KYOWA WGA-670B-0 Instruction Manual
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KYOWA WGA-670B-0 Instruction Manual

Instrumentation amplifier
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  • Page 1 (217) 352-9330 | Click HERE Find the Kyowa WGA-670B-0 at our website:...
  • Page 2 Copyright © KYOWA ELECTRONIC INSTRUMENTS CO., LTD. All rights reserved. This Instruction Manual may not be copied or reproduced, in whole or part, without consent of KYOWA. This Instruction Manual has been prepared with great care. However, if the need should arise for more information, contact KYOWA or our representative.

  • Page 4: Table Of Contents

    CONTENTS SAFETY PRECAUTIONS ............................1 PRIOR TO USE ......................................1 SAFETY SYMBOLS.....................................1 STANDARD ACCESSORIES............................3 TYPES....................................3 1. PARTS NAMES & PRINCIPAL FUNCTIONS..................... 4 1-1 FRONT PANEL .......................................4 1-2 REAR PANEL ......................................5 2. CONNECTION ................................6 2-1 INSTALLING TO PANEL ..................................6 2-2 WIRING........................................6 2-2-1 Terminal Board....................................6 2-2-2 Connecting Power Supply.................................6...
  • Page 5 6. BCD OUTPUT OPTION ............................30 6-1 OUTLINE ......................................30 6-2 PIN NO. & SIGNAL NAME.................................30 6-3 SETTING BCD OUTPUT..................................31 6-4 CONNECTING BCD OUTPUT ................................31 6-5 SIGNAL TIMING....................................32 7. RS-232C OPTION..............................33 7-1 OUTLINE ......................................33 7-2 RS-232C INTERFACE..................................33 7-3 OUTLINE of CONTROL COMMAND ...............................35 7-4 DETAILS of VARIOUS CONTROL COMMANDS..........................37 8.

  • Page 6: Safety Precautions

    This Instruction Manual describes details of WGA-670B Instrumentation Amplifier. For safe use of the WGA-670B, do not forget to read the “Safety Precautions” prior to use. KYOWA ELECTRONIC INSTRUMENTS CO., LTD. assumes no liability for any damages resulting from the user’s failure to comply with the safety precautions.
  • Page 7 4) Basically, the WGA-670B is designed to be used by connecting the strain gage transducer to the input terminal. If it is used by connecting transducers other than above, contact KYOWA for information. 5) Operate the WGA-670B by conforming to the operating environment described in this Instruction Manual.

  • Page 8: Standard Accessories

    TYPES The WGA-670B has various types with optional functions as follows. Model Name No option With BCD output With RS-232C output Compatible with TEDS WGA-670B-0 ○ WGA-670B-1 ○ WGA-670B-7 ○ ○ TEDS: Transducer Electronic Data Sheet (hereinafter referred to as the TEDS)

  • Page 9: Parts Names & Principal Functions

    1. PARTS NAMES & PRINCIPAL FUNCTIONS 1-1 FRONT PANEL A) Indicator .......• Indicates measured values, selected functions, and set values. • Normally, it indicates measured values responding to the output from the transducer. However, if error occurs, the following appears. OFL1: When measured value is exceeding the measuring range to the minus side.

  • Page 10: Rear Panel

    1-2 REAR PANEL A) Optional .......• WGA-670B-0: None • WGA-670B-1: Interface to output BCD coded WGA-670B indication. • WGA-670B-7: Interface to connect the TEDS signal of the WGA-670B. Also equipped with RS-232C interface. Item A) in the above figure shows the WGA-670B-7.

  • Page 11: Connection

    2-2-3 Connecting Transducer • Connect a transducer to terminals from Nos. 1 to 5. (Cable colors described below are KYOWA’s standard color codes) No. 5: Bridge exciter plus (+) side (Red), No. 4: Bridge output minus (-) side (White) No.

  • Page 12: Connecting Control Input Terminal

    2-2-4 Connecting Control Input Terminal • Contact connection terminal is as follows. Internal Internal Exte rnal Exte rnal No. 6: Common terminal (COMMON) No. 7: Reset No. 8: Hold No. 9: ZERO • For using the external switches; ZERO, HOLD, and RESET, 1〜...

  • Page 13: Connecting Bcd Output (Wga-670B-1)

    2-2-7 Connecting BCD Output (WGA-670B-1) • See “6. BCD OUTPUT OPTION.” 2-2-8 Connecting RS Output (WGA-670B-7) • See “7. RS-232C OPTION.” 2-2-9 Connecting TEDS Signal (WGA-670B-7) • See “8. TEDS OPTION.”...

  • Page 14: Basic Operation Flow

    3. BASIC OPERATION FLOW Procedures for operating the WGA-670B are roughly described in the following. For details, see “4. OPERATION & FUNCTIONS.” Item Outline of Operation Power ON and the WGA-670B is in measuring mode. (1) Power ON (See “4-1-1 Key Operation in Measuring Mode (Setting [LOCK])” Press the FUNCTION key 2 seconds or more to activate the function selecting (2) Changing Mode mode.

  • Page 15: Operation & Function

    4. OPERATION & FUNCTION 4-1 KEY OPERATION 4-1-1 Key Operation in Measuring Mode (Setting [LOCK]) • Power ON the WGA-670B and the measuring mode is activated in [LOCK] state. • In the measuring mode, the WGA-670B measures load, pressure, torque, displacement and other physical quantities by combining with a strain gage type transducer and indicates the measured values on the indicator.

  • Page 16: Key Operation In Function Selecting Mode

    4-1-2 Key Operation in Function Selecting Mode • Press the FUNCTION key for 2 seconds in the measuring mode to activate the function selecting mode. At this time, function ‘F-01’ is indicated on the indicator. • By pressing the → key or SHIFT + ← keys in the function selecting mode, various functions are selected from ‘F-01’...

  • Page 17: Function

    4-2 FUNCTION 4-2-1 Various Functions in Function Selecting Mode • Function selecting mode has the following 14 functions. F-01: Original value F-08: Additional Value F-02: Actual Load Calibration F-09: Automatic ZERO Compensation F-03: Sensitivity Registering Calibration F-10: Hysteresis F-04: Hold Mode F-11: BCD Output Logic F-05: Self Check F-12: Initialize...
  • Page 18 Function Key operation & WGA-670B Functional Function Name Selecting Mode Movement in Function Setting Mode Description F-02 Actual Load ●The indication ‘00628’ or ‘11111’ is a Calibration key code to prevent calibration value from carelessly changing due to malfunction. F-03 Sensitivity Set transducer rated output (Unit: mV/V) •A function that...
  • Page 19 The checked results are indicated as Good: Normal shown in the right. E-01: RAM failure E-02: Flash memory ●If any faulty results appear on the indicator, contact KYOWA or our failure representatives. F-06 Analog Output Set the indication to set the analog output •A function that...
  • Page 20 Function Key Operation & WGA-670B Functional Function Name Selecting Mode Movement in Function Setting Mode Description •A function that F-07 Smoothing Indicates the following items (1), (2), and stables the (3). indication by smoothing (1) Number of (2)Minimum Scale varying signals Moving Averages issued from the transducer.
  • Page 21 Function Key Operation & WGA-670B Functional Function Name Selecting Mode Movement in Function Setting Mode Description F-09 Automatic ZERO Set ZERO compensation range and press •ZERO Compensation the SET key. compensation Next, set the determination time and range and press the SET key. determination time Then, set ZERO near ZERO and press range...
  • Page 22 Function Key Operation & WGA-670B Functional Selecting Mode Function Name Movement in Function Setting Mode Descriptio Initialize F-12 •Key code enable setting • A ‘00000’ is indicated. function Here, set the indication to read ‘00628’ or ‘11111’ that and press the SET key. The following set values returns return to the factory default state.
  • Page 23 Function Key Operation & WGA-670B Functional Function Name Selecting Mode Movement in Function Setting Mode Description BV set value 0: 10 V F-13 BV Select •A function that 1: 2 V selects bridge exciter voltage. Select either of the two and press the SET •It is set to 1(2 V) key.

  • Page 24: Digital Zero Function

    4-2-2 Digital ZERO Function Digital ZERO function is a function that decides the reference point of the indicator. It is as same as setting the scale needle to ‘0’ position. There are 2 methods for deciding the reference point (ZERO), by key operation and by operation of contact input from the rear panel.

  • Page 25: Setting High/Low Comparator & Hysteresis

    4-2-3 Setting High/Low Comparator & Hysteresis High/low limit comparator and hysteresis function serve to compare the indicated value with the set value and outputs the compared results. The result of comparison is obtained as open collector output from the rear terminal board and indicated on the [HIGH]/[LOW] LED on the front panel.

  • Page 26: Sensitivity Registering Calibration Function

    4-2-4 Sensitivity Registering Calibration Function Sensitivity registering calibration function is a function that conducts calibration by registering the rated output of the transducer without applying the actual load. Description shall be made with an example when ‘1.000’ is indicated by applying 1 kN of load using a transducer having rated capacity of 1 kN and rated output of 2.004 mV/V.

  • Page 27: Hold Function

    4-2-5 Hold Function Hold function is a function that serves to set various hold modes. Besides, this function is capable of setting display mode as well as comparison mode. The hold function becomes enabled by the following 2 operations, key operation and operation of contact input from the rear panel.
  • Page 28 4-2-5-1 Arbitrary Point Hold Mode • Press the HOLD key and after the lapse of delay time, the indication is kept hold until it is pressed the next time. • Or, when the [HOLD] signal from the rear terminal board is turned ON (close) and after the lapse of delay time, the indication is kept hold until the [HOLD] is signal is turned OFF.
  • Page 29 4-2-5-3 Block Specified Peak Hold Mode a) For normal display mode • Press the HOLD key and after the lapse of delay time, the peak value is indicated. Press the HOLD key the 2nd time and the peak value is kept hold. Press the HOLD key the 3rd time and the peak hold mode is canceled.
  • Page 30 b) Hold display mode • Press the HOLD key and the indication of that time is kept hold. After the lapse of delay time, although it is not shown on the indicator, the WGA-670B is in peak value detecting state. Press the HOLD key the 2nd time and the peak hold until then is indicated.
  • Page 31 4-2-5-4 Time Specified Peak Hold Mode a) Normal display mode • Press the HOLD key and after the lapse of delay time, the peak value is detected and kept hold for the preset specified time. Press the HOLD key the 2nd time and the peak hold mode is canceled. •...
  • Page 32 b) Hold Display Mode • Press the HOLD key and the indicated value is kept hold. After the lapse of delay time, the peak value is detected and indicated for the preset specified time. Press the HOLD key the 2nd time and the hold display mode is canceled. •...

  • Page 33: Operation Timing

    5. OPERATION TIMING 5-1 CONTROL INPUT (HOLD, RESET, ZERO) Cancels Cancels Starts Starts digital ZERO digital ZERO digital ZERO digital ZERO Starts Starts Starts Cancels Cancels operation operation operation operation the hold operation the hold operation the hold operation the hold operation the hold operation Operating Status Operating Status...

  • Page 34: High/Low Limit Comparator Output

    5-2 HIGH/LOW LIMIT COMPARATOR OUTPUT Higher limit Higher limit Hysteresis Hysteresis Hysteresis Hysteresis Lower limit Lower limit Input Signal Input Signal Higher limit output Higher limit output Lower limit output Lower limit output T1: 4ms(Max) ...... A delay time required, starting from the time when the input value exceeds the high limit comparative value preset on the comparator until the high limit output becomes ON.

  • Page 35: Bcd Output Option

    Data 8000 Not used *1: Used for adjusting the instrument at KYOWA factory prior to shipment. They should not be used by the operator. (Note) Since bits 4 and 8 of the highest order digits are not output, apply appropriate processing on the external side.

  • Page 36: Setting Bcd Output

    6-3 SETTING BCD OUTPUT The number of output times, data logic, and EOC logic are set with the function selecting mode ‘F-11.’ Since the hold input and output prohibit input are set to negative logic, no change is allowed. ‘F-11’ indication: (1) Output times – (2) Data logic – (3) EOC logic (1) Setting the Number of Output Times The first numeric value (1) indicated with the function selecting mode ‘F-11’...

  • Page 37: Signal Timing

    6-5 SIGNAL TIMING Signal operation timing is described in the following figure. To read data by EOC (End of Conversion), when it is set to negative logic, read BCD data, polarity data, and over data within 4ms from rising (positive) edge (when it is changed from “L” to “H”). To read data after conducting BCD data hold, set the data hold input to “L”...

  • Page 38: Rs-232C Option

    7. RS-232C OPTION 7-1 OUTLINE With the WGA-670B-7 (Equipped with TEDS interface + RS-232C interface), various functions can be set and measured values can be read from external devices. 7-2 RS-232C INTERFACE This section describes details of the RS-232C interface. (1) Connector Pin No.
  • Page 39 (3) Connecting to External Devices a) Connection cable For connecting the WGA-670B to the PC, etc., use a commercially available RS cross cable (reverse type). (For reference, KRS-DOSV9C07K, KRS-403XFO7K, etc.: SANWA SUPPLY LTD. made) WGA side PC side (Note) Do not forget to power OFF both WGA-670B and the external devices before connection. Or, correct operation may not be obtained or may cause damage.

  • Page 40: Outline Of Control Command

    7-3 OUTLINE of CONTROL COMMAND This section describes format and types of control commands issued from the PC to the WGA-670B. (1) Control Command Code • Command is in ASCII code with 3 characters. • Attached with parameters according to command characteristics.
  • Page 41 (2) List of Control Commands Type Contents Command Page Reads the measured value. Reads the status. Reading Reads various set values. Monitors the original value. Hold function Hold reset function Measurement Auto-ZERO function ZAD* Self check function Actual load calibration Sensitivity registering calibration Automatic sensitivity registration with TEDS Sets hold mode.

  • Page 42: Details Of Various Control Commands

    7-4 DETAILS of VARIOUS CONTROL COMMANDS This section describes details of various control commands and parameters that are following the commands. (<CR>,<CR><LF> represent termination code.) (1) [RES] Contents: Initialize (Relevant to panel operation F-12.) Format: RES0628<CR> Key code (Input ‘0628’ regardless of enable/disable of the key code.
  • Page 43 (4) [MOD] Contents: Sets transmission mode Format: MODpp<CR> Parameter: pp (Transmission mode) • 00: Repeatedly outputs the indicated value and status. • 02: Outputs the indicated value and status only once at hold mode. • 10: Operation by control command. Description &...
  • Page 44 (5) [/M] Contents: Writes the settings to non-volatile memory. Format: ********/M<CR> Corresponding command Description & others: Add ‘/M<CR>’ at the end of the determined command. Then, it is stored in the non-volatile memory. If the power is turned OFF, the contents determined without this command shall return to the original setting.
  • Page 45 (8) [PRR] Contents: Outputs set value. Format: PRRppp<CR> Parameter: 010: Sensitivity registering value 020: Smoothing 030: Additional value 050: Hysteresis set value 051: Comparator H set value 052: Comparator L set value 053: Spare 054: Spare 070: Hold mode 090: Auto-ZERO compensation set value 100: Option Return value format: a) Return value of sensitivity registering value...
  • Page 46 f) Return value of hold mode a, b, c,x.xx,yy.yy<CR><LF> Specified (second) Delay time (second) Comparison mode Display mode Hold mode • See SMF command. g) Return value of auto-ZERO compensation set value xxxxxx,y.y.z<CR><LF> ZERO near ZERO range Definition time Indicates ZERO range and indicated value with a decimal point. If the indicated value has no decimal point, it is filled with ‘0’...
  • Page 47 (11) [EIC] Contents: Conducts sensitivity registering calibration. (Relevant to panel operation F-03) Format: EIC0x.xxx, ±yyyyyy<CR> Parameter: 0x.xxx, ±yyyyyy Indicates the indicated value with a decimal point. If the indicated value has no decimal point, it is filled with ‘0’ from the head. Sensor rated output value (mV/V) Return value format: ok<CR><LF>...
  • Page 48 (14) [SSM] Contents: Set smoothing, moving average and minimum resolution. (Relevant to panel operation F-07.) Format: SSM3a00, b, c<CR> Parameter: 3a00, b, c Analog filter Minimum Resolution 0: 100 Hz Moving Average 0: 1 1: 10 Hz 0: None 1: 2 1: 8 times 2: 5 2: 16 times...
  • Page 49 (17) [OP1] Contents: Set analog output (A/D output). (Relevant to panel operation F-06.) Format: OP1020, ±xxxxxx,±yyyyyy<CR> Parameter: ±xxxxxx,±yyyyyy Indicated value at 10 volts output Indicated value at 0 volt output. • Both indicated values include decimal point. If the indicated value has no decimal point, it is filled with ‘0’...
  • Page 50 (20) [LCK] Contents: Set keylock Format: LCKa<CR> Parameter: 0: Cancels keylock 1: Sets keylock Return value format: ok<CR><LF> Description & others: This command becomes disabled with the power OFF. (21) [ZAD] Contents: Auto-ZERO function Format: ZAD<CR> Parameter: None Return value format: ok<CR><LF>...

  • Page 51: Teds Option

    8. TEDS OPTION 8-1 OUTLINE By connecting the TEDS (Transducer Electronic Data Sheet) built-in sensors to the WGA-670B-7, the most appropriate sensitivity registration is automatically available. Connecting up to 4 sensors of the same standard is available. 8-2 CONNECTION Connect TEDS signal sensors to the following terminal boards Nos. 21 and 22 on the rear panel as shown in the following figure.

  • Page 52: Operation

    8-3 OPERATION There are 3 methods for automatically registering sensitivity by reading the sensor information. One is to automatically register the sensitivity with the power ON. The second is to register the sensitivity by panel key operation. And the third is to send command from the PC that is connected to RS-232C port. Operations of the respective methods are described in the following.
  • Page 53 (3) Automatic sensitivity registration by receiving command By connecting the WGA-670B to the PC using RS-232C interface, the automatic sensitivity registration command is received via RS-232C interface from the PC For details of PC connection, see “7. RS-232C OPTION.” The command of the automatic sensitivity registration is described in the following. Command: EID<CR>...

  • Page 54: Specifications

    9. SPECIFICATIONS 9-1 SPECIFICATIONS Model Name ........WGA-670B Number of Measuring channels ..1 Applicable Transducer ......Strain Gage Transducer Applicable Bridge Resistance ..... 87.5 Ω to 10 kΩ (350 Ω connecting four WGA-670Bs in parallel) Bridge Exciter ........10 VDC, 2 VDC Measuring Range .......±3.2 mV/V (In gross weight) Zero Adjusting Range ......
  • Page 55 Power Supply ........100 to 240 VAC ±10% 50/60Hz single phase, 20 VA or less Dimensions ........96(W) × 96(H )× 139(D) (Protruded portion not included) Weight ..........Approximately 1.1kg (WGA-670B-0) Notation ..........English or Japanese EMC Standard ........EN61326-1 (Class A) Safety Standard ........EN61010-1 (Installation category: II, Pollution degree: 2)

  • Page 56: Outside Drawing

    9-2 OUTSIDE DRAWING (1) With No Option (WGA-670B-0)
  • Page 57 (2) With BCD Option (WGA-670B-1)
  • Page 58 (3) With RS+TEDS Option (WGA-670B-7)

  • Page 59: Error Code List

    E-00 exceeding the allowable range. indication less than 10000 per 0.1 mV/V. E-01 Memory (RAM) failure Failure Contact KYOWA representatives for repair. E-02 Memory (EEP ROM) failure TEDS automatic sensitivity See item (4) in “8. TEDS registration failure OPTION”...

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Wga-670bWga-670b-1Wga-670b-7

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