HI759
Maple Syrup Digital Grader
INSTRUCTION MANUAL
Functional Description
Preliminary Examination
Please e xamine thi s product c arefully. Mak e sure that th e instrume nt is not
damage d. If any damag e occurred d uring ship ment, plea se notif y your Dealer.
Each HI759 m eter is suppli ed complet e with:
• (3) Sampl e cuvette s and caps
• Glycerol reference cuvette
• (3) 20 mL bea kers
• 1.5V AA A batter y
• Instruction manual and quick reference guide
Errors and Warnings
Cover
Cuvette with cap
Cuvette holder
LCD Liqui d Cryst al Display
Operation button
Under Range: A blinking “0 ” indicate s that the sa mple abso rbs
less ligh t than the zer o referenc e.
Over Range: Over Range: A ashing valu e of the max imum
concent ration in dicates th e reading is o ver range. D ilute the
sample a nd re-run th e test.
Invert ed Cuvet te: The glyce rol referen ce cuvett e and sample
have bee n inserte d in the wron g order. Other wise, ch eck if t he
cuvet te has been in serted up side down.
Low Battery: The batt ery is low and m ust be repla ced soon.
Normal o peration o f the instr ument will no t be interr upted.
Dead Battery: The bat tery is dea d and must be re placed.
Once the b attery d isplay is ash ing, norma l operati on of the
instr ument will be i nterrupt ed. Change t he batte ry and res tart
the met er.
Light High: There is too m uch light to pe rform a me asurement .
Please c heck that th e cover is full y closed, an d that the gly cerol
reference cuvette was used properly.
Light Low: There is not en ough light to p erform a
measure ment. Che ck to see if th e light is bloc ked or dirt y.
Do not use a s yrup samp le to calibr ate the mete r.
Thank You
Thank you f or choosin g a Hanna Instr uments pr oduct. P lease read
this inst ructio n manual car efully befo re using the i nstrumen t.
For more in formati on about Han na and our pro ducts,
visit ww w.hannainst.com.
For techn ical suppo rt, cont act your lo cal Hanna oc e or email
us at tech@hannainst.com
Find your l ocal Hanna o ce on www.h annainst .com
Specications
Range 0 to 100% tra nsmitta nce
Resolution 1% transmittance
Accuracy ±4% tra nsmit tanc e
Light Source light emi tting dio de @ 560 nm
Light Detector silicon photocell
Environment 0 to 50°C (32 t o 122°F); RH m ax 95% non-co ndensing
Ba tt er y Typ e (1) 1.5V AA A
Auto-off after ten minutes of non-use
Dimensions 86.0 x 61.0 x 37.5 mm (3.4 x 2.4 x 1 .5”)
Weight 64 g (2.3 oz)
Measurement
Procedure
Turn the meter o n by pressin g the butt on.
All tags w ill be display ed. The disp lay will
show “Add rEF ” with “Pre ss” blinki ng to
indicat e the meter is r eady to calib rate.
Open the c over and inse rt the
sealed glycerol reference cuvette
into the m eter. Close the c over.
Press th e button to c alibrate t he
meter. Thre e lines will bl ink to show
that cal ibration is t aking pla ce.
The displ ay will then sh ow “Add Cu”
with “Pr ess” blink ing when th e meter
has succe ssfully b een calibra ted.
Fill a clean , dry cuve tte with 10 mL o f
maple sy rup sampl e and replace t he cap.
Open the c over and inse rt the cuv ette
into the m eter. Close the c over.
Press th e button to t ake the
measure ment. Thre e lines will b link to
show tha t a measureme nt is taking p lace.
The mete r displays th e percent lig ht
transm ittance o f the maple s yrup. To
take anot her sampl e reading, pr ess
the but ton. To turn o, pres s and hold
the but ton for 3 seco nds. The me ter
automaticallyturns o after 10 minutes.
Recommendations for Users
Before us ing Hanna pr oducts , make sure tha t they are en tirely sui table for yo ur
speci c applicat ion and for th e environm ent in which t hey are use d. Operat ion
of these i nstrume nts may cau se unaccep table inte rferenc es to other el ectroni c
equipme nt, thus re quiring th e operato r to take all ne cessar y steps to cor rect suc h
inter ferences. A ny variat ion intro duced by the u ser to the sup plied equi pment
may degr ade the ins trument ’s EMC perf ormance. To avoi d damages or b urns,
do not put t he instru ment in micr owave oven. F or yours an d the instr ument
safet y do not use or s tore the ins trumen t in hazardo us environm ents.
Code Description
HI759-11
glycero l standar d cuvette s (2 pcs)
HI93703-57
glycero l bottles , 30 mL (4 pcs)
HI731318
cloth for w iping cuve ttes (4 pcs)
HI731359
round gla ss cuvett es with cap s (25)
HI740028
1.5V AA A batter ies (4 pcs)
HI93703-50
cuvette cleaning solution (230 mL)
Accessories
HI759 INSTM AN 1.5 11/ 15
Hanna Ins truments res erves the rig ht to
modify the design, construction, or appearance
of its prod ucts witho ut advance noti ce.
Warranty
HI759 is war ranted for a p eriod of one y ear after d ate of purcha se against
defec ts in workm anship and ma terials wh en used for th eir intende d
purpos e and mainta ined accor ding to instr uction s. This warr anty is limi ted
to repair o r replaceme nt free of cha rge. Damage d ue to acciden ts, misus e,
tamper ing or lack of p rescribe d maintena nce is not cover ed. If ser vice is
require d, contac t your local H anna oce. If un der warra nty, repor t the model
number, date o f purchase , serial num ber and the na ture of the pr oblem. If
the repa ir is not covere d by the warr anty, you will b e notied o f the charge s
incurr ed. If the ins trument is t o be return ed to Hanna Ins trument s, rst
obtain a Re turn Good s Authori zation numb er from the Techn ical Serv ice
depar tment and th en send it wi th shipping c osts prep aid. When shi pping
any inst rument, ma ke sure it is pro perly pac ked for compl ete protec tion.
Battery Management
To conserve b atter y, the instrum ent shuts d own after
10 minutes o f non-use. To repla ce the bat tery, turn th e
instr ument o by hol ding the but ton until t he meter shu ts
o. Turn the instr ument upsi de down and re move the
batte ry cover wi th a screwdr iver. Remove th e batter y from
its loc ation and re place it wit h a new one, ins erting th e
negati ve end rst . Replace the b atter y cover and scr ew.
Tips for an Accurate
Measurement
When tak ing measur ements, th e outside o f the cuvet te
must be dr y and free o f syrup, ng erprint s, oil, or dir t.
Wipe it th oroughly w ith a lint-free cl oth prior to i nsertio n.
Make sure cu vettes a nd syring es are comple tely
dry bef ore using. E xcess water w ill leave st reaks
in the syr up sample w hich may ae ct result s.
Dispens e or pour the s ample slow ly. When trans ferring
the syr up into the cu vette, be c areful not t o generate
bubble s as they may cau se inaccur ate readin gs.
It is impor tant tha t the sampl e is not
turbid a nd does not co ntain debr is.
Grade A Co lor
Classes
Tas te
Percent Light
Transmittance
Grade A Golden Delicate ≥ 75
Grade A Am ber Rich 50 to 74.9
Grade A Dark Robust 25 to 49.9
Grade A Ver y Dark Strong < 25
USDA Standards
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