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KYOWA WGA-680A Series Instruction Manual

Instrumentation amplifier
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Generally, company names and trade names described in this Instruction Manual are trademarks or registered
trademarks of the companies.
This Instruction Manual may not be copied or reproduced, in whole or part, without consent of KYOWA.
Copyright © Kyowa Electronic Instruments Co., Ltd. All rights reserved.
The contents of the Instruction Manual are subjected to change without prior notice.
We assume no responsibility whatever for any damage resulting from the use of this product.
INSTRUMENTATION AMPLIFIER
Thank you for purchasing KYOWA's product WGA-680A Instrumentation
Amplifier.
Read this Instruction Manual carefully in order to make full use of the high
performance capabilities of the product.
Do not use the product in methods other than described in this Manual.
INSTRUCTION MANUAL
IM-A-1048H April 2019
WGA-680A

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Summary of Contents for KYOWA WGA-680A Series

  • Page 1 Generally, company names and trade names described in this Instruction Manual are trademarks or registered trademarks of the companies. This Instruction Manual may not be copied or reproduced, in whole or part, without consent of KYOWA. Copyright © Kyowa Electronic Instruments Co., Ltd. All rights reserved.

  • Page 2: Table Of Contents

    IM-A-1048H CONTENTS CONTENTS STANDARD ACCESSORIES OPTIONAL ACCESSORIES SAFETY PRECAUTIONS (Do not forget to read the safety precautions prior to use.) LIMITED LIDE PARTS AND PREVENTIVE MAINTENANCE WGA-680A REPLACEMENT BEFORE THE END OF SERVICE LIFE NOTATIONS USED IN THE INSTRUCTION MANUAL IMPORTANT PRECAUTIONS WHEN USING WGA-680A PRECAUTIONS ON CE MARKING 1.
  • Page 3 IM-A-1048H 4-9. DISPLAY STABILITY FUNVTION 4-10. HOLD FUNCTIONS 4-10-1. Arbitrary point hold 4-10-2. Peak hold, bottom hold 4-10-3. Peak-to-peak hold (amplitude hold) 4-10-4. Interval-specified peak hold, interval-specified bottom hold, interval-specified peak-to-peak hold 4-10-5. Time-specified peak hold, Time-specified bottom hold, Time-specified peak-to-peak hold 4-11.
  • Page 4 IM-A-1048H This Manual describes the WGA-680A Instrumentation Amplifier (hereinafter referred to as the WGA-680A). STANDARD ACCESSORIES The following accessories are packed with the WGA-680A. When unpacking, check the contents to ensure that all accessories are enclosed. Instruction Manual 1 (CD-R) (For WGA-680A, For BCD/RS-232C/RS-485/TEDS, For CC-Link) Product Warranty 1 each...
  • Page 5 PRIOR TO USE For safe use of the product, do not forget to read the "SAFETY PRECAUTIONS" prior to use. KYOWA assumes no liability for any damage resulting from the user's failure to comply with the safety precautions. For safety operation of the product, the following symbol marks are used in the Instruction Manual.
  • Page 6 IM-A-1048H CAUTION Caution Be sure to observe the safety precautions described in the WGA-680A Instruction Manual. Do not use the product outdoors. Or, it may cause electric shock, fire hazard, lower the performance and cause troubles. Do not turn ON the power switch immediately after turning it OFF. After turning OFF the power switch, wait (5 seconds) until the power supply is shut OFF before turning ON the power switch again.

  • Page 7: Limited Lide Parts And Preventive Maintenance

    To operate the product normally, finding a sign of the product failure early by daily/periodic inspections and taking the corrective action are required. For inspection, contact KYOWA or our representatives. * Limited life parts used with the product are aluminum electrolytic capacitor.

  • Page 8: Important Precautions When Using Wga-680A

    IM-A-1048H IMPORTANT PRECAUTIONS WHEN USING WGA-680A NOTE The output signal (voltage/current) when the transducer cable is broken. When the transducer cable is broken, the WGA-680A may output the following output signal (voltage/current). Therefore, take countermeasures to avoid the adverse effect, from the output signals, on the other measuring instruments.

  • Page 9: Outline Of Product

    Actual load calibration, Sensitivity registering calibration, Numeric value registering calibration Various optional models: BCD/TEDS model, RS-232C/TEDS model, RS-485/TEDS model, CC-Link model 1-3. MODEL The WGA-680A series has 8 models. Customers are required to purchase the power cable applied for your power supply specifications. Model Option...

  • Page 10: Controls And Functions

    IM-A-1048H 2. CONTROLS AND FUNCTIONS 2-1. FRONT PANEL (10) (1) Indicator Measured values, various selected functions, and pre-set values is displayed. Normally, the measured value responding to the output from transducers is displayed. However, if error occurs, error message is displayed. For details, see "4-12-2.

  • Page 11: Rear Panel

    IM-A-1048H 2-2. REAR PANEL *Figure is AC model. (1) Blank panel Blank panel is for WGA-680A-00. In the case of optional model, the panel is the slot of optional model. For details, see separate volume of "INSTRUCTION MANUAL (FOR BCD/RS-232C/RS- 485/TEDS OPTIONS)"...

  • Page 12: Connection And Default Setting

    IM-A-1048H 3. CONNECTION AND DEFAULT SETTING 3-1. PROCEDURES FOR MEASUREMENTS This section describes necessary operations to be conducted prior to the actual measurements. Section 3-2 To mount the WGA-680A on the panel Mount the WGA-680A on the panel. Section 3-3 To connect transducers Connect various transducers to the WGA-680A.

  • Page 13: To Mount The Wga-680A On The Panel

    IM-A-1048H 3-2. TO MOUNT THE WGA-680A ON THE PANEL To mount the WGA-680A on the panel, prepare a panel according to the specified panel cut dimensions as shown at the right. Then, mount the WGA-680A by referring the following procedures. (1) Cut out the panel according to the panel cut dimensions.

  • Page 14: To Connect Transducers

    To prevent electric shock hazards, be sure to use the terminal block cover. 3-3-2. To connect transducers Connect transducers to terminals A to E as described in the following. (Cable colors are KYOWA's standard color codes.) A: Bridge excitation (+) Red cable B: Bridge output (-)

  • Page 15: To Connect [Input] Terminals

    IM-A-1048H 3-4. TO CONNECT [INPUT] TERMINALS Connection of [INPUT] terminals are as follows. : Common : ZERO command : HOLD command : RESET command To connect an external switch, open collector, etc. to each [INPUT] terminal, connect as described in the right figure. Connect cables as follows.

  • Page 16: To Connect [Analog Output] Terminals

    IM-A-1048H 3-6. TO CONNECT [ANALOG OUTPUT] TERMINALS The pins and signals of the [ANALOG OUTPUT] terminals are as follows. : Common : Voltage output terminal (±10 V) : Current output terminal (4 to 20 mA) NOTE Countermeasures against noise for [INPUT]/[OUTPUT]/[ANALOG OUTPUT] terminals For more than 1 m long wiring, use twisted cable.

  • Page 17: To Connect Power Supply

    IM-A-1048H 3-7. TO CONNECT POWER SUPPLY 3-7-1.WGA-680A-00~04 (AC models) Do not forget to check that power voltage is from 100 to 240 VAC, 50/60 Hz (20 VA). Be sure to use the cable with rated voltage having more than power supply voltage. Please do not press the terminal block too strongly.

  • Page 18: 3-7-2.Wga-680A-10~14 (Dc Models)

    IM-A-1048H 3-7-2.WGA-680A-10~14 (DC models) Do not forget to check that power voltage is from 10 to 30 VDC (10W). Be sure to use the cable with rated voltage having more than power supply voltage. Please do not press the terminal block too strongly. WARNING To prevent electric shock hazards, be sure to use the terminal block cover.

  • Page 19: Operations And Functions

    IM-A-1048H 4. OPERATIONS AND FUNCTIONS 4-1.KEY OPERATIONS 4-1-1. Lock function The LOCK function is used to prohibit the change in pre-set values in order to prevent erroneous operation. In the [LOCK] status, you are not able to change the function and limit values ([HI] limit value, [LO] limit value, etc.).

  • Page 20: Key Operations In Function Selecting Mode

    IM-A-1048H 4-1-3. Key operations in FUNCTION SELECTING mode To go to the FUNCTION SELECTING mode, press the FUNCTION key for 2 seconds in the MEASURING mode. The "F-01" is displayed on the indicator and you are able to select functions. To select the functions from "F-01"...

  • Page 21: To Select Bridge Excitation Voltage

    IM-A-1048H 4-2. TO SELECT BRIDGE EXCITATION VOLTAGE You are able to select the bridge excitation voltage either 2 V or 10 V applied to the transducers. Select the higher voltage within the recommended excitation voltage range of the transducers. The factory default setting is 2 V. a) To go to SELECTING BRIDGE EXCITATION VOLTAGE mode Press the FUNCTION key for 2 seconds.

  • Page 22: Calibration Function

    IM-A-1048H 4-4. CALIBRATION FUNCTION There are 3 calibration functions appropriate for the required purpose, that is, "Actual load calibration" that calibrates data by applying already known load to transducers, "Sensitivity registering calibration" that calibrates data by registering a sensitivity value written in the transducer inspection report, and "Numeric value registering calibration"...
  • Page 23 IM-A-1048H 4-4-2. Sensitivity registering calibration The sensitivity registering calibration calibrates data by registering a rated output of a transducer without applying the actual load. Suppose a load cell is "rated capacity: 1 kN" and "rated output: 2.004 mV/V." This section describes how to display "1.000"...
  • Page 24 IM-A-1048H 4-4-3. Numeric value registering calibration The numeric value registering calibration calibrates data by changing the initial value. Execute the numeric value registering calibration after the actual load calibration or sensitivity registering calibration. The numeric value registering calibration is used for pressure transducers for absolute pressure measurement or when already load is applied and unable to obtain the actual load state.
  • Page 25 IM-A-1048H 4-5. COMPARATOR FUNCTIONS The COMPARATOR function compares the indicated value with the [HH]/[HI]/[LO]/[LL] limit value and outputs the results. The COMPARATOR function outputs the result as the open collector output from the [OUTPUT] terminals of the rear panel. The results are displayed on the [HH]/[HI]/[OK]/[LO]/[LL] LED. You are able to prevent the comparator output chattering or malfunctions by setting the hysteresis (dead band).
  • Page 26 IM-A-1048H 4-5-3. To set the [LL] limit value and [LO] limit value 1) Press the LO LL key for 2 seconds in the MEASURING mode. The current value of the [LO] comparator is displayed and the highest-order digit flickers. At this time, the [LO] LED flickers. 3) To set the [LO] limit value, press the SET key.
  • Page 27 IM-A-1048H 4-6. PATTERN FUNCTION You are able to register the [HH]/[HI]/[LO]/[LL] limit values in 4 operation patterns (pattern 0 to pattern 3). You are able to select the target pattern by the key operations. a) To select operation patterns Select the operation patterns. For details, see "F-20"...
  • Page 28 IM-A-1048H 4-8. UPDATING RATE OF DISPLAYING VALUES Generally, the WGA-680A displays thinning data for approx. 15.6 times/sec. With high-response phenomena, rapidly-changing indicated values make it difficult to read. In such a case, by decreasing the updating-rate of display values, you are able to read values much easier. a) Key operation Press the FUNCTION key for 2 seconds.
  • Page 29 IM-A-1048H a) HOLD modes (1) Arbitrary point hold When the HOLD command is turned ON and after the lapse of delay time, the WGA-680A holds the measured value at that moment (arbitrary point) until the HOLD command is turned OFF. (2) Peak hold When the HOLD command is turned ON and after the lapse of delay time, the WGA-680A detects and displays the peak value until the HOLD command is...
  • Page 30 IM-A-1048H b) Comparison Mode (1) Normal comparison mode The comparator always compares regardless the detecting interval and the hold interval. (2) Hold comparison mode The comparator doesn’t compare in normal measuring mode and the detecting interval, and compares in holding interval. Suppose the mode has no hold interval like the peak hold, the setting is ignored.
  • Page 31 IM-A-1048H 4-10-1. Arbitrary point hold The WGA-680A holds the instantaneous value and displays it. Key operation The WGA-680A holds the instantaneous value, when the HOLD key is pressed and after the lapse of delay time. The WGA-680A holds the instantaneous value until the HOLD key is pressed again. Control input The WGA-680A holds the instantaneous value when the HOLD command is turned ON and after the lapse of delay time.
  • Page 32 IM-A-1048H 4-10-2. Peak hold, bottom hold Peak hold : The WGA-680A displays the peak value during the detecting interval. Bottom hold : The WGA-680A displays the bottom value during the detecting interval. Key operation The detecting interval starts when the HOLD key is pressed and after the lapse of delay time. When the HOLD key is pressed for the second time, the detecting interval ends.
  • Page 33 IM-A-1048H 4-10-3. Peak-to-peak hold (amplitude hold) The WGA-680A detects the difference (amplitude), between the peak value and bottom value, and displays the peak-to-peak value of the difference. Key operation The detecting interval starts when the HOLD key is pressed and after the lapse of delay time. When the HOLD key is pressed for the second time, the detecting interval ends.
  • Page 34 IM-A-1048H 4-10-4. Interval-specified peak hold, interval-specified bottom hold, interval-specified peak-to-peak hold Interval-specified peak hold The WGA-680A detects the peak value during the detecting interval and displays the value during the holding interval. Interval-specified bottom hold The WGA-680A detects the bottom value during the detecting interval. Interval-specified peak-to-peak hold The WGA-680A detects the difference, between the peak value and bottom value, during the detecting interval and displays the value during the holding interval.
  • Page 35 IM-A-1048H (2) Hold display mode Key operation When the HOLD key is pressed, the WGA-680A holds the value at that time. The detecting interval starts after the lapse of delay time. When the HOLD key is pressed for the second time, the detecting interval ends and the holding interval starts.
  • Page 36 IM-A-1048H 4-10-5. Time-specified peak hold, Time-specified bottom hold, Time-specified peak-to-peak hold Time-specified peak hold The WGA-680A detects the peak value during the detecting interval and displays the value during the holding interval. Time-specified bottom hold The WGA-680A detects the bottom value during the detecting interval and displays the value during the holding interval.
  • Page 37 IM-A-1048H (2) Hold display mode Key operation When the HOLD key is pressed, the WGA-680A holds the value at that time. The detecting interval starts after the lapse of delay time. When the HOLD key is pressed for the second time, the holding interval ends. The WGA-680A displays values as normal.
  • Page 38 IM-A-1048H 4-11. ANALOG OUTPUT (D/A) FUNCTION The ANALOG OUTPUT function converts the measured value to the output signal (voltage): ±10V or output signal (current): 4 to 20mA. When the output signal (voltage) is 0 to 10 V, the output is 4 to 20 mA fixed. a) Key operation Press the FUNCTION key for 2 seconds.
  • Page 39 IM-A-1048H 4-12. LIST OF FUNCTIONS 4-12-1. Various functions in FUNCTION SELECTING mode The FUNCTION SELECTING mode has the following functions F-01: Original value F-16: RS communication settings F-02: Actual load calibration F-17: Device ID F-03: Sensitivity registering calibration F-18: CC-Link F-04: Hold mode F-19: Numeric value registering calibration F-05: Self-check...

  • Page 40: Actual Load Calibration

    IM-A-1048H Table: FUNCTION SELECTING mode and various functions FUNCTION Functional description, Key operation and WGA-680A movement SELECTING supplements in SETTING mode MODE F-01 The ".." is displayed. A function that displays the Original value raw output value of the To display the current input value transducer.

  • Page 41: Sensitivity Registering Calibration

    IM-A-1048H FUNCTION Functional description, Key operation and WGA-680A movement SELECTING in SETTING mode supplements MODE F-03 A function that conducts Sensitivity (See below figures) calibration by registering registering the rated output and rated (1) Rated output calibration capacity of the transducer Set the rated output (mV/V) without applying the actual of the transducer and...
  • Page 42 To execute the self-check, press the SET key. All LEDs results. flicker. The self-check results is displayed as described at Good: Normal the right. E-01: RAM failure E-02: Flash memory If faulty self-check results is displayed on the indicator, failure contact KYOWA or our representatives.
  • Page 43 IM-A-1048H FUNCTION Functional description, Key operation and WGA-680A movement SELECTING in SETTING mode supplements MODE F-06 With the "1: Automatic Analog output (See below figures) setting", the calibrated (D/A) scaling value is automatically set (1) Automatic scaling as the FULL-SCALE 0: Manual setting indicated value.
  • Page 44 IM-A-1048H FUNCTION Functional description, Key operation and WGA-680A movement SELECTING in SETTING mode supplements MODE F-08 A function that adds the Additional value Set the additional value and desired numeric value to press the SET key. the measured value for Range: ±99999 (Initial value: 0) displaying.
  • Page 45 IM-A-1048H FUNCTION Functional description, Key operation and WGA-680A movement SELECTING in SETTING mode supplements MODE F-12 <To enable the key code> A function that returns the Initialize The "00000" is displayed. pre-set values to the Set the "00628" or factory default. "11111"and press the SET key.

  • Page 46: Numeric Value Registering Calibration

    IM-A-1048H FUNCTION Functional description, Key operation and WGA-680A movement SELECTING in SETTING mode supplements MODE F-19 The calibration-zero value A function that re-sets the Numeric value (mV/V) is displayed. calibration-zero value (a registering Set the initial value of the transducer. standard zero point).
  • Page 47 IM-A-1048H FUNCTION Functional description, Key operation and WGA-680A movement SELECTING in SETTING mode supplements MODE F-23 The pre-set value is displayed. Assign "High limit" or [HH] 0: High limit (Initial value) "Low limit" to [HH] Comparator 1: Low limit comparator as comparator- (Comparator-3) Set the value and press the SET key.
  • Page 48 Use the sensitivity registering value 10000 or less The sensitivity registering value is exceeding E-00 per 0.1 mV/V. the specified range. E-01 RAM Failure Failure Contact KYOWA or our representatives for E-02 Flash memory Failure repair. Check that the TEDS transducer is correctly E-03 TEDS Failure connected.

  • Page 49: Table Of Functions

    IM-A-1048H 4-12-3. Table of functions Initial Functions Initialize Parameters Digits Options/ranges Remarks values F-01 Original The current input value (mV/V) is value displayed. F-02 Actual load Rated value -99999 to +99999 4000 Linked to the sensitivity registering calibration calibration. Decimal point 10e0 None None...
  • Page 50 IM-A-1048H Initial Functions Initialize Parameters Digits Options/ranges Remarks values F-04 Hold mode Hold mode 10e2 Tracking Normal measurements Arbitrary point Sample hold hold Peak Hold Peak Hold (PH) Interval-specified Interval-specified peak hold Time-specified Time-specified peak hold Bottom hold Bottom hold (BH) Interval - Interval -specified bottom hold...
  • Page 51 IM-A-1048H Digi Initial Functions Initialize Parameters Options/ranges Remarks values F-07 Smoothing The number of 10e2 0 times None moving 2 times 2 times (0.5msec) 4 times 4 times (1msec) average times 8 times 8 times (2msec) 16 times 16 times (4msec) 32 times 32 times (8msec) 64 times...
  • Page 52 IM-A-1048H Initial Functions Initialize Parameters Digits Options/ranges Remarks values F-16 For details, see the communication "INSTRUCTION MANUAL (FOR settings BCD/RS-232C/RS-485/TEDS OPTIONS)". F-17 Device ID For details, see the "INSTRUCTION MANUAL (FOR BCD/RS-232C/RS-485/TEDS OPTIONS)". F-18 CC-Link For details, see the "INSTRUCTION MANUAL (FOR CC-LINK OPTION)".

  • Page 53: Operation Timing

    IM-A-1048H 5. OPERATION TIMING 5-1. CONTROL INPUT SIGNALS (HOLD COMMAND, RESET COMMAND, ZERO COMMAND) 5-2. COMPARATOR OUTPUTS 5-3. DELAY TIME BETWEEN INPUT AND OUTPUT SIGNALS Delay times between the input and analog output (D/A) Maximum 12 ms...

  • Page 54: Trouble Shooting

    If the product is damaged due to any causes other than as written in the Instruction Manual or if the user has disassembled or remodeled the product, Kyowa Electronic Instruments Co., Ltd. may not be able to offer repair service.

  • Page 55: Maintenance

    An annual maintenance inspection is recommended to ensure the operation and measuring accuracy of the product. Must be returned to KYOWA for the scheduled maintenance inspection. (2) Replacement of consumable parts The aluminum electrolytic capacitor is a consumable item. The service life, depending on the frequency of use and temperature, is approximately 5 years under the usage at 25 .

  • Page 56: Specifications

    IM-A-1048H 8. SPECIFICATIONS (1) Number of channel (2) Applicable sensor Strain gage transducers (4-wire system) (4) Bridge excitation 10 VDC, 2 VDC, selectable (5) Measurement range ±3.2 mV/V (input range including zero adjustment range) (6) Zero adjustment range Within measurement range (not retained when power supply interrupted) (7) Nonlinearity Within ±...
  • Page 57 IM-A-1048H (16) Comparator function The number of points: 4 Pattern: Registers 4 groups of pattern files (comparative values) and enables switching through setting of functions Type: extra high [HH], high [HI], OK, low [LO], extra low [LL] Setting range: ±99999 Hysteresis width: 0 to 99999 Comparison mode: normal, at hold High/Low assignment:...
  • Page 58 IM-A-1048H (23) Power supply AC models AC 100 to 240 V 50/60 Hz Power consumption: 20 VA or less DC models DC 10 to 30 V Power consumption: 10 W or less (24) Dimensions 96(W) ×96(H) ×126(D) mm (Excluding protrusions) (25) Weight Approx 750 g (Without option) (26) Operating temperature range and humidity range...

  • Page 59: Outside Drawing

    IM-A-1048H 9. OUTSIDE DRAWING 9-1.WGA-680A -00: No option (AC model) Unit: mm...

  • Page 60: 9-2.Wga-680A -10: No Option (Dc Model)

    IM-A-1048H 9-2.WGA-680A -10: No option (DC model) Unit: mm...
  • Page 61 IM-A-1048H Kyowa Electronic Instruments Co., Ltd. 3-5-1, Chofugaoka, Chofu, Tokyo 182-8520 Japan http://www.kyowa-ei.com/...

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