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GM7702 User Manual

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4.2.2 Weight Calibration

In order to meet the demands of multiple weight standards, user could set parameters of

weight point 1, weight point 2, weight point 3, weight point 4, which are helpful to calibrate

gain weight.

Weight:

0.000kg

Voltage:

0.000mV

Adding weight

Weight:

0.302kg

Voltage:

1.000mV

Pressing ENTER

In status of empty scale, pressing confirm key to

enter weight value 1, display weight and voltage

will show 0.

Adding weights, also recording both weight

value and voltage

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Содержание GM7702

Страница 1: ...GM7702 User Manual GM7702 00180101 110607040003 VER01 00 12...

Страница 2: ...e 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 Co...

Страница 3: ...r 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...

Страница 4: ...ation 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 Man...

Страница 5: ...8 3 Modbus RTU Modbus ASCII protocol 45 8 4 Chi mei PT650D Protocol 53 9 Dimension 55...

Страница 6: ...nd 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 pa...

Страница 7: ...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 an...

Страница 8: ...GM7702 User Manual 3 analog switching display 1 3 Connector diagram...

Страница 9: ...r DC5V 100mA MAX Input impedance 10M 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...

Страница 10: ...GM7702 User Manual 5 Decimal point 5 types optional Function keys 4 keys soniferous keypad...

Страница 11: ...elow 2 2 Connection of Load Cell GM7702 weighing indicator connects with bridge type resistance strain gauge load cells by 4 wires When use 6 wired load cells you must bridge the EX with SN and bridge...

Страница 12: ...GM7702 User Manual 7 2 2 1 Load Cell Connection Note 4 wires EX EX SG SG SHLD...

Страница 13: ...ow precision field otherwise use 6 wires connection 3 For more load cells parallel connection their sensitivity mV V should be the same 2 3 Connection of I O Terminal GM7702 weighing indicator has equ...

Страница 14: ...GM7702 User Manual 9 Indicator input terminal connection Indicator output terminal connection...

Страница 15: ...1 99 baud rate initial value 38400 option 9600 38400 57600 115200 data format initial value 8 E 1 option 8 E 1 8 O 1 8 N 1 7 E 1 7 O 1 communication Initial value Modbus RTU option Modbus RTU r Cont M...

Страница 16: ...GM7702 User Manual 11 RS232 Connection mode 9 pin connector 25pin connector or computer Indicator...

Страница 17: ...em Option Description Working mode 4 20mA Weight value could be converted to current of 4 20mA 0 5V Weight value could be converted to voltage of 0 5V 0 10V Weight value could be converted to voltage...

Страница 18: ...t value initial value 00 000 To set analog output value of max capacity Max output value initial value 00 000 To set max analog output value It will not change if converted value bigger than set value...

Страница 19: ...a professional Calibration method use a multimeter to connect the analog interface Select calibration point and press ENTER Contact to multimeter and input the display value finally press ENTER to co...

Страница 20: ...er Parameter item Description 1 Working parameter power up zero initial value OFF option ON OFF To proceed zero judgment when power on zero tracking range initial value 0 range 0 9d Automatic judgment...

Страница 21: ...ge allowed digital filter grade initial value 5 Range 0 9 Stronger filter grade more stable weight value stable filter grade initial value 0 Range 0 9 To proceed second filter on the base of digital f...

Страница 22: ...ity remote calibration ON OFF calibration with weight calibration without weight 3 Communicatio n parameter RS232 RS232 RS485 parameter setting Including ID no baud rate data format communication prot...

Страница 23: ...low this value Can be set in user define d mode zero point output value Analog value when weight value is zero max capacity output The analog value matches with max capacity value max output value The...

Страница 24: ...protection of all parameters or change password language Language version change Chinese English automatic lock screen The indicator will lock screen automatically if there are not any operation durin...

Страница 25: ...parameters value could be proceeding through 4 function keys Change of parameters TARE Upturn MODE Downturn Enter Confirm Parameter value input TARE value plus one MODE change position 1 Power up zer...

Страница 26: ...R confirm 3 Zero tracking time 4 Stable range 1 0 1 0 2 0 3 Zero tracking time 4 Stable range Press ENTER to select parameter Press MODE to change input position Press TARE to adjust input position Pr...

Страница 27: ...ut weight 4 2 Calibration Parameter Calibration parameter Parameter Description Unit g kg t lb initial value kg Decimal point 0 0 0 0 000 000 0 0000 initial value 0 00 Division 1 2 5 10 50 initial val...

Страница 28: ...2 1 Empty Scale Calibration To set empty scale as zero point Weight 2 100kg Voltage 1 843mV Press confirm key to set present status as zero Weight 0 000kg Voltage 1 843mV Note The scale must be empty...

Страница 29: ...weight point 2 weight point 3 weight point 4 which are helpful to calibrate gain weight Weight 0 000kg Voltage 0 000mV Adding weight Weight 0 302kg Voltage 1 000mV Pressing ENTER In status of empty s...

Страница 30: ...lable for calibration without weight If in urgent condition please follow below operations Zero calibration 01 843 Press zero calibration to enter zero millivolt manually interface then input the mill...

Страница 31: ...enter manually interface then input the gain voltage calibration value and press ENTER to complete 4 3 Calibration Record For calibration of weights please record zero millivolts gain millivolts and...

Страница 32: ...GM7702 User Manual 27 2 3 4...

Страница 33: ...output proceeded when stable min duration initial value 0 range 0 99 9S upper limit value initial value 0 Valid when present weight value upper limit value Define OUT port as upper limit Middle limit...

Страница 34: ...itial value 0 The indicator will judge preset value 1 when the comparison condition is greater than or equal to less than or equal to preset value 2 initial value 0 Upper limit value must be greater t...

Страница 35: ...aintains the state before the weight change when the weight is stable if the current weight is greater than 1000 the output port 1 is valid In the effective 2S time if the weight is reduced to 800 in...

Страница 36: ...he input port is defined as the corresponding function the trigger input port is valid and the function is executed 1 zero 2 tare 3 trigger set point 1 4 trigger set point 2 5 trigger set point 3 6 tr...

Страница 37: ...F connect external switch correctly DC 24V When external trigger switch is valid and input port parameter sets on means connection is already If the input and output status is not valid as preset chec...

Страница 38: ...tion parameter Password must set ON and input correct password when enter Initial password 000000 Parameter Description Password ON OFF option ON OFF User has to input password if set ON Change passwo...

Страница 39: ...X ID no Channel no Status Weight value CRC CR LF 02 2 bytes 31 2 bytes 7bytes 2bytes 0D 0A ID no 2 bytes range 01 99 Status 2 bytes High byte 40H Definition of low byte as below D6 D5 D4 D3 D2 D1 D0 n...

Страница 40: ...positive value weight value is 700 8 2 Modbus Protocol The indictor communicates in RTU mode and each 8 bit byte is divided into 2 4 bit hexadecimal character transmissions Function code Function cod...

Страница 41: ...al 04 indicator fault Indicator fault when operation 07 invalid Order received is invalid 8 2 1 Modbus Address PLC addr Display addr Description Read only register function code 0x03 40001 0000 presen...

Страница 42: ...05 0004 40006 0005 net weight value 40007 0006 40008 0007 tare value 40009 0008 40010 0009 c tare current weight floating point data 40011 0010 40012 0011 tare v gross weight floating point data 40013...

Страница 43: ...too low D11 previous gain has not calibrated D12 non weights for calibration 40017 0016 gross weight floating point data 40018 0017 40019 40020 0018 0019 Reserved Allow to read value 0 Read Write writ...

Страница 44: ...ht gain point 2 weight value max capacity 40033 0032 40034 0033 gain point 4 calibration with weight gain point 3 weight value max capacity 40035 0034 40036 0035 zero calibration without weight input...

Страница 45: ...40058 0057 stable filter level 0 9 40059 0058 AD sample rate 0 120 times sec 1 240 times sec 2 480 times sec 40060 0059 control mode 0 upper and lower limit mode 1 preset point mode 40061 0060 Indicat...

Страница 46: ...low to read value 0 40081 0080 Preset point 1 judge stable 0 No 1 Yes 40082 0081 preset point 1 min duration time 0 999 0 99 9s 40083 0082 preset point 1 comparison condition 0 greater or equal to 1 s...

Страница 47: ...reset point 3 min duration time 0 999 0 99 9s 40103 0102 preset point 3 comparison condition 0 greater or equal to 1 smaller or equal to 2 within the range 3 outside the range 40104 0103 preset point...

Страница 48: ...2 0121 IN 2 define 40123 0122 OUT 1 define 40124 0123 OUT 2 define 40125 0124 OUT 3 define 40126 0125 test status Write 1 in 0125 address to enter I O module test 40127 0126 input test 40128 0127 outp...

Страница 49: ...1 upper limit status 40163 0162 middle limit status 40164 0163 lower limit status Read Write function code of read 0x01 function code of write 0x05 00000 0000 zero clear tare read write address write...

Страница 50: ...2 middle limit status 00024 0023 lower limit status 00025 00032 0024 0031 Reserved allow to read value 0 8 3 Modbus RTU Modbus ASCII protocol PLC Address Protocol Address Description Remark Four byte...

Страница 51: ...ive 1Negative bit4 0 AD Normal 1 AD wrong bit5 bit31 0 standby 40004 0003 40005 0004 Reserved The reserved bit data is fixed as 0x7F R E V 40006 0005 40007 0006 Reserved The reserved bit data is fixed...

Страница 52: ...R E V 40014 0013 40015 0014 Reserved The reserved bit data is fixed as 0x7F R E V 40016 0015 40017 0016 Weight value Current Weight Value 40018 0017 40019 0018 Reserved The reserved bit data is fixed...

Страница 53: ...FL bit2 0 None Zero 1 Zero bit3 0 positive 1Negative bit4 0 AD Normal 1 AD wrong Bit5 bit31 0 standby 40026 0025 Two byte read write region Supported function code 03 06 40101 0100 digital filter grad...

Страница 54: ...our byte read write region Supported function code 03 16 40201 0200 Max capacity write range division 100000 40202 0201 40203 0202 weight zero calibration Write non zero value pair for zero calibratio...

Страница 55: ...aces 40208 0207 40209 0208 The number of millivolts of gain written when the gain is calibrated without weight Read as gain millivolt during calibration fixed 3 decimal points Read as gain weight valu...

Страница 56: ...rite operation write 1 zero calibration Write 0 no operationRead operation read as 1 the device is in zero stateRead as 0 the device is in a non zero state 00402 0401 Reserved Write invalid and return...

Страница 57: ...on zero state 00406 0405 Reserved Write invalid and returns address error messageRead operation read as fixed 0 00407 0406 00408 0407 00409 0408 00410 0409 00411 0410 00412 0411 00413 0412 System rest...

Страница 58: ...d 0 currently in high byte mode 8 4 Chi mei PT650D Protocol Protocol descriptions as follow Protocol choose PT650D data frame format adjusted to7 E 1 Baud rate adjusted to 9600 Under this protocol dat...

Страница 59: ...US unstable display No 3 2C HEX No 4 5 Status 2 NT Net Weight GS Gross Weight No 6 2C HEX No 7 positive negative No 8 14 weight value if no decimal point output a space at No 8 overflow state readout...

Страница 60: ...GM7702 User Manual 55 9 Dimension...

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