General Measure GM7702 Manuale utente
GM7702
User Manual
GM7702-00180101
110607040003
VER01.00.12
©2018, Shenzhen General Measure Technology Co., Ltd
This manual is subject to change without notice at any time to improve the product. No
part of this manual can be photocopied, reproduced, or translated into another language
without the prior written consent of the General Measure Company.
Website: http://www.gmweighing.com
Implementation of standards: GB/T 7724—2008
Table of Contents
1 General Description......................................................................... - 1 -
1.1 Functions and Characteristics...............................................- 1 -
1.2 Front Panel Description........................................................- 2 -
1.3 Connector diagram............................................................... - 3 -
1.4 Technical Specifications.......................................................- 4 -
1.4.1 Common:...................................................................- 4 -
1.4.2 Analog:......................................................................- 4 -
1.4.3 Digital:...................................................................... - 4 -
2 Installation and Wiring.................................................................... - 6 -
2.1Connection of Power Supply.................................................- 6 -
2.2 Connection of Load Cell...................................................... - 6 -
2.3 Connection of I/O Terminal..................................................- 8 -
2.4 Serial Port Output...............................................................- 10 -
2.5 Connection of Analog.........................................................- 12 -
3 Data Input and Parameters.............................................................- 15 -
3.1 Parameters List...................................................................- 15 -
3.2 Data Input........................................................................... - 20 -
4. Calibration.................................................................................... - 22 -
4.1 Description......................................................................... - 22 -
4.2 Calibration Parameter.........................................................- 22 -
4.2.1 Empty Scale Calibration......................................... - 23 -
4.2.2 Weight Calibration.................................................. - 24 -
4.2.3 Calibration without Weight..................................... - 25 -
4.3 Calibration Record............................................................. - 26 -
5 Control Parameter..........................................................................- 28 -
6 I/O Module.....................................................................................- 31 -
6.1 I/O Module Define............................................................. - 31 -
6.2 I/O Module Test..................................................................- 32 -
7. Password Management................................................................. - 33 -
8. Serial Port Communication...........................................................- 34 -
8.1 r-Cont Mode...................................................................... - 34 -
8.2 Modbus Protocol................................................................ - 35 -
8.2.1 Modbus Address......................................................- 36 -
GM7702 User Manual
- 1 -
1 General Description
GM7702 weighing indicator is specially designed for weight transmitting in industrial
fields. This indicator has the features of small volume, plenty communicating commands, stable
performance, easy operation and practicability. It can be widely applied to concrete and bitumen
mixing equipment, metallurgy furnace and converter, chemical industry and feed, etc..
1.1 Functions and Characteristics
small volume, unique design and easy operation
applicable to all kinds of resistance strain gauge bridge load cell
front panel numerical calibration
multilevel of digital filter
automatic zero-tracking
automatically zero when power on
serial communication interface: RS232 or RS485
calibration via serial interface (Serial interface sets ON)
support 16-bit resolution DA output
2 In and 3 Out, support limit control output
online upgrade via RS232 serial port
tare weight function
GM7702 User Manual
- 2 -
1.2 Front Panel Description
Status:
ZERO: Light on when material weight is 0±1/4d.
STAB: Light on when material weight is within stable range.
NET: Light on when indicator is in net weight status.
COM: Light on when in communication status.
Keypad:
ZERO/ESC: Used to exit from current operation or go previous page.
In the status of net weight, press this key will enter gross weight status.
TARE: In the status of gross weight, press OPTION will tare and indicator show net
weight value.
When data input, the main display flash and the flash position will move.
MODE：To make flashing position move to the right digit when data inputting.
ENTER: Enter option when calibration or in parameter setting and can be used as
GM7702 User Manual
- 3 -
analog switching display.
1.3 Connector diagram
GM7702 User Manual
- 4 -
1.4 Technical Specifications
1.4.1 Common:
Power supply: DC24V±5%
Working temperature: -10～40℃
Max humidity: 90%R.H without dew
Power consumption: about 0.8W
1.4.2 Analog:
Load cell power: DC5V 100mA（MAX）
Input impedance: 10MΩ
Zero steady range: 0.00~12mV (Load cell 3mV/V)
Input sensitivity: 0.1uV/d
Input range: 0.00～15mV(Load cell 3mV/V)
Transfer mode: Sigma - Delta
A/D conversion speed: 120/240/480 times/sec.
Non-linearity: 0.01% F.S
Gain drift: 10PPM/℃
Display precision: 1/100000
1.4.3 Digital:
Weight display: 128*32 0.91”White light OLED
Minus display: “-”
Overload display: Voltage overlimit/underlimit
GM7702 User Manual
- 5 -
Decimal point: 5types (optional)
Function keys: 4keys soniferous keypad
Indice
Altri manuali General Measure Scala
