Wheat and Rice Flour Moisture Tester PR-930
Operating Manual
Thank you for purchasing our Wheat and Rice Flour Mois-
ture Tester, PR-930. This tester can measure the moisture of
our by simple operation, but proper operation is necessary
for accurate moisture measurement.
Please read this operating manual carefully before use.
Table of contents
Contents of Package............................................................................. 3
Part Names ............................................................................................... 4
Description of Display ......................................................................... 5
How to Place Batteries ......................................................................... 7
Before Measurement ............................................................................ 8
Measurement .......................................................................................... 9
Average Value .......................................................................................17
Storage .................................................................................................... 18
Specications ........................................................................................19
Contents of Package
Carrying Case
Operating Manual
Battery holder
Battery (AA sizex4pcs and
under battery holder)
Cleaning brush (2 types)
Spoon with tweezers
Sampling tray
(2 pcs. for grains)
Main unit
Sampling tray
(2 pcs. for ours)
Metal plate (3 pieces)
3
Part Names
Display Handle stop mark
Testing Chamber
Handle
“POWER” button
“SELECT” button
4
“MEA.” button (Measure)
“AVE.” button (Average)
Description of display
This tester adopts the auto power off
function. The power of the tester is
automatically turned o in approx.
5 minutes after turning on the power if
no operation is performed.
Battery Indicator
Selection Indicator
Use of backlight in the display section
allows users to see the display clearly
even in the dark.
Moisture ContentNumber of measurement
5
Description of display
Meanings of special marks The display may show marks as follows:
Normal
Battery mark
Over mark Caution
Under mark
Caution
Caution
Caution
• When measurement is performed with the sampling tray empty or the measuring unit is
poorly insulated due to condensation, high humidity, contamination, etc., the over mark,
under mark, or other meaningless numbers may be displayed. In such a case, clean the
measuring unit and dry it well in a natural way.
6
Battery status is normal.
(displayed immediately after pressing the power switch)
Battery is weak.
(displayed immediately after pressing the power switch)
Battery is dead. Replace the batteries with new ones.
(displayed immediately after pressing the power switch and while using)
Displayed when the measured result exceeded the upper limit of the
measurement range
Displayed when the measured result fell below the lower limit of the
measurement range, or the contact between the test sample tray and
the measuring unit of the main body was poor.
How to Place Batteries
Take out the main unit
1
from the carrying case.
Take out the batteries
2
from under the battery
holder.
Open the battery box
3
on the back side of the
main unit, and place 4
batteries appropriately.
7
How to Place Batteries Before Measurement
Battery replacement
When the battery is running out, the
battery mark lights up at the left side of
the display. Replace all 4 batteries (AA)
with new ones.
Those batteries are gradually discharging
even when the tester is not used.
It is recommended to always use new
batteries.
Place batteries in
the correct polarity
8
Let the tester temperature be the
temperature of the test sample.
PR-930 is equipped with a temperature
compensation circuit. However the
test unit and samples are required
to be thermally stabilized before
measurement.
Measurement
Press the "POWER" button. All of the backlight, all characters on the display section,
1
and marks light up for 2 seconds.
The backlight goes out, and the tester becomes a standby state for measuring.
All display immediately after pressing
the "POWER" button
“Wheat Flour” measuring state
9
Measurement
Scoop wheat flour with the spoon
2
with tweezers and use the grip of the
cleaning brush to level off the rice
our.
10
Put wheat our on the sampling tray
3
and shake the tray slightly to atten
the our.
Measurement
Put the metal plate on the wheat
4 5
flour and press it gently with your
finger. Perform measurement with
the metal disc put on.
Press the "SELECT" button and repeat
until the Selection Indicator and the
abbreviation for name of the product
you wish to test appears.
The selected item is memorized even
after turning o the power.
11
Measurement
When measurement is performed for
6
whole wheat, long or short milled
rice, or paddy use the spoon with
tweezers to scoop the sample on
sampling tray atwise.
12
Evenly in one layer in the sampling
Too ManyInsucient Evenly Placed
in one layer
Measurement
Rotate the handle counterclockwise
7
to let the sampling tray enter the
testing chamber.
evenly in the sampling tray, and insert
it into the testing chamber until the
guide line is hid.
Guide line
Place the sample
Designated position
Note: Failure to observe this may cause the
tip of the handle to damage the plastic
portion of sampling tray. Be sure to
fully insert the tray.
Proper placement Incorrect placement
13
Measurement
Slowly rotate the handle clockwise.
8 9
When the tip of the handle reaches
the sample, fully rotate the handle to
the “handle stop mark” holding the
handle rmly.
Handle stop mark
14
Press the "MEA." button, and the
decimal point blinks, the backlight
lights up, and the moisture content
and measuring number are displayed
thereafter.
Measurement
The backlight goes out after 4
seconds, but the moisture content
remains being displayed. After a
lapse of 5 minutes, the power is
automatically turns off and all the
displayed items are cleared.
Pressing the "POWER" button while
the display is in the on state allows
users to turn o the power manually.
For continuous measurement,
10
perform the next measurement
while the last measured value is
displayed.
Replace the test sample, fully rotate
the handle, and press the "MEA."
button.
The last measured value disappears
and the new measured value is
displayed. The measuring count also
changes at the same time.
15
Measurement
Clean testing chamber inside, sampling tray, and metal plate after every
11
measurement. (Pictures 1, 2, and 3) If the last test sample remains, proper
measurement cannot be performed.
For continuous measurement, disconnect the handle and remove the attached
sample and contamination from the tip of the handle and contact section
sometimes. (Pictures 4 and 5)
1 2 3 4 5
16
Average Value
Pressing the "AVE." button after several
measurements can obtain the average
value of the measured moisture
contents. The average value calculated
from the measured values of the
measuring count 2 to 9 is displayed with
the average characters and number of
measurement times.
Note1: To obtain the average value of
moisture contents, press the "AVE."
button within 5 minutes after
measurement. After the last measured
value disappears, the average
calculation function does not work.
The initial state is restored in the
following states:
• When the power is turned o
• When the "SELECT" button is pressed
• When the "AVE." button is pressed
• When the continuous measurement
count exceeds 9
Note 2: AVE characters are displayed while an
average value is displayed.
17
Storage
Observe the following instructions to
keep moisture tester for a long period
of time:
• Be sure to remove the batteries.
• Clean every portion of the main body
in a careful manner. Especially for the
measuring unit, disconnect the handle
and clean the inner contact section
suciently.
• Be sure to put the tester together with
accessories in the carrying case and
keep them in a cool place avoiding direct
sunlight.
18
Thorough cleaning inside
Specications
Applications /
Measurement range
Measurement
precision
Display format Digital (LCD, minimum display digit 0.1%, backlight equipped)
Operating
temperature range
Temperature
compensation
Power supply 1.5 V (AA battery) x 4 pieces (auto power o function after 5 minutes)
Dimensions and weight
Accessories Sampling tray 4 pieces (2pcs per each of rice our and milled rice), Metal Plate
Wheat our .................11-18%
Wheat ............................. 9-30%
Rice our ........................ 8-18%
Flours : standard error of 0.25%(1σ) at 130C 5g 2hrs method (Entire range)
Grains : standard error of 0.5%(1σ) at 130C 5g crushed 2hrs method (Under 20% range)
* If the measurement is made at a different temperature than 20C, measurement
precision may be larger than stated.
5 – 40 °C
Automatic temperature correction using thermistor
Power consumption : Max. 0.3 W
164 (W) x 94 (D) x 64.5 (H) mm, Approx. 0.44 kg
(3 pcs), Cleaning brush (2types), Spoon with tweezers, Battery (AA size x4pcs),
Battery holder, Carrying case, Operating Manual
Long milled rice ........10-20%
Short milled rice ........ 10-20%
Long paddy ................10-35%
Short paddy ................ 10-30%
19
Notes
Copying some or all of the contents of this user manual without prior written consent is strictly prohibited.
The contents of this user manual may be changed at any time in the future without any prior notice.
The appearance and/or representations of the products and parts depicted in this user manual may not ap-
pear exactly as their actual counterparts, but this does not aect their operation or functionality.
This user manual was intended to be written as clearly and accurately as possible. However, if you are unclear
about anything in this user manual or notice any missing information, please contact us directly.
We cannot be held responsible for any actions or eects resulting from the execution of any operations out-
lined in this user manual.
1404・PA・0101・100_S
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