Kett AN-900 User manual

Near Infrared Grain Tester AN-900
Ver.1.08
Operating Manual

Contents
1. Features ................................................................................................ 4
2. Main unit & Parts names........................................................................ 5
3. Specifications......................................................................................... 7
4. Keypad (Explanation)............................................................................. 8
5. Preparation............................................................................................. 9
5-11.Power ON ............................................................................................ 9
5-21. Calibration Selection............................................................................ 10
6. Measuring Procedure............................................................................. 11
6-11.Measurement....................................................................................... 11
6-21.Average Display .................................................................................. 14
6-3-1. Setup the Display Conditions .............................................................. 15
6-3-2. Setup the Indication Range ................................................................. 16
(1) Protein CM Display ........................................................................ 17
6-41.Bias Adjustment................................................................................... 17
(1) Manual adjustment mode............................................................... 18
(2) Automatic adjustment mode........................................................... 20
7. Time settings.......................................................................................... 23
8. Communication ...................................................................................... 24
9. Cleaning ................................................................................................ 25
<Appendix> Guidelines for using AN-900 with maximum accuracy ............... 26

4
1. Features
The Model AN-900 compostion analyzer is a compact-size grain
tester (Transmittance type) that utilizes applied near-infrared rice
analysis technology.
It employs total-grain measurement formulas for measuring with-
out crushing the sample grain to pieces, so it makes it possible to
analyze grain quickly and easily.
By ultilizing halogen lamp, grating system and NMOS photo-di-
ode array detector, and the result is that we are able to achieve
high stability.

5
2. Main unit & Parts names
Cover
Contrast adjustment control
Display
Key functions
Cover
Printer output port
Serial output port(RS-232C)
Power cable connection
Power switch
Fuse holder
Measurement chamber
< Rear side >
< Front side >

6
[ Accessories ]
Sample case
Power cable
Sampling cup Fuse
Operating manual
Operating Manual
Near Infrared Grain Tester AN-900
Standard samples Strage case for standard sample
Standard sample
Strage case

7
3. Specifications
Measurement Method : Near Infrared Transmittance
Light Source : Halogen Lamp (lamp life 2000hrs)
Applications : Wheat
Constituents : Protein, Moisture
Sample Volume : Approx. 60mL
Calibration Memory : 4 constituents×8 channels
Measurement Time : Approx. 40 sec
Operating Emvironment : 10~35℃(Non-condensation)
Display Format : 320×240 dot-matrix large-size LCD
Displays Content : Calibration settings / names, Protein, Moisture
Power Source : AC100V~240V (50/60Hz)
Dimentions : 435(W)×315(D)×195(H)mm
Weight : 11.5kg
Accessories : Power cable 1pc
Sample case 1pc
Sampling cup 1pc
Fuse 1pc
Operation manual 1pc
Standard samples
Strage case for standard sample 1pc
Option : Printer model VZ-330 (100V/220V)
Note :AN-900 should be used below 35℃in environment condition. If the enviornment temperature is
over 50℃, the precision spectroscope would be damaged. AndThe AN-900 should be also straged
below 50℃enviornment condition.
Note :Pre-calibration with recommended conditions are as below.
Display range Protein : 7 ~ 15%
Moisture : 7 ~ 18%
Recommnedation conditions : 15~30℃(Non-condensation)
Note :A backup battery has been built to this unit so that even if the electricity is cut-off, the calibra-
tion in memory will not be lost. Please contact the service desk of our company regarding an
replace of backup battery.

8
Scroll key
Function key
Execute key
Rtn key
4. Keypad Explanation
RTN EXECUTE
Execute key : Press this key when you begin measuring or you want to execute or confirm a
selected item.
Rtn key : Press this key when you want to return to a previous screen or when you want
to invalidate a selected item.
Scroll key : Press this key when you are selecting an item at the top of the screen or when
you want to increase or decrease a numerical value.
Function key : Press this key when you will use a function that was specially set-up at the top
of the screen.

9
5. Preparation
5-1. Power On
Operation Display Explanation
1. Plug the power cable into this unit
and connect it to outlet.
2. Turn the power switch “ON”, which
is located rear side.
Initial screen will be displayed.
Power cable Outlet
Power Connector
Power switch
Ground
Note :Approximately one hour before operation, turn the power “On”, and begin warming up the de-
vice.
In case that the screen isn’t show-
ing or is hard too see, adjust the
“Contrast set dial” on the bottom
of unit by turning it until thr screen
is easy to see.
[ ] means, turn [ON]
[] means, turn [OFF]
［Measurement ］
［ Application ］ 1 Wheat
［Display ］
［Adjustment ］ Serialnumber
［Time ］ AB01234
［Communication ］ VER 1 .08
2006−08−31 13: 59

10
5-2. Calibration Selection
With near-infrared composition analyzers similar to this unit, you prepare each pre-
calibration and then analysis compositions. AN-900 has an eight channel capacities
and pre-calibrations is done by our company. Before starting analysis, please select a
proper calibration according to the grain you want to measure.
Operation Display Explanation
1. By using keys, select
the “Calibration” setting.
2. Press the key.
The list of pre-calibration is dis-
played.
3. Select a calibration by using
keys.
4. Press the key.
Calibration will be selected and
back to initinal screen.
The existing, selected Calibration is
diplayed.
Note :A backup battery has been built to this unit so that even if the electricity is cut-off, the calibra-
tion in memory will not be lost. Please contact the service desk of our company regarding an
replace of backup battery.
［Measurement ］
［ Application ］ 1 Wheat
［Display ］
［Adjustment ］ Serialnumber
［Time ］ AB01234
［Communication ］ VER 1 .08
2006−08−31 13: 59
［Application］
1 Wheat
2
3
4
5
6
7
8
Selecttheapplication.
［Application］
1 Wheat
2
3
4
5
6
7
8
Selecttheapplication.
［Measurement ］
［ Application ］ 1 Wheat
［Display ］
［Adjustment ］ Serialnumber
［Time ］ AB01234
［Communication ］ VER 1 .08
2006−08−31 13: 59

11
6. Measuring Procedure
6-1. Measuring
Operation Display Explanation
1. By using keys, select
the “Measurement” setting.
2. Press the key.
3. After making sure that cover is
closed completely, and press the
key.
Never open the cover during Measure-
ment.
［Measurement］Application1Wheat
Measurementinprogress...
Standardmeasurement
［Measurement ］
［ Application ］ 1 Wheat
［Display ］
［Adjustment ］ Serialnumber
［Time ］ AB01234
［Communication ］ VER 1 .08
2006−08−31 13: 59
［Measurement］Application1Wheat
Removethesample
andsurelyclosethehood.
PresstheEXECUTE
Standardmeasurement
［Measurement］Application1Wheat
Setthesample
andsurelyclosethehood.
PresstheEXECUTE
Surfacemeasurement

12
Operation Display Explanation
4. Set the sample case and close
the cover, and press the key.
The screen display will show “Sur-
face Meaasurement”but it doesn’t
matter which side you measure
first.
5. Take the sample case and turn
over it. And set the sample case
and close the cover, and press the
key again.
Pouring the sample into
the sample case.
Strongly tap the bottom
of the sample case
approx. 10 times in or-
der to make the sample settle firmly.
Add additional sample, if thre is empty
space at the top.
Never open the cover during Measure-
ment.
Never open the cover during Measure-
ment.
Remove the sample case after mea-
suring compositions.
Press the key, if you want to
measure next sample continiously.
If press the
RTN
key, initial screen will
be displayed.
［Measurement］Application1Wheat
Measurementinprogress...
Surfacemeasurement
［Measurement］Application1 Wheat
Measurementinprogress...
Thereversemeasurement
［Measurement］Application1Wheat
Turnoverthesample
andsurelyclosethehood.
PresstheEXECUTE
Thereversemeasurement
［Measurement］Application1Wheat
Numberofmeasurementtimes = 1
Protein 6 . 0 ％
Protein CM ＠1 5 .0 5 . 9 ％
Protein DM 7 . 0 ％
Moisture 1 4 . 0 ％
FDisplaytheaverage.

13
Note :During and /or measurement, there are times when the following messages will be displayed.
In whichever case except Error 09, press
RTN
key, and redo the measurement from the very
beginning. This message appears when a prescribed operation hasn't oc-
curred within 20 seconds after the operation function has come
up at the top of the screen. (When you don't perform a function
for 10 seconds, a buzzer will sound. In addition, not doing any-
thing for 10 seconds will cause this message to be displayed and
the measurement will be halted.)
This message appears when light is leaking from the chamber
during measurement.
This message appears when the penetration rate of light from
the sample is either greater or less than the permissible range.
This message appearts when the temperature of the operating
environment is either higher or lower than the permissible range.
This message appears when the temperature of the sample is
either higher or lower than the permissible range.
This message appears when the temperature in Spectrophotom-
eter is over 45℃and the power is forcibly turned off.In this case,
the instrument should be cooled down by leaving it under airy
place until it reached to the ambient temperature. The power
should be on after confirming that the instrument temperature is
cooled down to the ambient temperature.
Error 01:
Startoverthemeasurement
again.
Error 02:
Filterwheelwrong.
Error 03:
（04）
Sampletoobright.
（dark）
Error 05:
（06）
Instrumenttemp.toohigh.
（low）
Error 07:
（08）
Sampletemp.toohigh.
（low）
Error 09:
Instrumenttemp.toohigh.
Cooltheinstrumentdown
toambienttemp.

14
Note :AN-900 utilizes a transmittance measurement method, empty space in the sample cases will
lead to measurement errors. It is important into the sample case firmly in such a way that there
are no empty spaces.
Note :A temperature sensing element is inserted into an opening in the bottom of the sample case in
order to measure the temperature of the sample and perform temeprature compensation. How-
ever, in order to obtain the most precise measurement results, it is best if different temperarure
between the sample and the environment in which the unit is installed are kept to a minimum.
Note :AN-900 should be used below 35℃in enviroment condition in order to equip precision spectro-
scope which would be damaged in high enviroment condition.
++.+ : Over the upper limited of
Display range.
--.- :Under the lower limited of
Display range.
** :When the caliculation is
not available.
6-2. Average Display
Operation Display Explanation
1. When performing repeated mea-
surements the number of times
measured increase. (1~9)
2. Press the key, the average
value based on those repeated
measurements will be displayed.
Following the 9th measurement, the
counter will automatically reset and
start over at 1.In addition, at the times
when you press the
RTN
key or
keys, the next measurement will be-
come the first.
On this screen, if the key is
pressed, a new measurement can be
performed.When the average value is
displayed, the counter resets and the
next measurement becomes the first
one. If the
RTN
key is pressed, the
initial screen will be displayed.
［Measurement］Application1Wheat
AverageNumberofmeasurementtimes =1
Protein 6 . 2 ％
Protein CM ＠1 5 .0 6 . 1 ％
Protein DM 7 . 2 ％
Moisture 1 4 . 1 ％
Displayingtheaverage.
［Measurement］Application1Wheat
Numberofmeasurementtimes = 1
Protein ++. + ％
Protein CM ＠1 5 .0 **.*％
Protein DM **.*％
Moisture 1 1 . 9 ％
FDisplaytheaverage.
［Measurement］Application1Wheat
Numberofmeasurementtimes = 1
Protein 6 . 3 ％
Protein CM ＠1 5 .0 6 . 3 ％
Protein DM 7 . 3 ％
Moisture 1 4 . 2 ％
FDisplaytheaverage.

15
6-3-1. Setup the Dislay Conditions
Operation Display Explanation
1. By using keys, select
the “Display” setting.
2. Press the key. And select a
item you want to change by using
keys.
3. Press the key, and select ei-
ther the“Display”or “Don’t Display”
choice for each item by using
keys.
4. Press the key.
In addition to the protein CM ON,
pressing key will allow you
to set the “@ moisture %” for cal-
culating the protein CM by using
key. And press the
key.
CM(Constant Moisture basis)
DM(Dry Moisture basis)
In case “Display” is ON.
In case “Display” is OFF.
If you want to set another choices, re-
peat operation procedure 2~4.
If you press the
RTN
key, the initial
screen will be displayed.
“@ Moisture %” is changeable.
While you press the key, you can
increase and decrease the values
quickly with keys.
［Display］Application1Wheat
Protein O N
Protein CM O N ＠ Moisture 1 5 . 0 ％
Protein DM OFF
Moisture O N
Indicationrange
Selecttheitem.
［Display］Application1Wheat
Protein OFF
Protein CM O N ＠ Moisture 1 5 . 0 ％
Protein DM OFF
Moisture O N
Indicationrange
Changethesetting.
［Display］Application1Wheat
Protein OFF
Protein CM O N ＠ Moisture 1 5 . 0 ％
Protein DM OFF
Moisture O N
Indicationrange
Selecttheitem.
［Measurement ］
［ Application ］ 1 Wheat
［Display ］
［Adjustment ］ Serialnumber
［Time ］ AB01234
［Communication ］ VER 1 .08
2006−08−31 13: 59
［Display］Application1Wheat
Protein OFF
Protein CM O N ＠Moisture 1 5 . 5 ％
Protein DM OFF
Moisture O N
Indicationrange
Changethesetting.

16
6-3-2. Setup the Indication Range
Operation Display Explanation
1. By using keys, select
the “Indication range” setting.
2. Press the key.
3. By using keys, and
choose items, and press the
key.
4. Change the value by using
keys until the fixed and
press the key.
In case “Protein Upper” is selected.
If you want to set another choices, re-
peat operation procedure 2~4.
If you press the
RTN
key, the initial
screen will be displayed.
［Indicationrange］Application1Wheat
Protein Upperlimit 1 2 . 0 ％
Lower limit 0 4 . 0 ％
Moisture Upperlimit 2 0 . 0 ％
Lower limit 1 0 . 0 ％
Selecttheitem.
［Display］Application1Wheat
Protein O N
Protein CM O N ＠Moisture 1 5 . 0 ％
Protein DM OFF
Moisture O N
Indicationrange
Selecttheitem.
［Indicationrange］Application1Wheat
Protein Upperlimit 1 2 . 0 ％
Lower limit 0 4 . 0 ％
Moisture Upperlimit 2 0 . 0 ％
Lower limit 1 0 . 0 ％
Selecttheitem.
［Indicationrange］Application1Wheat
Protein Upperlimit 1 2 . 0 ％
Lower limit 0 4 . 0 ％
Moisture Upperlimit 2 0 . 0 ％
Lower limit 1 0 . 0 ％
Changethesetting.

17
6-4. BIAS Adjustment
With a rice-analysis device that applies Near-Infrared method like this unit, there are
times when the extended use of light-emitting parts, sensors, etc.experiences minor
changes that happen over time that can cause the measurement value to change.
The difference between AN-900 ’s measurement value and composition values of
standard samples (The known sample from the previous correct composition value)
is referred to as the bias.Refer to P26 concerning the possibility of accuracy checking
this according to the standard samples.
To adjust bias of the unit, there are two models manual or automatic.
To set unit manually, prepare several standard samples which should be different
values per each composition, performing measurement as usually several times.
And then calculate requested bias per composition by manual.
To set unit automatically, prepare one standard sample, and as you measure accord-
ing to display, the automatic bias adjustment should run smoothly.
Note :With the automatic adjustment, you need only one standard sample, so it is often convenience
to do, but you need to be careful of doing the adjustment incorrectly when making mistakes
with standard sample or doing other things to throw off the results.
(1) Protein CM Display (CM : Constant Moisture basis)
AN-900 ’s protein content shows the percentage contain in terms of whole grain, including mois-
ture.This altenative is convenient at times, when you are, for example, calculating the weight of
protein inside grain that was measured. But when you compare proteins among many different
moisture is contained, there are times when it is convenient to assume the fixed moisture content.
This consideration is “CM Protein” which is displayed as protein conversion by assuming the fixed
moisture content (with AN-900, this is the same as the “@ Moisture %” is specified). When the
fixed moisture content is assumed to be “ 0% ”, this is referred to as a “dry conversion” (DM : Dry
Moisture Basis)
The conversion formula is as follows, so if Protein, Moisture, and / or “@ Moisture %” are set
incorrectly, The “CM Protein” conversion value will not be displayed correctly.
Protein CM = ×100 [%]
Protein
(100-Moisture) + @ Moisture %

18
(1) Manual adjustment mode
With manual setting, prepare 3 or 5 samples and calculate the difference between
average value of AN-900 and average value of standard samples for each composi-
tion. Because this alternative uses multiple samples to perform the bias adjustment,
it is able to perform more accurate bias adjustment than automatic adjustment.
Example of calculating Protein value and Performing Manual setting
In case of 3 type of sample (as Standard Samples)
• Measure samples to be tested 3 times each by AN-900 and culculation
Protein Values A B C
1th time 6.3 5.4 7.0
2th time 6.4 5.3 7.0
3th time 6.2 5.3 7.1
Average 6.3 5.3 7.0
Average of 3 sample’ s average (6.3+5.3+7.0)/3= 6.2
• Calculate average of standard sample’s values (as standard samples)
ABC
Protein of standard sample 6.8 5.6 7.4
Average of satandard sample’ s (6.8+5.6+7.4)/3= 6.6
• Calculate BIAS value
BIAS value = AV. standard samples - AV. measurements
0.4 = 6.6 - 6.2
0.4 is diecided as BAIS value
BIAS procedure is shown on the next page
When you can not prepare more than one standard sample
In order to perform accuracy and successful bias adjustment, we recommend
the alternative where you need 3 or 5 samples as standard samples, as is
mentioned above.However, in case that you only have one standard sample,
as s simple alternative, you measure it three time, and calculate average, and
decide BIAS value.
• Measure samples to be tested 3 times each by AN-900 and culculation
Protein average of measured values by AN-900 6.3
• Refer to standard sample protein value 6.8
• Calculation bias value
BIAS value = Standard value of sample - AV. measurements
0.5 = 6.8 - 6.3
0.5 is diecided as BAIS value

19
Operation Display Explanation
1. By using keys, select
the “Adjustment” setting.
2. Press the key.
And select item by using
key.
3. Press the key.
And change bias value by using
keys.
4. Press the key.
While you press the key, you can
increase and decrease the values
quickly with keys.
If you want to set another choices,
repeat operation procedure 2~4.
If you press the
RTN
key, the initial
screen will be displayed.
Note :Sometimes, BIAS adjustment doesn’t run correctly - For example when the windows on sample
case is dirty or when the sample becomes rather damaged. If it get dirty, measure after wiping
the dirt off of it. In case that the sample is damaged, you would be replaced new standard sample.
Note :BIAS value is also acceptable with minus, instead of plus.
BIAS = AV. Standard - AV. Measurements
-0.5 = 6.1 - 6.6
In case of BIAS value is mius -0.5
［Adjustment］Application1Wheat
BIAS / Protein − 0 0 . 1 ％
/Moisture ＋ 0 0 . 1 ％
BIASAuto-adjustmentwithSTD.sample.
Selecttheitem.
［Adjustment］Application1Wheat
BIAS / Protein − 0 0 . 2 ％
/Moisture ＋ 0 0 . 1 ％
BIASAuto-adjustmentwithSTD.sample.
Changethesetting.
［Adjustment］Application1Wheat
BIAS / Protein − 0 0 . 2 ％
/Moisture ＋ 0 0 . 1 ％
BIASAuto-adjustmentwithSTD.sample.
Selecttheitem.
［Measurement ］
［ Application ］ 1 Wheat
［Display ］
［Adjustment ］ Serialnumber
［Time ］ AB01234
［Communication ］ VER 1 .08
2006−08−31 13: 59

20
Operation Display Explanation
1. By using keys, select
the “Adjustment” setting.
2. Press the key, and select
“Automatic adjustment” by using
keys.
3. Press the key.
When you want to adjust individual
composition values,use
keys, and change the highlighted
composition.Then press the
key. Using keys, you will
be able to revise the values.When
they are to your selection, press the
key.
(2) Automatic adjustment mode
The composition values should be the
same of standard sample’s.
Compositions of standard sample are
changeable per each standard
sample.
While you press the key, you can
increase and decrease the values
quickly with keys.
［Adjustment］Application1Wheat
Ingredientvaluesoftheregistered
standardsample.
Protein 0 6 . 0 ％
Moisture 1 5 . 5 ％
FStartBIASauto-adjustment.
［Adjustment］Application1Wheat
Ingredientvaluesoftheregistered
standardsample.
Protein 0 6 . 0 ％
Moisture 1 5 . 5 ％
Changethesetting.
［Adjustment］Application1Wheat
BIAS / Protein − 0 0 . 1 ％
/Moisture ＋ 0 0 . 1 ％
BIASAuto-adjustmentwithSTD.sample.
Selecttheitem.
［Measurement ］
［ Application ］ 1 Wheat
［Display ］
［Adjustment ］ Serialnumber
［Time ］ AB01234
［Communication ］ VER 1 .08
2006−08−31 13: 59