User manual
Moisture Meter G650i
Version: 1.00.000
Date: 06/20/2014
Summary
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G650
i installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagram of the functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1. Measuring – moisture measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2. Percentage (impurities) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3. Approximate density (hectoliter weight) . . . . . . . . . . . . . . . . . . . . . . . . . . .
4. Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5. Conguration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1. Date and time adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2. Adjusting the number of elements to be averaged . . . . . . . . . . . . .
5.3. Adjusting the uumber of decimal digits . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.4. Adjusting the print mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.5. Adjusting the number of report copies . . . . . . . . . . . . . . . . . . . . . . . .
5.6. Adjusting the contrast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.7. Uploading Internet equation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.8. Uploading standard equation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.9. Self-report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.10. Language selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.11. Auto Shuto . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RS232 Serial port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extreme conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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4 I Moisture Meter G650i
The G650i moisture meter includes all the characteristics to provide the most accurate
grain moisture reading.
With a simple operation and without operator intervention, model G650i will provide
moisture readings in a few seconds, for a wide variety of products.
With a simple 5-key keypad, the instrument can be operated and quickly set up, without
intensive user training.
By applying the “FLOW THRU” technology, G650i provides a fully automatic moisture
analysis. There is no need of previous sample weighing; temperature, density and weight
corrections are automatically performed, 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 were
transferred to the G650i memory and they are easily identied by product name and their
version.
If the development of new calibration curves is necessary, there is a function at www.
medidoresdeumidade.com which allows creating, editing and installing them in your
G650i moisture meter.
G650i 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 G650i temperature and nally one capacity meter,
which indicates the moisture percent, to be later corrected
by the other parameters.
Its program performs all the necessary calculations, thus
providing extremely reliable and repeatable readings.
Introduction
Moisture Meter G650i I 5
It also performs: automatic setting and checking the proper operation of all electronic
circuits.
The design of FLOW THRU instrument 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 G650i weighing cup, until a “BEEP” is
given, the G650i will load the sample, perform the measurements and will 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 Portuguese.
G650i has also a bidirectional RS232C serial communication port.
With this, we can connect the G650i to a printer so the measurement is printed on 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 G650i is operated by an external FULL RANGE automatic power source, which means
the instrument operation is ensured for 90-240 VAC mains, thus protecting the instrument
from network voltage variations.
Indication conventions for G650i display:
ON Connect the G650i.
-> Right-hand arrow.
<- Left-hand arrow.
YES Option acknowledgment.
OFF Exit, o.
6 I Moisture Meter G650i
1. SAMPLE LOADING HOPPER
Place where the cereal sample, to have the
moisture measured, will be poured.
2. DISCHARGE PUSHBUTTON
By means of this button we will discharge the
sample from the Measuring Chamber. It will be
used at the end of moisture measurements.
3. LCD DISPLAY
Displays results and settings with alphanumeric
characters.
4. LIGA (ON)
Connects the G650i.
5. YES
Conrms function or setting selection.
6. RIGHT-HAND ARROW
It displays the next function or increases the value
by one scale interval.
7. LEFT-HAND ARROW
Displays the previous function or decreases the value
by one scale interval.
8. OFF (ESCAPE)
Switches o G650i , exits a function or setting.
9. DRAWER
Receives the cereal sample from the chamber, after the measurement was
performed.
Description
Moisture Meter G650i I 7
10. AC ADAPTER
A converter with switchable 90 – 240 VAC power
source; if disconnected, operation via internal
9V battery will start.
11. RS232 SERIAL PORT CONNECTOR
Data output for printer or PC.
12. HARD LOCK (KEY)
When connected to RS232 serial output, it releases
access to “Conguration” function, where G650i
congurations will be made.
13. WEIGHING CUP
Sample receiving device for weighing purposes
and used to pour out the sample from the
Weighing Cup. It can also be used as a standard
volume for measuring the cereal density (kg/hL).
14. SCRAPER
Used for wiping o the grain excess when the
grain density measurement is performed.
8 I Moisture Meter G650i
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 G650i . Remove the equipment and check
whether all its accessories are included.
Place the G650i 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.
Connect the AC Adapter to the connector on the rear panel and t it steadily, taking care
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 ON key is operated, G650i will start its operation, performing a self-diagnosis
in order to check whether its components are working properly. If, by any chance, the
instrument veries that some of its components is improperly operating, it will indicate an
error message on the display regarding the fault.
The G650i can operate connected to the power outlet or using the internal 9V battery.
This switching is automatically performed. It should be noted that during operation via 9V
battery, the Display Backlight will be switched o in order to save battery energy. When
the G650i is initialized, during the self-diagnosis a percentage gure is displayed indicating
the battery status, as follows:
30 % - 100 % Normal operation.
0 % - 30 % Request of battery exchange or recharging.
0 % Indication of low battery, G650i stops operating.
Function “4. Battery” indicates battery voltage in addition of its status in a percentage
gure.
The G650i shall be operated in a place free of excessive dust and with room temperature
between 0 º and 40 ºC.
G650i installation
Moisture Meter G650i I 9
A diagram follows indicating all G650i functions and it will help to understand the
operation.
Diagram of the functions
10 I Moisture Meter G650i
1. Measuring – moisture measuring
1. Select “Measuring” from the main menu, depress YES to conrm;
2. Select the type of cereal you want to know the moisture content. Use Right hand
Left hand ARROW keys until nding the desired product. Indications below the
product names are the moisture minimum and maximum limits the G650i meter
is able to make the reading. Depress “YES” to conrm your choice.
3. Take a sample of at least 200g of the product you want to know the moisture
content and, using the plastic scoop, slowly pour the cereal sample into the
weighing cup, until 100% is shown on the display, a beep will be heard indicating
the sample weight is correct. If by any chance the weight is exceeded, the display
will show a value higher than 100%, and the sample excess shall be removed from
the weighing cup.
4. Pour the weighed sample into the Loading Hopper of G650i, using the edge of
the Weighing Cup as a reference. The sample shall be poured quickly, do not pour
slowly because the instrument repeatability is reduced.
5. Within a few seconds, the G650i meter will display the value of product moisture.
If the Right hand/Left hand keys are depressed, the G650i meter will display all
the measurements made, namely:
When selecting Right hand/Left hand Arrow we have:
-> Sequence number of the measured sample.
WHEAT
Moist.: 13.0 9%
Te m p.: 2 4.8 C
Sample: 21
Moisture Meter G650i I 11
6. After having performed a successful measurement, the G650i meter will send all
measurement data through the serial output to the printer or PC. An example
of report follows:
Note: If there is a great temperature dierence between the product and
the G650i Chamber, where the Temperature Sensor is located, the meter
will wait until there is a thermal balance between both of them. This could
make the temperature measurement taking more time to be made. This way, we
improve the meter precision, by measuring the actual sample temperature.
7. After making the reading, discharge the Chamber using the discharge pushbutton.
8. When the G650i meter is showing the measurement results on the display and
a new sample is poured into the Weighing Cup, the G650i meter will perform a new
measurement, using the same conguration of the previous measurement. If the
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 G650i meter will request
measuring again the same sample, repeating the measurement three times in
order to ensure a higher reading precision.
12 I Moisture Meter G650i
The Percentage function is used to calculate the Impurity percentage; in a simple and
quick way we obtain the results, performing the following procedures:
1. Take the sample you want to know the impurity contents, in a representative
way regarding the batch being examined. The sample shall weigh at least 50g.
2. If the scale is not indicating the 0.0 g reading, use the YES key for taring (zeroing)
the scale.
3. The percentage function starts considering a calculation basis weight of 250g.
Therefore, the sample that is poured will indicate the Percentage considering as
a basis the initial value of 250g.
4. For programming 100%, depress the LEFT-HAND ARROW, immediately the
weight value on the display will be the calculation basis, and we will have a 100%
indication. The minimum weight value for the correct operation of the function is
50g, with lower values the function does not program 100%. The scale maximum
load is 700g.
5. Pour the sample from the Weighing Cup on the sieve, sieve it and pour back
into the Weighing Cup the impurities found, the G650i will indicate their
percentage.
10.0 g
4.0 %
2. Percentage (impurities)
Moisture Meter G650i I 13
6. If the RIGHT-HAND ARROW is depressed, a report with the result will be printed,
as shown below:
7. To complete this function, depress OFF (ESCAPE), a summary of the key actions on
this function follows:
YES KEY: Tares (zeroes) the Scale;
LEFT-HAND ARROW KEY: Programs 100%;
RIGHT-HAND ARROW KEY: Sends a report through the Serial port;
OFF KEY: Exits the function.
The Density function is used to perform the approximate density (specic weight)
calculation of the cereal, or as it is commonly known the Hectoliter Weight. The unit of
measure is kg/hL Perform the following procedures:
1. Take the sample you want to know the Density, in a representative way regarding
the batch being examined.
3. Approximate density (hectoliter weight)
14 I Moisture Meter G650i
2. Install the Weighing Cup on the G650i. If the scale
is not indicating the 0.0g reading, use the YES key
for taring (zeroing) the scale..
3. Remove the Weighing Cup from the G650i, place
it on a table and pour the sample until it richly
overows the cup. The overow is important to
standardize the amount of grains inside the Cup.
4. Wipe o the Weighing Cup using the Scraper. Make
a slow movement removing the excess of grains in
the Cup. If necessary wipe o more than once, and
leave the grains leveled to the Cup edge. The
measurement quality depends on this precaution.
5. Place the Weighing Cup back on the G650i, it will indicate the sample Density
considering the Weighing Cup volume and the sample weight. The scale
maximum load is 700g.
6. If the RIGHT-HAND ARROW is depressed, a report with the result will be printed,
as shown below::
3 42.6 g
70.0 kh/hL
Moisture Meter G650i I 15
7. To complete this function depress OFF (ESCAPE), a summary of the key actions
on this function follows:
YES KEY: Tares (zeroes) the Scale;
LEFT-HAND ARROW KEY: Sends a report through the Serial port;
RIGHT-HAND ARROW KEY: Sends a report through the Serial port;
OFF KEY: Exits the function;
The Battery function is used to perform the measurement and indicate status at that
time. Its main usefulness is to prevent the power failure during an external measurement.
Perform the following procedures:
1. Depress YES to enter the “Battery” function. A screen will be shown
indicating the Battery voltage and remaining service life percentage. It is
possible that a new battery indicates a percentage higher than 100% and it
will be considered discharged when indicates 0%. It should be noted that the
system only switches to Battery when the Power Adapter is removed from the
mains.
2. There are two errors that the Battery measuring system shows, namely:
8.3 V olt s
84 %
4. Battery
Error 16:
Source > 13 Volts
16 I Moisture Meter G650i
This error indicates that an unsuitable Adapter is being used to energize
the G650i, there is a high risk of damaging the equipment electronics,
please immediately remove the source being used and purchase from
Gehaka a new mains Adapter.
This error shows that the battery service life is over, please replace
the battery as shown further on this manual.
3. If the RIGHT-HAND ARROW is depressed, a report with the result will be
printed, as shown below:
4. Gehaka even provides an optional item that is a Rechargeable Battery for G650i.
This Battery has the same mechanical appearance of the disposable Battery, but it
is a Nickel Cadmium rechargeable Battery.
Only in this case the mains Adapter will be another one with a voltage of 12 volts,
enough to recharge the Battery in 12 hour charging. To verify whether the
battery was fully recharged, observe the charge percentage in this function, it
Error 17:
Disch. Battery
Moisture Meter G650i I 17
should reach nearly 120%, and at that moment the Adapter may be removed
from mains. The expected autonomy for this Battery is 10 hours of continuous
operation. There may be variations depending on the battery model used.
To enhance battery duration, have always connected the “5.11 Auto Shuto”
function.
5. To complete this function, depress OFF (ESCAPE), a summary of the key actions
on this function follows:
YES KEY: No eect on this function;
LEFT-HAND ARROW KEY: Sends a report through the Serial port;
RIGHT-HAND ARROW KEY: Sends a report through the Serial port;
OFF KEY: Exits the function;
5. Conguration
The “Conguration” mode oers the possibility to make settings or congurations in the
G650i meter. Now, we will describe each one of these functions.
The “Conguration” mode oers the possibility
to make settings or congurations in the G650i
meter. Now, we will describe each one of these
functions.
Note that the number shown at the start of each
function corresponds to the same shown in the
G650i 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
G650i 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.
18 I Moisture Meter G650i
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.
G650i 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 G650i meter is
disconnected from the power outlet.
This battery lasts for over 5 years; to have it tested, just disconnect the G650i 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. Go to “Conguration” and depress YES; you have to put the Hard Lock in the serial
output;
2. Go to function “5.1 Date and Time Adjustment” and depress YES;
5.1. Date and time adjustment
If you wish, remove the key after entering the
“Conguration” function, there is not a new checking.
When you exit the function, it will be locked again.
G650i settings and Equations can only be changed
with the presence of the Hard Lock key, this ensures
improved security.
Moisture Meter G650i I 19
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 G650i will go to the next
eld to be adjusted;
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.
This function adjusts the number of elements to make up the average of readings used
to calculate the nal value of moisture percent. We can select between 1 and 5 elements.
To adjust the number of elements to be averaged:
1. Go to “Conguration” and depress YES; you have to put the Hard Lock in the serial
output;
2. Go to function “5.2 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 be Averaged. This adjustment is limited between 1 and 5 elements;
Average values= 1
- < YES > +
5.2. Adjusting the number of elements to be averaged
15:0 0:0 0
27/11/13
20 I Moisture Meter G650i
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
with the average value of three elements.
5.3. Adjusting the uumber of decimal digits
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.
To adjust the number of decimal digits:
1. Go to “Conguration” and depress YES; do not forget to put the Hard Lock in the
serial output;
2. Go to function “5.3 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. This adjustment is limited between 1 and 2 decimal digits;
4. Depress YES to complete the adjustment.
Decimal digits = 1
- < YES > +
Moisture Meter G650i I 21
5.4. 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 Port RS232.
If the G650i meter has a built-in Thermal Printer, this report will be printed and
simultaneously sent through the Serial Port RS232.
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.
22 I Moisture Meter G650i
See below an example of the String that is sent. The ending is with CR and LF.
15; 12.35; 141.7; 0.0; 26.9; 27.4; 66.4; Wheat; 20111101;G650i;
1.00.000;1.00;16:51; 18/01/13;<CR><LF>
Description of data elds sent:
Sa m ple;
Moist u r e;
Weight;
Densit y;
Sample Temperature;
Instrument Temperature;
Scale _ A (Capacitance);
Product Name;
Equation Version;
Instrument Model;
Fir mwar e Versio n;
Hardware Version;
Ti m e;
Dat e;
<CR><LF>
To perform the print mode selection, proceed as follows:
1. Go to “Conguration” and depress YES; do not forget to put the Hard Lock in the
serial output;
2. Go to function “5.4 Adjusting print mode”, depress YES;
3. Use Right hand/Left hand ARROW keys to select between the two printing
modes, printer or computer;
4. Depress YES to complete the adjustment.
> Printer
Computer
Moisture Meter G650i I 23
This function allows selecting how many copies of the printing report will be generated.
We may select from 0 to 5 copies, where 0 copies means not printing the report. For each
copy sent, a new screen will show up requesting to tear the paper and to press YES to the
next copy to be printed.
To select the number of copies proceed as follows:
1. Go to “Conguration” and depress YES; do not forget to put the Hard Lock in the
serial output;
2. Go to “5.5 Adjust Nr. Print Copies”, depress YES;
3. Use Right hand/Left hand ARROW keys to select between the two printing
modes, printer or computer;
4. Depress YES to complete the adjustment.
Detach and YES
To P ri n t ...
Copies= 1
- < YES > +
5.5. Adjusting the number of report copies
24 I Moisture Meter G650i
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 G650i memory.
To adjust the contrast:
1. Go to “Conguration” and depress YES; do not forget to put the Hard Lock in the
serial output;
2. Go to function “5.6 Contrast Adjustment” and depress YES;
3. Use the Right hand/Left hand ARROWS to increase or decrease the Contrast value.
This adjustment is made in 5% steps;
4. Depress YES to complete the adjustment.
Contrast= 90%
- < Adjusting > +
5.6. Adjusting the contrast
Moisture Meter G650i I 25
5.7. Uploading Internet equation
One great innovation of G650i is the possibility of using the Internet to perform a
customization of the products the G650i will measure. All this information, news and the
guidance to execute them may be accessed at ww w.mo isturetester.com.br.
Basically we can:
• Register your G650i . This register entitles to an extension of six months of
the Warranty; do not lose this opportunity. It also allows us to know
which scales are more important to you, and allows us to keep you informed
about new updates, including improvements in G650i rmware.
• Selecting which products will be sampled by G650i . With this, the time for
changing scale is reduced, thus making the operation easier. Also a backup of the
G650i Equations in the cloud will be made, thus ensuring 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 of the G650i meters, or developing new ones, however,
before the equipmenthad to be carried to the Service to receive these updates.
Provider
INTERNET
Website:
www.moisturetester.com.br
GEHAKA
RS232
26 I Moisture Meter G650i
Now with the use of the Internet you will receive an e-mail telling that there
was a review of a Product that is in your equipment and, in a few minutes,
connected to a PC, it can be updated.
• Creating new Equations. It is possible, starting from a “Universal Scale”, to create a
new equation for a product the G650i does not have. Just set up a table
with the readings of the Standard and those obtained in the G650i and in a
few minutes you will create a new Equation and you will be able to install
in your G650i . Through our website you will get all the support for the creation.
Connecting the G650i 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
to download the necessary les for the installation;
2. Find an unused USB port in the PC;
3. Connect the Serial Cable supplied with the G650i to the RS232 serial port, do not
still connect to the G650i;
4. Wait for the driver installation, this could take up to 5 minutes, depending
on the Internet bandwidth. This step will only be executed the rst time the
Cable is connected to the PC, after this the PC will automatically recognize
the Serial Cable;
5. Connect the G650i;
6. Place the Hard Lock in the Serial Port of G650i;
7. Select the “Conguration” function and depress YES;
8. Select the “5.7 Uploading Internet Equation” function;
9. Remove the Hard Lock and connect the Cable in the Serial Port of G650i;
10. Access the website
www.moisturetester.com.br and click on the “Moisture Meter”.
11. From now on, follow the instructions shown in the PC, which assumes the
control of G650i . All the operations stated in the site may be performed.
12. Register your G650i, this will bring many advantages.
Moisture Meter G650i I 27
This function shall be only used in case of occurring some fault in the download of Internet
curves of G650i . In this function, the standard equations built into the G650i will be uploaded,
and they may not be the most updated. Moreover, there is no way to select them, so all the
equations will be uploaded.
The equations undergo updates with time, and we strongly recommend that an Internet
connection be made in order to download the most updated curves.
To upload standard equations:
1. Connect the G650i;
2. Go to “Conguration” and depress YES; do not forget to put the Hard Lock in the
serial output;
3. Go to “5.8 Uploading standard equation” function, depress “YES”, a new message
will show up indicating the upload of products in the memory:
4. The system automatically completes this function.
Programing...
Product: 65
5.8. Uploading standard equation
How to exit “5.8 Uploading Internet Equation” function
This function passes the control of the G650i processor to the computer to which it is
connected. Once having entered in this function, we have only two alternatives to exit:
A. Exit with the site commands;
B. Disconnecting, waiting for 5 seconds, and connecting again the power
supply to G650i.
28 I Moisture Meter G650i
Makes a self-diagnosis of G650i, and issues a report with all data. The report will be sent to
serial output RS232 or to the thermal printer connected to G650i serial port.
To get the report:
1. Connect the G650i;
2. Go to “Conguration” and depress YES; do not forget to put the Hard Lock in the
serial output;
3. Go to “5.9 Self-report” function as depress YES;
4. On the screen several information will show up related to G650i self-report, at the
end we will have the message below stating the report printing:
5. Wait for the report to be printed;
This report provides the Service with data for assessing whether the G650i is operating
properly, after having passed through the self-diagnosis when it is connected.
Note that there are two groups of information, the rst one indicates the G650i operation,
the second one the Products that are available in G650i with the Calibration Curve Version
and the minimum and maximum moisture values.
Wait, issuing
R e p o r t...
5.9. Self-report
Moisture Meter G650i I 29
Below there is an example of reports and the expected values for each item with its respective
tolerance:
30 I Moisture Meter G650i
Selects the language used by G650i.
Available languages in this version: Portuguese, Spanish, English, French, German and Italian.
To select language proceed as follows:
1. Connect the G650i;
2. Go to “Conguration” function and depress YES; do not forget to put the Hard Lock
in the serial output;
3. Go to “5.10 Language selection” function, and depress YES;
4. Use the Right hand/Left hand ARROWS to select the required language;
5. Depress YES to complete;
English
< Select >
5.10. Language selection
5.11. Auto shuto
Switches on/o the Battery economy mode. When it is activated, it switches o the G650i
after 5 minutes without the keypad being operated, thus saving Battery charge. The factory
default setting is with the function activated.
To select proceed as follows:
1. Connect the G650i;
Moisture Meter G650i I 31
2. Go to “Conguration” function and depress YES; do not forget to put the Hard Lock
in the serial output;
3. Go to “5.11 Auto shuto” function and depress YES;
4. Use the Right hand/Left hand ARROWS to select the required mode;
5. Depress YES to complete;
Off
> On 5 min.
Set up the printer or the PC with which the G650i is connected with the following
congurations:
Serial RS232C Protocol:
Baud Rate 4800 bps
Bits 8 Bits
Parity None
Stop Bit 1 bit
This information shall be used to program the peripheral, PC or printer that is connected
to G650i.
In case G650i is not transmitting data and the PC is not receiving the information, observe
the following items in your PC:
RS232 Serial Port
32 I Moisture Meter G650i
1. Verify whether the system is selected to the COM port that is connected to G650i.
2. Verify whether the conguration of the PC Serial PORT is in accordance with the
above indicated Protocol;
3. Verify the cable pin conguration:
DB9
Female
1
2
3
4
5
6
7
8
9
DB9
Female
N/C
2
3
4
5
N/C
7
N/C
N/C
Function
-
RxD
TxD
DTR
GND
-
RTS
-
-
4. Contact Gehaka Service Department.
5. Illustration of DB9 Connector pins, arrow indicates pin 1:
Pin 1
Moisture Meter G650i I 33
Always use an Alkaline battery, since this type of battery does not leak chemical
compounds over the years. Dispose the battery in a suitable way, because it is harmful to
the environment.
The battery is installed in the meter bottom (right-hand foot) and to replace it follow the
steps below:
When we switch the adapter connector o the mains, the G650i will continuously operate
on the battery for a period of nearly 20 hours. In order to save battery, enable the “AUTO
SWITCH OFF” function, then after 5 minutes without operation the G650i will automatically
switch o.
If the battery voltage drops below the safety limit that ensures the proper operation of
the device, the display will show the message “Replace Battery” and will stop performing
measurements, thus indicating the need of battery replacement.
Battery replacement
Remove G650i from the mains
Remove the power cord from the meter
Remove the meter discharge drawer
Backward lie down the device in order to access
the bottom
Remove the two screws from the right-hand side
Remove the battery releasing it from the clip
Install the new battery
Put the screws backs
1.
2.
3.
4.
5.
6.
7.
8.
34 I Moisture Meter G650i
It should be noted that the display backlight only works when the G650i is connected to
the Mains Adapter, in order to save battery energy.
Moisture Meter G650i I 35
Routine maintenance will basically consist on
cleaning the moisture meter, keeping it free
from dirt and dust, specially the Chamber. When
measuring products such as rough rice, brans,
etc., the Chamber tends to accumulate residues,
especially when such cereals are very dry with a
low relative humidity.
Never use compressed air for cleaning the
chamber. Use a dry soft brush or paintbrush.
To clean the Chamber proceed as follows:
The Chamber cleaning may be performed using
a soft bristle brush or paintbrush. Do not use
liquids. Before performing the cleaning, the
Chamber Door shall be carefully opened.
To open the door and performing the cleaning,
proceed as follows:
1. Remove the Adapter from the rear
panel and switch it o;
2. Lie down the G650i as shown in the picture;
3. Open the Chamber door with the chamber Knob;
4. Carefully perform the Chamber cleaning;
5. Connect the G650i again for operation.
For the G650i external cleaning use a cloth dampened with water.
Cleaning
36 I Moisture Meter G650i
Electronic components
Causes of electronic failures are minimized, since the moisture meter uses solid-state
electronic components. The electronic circuitry is contained in a printed circuit board
located inside the instrument panel. Its operation is not aected by dust and the
microprocessor is able to detect any failure showing an error message on the display. In
case of any failure, we recommend to return the G650i to Gehaka for the required meter
repair and adjustment work.
Do not forget that any time the G650i is connected, the microcontroller performs a Self-
Diagnosis that ensures its proper operation.
Moisture Meter G650i I 37
Error 1 – Obstructed Chamber
An amount of sample or impurities could have been retained in the chamber, and with
this exceeding the self-adjustment limits of the Chamber. Remove the drawer, use “5.6
Unlocking Chamber Door” function, disconnect G650i from the mains, turn the device
backwards and open the chamber door, using a brush or paintbrush clean the chamber.
See the proper procedure in “Cleaning”.
If the error persists, there was a failure in the instrument; send the instrument to Gehaka
Service Department.
Error 2 – Scale Failure
The electronic scale is not operating properly. This message indicates there was a failure in
the G650i electronic scale. Observe whether there is some grain retained into the Loading
Hopper edge, and whether the Hopper is totally free from the Hopper Protection.
If the error persists, there was a failure in the instrument; send the instrument to Gehaka
Service Department.
Error 3 – Low Sample Temp.!
Error 4 – High Sample Temp.!
Indicates that the SAMPLE temperature is either below 0 ºC or above 50 ºC.
Wait until the sample temperature is balanced with the room temperature before
performing the measurement.
If the error persists, there was a failure in the instrument; send the instrument to Gehaka
Service Department.
Error 5 – Low Instrum. Temp.!
Error 6 – High Instrum. Temp.!
Indicates that the INSTRUMENT temperature is either below 0 ºC or above 50 ºC.
This is a protection for the good performance of G650i electronics. Operate the instrument
in a room temperature between the allowed ranges.
Error messages
38 I Moisture Meter G650i
If the error persists, there was a failure in the instrument; send the instrument to Gehaka
Service Department.
Error 7 - Delta Temp. > 15 ºC
This error indicates that the temperature dierence between the instrument and the
sample is greater than 15 ºC. Wait for some minutes with the sample in the G650i drawer
so this dierence stays below 15 ºC. It is recommended that the sample temperature and
instrument temperature shall be as close as possible, whenever possible.
If the error persists, there was a failure in the instrument; send the instrument to Gehaka
Service Department.
Error 8 – Low Sample Weight!
Error 9 – High Sample Weight!
After having the sample weight within the limits, a nal verication is made after loading;
if the amount of sample used is outside the limits that G650i is able to correct, this sample
will be unloaded. Increase or reduce the amount of sample to correct the error.
If the error persists, there was a failure in the instrument; send the instrument to Gehaka
Service Department.
Erro 10 - Umid. Amostra Baixa!
Erro 11 - Umid. Amostra Alta!
The G650i was calibrated using the standard oven method, and its precision is ensured in
the range where the tests and the adjustment were performed. When the measurement
is out of this range, the G650i will display this message. If the measurement is actually
out of the scale range, we recommend creating a new Equation using the resources in the
website
www.moisturetester.com.br. See item “5.8 Uploading Internet equation” for more
details of the procedure.
Error 12 - Access Locked!
This message is displayed when we attempt to enter the “Conguration” function without
the Hard Lock key that releases the access to that function. This key shall be installed in the
G650i serial output. It is the security resource to prevent G650i parameters from being
inadvertently changed.
Moisture Meter G650i I 39
Error 50 - MEM C Call Service
Error 51 - MEM D Call Service
Error 52 - RTC Call Service
Error 53 - TRIM Call Service
Error 54 - A/D Call Service
Error ?? - Call Service
When G650i is connected, it performs a self-diagnosis, ensuring the equipment will make
reliable measurements.
In addition to this test, a verication will be also made at each measurement, and, if errors
were found, the above stated messages will be issued.
These messages indicate a G650i hardware fault, and makes its operation impossible, send
the instrument to Gehaka Service Department.
40 I Moisture Meter G650i
Ice or Snow
Samples containing ice or snow will not be satisfactorily measured. Frozen samples may
be analyzed provided they are left to heat up in a hermetically closed container to get
them closer to room temperature. Use the average value of 3 or more readings. Below the
temperature range of 5 ºC, perform 3 readings and use the average value.
Surface Moisture
Grains obtained from a warmed warehouse when getting in touch with humid air develop
a surface moisture. The same occurs with some cereals uncovered during a rainfall, which
will keep surface moisture for some days unless an articial heat is applied for drying them.
Surface moisture presents very low impedance to the high-frequency current ow, thus
incorrect readings will be obtained.
Moisture Measurement Processes
There are two methods for measuring moisture in cereals: the primary one and the
secondary one. The primary method consists on a procedure using the vented oven. This
procedure is time-consuming and would not obviously be convenient for use on grain
reception. For this reason, the secondary method was developed, so that using the cereal
electrical properties, quick measurements can be made.
Although research works and technological developments have been carried out in the
eld of electronics and also on the properties of cereals, it is not possible to analyze the
cereal without some variation. Some of the involved facts are discussed below.
We recommend that the product to be measured in the G650i shall be clean and free from
any impurities that could interfere in the moisture measurement. We should consider that,
during the instrument calibration process with the oven, it was always used the product
clean.
Unfortunately, a cereal cannot be measured until the harvest is completed and the
calibration cannot be modied until the measurement of a sucient number of samples,
in order to be able to determine the change in the cereal electrical properties.
Extreme conditions
Moisture Meter G650i I 41
The size of the seed does also aect the test quality. Corn is an example of a dicult cereal
to be measured, due to the irregular size and shape of the seed. In fact, there are nearly
400 dierent varieties, maturing in 90 to 125 days. It is evident that, the issue of precision in
moisture measurement is the on-going increase in the variation of the electrical properties.
Cereal moisture measurement is signicantly aected in its accuracy by moisture and
temperature range, cereal density, low temperature, mold or swelling. Moisture meters
are calibrated with quality grain seeds, and certain attempts of measuring electrical
properties on crushed or broken grains, or on grains with a high content of foreign matter,
will certainly impair the results.
We do not only have dierent cereals, such as wheat, barley, corn, soybean, rice and others,
but we also have a number of variations of each type of cereal. Each cereal creates its own
problem for moisture measurement. With new eorts, new hybrid cereals are developed
and the electrical properties of these cereals may slightly change, as for example, the grain
density measurement.
Dierent regions of the country, dierent methods of cultivation under development, and
the soils have to be taken into consideration when trying to obtain average values for
calibrating a moisture meter to be used throughout the country.
In the operation of every moisture meter, the duly specied operations shall be performed.
A representative sample of the batch shall be collected, and the moisture and temperature
range shall be observed. The moisture meter shall be checked at least annually to ensure
the reliability of results.
We encourage your involvement in the development of calibrations, and we ask you
to contribute to our work by supplying samples or goods with the calibration under
development. Gehaka oers a specic laboratory for moisture measurement and, with
these results it is possible to improve the performance of moisture meters.
42 I Moisture Meter G650i
Technical specications
Moisture Meter G650i I 43
Standard Products in this version and operating ranges for each Product:
44 I Moisture Meter G650i
The information in this manual is regarded correct until the date of its publication, as
stated in the sales invoice of the product.
Gehaka will not assume any liability resulting from the improper use or misuse of this
product, and also assumes no liability for non-observance of the information stated in this
manual, and it reserves the right to modify it without previous notice.
Gehaka refuses any direct or indirect liability for accidents, damages, loss and prots, good
or bad results on analyses, processing, purchase or sale of goods based on this instrument.
The devices sold are guaranteed against failures of material or craftsmanship, for a period
of one year from the date of manufacture or sale.
The responsibility of Gehaka under this warranty is limited to the repair or replacement, or
optional credit granted, of any products returned by the user/buyer during the warranty
period.
This warranty does extend to the coverage of damages or malfunction caused by re,
accident, modication, carelessness, improper use, repair or maintenance without
authorization of the manufacturer, or even by negligence, malpractice and imprudence
in the use.
Gehaka does not expressly or implicitly assumes any liability, except hereby notied.
Gehaka does not guarantee the continuity of merchantability of this product, or its
suitability for a given purpose.
The responsibility of Gehaka is limited to the unit sales price, as stated in the sales invoice
or price schedule, of any defective good, and it will not include the repair of losses and
other material and/or moral damages, prot loss or any other consequential damages
arising from the use of the equipment, other than those previously provided.
Warranty
The warranty validity of this product is one year, starting from the date of the invoice
issued. However, the guarantee period for the painting is thirty days, starting from the
date of the invoice issued.
The product requiring service during the warranty period shall have the freight to Gehaka
and return to customer paid by the Customer.
Gehaka’s salespersons or sales representatives are not authorized to oer any additional
warranty other to that described in this Manual.
Annotations
Ind. e Com. Eletro Eletrônica Gehaka Ltda.
Av. Duquesa de Goiás, 235 - 05686-900
São Paulo - SP - Brazil
Phone: +55 11 2165 1100
sales@gehaka.com.br
www.gehaka.com.br
Agricultural Equipment Line
Portable Grain Moisture Tester G600i
Portable Grain Moisture and Impurity Analyzer G650i
Bench Grain Moisture Meter G810
Bench Grain Moisture Meter G939
CA 50 Moisture Tester
IV2500 Infrared Moisture Analyzer
IV3100 Infrared Moisture Analyzer
BK Semi Analytical Balance
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