Gtech GL-6000L Series User manual

PORTABLE ELECTRONIC SCALE
Service Manual
GL-6000L
■
Please read this manual before using.
■
Keep this manual in safe location after reading
Series

2

3
INDEX
Introduction ..................................................................................................................................................................................4
1Safety Precaution .............................................................................................................................................................4
2Name of Each Part and Product Size ......................................................................................................................7
2.1 Name of Each Part ...............................................................................................................................................7
2.2 Product Size............................................................................................................................................................8
2.3 Display and Keys...................................................................................................................................................9
2.4 Key Functions...................................................................................................................................................... 10
3Test Mode........................................................................................................................................................................... 11
3.1 How to Enter Test Mode................................................................................................................................. 11
3.2 Description of Test Mode............................................................................................................................... 11
4Calibration Mode ............................................................................................................................................................ 11
4.1 How to Enter Calibration Mode................................................................................................................... 11
4.2 Description of Calibration Mode................................................................................................................. 11
5Gravity Acceleration Setting Mode ....................................................................................................................... 13
5.1 How to Enter Gravity Acceleration Setting Mode ............................................................................... 13
6General Setting Mode .................................................................................................................................................. 13
6.1 How to Enter General Setting Mode......................................................................................................... 13
7User Setting Mode......................................................................................................................................................... 16
7.1 How to Enter User Setting Mode ............................................................................................................... 16
7.2 Description of User Settings........................................................................................................................ 16
8Communication Interface (RS-232C) .................................................................................................................. 20
8.1 RS-232C Pin Arrangement and Connection ......................................................................................... 20
8.2 Signal Format...................................................................................................................................................... 20
8.3 Data Format......................................................................................................................................................... 20
9How to Download Program ....................................................................................................................................... 22
9.1 Downloader Connection................................................................................................................................. 22
9.2 How to Download .............................................................................................................................................. 23
9.3 Setting Default Unit ......................................................................................................................................... 27
10 Error Messages & Trouble Shooting Guide ....................................................................................................... 28
11 How to Sealing............................................................................................................................................................... 29
12 GL6000L Series –MS EXPLODED ............................................................................................................................ 30
13 Specification..................................................................................................................................................................... 32

4
Introduction
Thank you for purchasing G-Tech Portable Electronic Scale GL-6000N Series. This product
has passed strict QC test and guarantees excellent performance. Please read this manual
carefully before using the product to understand the characteristics of the product and
how to use it.
1Safety Precaution
It is important to handle this product in the right way. If it is not used properly, it may cause
unexpected accidents resulting in personal injury or property damage.
- In this manual, possible hazardous situations are informed in order to prevent any
accident. Such situations are displayed in different categories.
( Warning, Caution and Notice ).
(1) Unauthorized duplication of this manual in part or in whole is prohibited.
(2) The contents of this manual are subject to change without notice.
(3) If there is any incorrect or missing information in this manual, or if you have any
questions, please contact the place of purchase or your nearest dealer.
(4) Please be informed that G-Tech does not accept any liability for loss or claim for loss due
to the operation of this device regardless of (2) and (3).

5

6

7
2Name of Each Part and Product Size
2.1 Name of Each Part
①Display: Displaying the current weight on the platform
②Platform: Placing an object to be weighted
③Level: Checking if the product is level
④Handle: Convenient when moving the product
⑤Limit Bolt: Load Cell Limit Bolt
⑥ Battery : C SIZE 1.5V 4 EA
⑦Adjust Foot: Used to level the product
⑧Communication Port: RS-232C type, (RJ11 Connector) ⑨Adapter Jack

8
2.2 Product Size

9
2.3 Display and Keys
Symbol
Description
Stabilization
display lamp
It is turned on when the weight is stable.
ZERO
Zero
display lamp
It is turned on when the weight is “0”.
NET
Tare
display lamp
It is turned on while net weight is displayed
(when tare function works).
Ib/kg
Measurement unit
display lamp
It displays measurement unit.
Remaining battery
display lamp
It displays remaining battery.
(3 stages)

10
2.4 Key Functions
Key
Description
1) It sets the current weight “0” within a certain degree of the
maximum weight.
2) When the ‘Zero’ Key is long pressed, the direction of
LCD display is reversed.
1) It is used to set / release tare function.
2) When the Key is long pressed, you can adjust the upper
Limit / lower limit of value.
1) When the ‘PRINT’ Key is pressed after placing an object on the platform,
the current weight is transmitted via communication port.
2) When the ‘PRINT’ Key is pressed without an object on
the platform, the total amount of weight is printed out.
(when printer output is used)
1) When pressed short, measurement unit changes.
2) When pressed long, the upper limit/lower limit function is
turned ‘ON/OFF’.
1) It turns ‘ON/OFF’ the power.

11
3Test Mode
3.1 How to Enter Test Mode
Turn the power on while pressing "ZERO" Key to enter Test Mode with “TEST” being
displayed on the display.
3.2 Description of Test Mode
4Calibration Mode
4.1 How to Enter Calibration Mode
Turn the power on and press "CAL" Key or “ZERO + UNIT + PRINT” Keys together until
show “CAL” on the display to enter the Calibration Mode.
4.2 Description of Calibration Mode
4.2.1 Maximum Weight Setting (select model)
: It allows to select the maximum weight. Press “PRINT” Key while “CAL” is shown on the
display to display the current maximum weight.
Use below Keys to change the maximum weight.
- UNIT Key: Use to change the maximum weight.
- PRINT Key: Use to save a newly set maximum weight and return to the previous page.
Test Type
Description
A/D Test
Don’t press any Key to show the current A/D value on the display.
Communication
Test
Press "TARE" Key to show “Serial test ok” on the display via serial
communication.
Backlight Test
Press "UNIT" Key to change backlight brightness and show the value
of brightness levels.
Count Value Test
Press "PRINT" Key to show count value on the display. Press “ZERO” Key while
the count value is displayed to adjust the count value.

12
lb Model
Capacity, division
kg Model
Capacity, division
60.000 lb
capacity : 30/60 lb
division : 0.01/0.02 lb
30.000 kg
capacity : 15/30 kg
division : 0.005/0.01 kg
150.000 lb
capacity : 60/150 lb
division : 0.02/0.05 lb
60.000 kg
capacity : 30/60 kg
division : 0.01/0.02 kg
300.000 lb
capacity : 150/300 lb
division : 0.05/0.1 lb
150.000 kg
capacity : 60/150 kg
division : 0.02/0.05 kg
500.000 lb
capacity : 250/500 lb
division : 0.1/0.2 lb
200.000 kg
capacity : 200 kg
division : 0.05/0.1 kg
4.2.2 How to Proceed with General Calibration Mode
: It adjusts calibration to display weight properly. To enter General Calibration Mode,
press “TARE” key ”C ZERO" while is shown on the display to display.
Stage
Description
Zero Adjustment
It adjusts zero point. When “C ZERO” is shown on the display, empty
the platform and press “TARE” Key once the weight is stabilized to
save the current zero point.
Calibration
Completed
Select a standard weight to use for calibration, Place a weight
equivalent to the weight displayed on the display on the platform and
press “TARE” Key to start weight adjustment.
- UNIT Key: Use to change the standard weight.
- TARE Key: Start weight adjustment.
END
Once the weight adjustment is completed, “END" is shown on the
display and Measurement Mode is started.
4.2.3 How to Proceed with Multi Calibration
: It allows to adjust weight through 3 sections. Press “UNIT” Key while “CAL” is shown on the
display to display "C ZERO" and proceed with multi calibration.
Stage
Description
Zero Adjustment
It adjusts zero point. When “C ZERO” is shown on the display, empty the
platform and press “TARE” Key once the weight is stabilized to save the
current zero point.
Weight Adjustment
for Section 1
Place a weight equivalent to the weight displayed on the display on the
platform and press “TARE” Key to start weight adjustment for section 1.
Weight Adjustment
for Section 2
Place a weight equivalent to the weight displayed on the display on the
platform and press “TARE” Key to start weight adjustment for section 2.
Weight Adjustment
for Section 3
Place a weight equivalent to the weight displayed on the display on the
platform and press “TARE” Key to start weight adjustment for section 3.
Calibration
Completed
Once the weight adjustment is completed, “END" is shown on the display
and Measurement Mode is started.

13
5Gravity Acceleration Setting Mode
5.1 How to Enter Gravity Acceleration Setting Mode
: Press "On/Off" Key to turn on the power and press “ZERO” Key until the booting is
completed to show "CAL4" on the display and enter Gravity Acceleration Mode.
- ZERO Key: Add 1 to the flickering digit
- TARE Key: Move the flickering digit to the left
- PRINT Key: Save the settings and enter Measurement Mode
* The gravity constant compensation function is not set at the factory. To use this function,
you must separately set the gravity constant value and calibrate it.
6General Setting Mode
6.1 How to Enter General Setting Mode
: Press "ON/OFF" Key to turn on the power and press “ZERO” and “TARE” Keys until the
booting is completed to show "p-zero" on the display and enter General Setting Mode. Use
below Keys to change settings.
- UNIT Key: Change setting type and setting value.
- TARE Key: Select settings
Description of General Setting Mode
Type
Initial Value
Setting Value
Description
p-zero
3
It sets the range of initial zero point.
(e.g.) When the setting value is set 10, it means to be
within ±10% of capacity.
5
●
10
20
30
40
50
100
Type
Initial Value
Setting Value
Description
z-rang
●
2
It sets the range of zero key function.
(e.g.) When the setting value is set 2, it means to be
within ±2% of capacity.
3
4
10
20

14
Type
Initial Value
Setting Value
Description
z-trac
0d
It sets zero tracking division.
(e.g.) When the setting value is set 5d, zero function
will happen if the change in zero point is within
graduation 0.5 per second.
●
5d
10d
15d
20d
25d
30d
35d
40d
45d
Type
Initial Value
Setting Value
Description
z-retu
0d
It sets automatic zero point division.
(e.g.) When the setting value is set 50, zero function
will happen if the remaining value is within
graduation 0.5
●
5d
10d
15d
20d
25d
30d
35d
40d
45d
Type
Initial Value
Setting Value
Description
u-kg
●
kg-on
It sets a decimal points.
(e.g.) When comma is selected, decimal points will be
displayed as “ . ”
kg-off
Type
Initial Value
Setting Value
Description
u-lb
●
lb-on
It sets a decimal points.
(e.g.) When comma is selected, decimal points will be
displayed as “ . ”
lb-off
Type
Initial Value
Setting Value
Description
u-powe
●
lb
It sets a unit of calibration.
When lb is selected, calibration unit will be lb.
kg

15
Type
Initial Value
Setting Value
Description
dot
●
comma
It sets a decimal points.
(e.g.) When comma is selected, decimal points will be
displayed as “ . ”
semi colon
Type
Initial Value
Setting Value
Description
save
-
-
It saves new settings and enters
Measurement Mode.

16
7User Setting Mode
7.1 How to Enter User Setting Mode
■ While pressing Key and Key, turn on the to show on the display
and enter the User Setting Mode.
Use below Keys to change setting value.
■ : It changes setting mode or setting value.
■ : It confirms settings.
7.2 Description of User Settings
①Auto Off Time Settings
Type
Initial Value
Setting Value
Description
disable
It sets auto off time.
If the scale is stable for the preset time, it is turned
off automatically.
Notice: If the auto off time is set 10min., the product
is automatically turned off after 10 minutes.
3min
5min
●
10min
20min
30min
40min
50min
60min
②Backlight Brightness Setting
Type
Initial Value
Setting Value
Description
darkest
It adjusts the brightness of the backlight.
bright1
Bright2
Bright3
●
Bright4
Bright5
Bright6
Bright7

17
③Backlight Time Setting
Type
Initial Value
Setting Value
Description
5s
It sets backlight auto off time..
If the scale is stable for the preset time, the
backlight is automatically turned off.
Notice: It is set 20s, the backlight is turned off after
20 seconds.
10s
●
20s
30s
40s
50s
60s
on
off
④Communication & Printer Output Setting
Type
Initial Value
Setting Value
Description
disable
Not used
It sets Communication
& Printer Output Mode.
stre-s
Serial (Stream)
●
comm-s
Serial (Command)
stab-s
Serial (when the
weight is stable)
keyz-s
Serial (when the
ZERO Key is pressed)
stab-p
Printer (when the
weight is stable)
keyz-p
Printer (when the
ZERO Key is pressed)
⑤Baud Rate Setting
Type
Initial Value
Setting Value
Description
br-24
It sets baud rate.
Notice: It communicates in 9600bps when setting
br-96.
br-48
●
br-96
br-192
⑥Parity Bit Setting
Type
Initial Value
Setting Value
Description
●
n81
8bits,Non Parity
It sets Parity Bit.
e81
8 bits, Even parity
o8
8 bits, Odd parity

18
⑦Print Format Setting
⑧Display Speed Setting
Type
Initial Value
Setting Value
Description
Slow
It sets display speed.
●
Medium
Fast
⑨Buzzer Motion Setting
Type
Initial Value
Setting Value
Description
disable
It disables
buzzer sound.
It sets buzzer motion.
●
enable
It enables
buzzer sound
Type
Initial Value
Setting Value
Description
Form-1
It sets printer format.
Refer to the following format.
●
Form-2
Form-3
Form-3 It sets RS-232C Communication Data Format.
(Refer to 5-3. Data Format)
-Form-3 : Data Format 1
- Form-4 : Data Format 2
Form-4
Form-1 Form-2

19
⑩Zero Lamp Display Setting
Type
Initial Value
Setting Value
Description
●
Net, gross
Zero lamp is
displayed when
gross weight/net
weight is zero.
It sets zero lamp display.
gross
Zero lamp is
displayed when
gross weight is
zero.
⑪Limit Function Setting
Type
Initial Value
Setting Value
Description
●
off
It turns off Limit
function.
It sets conditions for the
Limit function.
i-side
Lower limit ≤ current
weight ≤ upper limit
o-side
Currentweight<lower
limitorcurrentweight>
upperlimit
lo
Currentweight<lower
limit
hi
Currentweight>upper
limit
⑫Buzzer Sound of Limit Function Setting
Type
Initial Value
Setting Value
Description
off
It turns off
buzzer sound.
It sets the buzzer sound
interval while limit function is on.
1 t
1 time per
second
●
2 t
2 times per
second
⑬Limit Function Setting
Type
Initial Value
Setting Value
Description
●
lit-us
ItturnsonLimitfunction
whethertheweightis
stableornot.
It sets Limit function depending on
stable/unstable state.
lit-st
ItturnsonLimitfunction
onlytheweightisstable

20
8Communication Interface (RS-232C)
8.1 RS-232C Pin Arrangement and Connection
2pin
RXD
RXD
2pin
GL-6000
3pin
TXD
TXD
3pin
PC
5pin
GND
GND
5pin
8.2 Signal Format
8.3 Data Format
8.3.1 Data Format 1 (18 Byte)
8.3.1.1 Header 1 (2 Byte)
-US : Unstable Display
-ST : Stable Display
-OL : OVER LOAD
-
8.3.1.2 Header 2 (2 Byte)
-GS : Gross Weight
-NT : Net Weight
-
8.3.1.3 DATA (8 Byte)
-2B(H) : “+” PLUS
-2D(H) : “-“ MINUS
-20(H) : “ “ SPACE
-2E(H) : “.” DECIMAL POINT
-
8.3.1.4 Unit
-kg
-lb
LSB MSB
1 1 0 1 0 0 1 0
Low
High
START BIT
STOP BIT
NEXT START BIT
, , CR LF
Header 1
Header2
Data(+Parity bit)
Unit
RJ 11 Port