Gehaka G650i User manual

User manual
Moisture Meter G650i
Version: 1.00.000
Date: 06/20/2014

Summary
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G650i installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagram of the functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1. Measuring – moisture measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2. Percentage (impurities) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3. Approximate density (hectoliter weight) . . . . . . . . . . . . . . . . . . . . . . . . . . .
4. Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5. Conguration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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 specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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4I Moisture Meter G650i
The G650imoisture meter includes all the characteristics to provide the most accurate
grain moisture reading.
With a simple operation and without operator intervention, model G650iwill 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, G650iprovides 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 identied 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.
G650iincludes 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 G650itemperature 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 G650iI 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 G650iweighing 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.
G650ihas also a bidirectional RS232C serial communication port.
With this, we can connect the G650ito 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 G650iis 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.

6I 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
Conrms 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
Displaysthepreviousfunctionordecreasesthevalue
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 G650iI 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 “Conguration” function, where G650i
congurations 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.

8I 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 G650ion 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, G650iwill start its operation, performing a self-diagnosis
in order to check whether its components are working properly. If, by any chance, the
instrument veries that some of its components is improperly operating, it will indicate an
error message on the display regarding the fault.
The G650ican 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 G650iis 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, G650istops operating.
Function “4. Battery” indicates battery voltage in addition of its status in a percentage
gure.
The G650ishall be operated in a place free of excessive dust and with room temperature
between 0 º and 40 ºC.
G650i installation

Moisture Meter G650iI 9
A diagram follows indicating all G650ifunctions 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 conrm;
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 G650imeter
is able to make the reading. Depress “YES” to conrm 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 G650imeter will display the value of product moisture.
If the Right hand/Left hand keys are depressed, the G650imeter will display all
the measurements made, namely:
When selecting Right hand/Left hand Arrow we have:
-> Sequence number of the measured sample.
WHEAT
Moist.: 13.09%
Te m p.: 2 4.8 C
Sample: 21

Moisture Meter G650iI 11
6. After having performed a successful measurement, the G650imeter 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 dierence between the product and
the G650iChamber, 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 G650imeter 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 conguration 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 G650imeter 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 G650iwill indicate their
percentage.
10.0 g
4.0 %
2. Percentage (impurities)

Moisture Meter G650iI 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 (specic 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
overows the cup. The overow 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 G650iI 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 G650iI 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 eect 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. Conguration
The “Conguration” mode oers the possibility to make settings or congurations in the
G650imeter. Now, we will describe each one of these functions.
The “Conguration” mode oers the possibility
to make settings or congurations 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
G650iMenu, 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
G650iSerial 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.
G650iis 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 G650imeter is
disconnected from the power outlet.
This battery lasts for over 5 years; to have it tested, just disconnect the G650imeter 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 “Conguration” 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
“Conguration” function, there is not a new checking.
When you exit the function, it will be locked again.
G650isettings and Equations can only be changed
with the presence of the Hard Lock key, this ensures
improved security.

Moisture Meter G650iI 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 G650iwill 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 “Conguration” 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 “Conguration” 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 > +