Lutron Electronics GM-610P User manual

600 g x 0.01 g
DIGITAL BALANCE
Model : GM-610P
Your purchase of this DIGITAL BALANCE marks a step forward
for you into the field of precision measurement. Although this
DIGITAL BALANCE is a complex and delicate instrument, its
durable structure developed. Please read the following
instructions carefully and always keep this manual within easy
reach.
OPERATION MANUAL

TABLE OF CONTENTS
1. FEATURES. .................................................................1
2. SPECIFICATIONS. .......................................................1
3. FRONT PANEL DESCRIPTION. .......................................3
3-1 Platform. .............................................................3
3-2 Level Bubble. .......................................................3
3-3 CAL. Button ( function A Button ). ......................... 3
3-4 Tare Button ( function B Button ). ......................... 3
3-5 Display. ...............................................................3
3-6 Power Switch. ......................................................3
3-7 Rubber Pads. .......................................................3
3-8 Battery Cover/Compartment..................................3
3-9 DC 9V Receptacle................................................. 3
3-10 RS232 Output Socket...........................................3
3-11 Unit Switch. ........................................................3
4. PLATFORM INSTALLATION. ......................................... 4
5. WEIGHT MEASURING PROCEDURE. ...............................5
6. SELF-CALIBRATION. .....................................................6
7. COUNTING SCALE OPERATION PROCEDURE.................8
8. BATTERY REPLACEMENT. ............................................10
9. DC 9V AC/DC ADAPTER OPERATION. ...........................10
10. RS232 PC SERIAL INTERFACE....................................10

1
1. FEATURES
* Microprocessor circuit with high accuracy & better
performance.
* Wide measuring capacity : 600 g x 0.01 g.
* 0.01 g & 0.0005 oz resolution & wide measuring
capacity.
* Large LCD display, 20.9 mm ( 0.8" ) digit size, easy read
out.
* Gram or oz measurement, select by the internal slide
switch.
* Built-in self calibration system, the calibration value
can memorize into EEPROM circuit permanently even
power off.
* High precision counting scale function.
* RS-232 computer interface.
* Accept battery or AC/DC adapter power source, two
way power supply.
* Built-in " level bubble " & the adjustable " rubber pads ".
* Heavy duty ABS housing plastic case.
2. SPECIFICATIONS
Display
LCD, 20.9 mm ( 0.8" ) digit size, 5 digits
with annunciator.
Measuring range
and
Resolution
Unit
Range
Resolution
g
0.10 g to 600 g
0.01 g.
oz
0.005 oz to 9.9995 oz
0.0005 oz
10.000 oz to 21.164 oz
0.001 oz
Min. Display
Weight
g
0.10 g
oz
0.005 oz
Unit Select
g or oz, select by internal slide switch.

2
Accuracy
± ( 0.05 % + 0.04 g )
* Within two hours after self calibration
be executed.
* 23± 5
℃ .
* Spec. tested under the environment RF
Field Strength less than 3 V/M &
frequency less than the 30 MHz only.
Sampling time
Approx. 1 second.
Tare Control
Approx. 600 g max.
Transducer
Load cell.
Circuit
Microprocessor circuit.
Counting function Sampling no. are 10 PCs, 20 PCs, 50 PCs
or 100 PCs.
Auto Calibration
Use 200 g or 400 g standard weight to
execute self-calibration automatically.
Data Output RS 232/USB PC computer interface.
*
Connect the optional RS232 cable
UPCB-02 will get the RS232 plug.
*
Connect the optional USB cable
USB-01 will get the USB plug.
Operating
Temperature
0 to 50 ℃( 32 to 122 ℉).
Operating Humidity
Less than 80% RH.
Size
Cabinet
250 x 190 x 70 mm
Platform
Round, 120 mm Dia.
Weight
1000 g/ 2,2 LB. * not include batteries.
Power Supply 1.5V AA (UM-3) battery x 6 PCs,
or DC 9V adapter, optional.
Power
Consumption
Approx. DC 17 mA.
Accessory Included
Operation Manual........1 PC.
Optional
accessories
* Software ( Windows version ),
SW-U801-WIN, SW-E802.
* RS232 cable, UPCB-02.
* USB cable, USB-01
* 200 g calibration weight, WT-200
* AC/DC 9V power adapter, AP-9VA

3
Side view
Bottom view
3. FRONT PANEL DESCRIPTION
Fig. 1
Back view
Front view

4
3-1 Platform
3-2 Level Bubble
3-3 CAL. Button ( function A Button )
3-4 Tare Button ( function B Button )
3-5 Display
3-6 Power Switch
3-7 Rubber Pads
3-8 Battery Cover/Compartment
3-9 DC 9V Receptacle
3-10 RS232 Output Socket
3-11 Unit Switch
4. PLATFORM INSTALLATION
Fig. 2

5
5. WEIGHT MEASURING PROCEDURE
As intend to let the balance under the best
operation condition, it recommend to warm up
the balance at least 30 minutes before make the
operation.
1) Place the balance on a flat hard surface.
Adjust the " Rubber Pad " ( 3-7, Fig. 1 ) until the water
bubble of the " Level Bubble " ( 3-2, Fig. 1 ) on the
center position, then the scale already install under the
horizontal position completely.
2) Set the "g" or "oz" unit by slide the " Unit Switch "(
3-11, Fig. 1 ).
* The scale are set to the " g " unit typically.
* Use the "-" type screw driver to slide the " Unit Switch ".
* Slide the " Unit Switch " to the right position will set to
" gram " unit & the right down corner of LCD will show the
" g " marker.
* Slide the " Unit Switch " to the left position will set to
" oz " unit.
3) Turn the " Power Switch " ( 3-6, Fig. 1 ) to the " On "
position.
1 = On, 0 = Off
The " Display " ( 3-5, Fig. 1 ) will show " 8.8.8.8.8 "
for a few seconds, then " 0 " value ( 0.00 g for gram
function, 0.0000 for oz function ) will be present.
4) Apply the load to the platform gently, display will show
the measuring weight values.
* Do not exceed the over load capacity of the scale.
* Over weighting, the display will show " ----------".

6
5) Tare function :
After weighting the first item, press " Tare Button " ( 3-4,
Fig. 1 ), scale will reset to zero values automatically.
At the same time, the LCD display will show the " TARE "
mark. Place next weighted item onto scale. Scale will
give weights of the second only.
Consideration of tare function
* If the display show minus weight or show " _______"
means the display reading is under the zero, then
tare function should be executed.
* Before measuring the weight, If the display is not
zero & show some value, it means the internal circuit
is over the zero, then tare function should be
executed.
* The max. tare capacity is approx. 600 g.
* The " Tare " marker will disappear until power off
and power on again.
6. SELF-CALIBRATION
1) Please prepare the following optional " Standard Weight " :
200 gram standard weight (WT-200, optional).
or 400 gram standard weight.
2) Calibration under the 400 gram standard weight
a) Power on the scale until the display show zero value.
Apply the 400 gram standard weight to the center of
the platform gently. If the scale is not accurate, then
may show the weight value around 400 g ( for
example 399.93 g , 400.06 g. .. )
b) Step 1 :
Press the " CAL. Button " ( 3-3, Fig. 1 ) once,
display will show the value of " 200.00 g "
Step 2 :
Following press the " Tare Button " ( 3-4, Fig. 1 ) once,
display will show the value of " 400.00 g "

7
Step 3 :
Press the " CAL. Button " ( 3-3, Fig. 1 ) once again,
display value of " 400.00 g " will flash 6 times, then
the calibration procedures are finished completely &
balance is ready for the measurement accurately.
3) Calibration under the 200 gram standard weight
a) Power on the scale until the display show zero value.
Apply the 200 gram standard to the center of the
platform gently. If the scale is not accurate, then may
show the weight value around 200 g ( for example
199.94 g , 200.05 g.... )
b) Step 1 :
Press the " CAL. Button " ( 3-3, Fig. 1 ) once,
display will show the value of " 200.00 g "
Step 2 :
Press the " CAL Button " ( 3-3, Fig. 1 ) once again,
display value of " 200.00 g " will flash 6 times, then the
calibration procedures are finished completely & balance
is ready for the measurement accurately.
Consideration of Self-Calibration :
* The internal Self-Calibration value is saved to the
internal EEPROM circuit permanently. Once power off then
power on, the calibration value will be not disappeared .
* After make the self calibration, measure the 200 g or 400 g
standard weight again, if the display value existing few
counts deviation, it is normal. However within few hours,
the balance will be kept under a high accuracy condition.
Those accuracy will be even better than the published
specification ( refer page 2 ).
* Under the status of " oz " unit, still can use the weight of
200 g or 400 g to make the calibration. However the " g "
marker will disappear.

8
1) Prepare a lot of counting sample units. The no. of
counting sample will be 10 PCs, 20 PCs, 50 PCs or 100
PCs.
The more PCs of counting sample will be better.
* No load to put on the platform.
2) Use the finger to hold the " CAL. Button ( function A
Button ) " ( 3-3, Fig. 1 ), at the same time set the
" Power Switch " ( 3-6, Fig. 1 ) to the " On " position.
Until one beeper sound is present, then release the
finger away from " function A Button ".
3) a. The bottom left corner of LCD will show the
" COUNT " marker, at the same time the LCD will
show no. of sample units from 10, 20, 50, 100 in
sequence & changed per second.
b. Put the counting sample units ( For example 10 PCs,
20 PCs, 50 PCs or 100 PCs ) on the platform.
c. Until the display reach the no. of sample units
exactly, for example " 50 ", push the " function A
Button " ( 3-3, Fig. 1 ) once a while. The display
will flash twice and freeze the sample counting no.,
then take away the sample units. Now the
balance is ready for counting.
7. COUNTING SCALE OPERATION
PROCEDURE

9
Under the counting version if intend to change the
counting sample units, the new procedures are following :
a. Take away any load from the platform.
b. Push the " function A Button " ( 3-3, Fig. 1 ) once a
while. LCD will show no. of sample units from 10, 20,
50, 100 in sequence & changed per second.
c. Put the counting sample units ( For example 10 PCs,
20 PCs, 50 PCs or 100 PCs ) on the platform. Until the
display reach the no. of sample units exactly, for
example " 50 ", push the " function A Button " ( 3-3,
Fig. 1 ) once a while again. The display will flash
twice and freeze the set counting no., then take away
the sample units. Now the balance is ready for counting
& the sample counting units already change to new
value.
Consideration :
@ Under the counting function, 1 PC weight
should large than 0.10 g, other wise the
result of counting no. may existing some
error.
@ The accuracy for the " counting no. " result
are always depend on the no. of " sample
units " that key in. We strong recommend
that it can take more sample units as
possible, for example 50 PCs or more, then
will get the best accuracy.
4) a. Take away the counting sample units away from
the platform, then put the new lot of units that
intend to be counted on the platform.
b. The display will show the counting no. of the new
" sample units ".
Change to the new counting sample units

10
9. DC 9V AC/DC ADAPTER
OPERATION
8. BATTERY REPLACEMENT
If battery is weak, LCD display will show " LO " indicator.
Every 1 second the " LO " indicator will flash one time.
This reminds user to replace new battery.
1) Open " Battery Cover " ( 3-8, Fig. 1 ) located at the bottom
of the scale.
2) According to the device instruction, place batteries ( 1.5V
AA size battery x 6 PCs ) into the battery compartment &
replace the battery cover.
1) The scale will also be operated by the household ACV
power source (110/220/240 ACV) with a DC 9V AC/DC
Adapter ( capacity 300 mA at least ).
2) Plug the jack from the Adapter into the " DC 9V
receptacle " ( 3-9, Fig. 1 ).
3) Now the scale is ready for ACV operation.
* Adapter is optional accessory
10. RS232 PC SERIAL INTERFACE
The instrument features an RS232 output via 3.5 mm
Terminal ( 3-10, Fig. 1).
The connector output is a 16 digit data stream which
can be utilized to the user's specific application.

Scale
(3.5 mm jack plug)
PC
(9W 'D" Connector)
Center Pin......................... Pin 4
(3.5 mm jack plug)
Ground/shield.......................Pin 2
2.2 K
resistor
Pin 5
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
An RS232 lead with the following connection will be
required to link the instrument with the PC serial port.
The 16 digit data stream will be displayed in the
following format :
Each digit indicate the following status :
D15
Start Word
D14
4
D13
1
D12, D11
Annunciator for Display
g = 57 oz = 58 count = 30
D10
0
D9
Decimal Point(DP), position from right to the left
0 = No DP, 1= 1 DP, 2 = 2 DP, 3 = 3 DP
D8 to D1
Display reading, D8 = MSD, D1 = LSD
For
example :
If
the display reading is 1234, then D8 to D1 is :
00001234
D0
End Word
RS232 FORMAT : 9600, N, 8, 1
Baud rate
9600
Parity
No parity
Data bit no.
8 Data bits
Stop bit
1 Stop bit
11
0910- GM610P