Lutron Electronics DIGITAL BALANCE GM-600P User manual

600 g x 0.02 g
DIGITAL BALANCE
Model : GM-600P
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. FEATURES
* Microprocessor circuit with hi
g
h accuracy & better
performance.
* 0.02
g
& 0.001 oz resolution & wide measurin
g
capacity.
*Lar
g
e LCD display, 20.7 mm ( 0.8" ) di
g
it size, easy read out.
* Built-in
g
ram & oz display unit, select by the internal
slide switch.
* Built-in self calibration system, the calibration value can
memorize into EEPROM circuit permanently even power
off.
*Hi
g
h precision countin
g
scale function.
* RS-232 computer interface.
* Accept battery or AC/DC adapter power source, two way
power supply.
* Built-in " level bubble " & the ad
j
ustable " rubber pads ".
* Heavy duty ABS housin
g
plastic case.
2. SPECIFICATIONS
Display LCD, 20.7 mm ( 0.8" ) di
g
it size, 5 di
g
its
with annunciator.
Measuring range & Unit Range Resolution
Resolution g 0.20 g to 600 g 0.02 g.
oz 0.007 oz to 21.164 oz 0.001 oz
Min. Display Weight g 0.20 g
oz 0.007 oz
Unit Select g or oz, select by internal slide switch.
1

Accuracy ± ( 0.05 % + 0.08
g
)
*
Within two hours after self calibratio
n
be executed.
23± 5 .℃
*
Spec. tested under the environment R
F
Field Stren
g
th less than 3 V/M
&
frequency less than the 30 MHz only.
Samplin
g
time Approx. 1 second.
Tare Control Approx. 300
g
max.
Transducer Load cell.
Circuit Microprocessor circuit.
Auto Calibration Use 200
g
or 400
g
standard wei
g
ht to
execute self-calibration automatically.
Operatin
g
0 to 50 ( 32 to 122 ).℃℃℉ ℉
Temperature
Operatin
g
Humidity Less than 80% RH.
Size Cabinet 250 x 187 x 70 mm
Platform Round, 120 mm Dia.
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 * Software ( Windows version ),
accessories SW-U801-WIN, SW-E802.
* RS232 cable, UPCB-02
* USB cable, USB-01.
* 200
g
calibration wei
g
ht, WT-200
2

3. FRONT PANEL DESCRIPTION
Side view Bottom view
Front view Back view Fi
g
. 1
3

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
Fi
g
. 2
4

5. MEASURING PROCEDURE
As intend to let the balance under the best operatio
n
condition, it recommend to warm up the balance at leas
t
30 minutes before make the operation.
1) Place the balance on a flat hard surface.
Ad
j
ust the " Rubber Pad " ( 3-7, Fi
g
. 1 ) until the water
bubble of the " Level Bubble " ( 3-2, Fi
g
. 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, Fi
g
. 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 ri
g
ht position will set t
o
"
g
ram " unit & the ri
g
ht down corner of LCD will show th
e
"
g
" marker.
* Slide the " Unit Switch " to the left position will set t
o
" oz " unit.
3) Turn the " Power Switch " ( 3-6, Fi
g
. 1 ) to the " On " position.
1 = On, 0 = Of
f
The " Display " ( 3-5, Fi
g
. 1 ) will show " 8.8.8.8.8 " for a few
seconds, then " 0 " value ( 0.00
g
for
g
ram function, 0.0000
for oz function ) will be present.
4) Apply the load to the platform
g
ently, display will show
the measurin
g
wei
g
ht values.
* Do not exceed the over load capacity of the scale.
* Over wei
g
htin
g
, the display will show " - - - - - ".
5) Tare function :
After wei
g
htin
g
the first item, press " Tare Button " ( 3-4,
Fi
g
. 1 ), scale will reset to zero values automatically.
At the same time, the LCD display will show the " TARE "
mark. Place next wei
g
hted item onto scale. Scale will
g
ive wei
g
hts of the second only.
5

Consideration of tare functio
n
* If the display show minus wei
g
ht or show "_ _ _ _ _
"
means the display readin
g
is under the zero, the
n
tare function should be executed.
* Before measurin
g
the wei
g
ht, If the display is no
t
zero & show some value, it means the internal circui
t
is over the zero, then tare function should b
e
executed.
*
T
he max. tare capacity is approx. 600
g
.
*
T
he " Tare " marker will disappear until power of
f
and power on a
g
ain.
6. SELF-CALIBRATION
1) Please prepare the followin
g
optional " Standard Wei
g
ht " :
200
g
ram standard wei
g
ht (WT-200, optional).
or 400
g
ram standard wei
g
ht.
2) Calibration under the 400
g
ram standard wei
g
ht
a) Power on the scale until the display show zero value.
Apply the 400
g
ram standard wei
g
ht to the center of the
platform
g
ently. If the scale is not accurate, then may
show the wei
g
ht value around 400
g
( for example 399.90
g
, 400.10
g
.....)
b)
Step 1 :
Press the " CAL. Button " ( 3-3, Fi
g
. 1 ) once,
display will show the value of " 200.00
g
"
Step 2 :
Followin
g
press the " Tare Button " ( 3-4, Fi
g
. 1 ) once,
display will show the value of " 400.00
g
"
6

Step 3 :
Press the " CAL. Button " ( 3-3, Fi
g
. 1 ) once a
g
ain,
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
g
ram standard wei
g
ht
a) Power on the scale until the display show zero value.
Apply the 200
g
ram standard to the center of the
platform
g
ently. If the scale is not accurate, then may
show the wei
g
ht value around 200
g
( for example 199.90
g
, 200.10
g
.....)
b)
Step 1 :
Press the " CAL. Button " ( 3-3, Fi
g
. 1 ) once,
display will show the value of " 200.00
g
"
Step 2 :
Press the " CAL Button " ( 3-3, Fi
g
. 1 ) once a
g
ain,
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
:
*
T
he internal Self-Calibration value is saved to th
e
internal EEPROM circuit permanently. Once power off the
n
power on, the calibration value will be not disappeared .
* After make the self calibration, measure the 200
g
or 400
g
standard wei
g
ht a
g
ain, if the display value existin
g
few
counts deviation, it is normal. However within few hours,
the balance will be kept under a hi
g
h accuracy condition.
T
hose accuracy will be even better than the published
specification ( refer pa
g
e 2 ).
* Under the status of " oz " unit, still can use the wei
g
ht o
f
200
g
or 400
g
to make the calibration. However the "
g
"
marker will disappear.
7

7. COUNTING SCALE OPERATION
PROCEDURE
1) Prepare a lot of countin
g
sample units. The no. of countin
g
sample will be 10 PCs, 20 PCs, 50 PCs or 100 PCs.
The more PCs of countin
g
sample will be better.
2)
*
No load to put on the platform.
*Usethefin
g
er to hold the " CAL. Button ( function
A
Button ) " ( 3-3, Fi
g
. 1 ), at the same time set the
" Power Switch " ( 3-6, Fi
g
. 1 ) to the " On " position.
Until hear the " Bi Bi sound " , release the fin
g
er away from
" function A Button ", then 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
&
chan
g
ed per second.
* Put the countin
g
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, Fi
g
. 1 ) once a while. The display will flash
twice and freeze the sample countin
g
no., then take away
the sample units. Now the balance is ready for countin
g
.
8

Chan
g
e to the new countin
g
sample units
Under the countin
g
version if intend to chan
g
e the
countin
g
sample units, the new procedures are followin
g
:
a. Take away any load from the platform.
b. Push the " function A Button " ( 3-3, Fi
g
. 1 ) once a
while. LCD will show no. of sample units from 10, 20,
50, 100 in sequence & chan
g
ed per second.
c. Put the countin
g
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,
Fi
g
. 1 ) once a while a
g
ain. The display will flash
twice and freeze the set countin
g
no., then take away
the sample units. Now the balance is ready for countin
g
& the sample countin
g
units already chan
g
e to new
value.
Consideration
:
@ Under the countin
g
function, 1 PC wei
g
h
t
should lar
g
e than 0.50
g
, other wise the resul
t
of countin
g
no. may existin
g
some error.
@ The accuracy for the " countin
g
no. " result ar
e
always depend on the no. of " sample units " tha
t
key in. We stron
g
recommend that it can tak
e
more sample units as possible, for example 5
0
PCs or more, then will
g
et the best accuracy.
4) Step 3 :
* Take away the countin
g
sample units away from
the platform, then put the new lot of units that
intend to be counted on the platform.
* The display will show the countin
g
no. of the new
" sample units ".
9

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, Fi
g
. 1 ) located at the bottom
of the scale.
2) Accordin
g
to the device instruction, place batteries ( 1.5V
AA size battery x 6 PCs ) into the battery compartment
&
replace the battery cover.
9
.
DC
9V
AC/DC
ADAPTER
OPERATION
(Adapter is optional accessory)
1) The scale will also be operated by the household ACV
power source (110/220/240 ACV) with a DC 9V
Adapter ( capacity 300 mA).
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.
10
.
RS232
PC
SERIAL
INTERFACE
The instrument features an RS232 output via 3.5 mm
Terminal ( 3-10, Fi
g
. 1).
The connector output is a 16 di
g
it data stream which can be
utilized to the user's specific application.
10

An RS232 lead with the followin
g
connection will
be required to link the instrument with the PC
serial input.
Scale PC
(3.5 mm jack plug) (9W 'D" Connector)
Center Pin........................................ Pin 4
Ground/shield......................................Pin 2 2.2 K
resistor
Pin 5
The 16 di
g
it data stream will be displayed in the followin
g
format :
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Each di
g
it indicate the followin
g
status :
D15 Start Word
D14 4
D13 1
D12, D11 Annunciator for Display
g
= 57
oz = 58
count = 30
D10 Polarity
0 = Positive 1 = Ne
g
ative
D9 Decimal Point(DP), position from ri
g
ht to the left
0 = No DP, 1= 1 DP, 2 = 2 DP, 3 = 3 DP
D8 to D1 Display readin
g
, D1 = LSD, D8 = MSD
For example :
If the display readin
g
is 1234, then D8 to D1 is :
0000123
4
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
1109-GM600P