Gram FH 100 User manual

SERIES
FH
100 / 200 / 2000 / 6000
OPERATION MANUAL

2
INDEX English
Safety information 4
Installation 4
Preparatory before using 5
Storage 5
Unfolding the package 5
Package list 6
Installation of the balance 6
Usage Conditions 6
Install the balance with wind shield 7
Install the balance with round weighing pan 7
Connect the Power Adapter 7
Install the External Facilities 7
Warm-up Time 7
Adjust the Level Gauge Purpose 8
Display and keys description 8
Calibration 10
Procedure 10
Basic weighing 11
Counting mode 11
Percent deviation 12
Weighing units 13
Enabling weighing units 13
User setups 16
Print setups 16
Setting the baud rate 17
Restoring the factory default setup 18
Communication with a computer 18
RS-232 Interface hardware 19

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Pin description 20
Routine maintenance and troubleshooting 20
Troubleshooting 20
Clearance 21
Clearing the stainless steel surface 21
Safety check 22
Troubleshooting 22
Technical conditions 24
Guarantee 25

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ENGLISH
SAFETY INFORMATION
To avoid unnecessary demage to the balance, please pay attention to the
following tips:
• Please do not use this balance in dangerous área.
• Only the trained technicians could operate this balance.
• Please turn off the power of the balance before connect it or disconnect
it with other facilities.
• If the environment requires a higher safety standard, please follow the
relevant installation instructions.
• Excessive electromagnetic interference will make the displayed value
in this balance change. Once the interference is dismissed, the balance
could operate in normal way.
• Please avoid any liquid on the surface of the balance. A piece of lightly
damp cloth is allowed to wipe the balance.
INSTALLATION
• Please make sure the local voltage is in line with the rated voltage on
the name board.
• Please pay special attention when use RS-232 as the pins location
might be incompatible with our facilities. Please check the pins
locations before the connection and turn off the connection of different
configuration.

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• If the facility or the power cord has apparent damage, please turn off
the power, put it or them in a safe place and do not use it or them
before they are fixed.
• This balance could only be connected to our accessories or optional
fittings. We are not responsible for any modification the operator
makes to our balance, including using the facilities and cable which are
not supplied by us. However, we are always ready to offer the operation
norms information.
• Please do not open the balance. If the guarantee lable is damaged, our
quality guarantee will automatically cease being effective.
• If the balance does not work well, please contact your local distributor
or our customer service center.
PREPARATORY BEFORE USING
STORAGE
This balance requires an environment which is free from excessive high or
low temperature, corrosive, vibration, air current and collision.
Unfolding the package
• Unfold the package and check if there is any outer damage of the
balance.
• If there is outer damage, please refer to section routain maintenance
and troubleshooting.
• Please keep all the package for possible transportation in the

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future. When pack the balance, please remove all the cables to avoid
unnecessary damage.
Package list
• The balance.
• Weighing pan.
• Pan support.
• Power adapter.
• User manual.
INSTALLATION OF THE BALANCE
Put it in a proper place, please avoid the following situations:
• Much heat and direct sunlight.
• Air currents and vibrations.
• Excessive moisture.
Usage Conditions
Please do not lay the balance in a quite damp palce for a long time. If the
balance is transferred from a lower temperature environment to a higher
temperature environment, please lay it there with power off foraround 2 hours.

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Install the balance with wind shield
• Assemble the parts in the
indicated order.
1
2
4
3
2
1
Install the balance with round weighing pan
• Installation Sequence.
• Pan support.
• Weighing pan.
Connect the Power Adapter
Only the power adapter offered by us is allowed.
• Connect the power adapter to the balance.
• Connect the power adapter to the power socket.
Install the External Facilities
Turn off the balance before connect it or disconnectit with external facilities
such as the printer or the computer).
Warm-up Time
To assure the measure accuracy, the balance must be warmed up for 30
minutes before normal operation.

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Adjust the Level Gauge Purpose
• Adjust the level guage of the balance. The
level guage needs to be adjusted once its
place is changed. The two front bottom bolts
are used to adjust the level guage.
• Spin the two bolts as shown in the figure until
the bubble in the level gauge is in the ceter of
the circle.
• Normally, it needs to be adjusted repeatedly.
L
R
R
R
L
L
DISPLAY AND KEYS DESCRIPTION
1
3
4
2
1. Count sign.
2. Weighing units.
3. Stability sign.
4. Level gauge.
OK - Reading shown is stable
g - Reading shown is given in grams

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OZ - Reading shown is given in ounces (1g = 0.03527396200 oz)
ct - Reading shown is given in carats (1g = 5.0000000000 ct)
dwt - Reading shown is given in pennyweight (1g = 0.64301493100 dwt)
% - Reading shown is given in percent weight
PCS - Reading shown is given in as a counting
------- The balance is developing a stable reading
UNABLE – Error operation
HHHHH – The weight on the pan excedes the capacity of the balance
LLLLLL – The pan is not properly seated or has been removed
Calibration / Adjustment key
Print / Output key
Count / Function confirmation key
Percentage key
Unit conversion key
Tare key

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CALIBRATION
To decide the accuracy of the balance through test the difference between
thereading and the actual weight of the object on the weighing pan.
Prerequisite of calibration:
1. There is no loading on the weighing pan.
2. Press the key.
3. The interior signals are stable.
Procedure
1. Adjust the level guage and warm it up for 25 minutes.
2. Press the key.
3. Press the key, the display will read its full range, such as 3000.
4. Press the key repeatedly, it reads the calibration point within the
range (such as 2000, 1000…).
5. Choose one calibration point and place the right weight on the pan. Press
the key, the display will show CAL---.
6. When the external calibration is finished, the balance reads the value of
the weight on the pan (such as 3000).

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BASIC WEIGHING
Procedure
1. Plug in the power, the balance will automatically proceed system
initialization and deduct the tare weight.
2. Place the container on the weighing pan.
3. Press the key.
4. Place the simple object in the container.
5. Print the weight value pressing the key.
COUNTING MODE
Displayed sign: PCS
Procedure
1. Place the empty container on the weighing pan.
2. Press the key.
3. Choose the amount of the reference samples. Press the key, the
balance reads “qTy10”, press the key, choose the number of
samples (10, 25, 50, 100). The bigger number, the more accurate for the
counting results.The choosed reference number will be saved until a
new reference number is set or the power is off.
4. Place the right samples on the weighing pan or in the container.
5. Press key, the balance reads the amount number of the samples.

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6. Add the rest of ítems, the balance will show the total pieces.
7. If you want print the result, press the key.
8. To return to normal weighing mode, press the key, the symbol PCS
disappears.
PERCENT DEVIATION
Displayed sign: %
Procedure
1. Press the key.
2. Put the reference object on the weighing pan. When the reading is stable,
press the key, it reads “100.000” or “100.00”, which relates to the
accuracy 100.00% of the balance. Meanwhile, it displays “%”.
3. Remove the reference object, the balance Reads “0.000” or “0.00”.
4. Place the goal object on the weighing pan.
5. Wait for the OK on the display, read the display, the display indicates
percent deviation from the reference.
6. Press the key, the balance returns to normal weighing mode.
To test the percentage a weight in a container varies from a reference, please
follow the below steps:
1. Put an empty container on the weighing pan. Press the key.
2. Place the standard object into the container.

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3. Press the key. Wait for the stable display, it reads “100.000” or
“100.00”.
4. Remove the container with standard object. Put another same
container on the weighing pan, wait for the stable display, it reads
“0.000” or “0.00”.
5. Add the goal object in the container, wait for tyhe stable display, the
value displayed is the percentage the weight of the goal object varies
from the standard weight.
6. Press the key to return to normal weighing mode.
7. If necessary, the weight of the goal object could be printed out.
WEIGHING UNITS
1. Press the key to select the desired unit weight (g, oz, dwt) or
weighing mode (normal weighing, counting or percentage mode).
Enabling weighing units
The units function can be programmed to turn certain weighing units on or off.
To enable or disable certain units of measure, perform the following procedure.
1. Press the key while pressing key, the balance reads “PrInT”.
2. Press the key repeatedly until it reads “unIT”.
3. Press the key, the display reads “g yes” which means g available for use.
Press the key to confirm. To disable “g” as the unit, press the
key, then the display reads “g no”, press the key to confirm.
4. Follow the steps above to enable or disable Oz, Ct or dwt as the unit of measure.

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15

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USER SETUPS
The balance could be set up to meet individual requirement.
1. Press the key while pressing the key to enter to setup program.
2. Press the key to choose the ítem to be set up, then press to confirm.
3. Anytime to exit the setup program, press the key, it reads “ESC”,
then press the to confirm.
PRINT SETUPS
There are three print types:
STABLE Print: print a stable reading when it is attained.
INSTANT Print: print immediately after press the key.
INTERVAL Print: print at predeterminated time intervals.
Note: The print function is separate from the line feed setup, i.e set the print
function first then set the number of line feeds.
To set the print type, use the following procedure:
1. Press the key while pressing the key, the display will show “PrInt”.
2. Press the key, the display will show “STAbLE”, which indicates
stable print as the default.
3. Press the key to choose the print type and confirm pressing the .
4. Press the key until the display reads “InTEr”, press the key, the
display will show “SEC”.

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5. Press the key repeatedly to see the predeterminated time interval and
press the to confirm. The message “0 SEC” means countinous print.
6. Press the key to return to weighing mode.
7. After entering print setup, press the key repeatedly to see
predetermined line foods (1-18) Choose the proper line feeds, press the
to return to normal weighing mode.
SETTING THE BAUD RATE
1. Press the key while pressing the key, the display will show “PrInT”.
2. Press the key, the balance reads “bAud”.
3. Press the key, the balance reads “300”.
4. Press the key repeatedly, the balance display the other baud rates.
Choose the proper rate and press key to confirm. The balance reads
“ParITy” and begins parity check.
5. Press the key, the balance reads “nOnE” (no check) for the first.
6. Press the key, it reads the other check types; “Odd” indicates odd
check and “EvEn” indicates even check.
7. Choose the proper check type and press the key to confirm, the
balance now returns to normal weighing mode.

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RESTORING THE FACTORY DEFAULT SETUP
1. Press the key while pressing the key the display will show
“PrInT”.
2. Press the key repeatedly until it reads “InITIA”.
3. Press the key to confirm, the display reads “BUSY” and the returns
to weighing mode. Factory default setup is finished.
COMMUNICATION WITH A COMPUTER
The balance keyboard functions can be accessed via the RS-232 interface.
The following commands are available:
U – :units conversion
T – : tare function
C – : calibration with external standard weight
P – : print function
% - : percent function
# - : instant print
M – : counting function
When a balance is connected to a computer, it is suggested that immediate
print # be used. In response to this command the balance will transmit
whatever number or message appears on the balance display.
The string format output is shown below:

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A B C D E F G H I J K L M
A - +/-: Signs field, usually no display as a space when it is a positive
number, “-” is displayed when it is a negative number.
B – G: Number and decimal field, spaces are used when there are less
than six digits.
H – I: Spaces fields.
J: Unit field, it describes the units of the number being transmitted. Your
balance will transmit Gfor grams, Ofor ounces and Cfor carats.
K: Stable character, it corresponds to the OK indicator on the display. S
means the reading is stable, space means the reading is not stable.
L: Return character.
M: Line feeds character, it indicates the line feeds.
RS-232 INTERFACE HARDWARE
This balance adopts the transmit and receive lines of standard RS-232.
The data format is:
1 start bit.
8 data bits include parity.
1 stop bit.
The instruction to connect the balance to external device is as follows:

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
Pin description
2 – TXD - - - scale transmits data
3 – RXD - - - scale receives data
5 – GRD - - - signal ground
Note: “Handshake” signals, such as “clear to send” (CTS) are not used. The
peripheral must have a mínimum buffer (15 characters).
It is suggested that the máximum recommended cable lenght is 15 meters,
the load impedance of the device connected should be between 3000 and
7000 ohms with no more than 2500 pf shunt capacitance.
ROUTINE MAINTENANCE AND TROUBLESHOOTING
Troubleshooting
Only the trained professionals are allowed to do repair work. There is a risk
for the user if non-professionals do the repair.