Omega HFH81, HFH83 Instruction Sheet
Th an k you for your se le ct io n of
th is Fr ui t H ar dn es s Tes ter. To
en su re th at yo u g et t he mo st
ou t of t he i ns tr um en t, we
st ro ng ly re co mm en d you r ea d
an d fo ll ow th e i ns tr uc ti on s i n
th is m anua l car ef ul ly.
ALL RIG HTS RES ERVED
!
*
hel d co mpact pen etr omete r fo r
f ru i t f ir m n es s a nd s o m e
veg etabl e ha rdnes s te sti ng , the
uni versa lly a ccept ed me asure
of ri penes s.
* The HFH80 series is the gro wer’s
ind ispen sable tool for k no win g
whe n to pick a nd ship .
* The HFH80 Fruit Tester m easures
th e f orc e r equ ir ed t o p ush a
The Ripe ness Teste r is a hand -
FRU ITS & VEG ETABLE S
MULT IPLE DI SPLAY UNI T-KG, LB , N & P
a
EAS Y ZERO ADJ USTME NT.
ACC URACY V ERIFI CATION
Acc urate F ruit Test in g Req ui res :
Con troll ing tip p enetr ation.
Pro vidin g a me an s to v eri fy
gag e accur acy.
Co ntr ol lin g th e sp ee d of t ip
pen etrat ion.
1. FEATU RE S
Gen eral op erati on prec autio ns
WARN ING
2. A GU IDE TO S ELECT TH E
MODEL
The model of HFH80 Fruit Te sters
to cho se fro m 3 m odels is use d
wit h spe cific si ze pe net ro met er
ti ps f or t esti ng r ipen ess o f
spe cific f ruit.
HFH81
(3.5mm) Small Fruits, Soft Fruits,
HFH83
(7. 9mm) Larger F ruits , Firm
Fruit s ,Hard Fruit s
(11.1m m) Apple , Fi rm Fr ui ts
Sma ll F ruits : e. g. S tra wb err y,
Che rry, Gra pe ,
Ber ries
Sof t Fru its: e.g. Peach, Ban an a,
A p r ic ot , P l um ,
M e l o n , C i t r u s ,
Per sim
mon
Firm Fruits: e.g. Pear, Nectarine, Kiwi
Har d Fruit s: e.g. Avo cad o
Dis play 4 di gits, 10 mm LCD
Ran ge:
HFH81
2
0.2 -5.0 kg f/cm
Tip s ize 3 .5 mm
HFH83
2
0.2-11.0 kgf/cm Tip size 11.1mm
2
0.4-22.0 kgf/cm Tip size 7.9mm
Tip s iz e ca n be int ercha ng ed
aft er tip si ze is cho sen.
Res oluti on:
0.0 1 if read ing<1 0
0.1 i f 10<re ading <99.9
1 if re ading >100
Uni t conve rsion :
2
kgf ( kgf/c m )
2
lbf ( lbf/c m )
2
N (N/ cm )
Pa
2
Acc uracy : ± (1%H+ 0.1)k gf/cm
Pow er supp ly: 4x1 .5 AA A size
3. SPEC IF IC ATIO NS
3-1 D ispla y
3-8 R S-232 C inter face
3-9 B atter y compa rtmen t
3-2 P ower ke y (Mult ifunc tiona l)
3-3 U nit con versi on
3-4 Ti p selec tion (HFH80 only)
3-5 M ax hold k ey
3-6 Z ero
3-7 P lunge r tip
readi ng on the display should be 0.
If not, depre ss the 'ZERO' key to
make the HFH80 tester display “0”.
E. Hold t he f rui t ag ainst a h ard
s u rf ac e a nd f or c e t he t ip
ve rt ic al ly i nt o t he p ulp a t a
un if or m speed ( ta ke ab ou t 3
sec onds) .
F. T he ti p s hou ld c on sis ten tl y
penet rate t o th e br eak in t ip
dia meter or t o th e scrib ed l ine on
som e tips.
G. Re co
rd re ading o n the dis play.
H. If a m aximu m readi ng is nee ded,
jus t press t he key 'M AX' til l the
mar k 'Max' s hows on t he disp lay
bef ore tak ing mea surem ents.
The a ppear ance of m ark 'Ma x' is
con troll ed by the k ey 'MAX '.
I. To take the next measurement , just
depre ss the 'ZERO' key and rep eat
steps fro m E to G.
J. Un it conv ersio n is cont rolle d by
dep ressi ng the ke y 'UNIT '.
K. F
or the model HFH83, make sure
th e pl unge r tip i s in ac co rd an ce
5. MEAS UR EM EN T PROCE DU RE S
Large r Fr ui ts
A. Sele ct a n app ropri ate plung er t ip
for th e comm odity to be tes ted .
See “A GU ID E TO S ELE CT
THE M ODEL” .
B. Select a random sample of 10 to 15
fruit s of unifo rm size and the same
tempe ratur e or 3% o f the lot to b e
sampl ed. For best results, suggest
one perso n should test the lot .
C. R
e mo ve a di sc o f s ki n o n
op po sit e c he eks of th e f ru it
mid way b et wee n the s tem a nd
botto m on sun a nd sh ade s ides.
Then proc eed wi th punc ture te st.
D. Ze ro adju stmen t
Hold the HFH80 vertically with the
plu nger ti p hangi ng in the a ir, the
plu nger tip of spec ified si ze
int o the f ru it p ul p. T he fo
rce
rea ding as si sts i n de ter minin g
the appr opria te pi cki ng time or
mon it or i n g f ru it s of te ni ng
dur ing sto rage.
* Becau se of the nu mbe r of fr uit
a nd v e ge t ab l e v a r ie t ie s ,
ge og ra ph ica l lo ca ti on s a nd
o t h e r v a r i a t i o n s , t h e
a pp r o pr i a t e f i r m ne s s f or
har vesti ng wi ll va ry. T heref ore
H
FH80 u se rs mus t co mb i n e
ex pe ri ence an d e xp er tise to
es tabli sh the fi rm ne ss v al ue
tha t a pplie s t o thei r s pec ific
var iety an d local e.
* Aut oma tic pow er off to con ser ve
power.
* Ca n co mmu ni ca te w ith PC for
r e c o r d i n g , p r i n t i n g a n d
a n al yz in g b y t h e o p ti on al
sof tware and cab le fo r RS2 32C
int erfac e.
Pow er off : 2 mo des
Man ual off a t any tim e
A u to p ow er o ff a ft e r 5
m in ut e s f ro m l a st k ey
ope ratio n
Ope ratin g condi tions :
Temp eratu re : 0-45℃
Hum idity : b elow 90 % RH
Dim ensio ns:
204 x62x3 3mm or
8.0 x2.4x 1.3 inc h
Weig ht:
230g (not including batteries)
Stand ard acces sories included :
Carrying case ………………1 pc.
Operation manual………… .1 pc.
Opt ional a ccess ory:
Cab le and so ftwar e for
R
P/N: HFH80-SW
S23 2C and US B
4. FRONT PANEL DESCRIPTIONS
3-5
3-4
3-3
3-2
3-6
3-8
3-1
3-7
3-9
HFH80 SERIES
Fruit Hardness Tester
M5080/0112
Shop online at: omega.com e-mail: info@omega.com
Made in Taiwan
For latest product manuals: omegamanual.info
INSTRUCTION
SHEET
App ly a fo rce N to t he ti p.
Whe n r ea din gs a r e a lm os t
u n c h a n ge d, p r e ss t h e k e y
'MA X' t o ho ld t he r eadin g P
w h ic h s h o u ld s at i s fy t he
equ ation b elow.
P=k× N
e. g. if applying 0.4 kgf to HFH81,
the reading should be
0.4 10. 399=4 .16
Max . devia tion is
±(4 .16*1 %+ 0.1 )= ±0. 14
so co rrect r eadin g shoul d lie in
×
7. MAIN TE NA NC E
A. Befo re dail y us e, exer cis e th e
pl unger in and ou t for 1 0
s e co n d s t o e n s ur e t h e
mec hanis m funct ions fr eely.
B. Af ter d ai ly u se, c le an t he
pen etrom eter ti ps . Car ef ull y
hol d the te ste r wi th t he load
sha ft point ing do wn under a
slo wly fl owi ng w at er fauc et
for a few seco nds, dry with a
tow el an d a ll ow to dr y f urt her
by s tan din g it w i th s ha ft
poi nting d own.
C. The HFH80 test er sh ould never
be l ubr icate d wi th o il s in ce
th is wi ll a cc umu la te d ust
cau sing inc rease d fri cti on an d
dec rease
d acc uracy.
Mod el
Tip
Coe ffici ent
HFH81
HFH83
3.5 mm
7.9 mm
11.1 mm
k=1 0.399
k=2 .041
k=1 .053
wit h the ti p size on the d ispla y. If
not , pres s t he k ey '7.9/ 11. 1' t o
cho ose.
Small er F ru its
Similar to large fruit testing except:
A. Ma ke a pun ct ure test on o nly
one ch eek midwa y be tw een
the s tem and t he bott om.
B. R em o v a l o f t h e s k in i s
unn ecess ary.
C. P e n e t r a t i o n s h o u l d b e
suf fi c ie nt t o o bt a in p ea k
rea ding. Repe ti tiv e tes ting is
a pe rf ect te sti ng tec hn iqu e for
sma ll frui ts.
6. BATTE RY RE PLACE ME NT
A. Wh en the ba ttery s ym bol
app ears on t he disp lay, it is
tim e to repl ace the b atter ies.
B. Sl ide the B atter y Cover a way
fro m the tes ter and r emove t he
bat terie s.
C. In stall b atter ies pay ing
car eful at tenti on to pol arity.
!
WARNING
PART 8 AND 9 ARE ONLY FOR
SKILLED AND PROFESSIONAL
PERSONNEL ONLY.
Users ar e not su gg es ted to try
to carr y ou t th e op eration s in
part 8 a nd pa rt 9. Im pr op er
ope rat ion w ill lead to th e HFH80
teste r i na ccura te , even co ul d
not wor k.
8.HOW TO SET THE TIM E OF
AUTO PO WE R OFF
The defau lt s ettin g for a uto power
off at the facto ry is 5 mi nut es.
Tha t mea ns th e t ester will au to
pow er off 5 minut es f ro m th e ti me
of last k ey o perat ion. Us ers can
cha nge i t t o any valu e b et wee n 09 mi nu te s by follo wing ste ps.
Dep r
ess th e POW ER for ab ou t 4
sec onds, re lease it after "O FF"
sho ws on disp lay, then pres s the
key ' MA X' to p res et the ti me as
des ired. To disa bl e the f un cti on o f
aut o powe r o ff, just p reset th e
tim e t o 0. the tes ter will only be
shu t d ow n m anual ly in su ch a
cas e.To q uit the tim e set ti ng, jus t
pre ss the ke y ZERO.
9.ACC UR AC Y VER IF IC ATIO N
P
ri or to u se, t he HF H80 t est er
acc uracy sh oul d be ve rif ie d by
tes ting wi th weig hts.
HFH80 a ccuracy can be eas ily
verified by the following formula.
P=N /S
Her e P is HFH80 reading
N is th e force a pplie d to the
plu nger ti p
S is th e area on w hich th e
for
ce is a pplie d.
Bas ed on the a bove fo rmula ,
coe ffici ents ar e given f or
dif feren t model s be low.
=4. 02-4. 30kgf
But if appl ying 11.0 kg f to
HFH83 (7.9mm) the reading
sho uld be
11x2.0 41 =22 .4 5
Max . devia tion is
±(2 2.45* 1% +0. 1) =±0 .32
so co rrect r eadin g shoul d lie in
22. 45±0. 32
=22 .13-2 2.77k gf
If th e dev iatio n is be yond it s
acc uracy, D epres s Power k ey
an d no t r el ea se i t t il l 'C O'
app ears o n the D is pla y. I t ta ke s
abo ut 6 seco nds fro m sta rting
depre ss in g Po we r ke y. Th en
adj ust the r ea din g P b y the
'MA X' key ( incre as
e) o r 'UNIT '
key ( dec rease ) to the d esi re d
val ue. s tor e that val ue and qui t
by pr essin g Zero ke y.
A. Inst al l t he opti onal RS 232 C
sof tware t o the PC.
10. COM MU NI CATE W IT H PC
B. Conn ect th e tes ter to th e C OM
or USB port of th e P C w ith the
op tio nal R S2 32 c abl es. To
con nect to a USB p ort , a USB
ada ptor is r equir ed.
C. Run the sof tware on the desk to p
and se lect t he C OM por t or
U SB p or t i n t he s ys t em
set tings .
D . Clic k t he b ut to n o f d a t a
coll ec ti on , th en c li c k t he
but ton of Be gin/C ontin ue.
WARRANTY/DISCLAIMER
OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials
and workmanship for a period of 13 months from date of purchase. OMEGA’s
WARRANTY adds an additional one (1) month grace period to the normal one
(1) year product warranty to cover handling and shipping time. This ensures
that OMEGA’s customers receive maximum coverage on each product.
If the unit m alfuncti ons, it mus t be retur ned t o the facto ry fo r eva luation.
OMEGA’s Customer Service Department will issue an Authorized Return (AR)
number immediat ely upo n phone or written request. Upon examination by
OMEGA, if the unit is found to be defective, it will be repaired or replaced at
no
ch
arge. OMEGA’s WARRANTY does not apply to defe cts result ing from any
action of t he purcha ser, inc luding bu t not limited to mi shandling, improper
interfacing, operation outside of design limits, improper repair, or unauthorized
modification. This WARRANTY i s VOID if the unit shows evide nce of having
been tampered with or shows evidence of having been damaged as a result of
excessive corrosion; or current, heat, moisture or vibration; improper specification; misapplication; misuse or other operating conditions outside of OMEGA’s
control. Components in which wear is not warranted, include but are not limited
to contact points, fuses, and triacs.
OMEGA is pleased to offer suggestions on the use of its various products.
However, OMEGA neither assumes responsibility for any omissions or errors
nor assumes liability for any damages that result from the use of its
products in accordance with information provided by OMEGA, either verbal
or written. OMEGA warrants only that the parts manufactured by the
compamy will be as specified and free of defects. OMEGA MAKES NO
OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER,
EXPRESSED OR IMPLIED, EXCEPT THAT OF TITLE, AND ALL IMPLIED
WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE HERE BY DISCLAI MED.
LIMITATION OF LIABILITY: The remedies of purchaser set forth herein are
exclusive, and the total liability of OMEGA with respect to this order,
whether based on contract, warranty, negligence, indemnification, strict
liability or otherwise, shall not exceed the purchase price of the component
upon which l iability is based. In no ev ent shal l OMEGA be liable for
consequential, incidental or special damages.
CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it
be used: (1) as a “Basic Component” under 10 CFR 21 (NRC), used in or with any
nuclear installation or activity; or (2) in medical applications or used on humans.
Should any Product(s) be used in or with any nucle ar installation or ac tivity,
medical application, used on humans, or misused in any way, OMEGA assumes
no responsibility as set forth in our basic WARRANTY / DISCLAIMER language,
and, additionally, purchaser will indemnify OMEGA and hold OMEGA harmless
from any liability or damage whatsoever arising out of the use of the Product(s) in
sucha manner.
RETURN REQUESTS / INQUIRIES
Direc t all warr anty and repair reques ts/inqui ries to th e OM EGA C ustomer
Servi ce D epartmen t. BE FORE RETURNI NG AN Y PR ODUCT(S) TO OMEGA ,
PURCHASER MUST OBTAIN AN AUTHORIZED RETURN (AR) NUMBER FROM
OM EGA’ S CUS TOME R SER VICE D EPA RTM ENT (I N ORDE R TO AV OID
PROCESSING DELAYS). The assigned AR number should then be ma rked on
the outside of the return package and on any correspondence.
The purchaser is responsible for shipping charges, freight, insurance and proper
packaging to prevent breakage in transit.
FOR WARRANTY
RETURNS, please
have the following information
available BEFORE contacting OMEGA:
1. Purchase Order number under
which the product was
PURCHASED,
2. Model and serial number of the
product under warranty, and
3. Repair instructions and/or specific
problems relative to the product.
FOR NON-WARRANTY REPAIRS,
consult OMEGA for current repair
charges. Have the following information
available BEFORE contacting OMEGA:
1. Purchase Order number to cover the
COST of the repair,
2. Model and serial number of the
product, and
3. Repair instructions and/or specific
problems relative to the product.
OMEGA’s policy is to make running changes, not model changes, whenever an
improvement is possible. This affords our customers the latest in technology
and engineering.
OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 2012 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied, reproduced, translated, or reduced to any
electronic medium or machine-readable form, in whole or in part, without the
prior written consent of OMEGA ENGINEERING, INC.
It is the policy of OMEGA Engineering, Inc. to comply with all worldwide
safety and EMC/EMI regulations that apply. OMEGA is constantly pursuing
certification of its products to the European New Approach Directives.
OMEGA will add the CE mark to every appropriate device upon certification.
The information contained in this document is believed to be correct, but
OMEGA accepts no liability for any errors it contains, and reserves the right
to alter specifications without notice.
WARNING: These products are not designed for use in, and should not be
used for, human applications.
4.1 6±0.1 4
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