Gehaka G810 User manual
User manual
Grain moisture meter model G810
Version: 1.00.000
Date: 08/2016
Summary
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G810 instalation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1. Measuring – Moisture measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 Diagram of the functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2. Conguration...............................................
2.1 Date and time adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Adjusting the number of elements to be averaged . . . . . . . . . . . . . .
2.3 Adjusting the number of decimal digits . . . . . . . . . . . . . . . . . . . . . . .
2.4 Adjusting the print mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.5 Adjust number of copies of the printed report . . . . . . . . . . . . . . . . . .
2.6 Adjusting the Contrast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.7 Unlocking chamber door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.8 Uploading internet equation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.9 Uploading internet equation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.10 Self-report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.11 Language selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 RS232 Serial Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Thermal printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4 Error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5 Extreme conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6 Technicalspecications:....................................
3.7 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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4I Grain moisture meter model G810
The G810 grain moisture meter includes all the characteristics to provide the most
accurate grain moisture reading.
With a simple operation and without operator intervention, model G810 will provide
moisture readings in a few seconds, for a wide variety of products.
Withasimplekeypadofonlyvekeys,themetercanbeeasilyoperatedandquicklyset
up, without the need of intensive user training.
By applying the “FLOW THRU” technology, G810 provides a fully automatic moisture
analysis. There is no need of previous sample weighing; temperature, density and
weight corrections are performed automatically, without the use of any other resource
or additional tables.
Calibration curves for each cereal have been obtained at Gehaka laboratories, using
samples collected from several areas of the plantation. Using the standard oven method
as a reference, measurement scales for each product were developed. These curves
weretransferredtotheG810memoryandtheyareeasilyidentiedbyproductname
and their version.
If the development of new calibration
curves is necessary, there is a function at
www.moisturetester.com.br which allows creating,
editing and installing them in your G810 grain
moisture meter.
G810 includes three instruments into one, managed by
a state-of-the-art internal microprocessor. These three
instruments are: One electronic scale, which measures
the sample weight; one built-in digital thermometer,
which measures the sample temperature inside the
chamber and the G810 temperature and nally one
capacity meter, which indicates the moisture percent,
to be later corrected by other parameters.
Introduction
Grain moisture meter model G810 I 5
Its program performs all the required calculations, thus providing extremely reliable
and repeatable readings. It also performs: automatic setting and checking the proper
operation of all electronic circuits.
The meter’s FLOW THRU design allows the performance of quick measurements, namely,
in less than 15 seconds and without the operator intervention, in a fully automatic way.
Just select the product, pour the sample in the G810 hopper, until a “BEEP” is given,
the G810 will load the sample, perform the measurement and automatically unload the
sample. After a few seconds, you will have the moisture and temperature measurement,
all this shown on an easy to read 16-character / 2-line alphanumeric LCD display, in
English.
G810 has also a bidirectional RS232C serial communication port. With this, we can
connect the G810 to a printer so the measurement is printed in a label, thus making
the counterchecking easier, or else, we can connect the meter to a PC and transfer the
information to a managing system.
The G810 is operated by a FULL RANGE automatic power source, which means the meter
operation is ensured for 90 - 240VAC mains, thus protecting the meter from network
voltage variations.
Indication conventions for G810 LCD display:
>Right-hand arrow
<Left-hand arrow
YES Option acknowledgment.
ESCAPE Exit.
6I Grain moisture meter model G810
Description
1. SAMPLE LOADING HOPPER
Place where the cereal sample to have the
moisture measured will be weighed
2. LCD DISPLAY
Displays results and settings with
alphanumeric characters.
3. THERMAL PRINTER (OPTIONAL)
Device for printing measurement results.
Silent, low consumption operation.
4. DRAWER
Receives the cereal sample from the chamber,
after the measurement was performed. The
meter unloads automatically.
5. PLASTIC SCOOP
Used for pouring the sample into the funnel.
6. SAMPLING CUP AND FUNNEL
This cup shall be used for taking the sample.
Yourfunnelisusedformakingthecuplling
easier and “cutting” the sample excess.
7. ON/OFF
Switches ON/OFF the G810 meter.
Operating with numerical setting multiplies
by 10 the indicated value.
8. YES
Conrmsfunctionorsettingselection.
Grain moisture meter model G810 I 7
9. RIGHT-HAND ARROW
It displays the next function or increases the value of one scale interval.
10. LEFT-HAND ARROW
Displays the previous function or decreases the value of one scale interval.
11. ESCAPE
Exits a function or setting that is being operated at that time. Operating with
numerical setting divides by 10 the indicated value.
12. POWER CORD CONNECTOR
Place where the power cord will be connected. G810 operates between 90 to 240
VAC.
13. CARRYING HANDLE
Used for carrying the G810. Caution: before lifting the G810 remove the drawer,
because due to the tilt it may fall down.
14. RS232 SERIAL PORT CONNECTOR
Data output for printer or PC.
15. HARD LOCK
When connected to RS232 serial output, it releases access to “Conguration”
function,whereG810congurationswillbemade.
ADJUSTING A VALUE
In addition to the direct functions of the keypad, it can assume other functions, and one
of them is making easier to type a value.
When the setting of a value is selected, the display will show the current value, and to
change it proceed as follows:
KEY FUNCTION
ON/OFF Multiplies the current value by 10;
RIGHT-HAND ARROW Increases the indicated value by one scale interval;
LEFT-HAND ARROW Decreases the indicated value by one scale interval;
ESCAPE (EXIT) Divides by 10 the current value;
YES Conrmsthecurrentvalueandcompletesthesetting.
8I Grain moisture meter model G810
Carefully check the packing, if there were marks and damages in the cardboard case,
this means that there were problems during shipment.
Open the packaging, checking the conditions of G810. Remove the equipment and check
whether all its accessories are included.
Place the G810 on a stable table, in order to ensure it will not move during the operation.
Remove the adhesive tapes fastening the drawer and check whether it slides easily.
If the acquired model features a Thermal Printer, install the paper roll as stated in
procedure “3.2 Thermal Printer”.
ConnecttheACcordtotheconnectorontherearpanelandtitsteadily,takingcare
that the plug is fully inserted in the connector. It is not necessary to verify the mains
voltage; the power supply is FULL RANGE, not requiring mains selection. We also do not
recommend the use of voltage stabilizers.
When the cord is plugged in the outlet, G810 will start its operation, performing a self-
diagnosis in order to check whether its components are working properly. If by any
chancethemeterveriesthatsomeofitscomponentsisimproperlyoperating,itwill
indicate an error message on the display regarding the fault.
Leave the G810 meter preheating for 10 minutes. The G810 meter shall operate
continuously plugged in the outlet; use only the ON/OFF key. This way, the equipment
enters the “sleeping” mode and the power consumption is lower than 1 W, however it is
ready to operate. The G810 meter shall be operated in a place free of excessive dust and
with room temperature between 0 º and 40 ºC.
G810 installation
Grain moisture meter model G810 I 9
1. Measuring – Moisture measuring
1. Select“Measuring”fromthemainmenu,depressYEStoconrm;
2. Select the type of cereal you want to measure the moisture. Use Right hand/
LefthandARROWkeysuntilndingthedesiredproduct.Indicationsbelowthe
product names are the moisture minimum and maximum limits the G810 meter
isabletomakethereading.Depress“YES”toconrmyourchoice.
3. Take a sample of at least 200 g of the product you want to
measure the moisture and,using the plastic scoop, pour the
cereal sample into the funnel of the Sampling Cup,untillling
the Funnel. Slightly lift the funnel and “wipe o” the sample
excess, and then pourthe sample into the G810 meter hopper, a
beep will be heard indicating the sample wasweighed.
4. Within a few seconds, the G810 meter will display the value
of product moisture. If theRight hand/Left hand keys are
depressed, the G810 meter will display all the measurements
made, namely:
================
WHEAT
M o i s t.: 13.39 %
================
When selecting Right hand/Left hand Arrow we have:
================
Te m p. 24.8ºC
Dens.:79.9 kg/hL or lb/bu -> Sample density.
================
10 I Grain moisture meter model G810
5. After having performed a successful measurement, the G810 meter will send all
measurement data through the serial output to the printer or PC. An example of
report follows:
================================
GEHAKA G810
Fir m wa r e Ve rsion 1.00.000
Hardware Version 1.00
Serial No. 13020101001000
================================
Current Product...= Wheat
Equation Version. = 64
S a m pl e .......... = 21
Sample Temp………... = 28.0 ºC
M et e r Te m p....... = 28.9 ºC
Sample Weight…….. = 167.7 g
D e n sit y ......... = 77.0 k g/ h L
--------------------------------
M o i s t u r e ........ = 13.39 %
--------------------------------
--------------------------------
Signature 18:20
Responsible person 25/02/13
================================
NOTE: If there is a great temperature dierence between the product and
the G810 Hopper where the temperature sensor is located, the meter
will wait until there is a thermal balance between both of them. This
could introduce a delay for the temperature measurement to be
made. This way, we improve the meter precision, by measuring the
actual sample temperature.
7. After the measuring cycle, the instrument will unload the sample into the drawer.
Remove sample fromdrawer.
8. When the G810 meter is showing the measurement results on the display and
a new sample is pouredinto the hopper, the G810 meter will perform a new
measurement,usingthesamecongurationofthepreviousmeasurement.Ifthe
ESCAPE key is depressed, the MEASUREMENT option will be exited,returning to
the MAIN menu.
NOTE: If the moisture content is higher than 22%, the G810 meter will request
measuring again the same sample, repeating the measurement three
times in order to ensure a higher reading precision.
Grain moisture meter model G810 I 11
A diagram follows indicating all G810 meter functions and it will help to understand the
operation.
1.1 Diagram of the functions
12 I Grain moisture meter model G810
The“Conguration”modeoersthepossibilitytomake
settingsorcongurationsintheG810meter.Now,we
will describe each one of these functions.
Note that the number shown before each function
corresponds to the same shown in the G810 Menu,
this way it is easier to identify in the manual where the
explanation of each function is.
If the Hard Lock key is not connected to the G810 Serial
Port and the access to this function is attempted, the
display will show an error message “Access locked, Use
the Hard Lock” stating the need of the key presence.
If you wish, remove the key after entering the
“Conguration”,thereisnotanewchecking.Whenyou
exit the function, it will be locked again.
G810 settings and Equations can only be changed
with the presence of the Hard Lock key, this ensures
improved security.
2. Conguration
Grain moisture meter model G810 I 13
This function makes the Date and Time adjustment of the real time clock (RTC). This
value of date and time will be sent in the reports through RS232 Serial Port after the
measurement.
G810 is already delivered with the clock adjusted at the factory, but it may eventually be
readjusted for the Daylight Saving Time.
There is an internal battery that keeps the clock working even when the G810 meter
is disconnected from the outlet. This battery lasts for over 5 years; to have it tested,
just disconnect the G810 meter and see if the clock indicates 00:00:80, if this happens,
contact Gehaka service to replace the battery.
To perform the Date and Time adjustment:
1. Goto“Conguration”anddepressYES;youhavetoputtheHardLockin
the serial output;
2. Go to function “2.1 Date and Time Adjustment” and depress YES;
3. Now use the Right hand/Left hand ARROWS to Increase or Decrease the
value of the TIME.When the value is right, depress YES and the G810 will go
tothenexteldtobeadjusted;
4. Repeat this procedure for adjusting MINUTES, DAY, MONTH, and YEAR.
NOTE: The value being adjusted will be shown underlined, after depressing
YES it will go to the next item to be adjusted.
2.1 Date and time adjustment
14 I Grain moisture meter model G810
2.2 Adjusting the number of elements to be averaged
This function adjusts the number of elements to be used for making the average of
readingsusedtocalculatethenalvalueofmoisturepercent.Wecanselectbetween1
and 5 elements.
To adjust the number of Elements to be Averaged:
1. Goto“Conguration”anddepressYES;youhavetoputtheHardLockintheserial
output;
2. Go to function “2.2 Adjusting the Number of Elements to be Averaged”, and
depress YES;
3. Now use the Right hand/Left hand ARROWS to Increase or Decrease the Number
of Elements to beAveraged. This adjustment is limited between 1 to 5 elements;
4. Depress YES to complete the adjustment.
NOTE: It should be noted that, irrespective of the adjustment made in this
function, when the moisture content exceeds 22% there will be
always made a reading averaging of three elements.
This function makes the adjustment of the decimal digits shown on the display and in
the moisture reports. If one decimal digit is used, the rounding of the second decimal
digit will be automatically made. The factory default setting is one decimal digit.
2.3 Adjusting the number of decimal digits
Grain moisture meter model G810 I 15
To adjust the number of decimal digits:
1. Goto“Conguration”anddepressYES;youhavetoputtheHardLockintheserial
output;
2. Go to function “2.3 Adjusting the Number of Decimal Digits”, and depress YES;
3. Now use the Right hand/Left hand ARROWS to increase or decrease the number
Decimal Digits. Thisadjustment is limited between 1 and 2 decimal digits;
4. Depress YES to complete the adjustment.
2.4 Adjusting the print mode
This function sends the measurement data to a Printer or PC.
A. Printer:
In this mode, measurement data in a report format will be sent, as stated below, through
the serial data output RS232. If the G810 meter has a built-in thermal printer, this report
will be printed and simultaneously sent through the serial data output RS232.
================================
GEHAKA G810
Firmware Version 1.00.000
Hardware Version 1.00
Serial No. 13020101001000
================================
Current Product = Wheat
Equation Version = 64
Sample ........... = 21
Sample Temp....... = 28.0 ºC
Meter Temp........ = 28.9 ºC
Sample Weight ………. = 167.7 g
Density…………………………. = 77.0 kg/hL
--------------------------------
Moisture ......... = 13.39 %
--------------------------------
--------------------------------
Signature 18:20
Responsible person 25/02/13
================================
16 I Grain moisture meter model G810
B. Computer:
The Computer Mode just sends the data, without considering formats. The data
is separated by “;” in order to make the separation easier. This report may be easily
captured and interpreted by a computerized system connected to the RS232 serial port.
Forthisfunction,iftheG810meterhasabuilt-inprinter,itwillbeswitchedobythe
G810 and will not print this data.
See below an example of the string that is sent. The ending is with CR and LF.
15; 12.35; 141.7; 77.0; 26.9; 27.4; 66.4;Wheat;
20111101;G810; 1.00.000;1.00;”1234567891234”; 16:51; 18/01/13;
Descriptionofdataeldssent:
Sample;
Moisture;
Weight;
Density;
Sample Temperature;
Instrument Temperature;
Scale _ A (Capacitance);
Product Name;
Equation Version;
Instrument Model;
Firmware Version;
Hardware Version;
Serial number;
Time;
Date;
CR + LF
To perform the print mode selection:
1. Goto“Conguration”anddepressYES;youhavetoputtheHardLockintheserial
output;
2. Go to function “2.4 Adjusting Print Mode”, depress YES;
3. Use Right hand/Left hand ARROW keys to select between the two printing modes,
Printer orComputer;
4. Depress YES to complete the adjustment.
Grain moisture meter model G810 I 17
2.5 Adjusting number of report copies
2.6 Adjusting the contrast
This function allows adjusting the number of copies that will be printed after each
moisture measurement.
This function allows adjusting the contrast of the LCD display.
This value can be adjusted between 55% and 100%, and 100% is the maximum contrast.
This value will be stored in the G810 memory.
To adjust the Contrast:
1. Goto“Conguration”anddepressYES;youhavetoputtheHardLockintheserial
output;
2. Go to function “2.5 Contrast Adjustment” and depress YES;
3. Use the Right hand/Left hand ARROWS to increase or decrease the Contrast
value. This adjustment ismade in 5% steps;
4. Depress YES to complete the adjustment.
18 I Grain moisture meter model G810
When measuring products such as rough rice, soybean
bran, etc., the Chamber may accumulate residues,
especially when such cereals are very dry with a low
relative humidity.
Before performing the cleaning, the Chamber Door
shall be unlocked, if it is attempted to open the door
without using this function, the G810 chamber could be
damaged.
To open the door and performing the cleaning:
1. Goto“Conguration”anddepressYES;youhave
to put the Hard Lock in the serial output;
2. Go to function “2.6 Unlocking Chamber Door”,
and depress YES;
3. Use the LEFT HAND ARROW to open the door;
the G810 will emit the typical noise of the
ChamberDoor opening;
4. Disconnect the AC Cord from the G810 rear
panel;
5. Put down horizontally the G810 as shown in the
photo;
6. Carefully perform the Chamber cleaning;
7. Connect the G810 again for operation.
2.7 Unlocking chamber door
Grain moisture meter model G810 I 19
One great innovation of G810 is by the use of the Internet, performing a customization
of the products the G810 will measure. All this information, and the guidance to execute
them may be accessed at www.moisturetester.com.br.
2.8 Uploading internet equation
Provider
INTERNET
Site:
www.moisturetester.com.br
GEHAKA
RS232
20 I Grain moisture meter model G810
Basically we can:
• Register the G810. This register entitles to an extension of six months of the
Warranty; do not lose thisopportunity. It also allows us to know which scales are
more important to you, and allows us to keep youinformed about new updates,
includingimprovementsinG810rmware.
• Selecting which products will be sampled by G810. With this, the time for changing
scale is reduced, thusmaking the operation easier. Also a backup of the G810
Equations in the cloud will be made, thusensuring their return to the instrument,
even if it were totally damaged.
• Updating the equations as soon as they are reviewed. Gehaka works around the
year reviewing scales ofthe G810 meters, or developing new ones, however, before
the equipment had to be carried to theService to receive these updates. Now with
the use of the Internet you will receive an e-mail telling thatthere was a review of a
Product that is in your equipment and, in a few minutes, connected to a PC, it canbe
updated.
• Creating new Equations. It is possible, starting from a “Universal Scale”, to create
a new equation for aproduct the G810 does not have. Just set up a table with the
readings of the Standard and those obtainedin the G810 and in a few minutes you
will create a new Equation and will be able to install it in the G810.Through our
website you will get all the support and guidance for the creation.
Connecting the G810 to a PC is quite simple: Just follow the steps below:
1. The computer must be connected to the Internet, otherwise it will not be possible
todownloadthenecessarylesfortheinstallation;
2. Find an unused USB port in the PC;
3. Connect the Serial Cable supplied with the G810 to the USB port, do not still
connect to the G810;
4. Wait for the driver installation, this could take up to 5 minutes, depending on
theInternetbandwidth.ThisstepwillonlybeexecutedthersttimetheCableis
connected to the PC, after this the PC willautomatically recognize the Serial Cable;
5. Connect the G810;
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