Kett PRg-930 User manual

Wheat and Rice Flour MoistureTester PRg-930
Operating Manual

2
Thank you for purchasing our Wheat and Rice Flour Moisture Tester,
PRg-930. This tester can measure the moisture of flour and grain by
simple operation, but proper operation is necessary for accurate moisture
measurement. Please read this operating manual carefully before use.
Note: The pictures in this manual are examples and may differ from
actual product.

1
Contents of Package ............................................................................ 2
Part Names .............................................................................................. 3
Description of Display ......................................................................... 4
How to Place Batteries ........................................................................ 6
Before Measurement ........................................................................... 7
Measurement ......................................................................................... 8
Average Value....................................................................................... 17
Storage....................................................................................................18
Specications ....................................................................................... 19
Table of contents

2
Contents of Package
Operating manualCarrying Case
Sampling tray
for grain (2 pcs)
Spoon with
tweezers
Cleaning brush
(2 types)
Battery
(AA size x4 pcs) Inspection Certicate
Sampling tray
for our (2 pcs) Metal plate
(3 pcs)

3
Part Names
“POWER” button
“SELECT” button
“MEA.” button (Measure)
“AVE.” button (Average)
Testing Chamber
Handle
Display Model No. Handle stop red mark
Application table

4
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.
Use of backlight in the display section
allows users to see the display clearly
even in the dark.
Battery Indicator
Moisture Content
Number of measurement
Selection Indicator
Description of Display

5
Meanings of special marks The display may show marks as follows:
Battery mark Caution Battery is dead. Replace the batteries with new ones.
(displayed immediately after pressing the power switch and while using)
Over mark Caution Displayed when the measured result exceeded the upper limit of the
measurement range
Under mark Caution
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.
Error mark
Main unit temperature is too low -5°C or lower.
Main unit temperature is too high 50°C or higher.
• When measurement is performed with the sample 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.
Description of Display

6
123
Take out the main unit
from the carrying case.
Take out the batteries
from under the battery
holder.
Open the battery box
on the back side of the
main unit, and place 4
batteries appropriately.
➡
How to Place Batteries

7
Battery replacement
When the battery is running out, the
battery mark lights up 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
This instrument is equipped with a
temperature compensation circuit.
However the test unit and samples
are required to be thermally stabilized
before measurement.
Before MeasurementHow to Place Batteries

8
<All display immediately after pressing the "POWER" button> <Model number and software version number>
Press the “POWER” button. All of the backlight, all characters on the display section,
mark light up for 2 seconds, and then model number and software version number
is displayed automatically. The backlight goes out, and the tester becomes a
standby state for measuring.
1
Measurement
Ex) Riceter fg501

9
<Ready for measurement>
The backlight turns off and
“Application”, “Times” “%” are
displayed. It is ready for measurement.
Measurement
Press the "SELECT" button and repeat
until the Selection Indicator and the
abbreviation for name of application
you wish to test appears.
The selected application is memorized
even after turning o the power.
2

10
Measurement
Note: The measurement procedure
vories depending on applications.
See 12, page for Wheat, Long
milled rice, Short milled rice, Long
paddy, Short paddy.
Wheat our, Rice our:
Scoop wheat flour with the spoon
with tweezers and use the grip of the
cleaning brush to level off the rice
our.
3-A

11
Measurement
Put wheat our on the sampling tray
and shake the tray slightly to atten
the our.
Put the metal plate on the wheat
flour and press it gently with your
finger. Perform measurement with
the metal disc put on.

12
Measurement
3-B Wheat, Long milled rice, Short milled
rice, Long paddy, Short paddy:
Put the test sample evenly on the
sample tray by just the amount that
will be one layer.
Note:Both the amount of sample is too
much or insufficient may cause a
measurement error. Over more, too
much sample may cause wear on the
screw and damage the instrument.
Note: Sort out unripe or degenerated grains
from the sample tray in order to avoid
error.
Note: Metal plate is not used for whole grains.
Evenly in one layer on the sample tray
Too ManyInsucient Evenly Placed
in one layer
× ×

13
Measurement
Rotate the handle counterclockwise
to let the sample tray enter the
testing chamber. Place the sample
evenly in the sample tray, and insert
it into the testing chamber until the
guide line is hid.
Note: Failure to observe this may cause the
tip of the handle to damage the plastic
portion of the sample tray. Be sure to
fully insert the tray.
Proper placement Incorrect placement
Designated position
Guide line
4

14
Slowly rotate the handle clockwise.
When the tip of the handle reaches
the sample (A), and fully rotate the
handle to the “handle stop red mark”
holding the handle rmly (B).
Press the "MEA." button, the decimal
point blinks, the backlight lights up,
the moisture content and measuring
number are displayed thereafter. The
backlight goes out after 4 seconds,
but the moisture content remains
being displayed.
5 6
Measurement
Handle stop red mark ●
(B) Fully rotating
Handle stop red mark ●
(A) Slowly rotating
(B)
Fully rotating
(A) Slowly rotating
(B)
Fully rotating
(B)
Fully rotating

15
For continuous measurement, 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.
7
Measurement
After a lapse of 5 minutes, the power
is automatically turns o 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.
Note: If the handle is over the red mark after
fully rotating, handle or main unit may
be damaged. Please inspect the unit at
our ocial distributor.

16
Clean testing chamber inside, sampling tray, and metal plate after every
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)
8
Measurement
1 2 3 4 5

17
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.
Average Value

18
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
suciently.
• Be sure to put the tester together with
accessories in the carrying case and keep
them in a cool place avoiding direct
sunlight.
Thorough cleaning inside
Storage