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Showa 5683 Operation Manual

Ac bridge system dynamic strain amplifire
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MANUAL VER.No.1.01
AC BRIDGE SYSTEM DYNAMIC STRAIN AMPLIFIRE
MODELS ５６８３/５６８４
ＯＰＥＲＡＴＩＯＮ ＭＡＮＵＡＬ

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  • Page 1 MANUAL VER.No.1.01 AC BRIDGE SYSTEM DYNAMIC STRAIN AMPLIFIRE MODELS ５６８３/５６８４ ＯＰＥＲＡＴＩＯＮ ＭＡＮＵＡＬ...

  • Page 2: Introduction

    • Please let us know if there are any points that are unclear or missing in this manual. • We do not assume any responsibility for the outcome of the use of Models 5683/5684 amplifiers.

  • Page 3: Precautions

    PRECAUTIONS To avoid accidents, read this manual carefully before use. Observe the following warning and cautions when using amplifiers. The warranty does not apply any damage caused by the use against instructions, warnings, and cautions. To safely use the amplifiers, the following statements are used in this manual to call the readers' attention.
  • Page 4 (output signal wire). • Installation Category and Contamination Level Models 5683/5684 amplifiers are devices with Installation Category II and Contamination Level II. Use them following the regulations defined in Installation Category II and Contamination Level II.
  • Page 5 CAUTION • Caution in Handling When using this amplifier, always follow the precautions below. 1) Users Users who are not familiar with the operation of this recorder should avoid using it. 2) Use and storage environment The storage temperature and humidity of the input units is –20 to 70°C and 10 to 90%, respectively.
  • Page 6 6. This product uses a flash memory for saving setup values. Replacement of battery is not needed accordingly. 7. As Models 5683/5684 have AC signal bridge voltage. Amplifier unit whose bridge voltage frequency differs cannot be used in the same case. In addition, when using several units closely, always make synchronization.

  • Page 7: Warranty

    (4) Damage or faults caused by use or storage in environmental conditions that should be avoided. (5) Periodical calibration. (6) Damage or faults caused during transportation. 3. Liability We do not assume any liabilities for equipment other than SHOWA MEASURING INSTRUMENTS. ６...

  • Page 8: Table Of Contents

    TABLE OF CONTENTS INTRODUCTION ·········································································································· 1 Before Using Examining Contents in Package ············································································ 1 Cautions ················································································································· 1 PRECAUTIONS PRECAUTIONS ········································································································ 2 Warning ··················································································································· 3 Caution ··················································································································· 4 CAUTIONS IN HANDLING Cautions In Handling································································································ 5 WARRANTY Warranty ················································································································· 6 Limited Warranty ···································································································· 6 TABLE OF CONTENTS ·······························································································7 to 9 1.OVERVIEW 1.1 Features ···········································································································...
  • Page 9 3.3 Bridge Check Function ······················································································· 3-5 3.3.1 Overview ································································································· 3-5 3.3.2 Error Indication List upon Cable Disconnection and Short ························· 3-6 3.4 Cable Length Compensation Function ································································ 3-7 3.5 How to Switch Special Function Setting ······························································ 3-8 3.6 Case ················································································································· 3-9 3.6.1 Names of Case Elements ·········································································...
  • Page 10 9. REFERENCES 9.1 Frequency Characteristics and Phase Property ·················································· 9-1 to 9-2 9.2 Cable List ········································································································· 9-3 to 9-4 9.3 Dimensional outline drowing ·············································································· 9-5 9.3.1 Unit ········································································································· 9-5 9.3.2 Panel cut sizes ························································································· 9-6 9.3.3 Bench-top Case ······················································································ 9-7 9.3.4 Rack-mounting Case ··············································································...

  • Page 11: Overview

    Moreover they feature new functions such as cable length compensation and bridge checking, realizing higher-accuracy and higher-quality measurement and a reduction in measurement preparation time. Models 5683/5684 include an LED monitor and the auto-balancing function, thereby improving their operability. Table 1-1 introduces tow AC strain amplifiers models, Models 5683/5684,, which permit strain gauge-type transducers to perform physical value measurement.

  • Page 12: Accessories

    Models 5683/5684 can use the following optional devices and cases. Product Model Items Remarks ４∼20ｍＡ Output Unit 56-201 OUTPUT 2：４∼20ｍＡ Specified upon ordering 56-104 ４ＣＨ Bench Case ±CAL, BAL, KEYLOCK, and batch Bench Top Case 56-106 ６ＣＨ Bench Case 56-108 ８ＣＨ...

  • Page 13: Features Of Dynamic Strain Amplifiers

    This feature is advantageous in measurement using strain a gauge. Table 1-4 Recommended Sensors and Features Amplifier Type AC Strain Amplifier Model 5683 5684 − − ±10V at ±200×10 ±10V at ±200×10...

  • Page 14: Names And Functions Of Parts

    ２. NAMES AND FUNCTIONS OF PARTS (10) （９） (11) (12) (13) (14) (18) (15) (19) (16) (17) Fig.2-2 Rear panel Fig.2-1 Front panel 2.1 Names and Functions of Parts on Front Panel (See Table 2-1) Number Name Function Model Model indication Level meter (17-dot LED) This level meter monitors the output voltage of OUTPUT 1 4 .
  • Page 15 Number Name Function Bridge check Pressing the knob performs bridge check and cable length /Cable length compensation compensation, enabling automatic balancing of resistors /Auto-balance knob (BAL) and capacitance. For details, see page 2-6 Indication upon See pages 3-5 to 3-7 for bridge Balancing.
  • Page 16 This LED turns on while fine tuning is made. (11) Measuring range LED This LED displays measuring range from an output of 10V/200,000µε to 10V/200µε (for Model 5683)) (µε=10 strain). For the measuring range for Model 5684, refer to page 3-4 Measuring Range. (12) Calibration value setup knob Indicated value is calculated value based on input.
  • Page 17 The setting information is displayed on low-pass filter LED (17). Filter type: 4-pole Butterworth filter Cut-off frequencies: 10, 30, 100, 300, 500 Hz, W/B (for Model 5683) Cut-off frequencies: 10, 30, 100, 500 Hz, 3 kHz, W/B (for Model 5684) (17)

  • Page 18: How To Set Calibration Value (Cal)

    2.2 How to Set Calibration Value (CAL) The indicated value is calculated value based on input. The value can be set from 1µε to 9999µε by a step of 1µε (=10 ). Values should be set for each digit (Figure 2-3). Pressing calibration value setting knob (12) (Figure 2-4) turns on the fourth digit of calibration value LED (13).

  • Page 19: Indication Upon Balancing

    2.3 Indication upon Balancing Pressing BAL knob (4) executes bridge check and cable length compensation, thus automatically realizing both resistance balancing and capacitance balancing. While the bridge check and cable length compensation functions are effective (ON), the following indications appear. If there is bridge cable disconnection or short, the problematic location is indicated repeatedly on digital monitor (3).

  • Page 20: Names And Functions Of Parts On Rear Panel

    (10) (11) (12) (13) (14) (18) (15) (16) (17) (19) Fig.2-1 Front panel Fig.2-2 Rear panel 2.4: Names and Functions of parts on Rear Panel (See Table 2-2) Number Name Function Input connector (INPUT) The bridge box or a transducer is connected. Synchronization selection switch This switch is use to set the settings for bridge power (OSC)
  • Page 21 Number Name Function The output voltage and current are ±10 V and ±5 mA, Output connector 1 (OUTPUT1) respectively. This connector can be connected to a recorder (e.g. thermal-dot recorder or data acquisition devices) or A/D converter, which accept voltage signals The output voltage and current are ±10 V and ±10 mA, Output connector 2 (OUTPUT2)

  • Page 22: Before Measuring

    (3) Connect the bridge box or a transducer to the input connector connection information, see Cautions before Measuring on page 4-1. Since Models 5683/5684 automatically adjusts the voltage drop generated between the bridge and the amplifiers through the cable length compensation function, high-accuracy measurement is possible.

  • Page 23: Connections Of Power Supply Cable And Output Cable

    3.1.2 Connections of Power Supply Cable and Output Cable (See Fig. 3-2) (1) Use the power supply cable for 100 VAC (Model 0311-5112 for 110 VAC or higher), 200 VAC, or 12 VDC depending on the voltage. (2) Connect the output cable appropriate to the recorder to be used. (3) For more information, refer to Connection between Output and Load on page 4-8.
  • Page 24 (12) first, and then start measuring. The measuring range can be checked after applying a calibration value using the calibration value application switch (14). The measuring ranges for the amplifiers are described in Measuring Ranges for Models 5683/5684 on page 3-4. ３−３...

  • Page 25: Measurement Range

    1X to 2X Continuous Variable １０k ±４０,０００∼ ±８０,０００ ±１０,０００∼±２０,０００ 1X to 2X Continuous Variable ２０K ±８０,０００∼±２００,０００ ±２０,０００∼±５０,０００ 1X to 2.5X Continuous Variable Table3-1 Measurement Range of Model 5683 −６ Range×１０ Strain（±１０ＶFull Scale） Measurement Range Fine adjustment Knob⑨ ＢＶ＝０．５Ｖ ＢＶ＝２Ｖ ＬＥＤ⑪...

  • Page 26: Bridge Check Function

    3.3 Bridge Check Function 3.3.1 Overview The bridge check function of Models 5683/5684 amplifiers can detect a bridge cable disconnection, short, or cable disconnection. Since disconnected portions can easily be found, testing personnel can reduce the measurement preparation time or prepare countermeasures against cable disconnections.

  • Page 27: Error Indication List Upon Cable Disconnection And Short

    3.3.2 Error Indication List upon Cable Disconnection and Short Error indication in the case of disconnection Disconnection on bridge circuit Disconnection on cable INDICATION （Digital Monitor③） Good ○ ○ ○ ○ ○ ○ ○ ○ E-ab × ○ ○ ○ ○...

  • Page 28: Cable Length Compensation Function

    6-core cable or adjustment through values for the cable length or wire diameter. Models 5683/5684 employs a unique automatic compensation circuit in lieu of the conventional techniques, thereby enabling supplying the bridge power that reflects conductor resistance. Since high-accuracy strain measurement is possible, there are reductions in measurement time.

  • Page 29: How To Switch Special Function Setting

    3.5 How to Switch Special Function Setting By switching dip switches on the bottom face of Models 5683/5684 amplifiers, settings for special functions can be made. - ON/OFF for cable length compensation Front panel - ON/OFF for bridge check function...

  • Page 30: Case

    It is impossible to share a common case or synchronize between cases that have amplifiers installed with different bridge power frequencies. Take notice that the bridge power frequency of Model 5683 is 5 kHz and that of Model 5684 is 25 kHz. CAUTION Do not set two or more units to INT.
  • Page 31 It is impossible to share a common case or synchronize between cases that have amplifiers installed with different bridge power frequencies. Take notice that the bridge power frequency of Models 5683 is 5 kHz and that of Model 5684 is 25 kHz. CAUTION Do not set two or more units to INT.
  • Page 32 D) Synchronization of bridge power The master unit (INT) provides slave units (EXT) with the synchronization signal for bridge power. Settings such as bridge voltage, calibration value, filter, measurement range, bridge check ON/OFF, and cable length compensation ON/OFF are effective in each amplifier unit. E) Balancing for all units (1) Hold down the switch for BAL for all units (1).

  • Page 33: Heat Release For Case

    G) All unit key locking switch (3) Key locking is made for all amplifier units in a case by pushing up (ON) the key locking switch for all units (3). In this case, the all units key locking LED comes on. While key locking is effective, the BAL switch for all units (1) positioned in a case, BAL knob (4), measuring range selection knob (8), measuring range fine-tuning knob (9), calibration value selection knob (12), and filter selection (16) that are positioned on the front panel of each amplifier unit do not function.
  • Page 34 B) Using two or more rack-mounting cases In this case, install fans following the criteria below because the temperature in the unit rises depending on the number of stacks in the rack, load, and ambient temperature. Number of fan unit Note: What are harsh environmental conditions? Number of case under severe condition...

  • Page 35: Measurement

    ４. MEASUREMENT 4.1 Cautions before Measuring (Refer to Table 4-1) Before starting measurement, check the following points: Items Cautions Reasons The joints must be soldered, and the connectors must Prevents poor connections, noise, and be properly connected. instability in operation. The insulation resistance of strain gauges must be equal Prevents instability in operation as well as to or greater than 60 MΩ.

  • Page 36: Input Connection

    Do not turn the measurement range selector control (8) Prevents changing the amplitude of a preset or the measurement range fine adjustment control (9) calibration value. Operation of dynamic during measurement. (Use the keylock function.) strain amplifier Before using a low-pass filter, the operator should be Prevents reducing amplitude...
  • Page 37 Circuit Examples Bridge Box Wiring Remarks Bridge Method Configuration -Suited for where simple tension, compression, or bending force is applied -Suited for where changes in One-gauge ambient temperature are small configuration -Calculated using the calibration value as it is -Suited for where simple tension, compression, or bending force is applied -Strain-gauge-lead wires...
  • Page 38 -Detects tension and compression strain -Eliminates bending strain -Effects of changes in Opposite-arm, temperature are doubled two-active- -Strain-gauge-lead wires are gauge temperature-compensated. configuration -Calculated using calibration value x 1/2 or signal value x 1/2 -Detects tension and compression strain -Eliminates bending strain -Temperature compensation Four-active -Calculated using calibrated...

  • Page 39: Bridge Box

    4.2.2 Bridge Box The bridge box comprises a terminal box, a cable, and a connector. The terminal box has terminals for connecting strain gauges and contains high-precision resisters (e.g., 120 Ω for 5370). The bridge circuit is formed by connecting one strain gauge or more to the terminals. The following four types of bridge boxes are now available.
  • Page 40 a. As shown in Fig. 4-1, pins A and C are provided for the bridge power supply, and pins B and D are provided for the input to the amplifier unit. Pin E is the common terminal. b. This is a bridge for measuring strain. Various methods are used for connecting strain gauges.

  • Page 41: Measurement With Transducer

    4.2.3 Measurement with Transducer In most strain-gauge-based transducers, the physical amount to be measured is applied to an elastic part, and the resulting deformation is converted into an electrical amount. This elastic part is called the sensing part. The sensing part is made of material which exhibits a higher limit of proportionality and less creep and hysteresis.

  • Page 42: Connection Of Output To Load

    4.3 Connection of Output to Load Two types of outputs are available. (1) OUTPUT 1 Delivers a voltage of +/-10 V and a current of +/-5 mA (into a load of 2 ｋΩ or more), allowing voltage-input type instruments such as thermal dot recorders and data acquisition devices to be connected to OUTPUT1.

  • Page 43: How To Read Measured Values

    (2) Where a voltage divider is required If the input level of a data recorder is +/-1 V, a voltage divider is required. Pay due care to the impedance. In general, since the output impedance increases as the frequency band becomes higher, it is expressed as: Ｒ...

  • Page 44: Correction Of Calibration (Cal) Values

    (2) Measurement with various types of transducers This calibration voltage value is linked with the bridge supply voltage, and the amount of calibration can always be applied with any panel-indicated value (1 µε to 9,999 µε). Example: If a load cell with a rated capacity and a rated output of 1 kN and １ mV/V is used, to convert the rated output of １...
  • Page 45 AC Voltage True Measurement Calibration １ calibration ＝ × value on １−０．０５８ Bridge box value display Fig.4-8 Voltage measurement on bridge box Such measurement and adjustment are not needed in Models 5683/5684 amplifiers thanks to cable length compensation.(Page 3-7). ４−１１...

  • Page 46: Special Applications

    4.5 Special Applications This section describes how to use the amplifier unit with a slip ring or differential transformer. 4.5.1 Slip Ring (1) When using four slip rings on each lead of the bridge Slip Ring スリップリング Fig4-9 Do not connect terminal Ｅ to any of the A, B, C or D terminals (2) When conducting multi-channel measurement using a common bridge power voltage Slip Ring スリップリング...

  • Page 47: Operation Theory

    ５. OPERATION THEORY 5.1 Flow of Measurement Signal (Refer to Fig.5-1) Signal Ｉｎｐｕｔ Phase  Isolation HEAD RANGE RANGE Selection Detection Circuit FINE Carrier Circuit ＯＵＴＰＵＴ １ Filter Ａ Ｂ Ｅ ＯＵＴＰＵＴ ２ OUTPUT2 Ｃ Ｄ ＬＰＦ Analog to Digital Converter  Bridge Check Ｌｅｖｅｌ  Meter Cable Length Compensation (17 dot LED) Calibration...

  • Page 48: Optional Functions

    ６. OPTIONAL FUNCTION 6.1 Current Output(56-201 4 – 20 mA output unit) Current output can be incorporated into the amplifier unit as an optional function. The current output is made in a manner that allows the voltage output to OUTPUT2 to be converted into the current output.

  • Page 49: Accommodating Amplifier Units

    6.2.1 Accommodating Amplifier Units When accommodating amplifier units into a case, first the slit on the bottom of the unit should be adjusted to the guide of the case. Press the amplifier unit slowly so that the power supply and interface connectors are connected securely. After installing all amplifier units, fix them with two screws at the top and bottom of the front face an amplifier unit 6.2.2 How to Mount Blank Panel Blank panels are used to cover the area of a case where amplifier units are not installed.

  • Page 50: Maintenance

    12VDC (10 to 30VDC) - Check input strain range Input voltage range: 200×10 to 200,000×10 strain (for Model 5683) - Check common-mode voltage Withstand voltage between input and output: 1.5kVAC for one minute. First check the power supply voltage. -Power Supply Voltage Range...
  • Page 51 Symptom 2 No signal is output. Isn’t the measuring range set to OFF? (Doesn’t OFF illuminate on measuring LED (11)?) Yes： Set measuring range to 20k to 200 using measuring range selection knob (8). (See measuring range LED (11).) Input a calibration value using calibration value input switch (14). Is the level of level meter move? Is the output cable of output connector 1 Isn’t output cable disconnected?

  • Page 52: How To Replace Fuse

    7.2 How to Replace Fuse Follow the following fuse replacement procedure. 1.Turn the power switch to off, and then disconnect input and output cables from the amplifier unit. 2.As shown in Fig.7-2, place the amplifier unit so that the front of the unit to be left side, bottom of the unit to be in the front, and the rear of the unit to be right side.

  • Page 53: Changing Ac Power Supply Voltage

    7.3 Changing AC Power Supply Voltage Follow the steps below to switch the AC power supply voltage 1.Turn off and disconnect the power cord and input/output cable from the amplifier unit 2.Remove the cover using two screws (M3) on the top face (Fig.7-6). 3.The AC power supply selection switch is positioned at the location shown in Fig.7-7.

  • Page 54: Specifications

    Nonlinearity Model 5683: ±0.1%/FS, Model 5684: ±0.2%/FS Frequency response Model 5683: DC – 2 kHz ±10%, Model 5684: DC – 10 kHz ±10% High-pass filter 0.5Hz: 2-pole Butterworth type (Filter descent response: – 12 dB/oct) Model 5683: 10, 30, 100, 300, 500 Hz 4-pole Butterworth type...
  • Page 55 (50Hz, X,Y,Z, 10 minutes for each) and conforming to MIL-STD-810F 514.5C-1 vibration Model 5683: 1 kVAC, 1 minute, between each input terminal (A, B, C, D, E), output and housing case 1.5 kVAC, 1 minute, between AC power input and input, output or housing case...

  • Page 56: References

    ９. REFERENCES 9.1.Frequency Characteristics and Phase Properties Frequency Characteristics of Model 5683 Amplitude (dB) W/B(2kHz) 500Hz 300Hz 100Hz 500Hz 10Hz 30Hz 100Hz 300Hz W/B（2ｋHz） 30Hz 10Hz 1000 10000 Phase Properties of Model 5683 Phase Delay (Degree) -100 500Hz -200 300Hz...
  • Page 57 Frequency Characteristics of Model 5684 Amplitude (dB)) W/B(10kHz) 3kHz 500Hz 100Hz 30Hz 10Hz 500Hz W/B(10kHz) 30Hz 3kHz 10Hz 100Hz 1000 10000 100000 Phase Properties of Model 5684 Phase Delay (Degree) -100.0 -200.0 W/B(10kHz) 3kHz -300.0 500Hz 500Hz 30Hz 10Hz 100Hz 100Hz 30Hz -400.0...

  • Page 58: Cable List

    9.2 Cable List Cables Shapes Pin Allocation Remarks Bridge Box Ａ…+BV L en g t h : 3 m TYPE Ｂ…-Input E xt e r n a l d i a m et e r o f 5370(120Ω) Ｃ…-BV c a b l e Φ 9 . 6 5373(350Ω) Ｄ…+Input C o r e w ir e: 0.
  • Page 59 Cables Shapes Pin Allocation Remarks AC Power cord Length: 3.5m (AC 100V) Bare wir e TYPE 0311-5112 DC Power cord Length: 2m RED・・・ＤＣ(＋) TYPE 56-401 Black・・ＤＣ(−) D - su b 9 p i n m a l e – B a r e w ir e Green・・Shied DC Power cord...

  • Page 60: Dimensional Outline Drowing

    9.3 Dimensional Outline Drawing 9.3.1 Unit ９−5...

  • Page 61: Panel Cut Sizes

    9.3.2 Panel Cut Sizes Square Hole ９−6...

  • Page 62: Bench-Top Case

    9.3.3 Bench-top Case TYP E Ａ 4 CH B en ch Top C a s e 56- 104 26 2. 6 2 36 6 C H B e n c h Top C a s e 5 6 - 1 0 6 3 6 2 .

  • Page 63: Rack-Mounting Case

    9.3.4 Rack-mounting Case Rack Rail Elongate Hole ９−8...

  • Page 64: Fan Unit

    9.3.5 Fan Unit 8CH Rack-mounting Case Case Fan Unit ９−9...

  • Page 65: Bridge Box (5370 And 5373)

    9.3.6 Bridge Box (5370 and 5373) ９−10...

  • Page 66: Compact Bridge Box (5379 And 5380)

    9.3.7 Compact Bridge Box （5379 and 5380） ９−11...
  • Page 68 This manual may not be reproduced to any form in whole or in part. ● Then contents in this manual may be updated without prior notice. ● HEAD OFFICE ： 1-17-16,NISHI-HOKIMA,ADATI-KU,TOKYO 121-0812 JAPAN Tel.03(3850)5431/Fax.03(3850)5436 FACTORY ： 5-24-27,HOKIMA,ADATI-KU,TOKYO 121-0064 JAPAN Tel.03(3858)3241/Fax.03(3859)1240 BRANCH OFFICE ：...

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