Omega HFH81 Instruction Sheet

HFH80 SERIES
Fruit Hardness Tester
M5080/0112
INSTRUCTION
SHEET
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Made in Taiwan
FRUITS & VEGETABLES
MULTIPLE DISPLAY UNIT-KG, LB, N & Pa
EASY ZERO ADJUSTMENT.
ACCURACY VERIFICATION
ALL RIGHTS RESERVED
Thank you for your selection of
this Fruit Hardness Tester. To
ensure that you get the most
out of the instrument, we
strongly recommend you read
and follow the instructions in
this manual carefully.
General operation precautions
WARNING
!
Accurate Fruit Testing Requires:
Controlling tip penetration.
Providing a means to verify
gage accuracy.
Controlling the speed of tip
penetration.
1. FEATURES
* The Ripeness Tester is a hand-
held compact penetrometer for
f r u i t f i r m n e s s a n d s o m e
vegetable hardness testing, the
universally accepted measure
of ripeness.
* The HFH80 series is the grower's
indispensable tool for knowing
when to pick and ship.
* The HFH80 Fruit Tester measures
t h e fo r c e r e q uir ed to p ush a
Power off : 2 modes
Manual off at any time
A u t o p o w e r o f f a f t e r 5
m i n u t e s f r o m l a s t k e y
operation
Operating conditions:
Temperature : 0-45℃
Humidity : below 90% RH
Dimensions:
204x62x33mm or
8.0x2.4x1.3 inch
Weight:
230g (not including batteries)
Standard accessories included :
Carrying case ..................1 pc.
Operation manual............ .1 pc.
Optional accessory:
Cable and software for
R S232C and USB
P/N: HFH80-SW
plunger tip of specified size
into the fruit pulp. The force
reading assists in determining
the appropriate picking time or
m o n i t o r i n g f r u i t s o f t e n i n g
during storage.
* Because of the number of fruit
a n d v e g e t a b l e v a r i e t i e s ,
geographical locations and
o t h e r v a r i a t i o n s , t h e
a p p r o p r i a t e f i r m n e s s f o r
harvesting will vary. Therefore
H F H 8 0 u s e r s m u s t c o m b i n e
experience and expertise to
establish the firmness value
that applies to their specific
variety and locale.
* Automatic power off to conserve
power.
* Can communicate with PC for
r e c o r d i n g , p r i n t i n g a n d
a n a l y z i n g b y t h e o p t i o n a l
software and cable for RS232C
interface.
4. FRONT PANEL DESCRIPTIONS
3-1
3-9
3-8
3-2
3-5
3-3
3-6
3-4
3-7
3-1 Display
3-2 Power key (Multifunctional)
3-3 Unit conversion
3-4 Tip selection (HFH80 only)
3-5 Max hold key
3-6 Zero
3-7 Plunger tip
3-8 RS-232C interface
3-9 Battery compartment
2. A GUIDE TO SELECT THE
MODEL
The model of HFH80 Fruit Testers
to chose from 3 models is used
with specific size penetrometer
tips for testing ripeness of
specific fruit.
HFH81
(3.5mm) Small Fruits, Soft Fruits,
HFH83
(7.9mm) Larger Fruits, Firm
Fruits ,Hard Fruits
(11.1mm) Apple, Firm Fruits
Small Fruits: e.g. Strawberry,
Cherry, Grape ,
Berries
Soft Fruits: e.g. Peach, Banana,
A p r i c o t , P l u m ,
M e l o n , C i t r u s ,
Persimmon
Firm Fruits: e.g. Pear, Nectarine, Kiwi
Hard Fruits: e.g. Avocado
5. MEASUREMENT PROCEDURES
Larger Fruits
A. Select an appropriate plunger tip
for the commodity to be tested.
See "A GUIDE TO SELECT
THE MODEL".
B. Select a random sample of 10 to 15
fruits of uniform size and the same
temperature or 3% of the lot to be
sampled. For best results, suggest
one person should test the lot.
C. R e m o v e a d i s c o f s k i n o n
opposite cheeks of the fruit
midway between the stem and
bottom on sun and shade sides.
Then proceed with puncture test.
D. Zero adjustment
Hold the HFH80 vertically with the
plunger tip hanging in the air, the
3. SPECIFICATIONS
Display 4 digits,10 mm LCD
Range:
HFH81
0.2-5.0 kgf/cm
2
Tip size 3.5mm
HFH83
0.2-11.0 kgf/cm Tip size 11.1mm
2
0.4-22.0 kgf/cm Tip size 7.9mm
2
Tip size can be interchanged
after tip size is chosen.
Resolution:
0.01 if reading<10
0.1 if 10<reading<99.9
1 if reading>100
Unit conversion:
kgf (kgf/cm )
2
lbf (lbf/cm )
2
N (N/cm )
2
Pa
Accuracy: ± (1%H+0.1)kgf/cm
2
Power supply: 4x1.5 AAA size
reading on the display should be 0.
If not, depress the 'ZERO' key to
make the HFH80 tester display "0".
E. Hold the fruit against a hard
s u r f a c e a n d f o r c e t h e t i p
vertically into the pulp at a
uniform speed (take about 3
seconds).
F. The tip should consistently
penetrate to the break in tip
diameter or to the scribed line on
some tips.
G. Record reading on the display.
H. If a maximum reading is needed,
just press the key 'MAX' till the
mark 'Max' shows on the display
before taking measurements.
The appearance of mark 'Max' is
controlled by the key 'MAX'.
I. To take the next measurement, just
depress the 'ZERO' key and repeat
steps from E to G.
J. Unit conversion is controlled by
depressing the key 'UNIT'.
K. For the model HFH83, make sure
the plunger tip is in accordance