solution, 20 mL sa chets (25 pcs.)
HI70 0641P
Cleaning an d disinfecti on solution for d airy product s,
20 mL sachet s (25 pcs.)
pH Buffer Solution
Code Description
HI70004P pH 4.01 buffer solu tion, 20 mL sachet s (25 pcs.)
HI70007P pH 7.01 buff er solution, 20 mL s achets (25 pcs .)
HI7 7400P pH 4.01 & 7.01 buffer solut ion, 20 mL sachet s (10 pcs., 5 ea.)
Accessories
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 HI700641 cleaning
solution for 20 minutes. Rinse with purified water
and place in storage solution for a minimum of
30 minutes before calibrating.
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
Flat Glass Tip
A flat tip optimizes surface contact for measurement on flat
sushi, and samples that cannot penetrated.
Open Junction Reference
The open junction design uses a solid gel interface between
the sample and internal reference cell. This interface prevents
silver from exiting the junction, but also makes it impermeable to clogging, resulting in
a fast response and stable reading. Due to this design, the meter can be used for smaller
sample sizes as there is no junction to submerge.
Open Junction
pH Sensit ive Glass
If pH 4.01 buffer
solution is used
as the first point
the value of the
buffer is recognized
and displayed
with the blinking
stability indicator.
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.
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
When the
reading is s table,
the stab ility
indicator will
disappe ar.“Sto”
will be disp layed
when the
calibration
is saved.
Meter wil l
exit to
measurement
mode and th e
calibration
tag will be
displayed.
Meter will exit
to measurement
mode and the
calibration
tag will be
displayed.
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.
Thank You
Thank you f or choosing a Han na Instrumen ts product. P lease read th is instruct ion
manual care fully before u sing this instru ment.
For techni cal suppor t, contac t your loc al Hanna Inst rument s Off ice or
email us at tech@hannainst.com.
To find your lo cal Hanna Ins trument s Off ice or for additional informat ion on
Hanna Instruments products, visit www.hannainst.com
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 7.01 or
4.01 buffer solution.
One-Point
One-Point Calibration with pH 4.01
B
A
One or Two-Point Calibration with pH 7.01
pH 4.01 will then
blink on the display.
Ignore it an d press
ON/OFF bu tton.
Operation
Press the ON/OFF button to turn the meter on. All tags
will be displayed.
The meter will go into measurement mode: current
reading and calibrated buffers are displayed.
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 Approxi mately 1000 hour s of continuous us e
Auto-off 8 minutes, 6 0 minutes or can be di sabled
Environment 0 to 50 °C (32 to 122 °F); R H 95% max
Dimensions 51 x 160 x 21 mm (2 x 6.3 x 0.9“)
Weight 52 g (1.8 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 and di sinfection s olution for dair y products (2 p cs.)
• Electrode storage solution, 13 mL dropper
• Instruction manual
• Quality certificate
Note: Save all p acking material u ntil you are sure that t he instrument fun ctions
correctl y. All defective item s must be returned i n the original pa ckaging with the
supplied accessories.
Meter Overview
Preparation:
The pH elec trode is s hipped wi th a protec tive cap c ontainin g storage s olutio n. Before
using the meter, remove the protective cap and condition the elec trode by soaking t he
tip (bot tom 1 cm (0.4”)) in pH 7.01 buffe r soluti on for sev eral minut es. Then f ollow the
calibration procedure.
• Do not b e alarmed if white c rystals appe ar around the cap. Th is is normal with pH
electr odes and they dis solve when rin sed with wate r.
• Turn the m eter on by press ing ON/OFF but ton.
• Remov e the protec tive cap and pl ace the flat t ip of the elec trode full y on the sample
to be tested.
NEVER IMMER SE THE ELECTROD E OVER THE MAXIM UM IMMERSION LEV EL.
• For best results, recalibrate periodically.
• Af ter use, rinse the el ectrode with wa ter and store it with a f ew drops of storage
solutio n in the protect ive cap.
• Reat tach the prote ctive cap af ter each use.
DO NOT USE DIST ILLED OR DEIONIZED WATER F OR STORAGE PUR POSES.
Liquid Cr ystal
Display
ON/OFF
Button
Maximum
Immersio n
Level
Recommen ded full
touch surface
pH Probe
Intended use
Sushi rice n eeds to be k ept warm (about 32 °C) fo r best res ults whe n rolling su shi.
However, th is can create f ood safet y risks caus ing health dep artments t o crack down on
practic es around the handli ng of sushi rice, whic h is often held fo r up to several hour s
in the temperature "danger zone".
In the sushi p rocess, pH monit oring is considere d to be essentia l and a number of our
custome rs are required t o maintain a record o f hold times and pH le vels.
Most munic ipalitie s require t hat sushi r ice is mainta ined belo w a pH of 4.6. The
procedur es around this standa rd can vary from a full H azard Analysis Critical Control
Points (HA CCP) plan for sush i to health depar tment test ing. Fortunat ely, the pH can be
controll ed with rice vin egar, a tradition al ingredient use d in sushi rice.
Probe Features
Low Temperature Glass Formulation
Low temperature (LT) glass ensures fast stabilization and more accurate results at lower
temperatures. This is beneficial since many food products are stored at low temperatures.
Calibration
tags
Battery
indicator
Unstable
tag
Measurement
unit
Digits
"Sto" will b e
displayed when
the calibr ation
is saved.
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