Instrumentation Amplifier

  • CE
  • TEDS



· 3 sensitivity registration modes (Actual load calibration, sensitivity-registered calibration, numerical value-registered calibration)
· Selectable 4 high/low limit patterns in memory
· Level test with desired set-value


The WGI-400A is a compact Instrumentation Amplifier which has basic functions required for measurement in combination with strain-gage transducers.

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Instrumentation Amplifier

  • CE
  • TEDS
Models WGI-400A-00E: AC operation with no optional function
WGI-400A-01E: AC operation with BCD output
WGI-400A-02E: AC operation with RS-232C
WGI-400A-03E: AC operation with RS-485
WGI-400A-10E: DC operation with no optional function
WGI-400A-11E: DC operation with BCD output
WGI-400A-12E: DC operation with RS-232C
WGI-400A-13E: DC operation with RS-485


Measuring Section
Channels 1
Applicable Transducers Strain-gage transducers
Compatible Bridge Resistance 87.5 to 1000 Ω (350 Ω, 4 in parallel connection)
Bridge Excitation 2 VDC, 30 mA or 4 VDC, 50 mA, switchable
Measuring Range ±3.2 mV/V (Including zero adjustment range)
Sampling Rate Approx. 50 times/s
Resolution 64000 counts/input range in both polarities
Calibration Modes Actual load calibration, sensitivity-registered calibration, numerical value-registered calibration
Indication Section
Indication Range -9999 to +9999
Nonlinearity Within ±(0.1% FS ±1 digit)
Stability Zero point: Within ±0.5 μVRTI / °C
Sensitivity: Within ±0.01%/°C
Decimal Point Put to anywhere possible
Zero Functions Any value in the input range is set to digital zero; execution by key operation or external contact signal
Minimum Scale Selectable from 1, 2, 5, 10, 20, 50 or 100
Moving Averaging Functions Selectable from 0, 2, 4, 8, 16, 32, 64 or 128
Zero Tracking By setting the time, width and operating range
Zero Approximation A desired value is preset to let the indicator read 0 for any signal in a range of 0 to the preset value.
Adding Functions Indicated value is set to a desired value
(When executing zero compensation).
Original Value Display Functions Enable to display input value in mV/V
Level Test Display of arbitrary values possible
Control Input
Input Signals 4 (ZERO command, level test command and
2 pattern select commands)
Input Mode Open collector (NPN) or non-voltage contact signal
Control Output
Output Signals 3 (HI, OK and LO)
Output Modes Open collector (NPN)
Rated Output 30 VDC, 20 mA (Resistive load)
Comparison/Judgment Based on high/low limits
Judgment Result 1 (OK)
Relative Value Memory Patterns 4 patterns, switchable
Analog Output
Output Signals ±10 V or 4 to 20 mA, switchable
Nonlinearity Within ±0.1% FS
Scaling Set freely
Frequency Response 1 Hz (-3 dB ±1 dB)
TEDS Function Automatic sensitivity registration (Key operation, power ON, RS control)
Compliance Directive 2014/30/EU (EMC)
Directive 2014/35/EU (LVD)
Directive 2011/65/EU, (EU)2015/863 (10 restricted substances) (RoHS)
Power Supply 100 to 240 VAC, or 10 to 30 VDC (To be specified when ordering)
Power Consumption Approx. 6 VA (AC operation)
Approx. 8 W (DC operation)
Operating Temperature -10 to 50°C
Dimensions 96 W x 48 H x 144 D mm (With no option)
Panel-cut Dimensions 92.2 x 45.2 mm
Panel thickness 0.8 to 5.0 mm
Weight Approx. 300 g
Standard Accessories Instruction manual, unit seal
Optional Accessories AC power cables
  P-23 (For 100 VAC)
  P-28 (For 200 VAC)
BCD output cable N-43
BCD output printer cable N-44


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