Model self contained, current output, powered signal conditioner bridg

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Model self contained, current output, powered signal conditioner bridg

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Model Bridgesensor
Model self contained, current output, powered signal conditioner bridge type instrumentation. contains precision differential amplifier with filtered output highly regulated, noise, adjustable output bridge excitation source. Model contains isolated DC/DC converter which operates Volts unit completely encapsulated rugged environments.
Complete Strain Gage Bridge Signal Conditioner 4-20 0-20 Output Contains Isolated DC/DC Converter with 0.5mV/V 10mV/V Sensors Drives Four Bridges Volts Rugged Epoxy Encapsulated Design
Applications
Weighing with Load Cells Process Control Add-on Loops Intrinsically Safe Applications Used With Types Output Sensors
Block Diagram
2401 Stanwell Drive Concord, 94520-4841 (510) 687-4411 (510) 687-3333
http://www.calex.com
CALEX FaxFACTS:
1997
Model Bridgesensor
Specifications
NOTE: Specifications apply 55°C Volts input.
Output Current Span Input Span Zero Adjust Minimum Output Temperature Coefficient Hysteresis Amplifier Cell Sensitivity Volts Excitation) Linearity Temperature Stability Hysteresis Input Bias Current Input Noise: Common Mode Input Common Mode Rejection Output Current Loop Resistance Compliance Frequency Response Response Time 0.1% Bridge Excitation Supply Adjustment Range microamp microamp/°C typical microamp/°C maximium microamp maximum
Getting Started with Model
This procedure large tare weights, i.e. greater than about cell's full scale rating. Hook Procedure Connect your load cell INPUT, Connect your load cell INPUT, Note:
mV/V mV/V 0.005% typical ppm/°C 0.1% span maximum maximum microvolts maximum +7.5 Volts minimum
SENSE used your application, connections step need followed. SENSE going used, jumper them described steps
Connect +Excitation, excitation your load cell jumper SENSE, +Excitation, Connect -Excitation, excitation your load cell jumper SENSE, -Excitation, Determine voltage power supply used adjust within volt range necessary before connecting power pins, Verify that hook procedure complete. Turn power supply check bridge excitation supply. Calibration Procedure required load cell excitation voltage using ADJUST. GAIN SWITCH expected load cell output. Short signal input pins together with clip lead. Adjust COARSE FINE OFFSET pots, zero output current. Remove short from step With load cell, readjust zero output. Apply live load cell adjust GAIN, desired output current. COARSE FINE OFFSET pots zero output current. Repeat steps until desired settings obtained.
1000 Volts maximum Hertz, Pole Filter typical
Volts Load Current maximum Stability ppm/°C maximum Hysteresis 0.1% Requirements Input power supply isolated from amplifier reverse polarity protected. Volts 0.17A 0.7A 0.1A 0.35A Volt Volts input Volts above Volts input Volts .0033
Input Voltage Input Current with 150mA load with Bridge Hertz Ripple allowed input supply Isolation
2401 Stanwell Drive Concord, 94520-4841 (510) 687-4411 (510) 687-3333
http://www.calex.com
CALEX FaxFACTS:
1997
Model Bridgesensor
Amplifier
built-in amplifier true differential input, noise, drift, instrumentation amplifier. high common mode rejection ratio (CMRR) provided with output offset that potentiometer adjustable. output offset pots adjust output zero current zero current also adjusted output. instrumentation amplifier gain switch which changes gain factors gain potentiometer fine adjustments. amplifier accepts input signals amplifier withstand input voltages Volts without damage. output amplifier filtered down using double pole Butterworth filter minimize effects high frequency electrical physical noise system.
MODEL POWER INPUT
1000
supply remote sensing provisions wire configurations. sense lines minimize variations output voltage with changes load current lead resistance. should noted that sense feature being used, terminal must connected terminal Terminals must connected also. supply output, connected through safety barrier sense lines will regulate voltage across bridge between Volts. supply short circuit protection protect against short term faults. output recovers automatically from short circuit conditions once short removed.
Application
Figure show typical application using remote sense lines 4-20 output. When using shielded cable between model transducer, connect shield only. connected inside module. switch expected full scale output transducer figure With connected bridge, short input, pins adjust coarse fine offset pots 4.00 output. Then gain full scale calibration. Recheck zero current. zero current changed, reset full scale. fault mode maximum output current will range from approximately with 1000 ohms loop resistance into zero loop resistance.
Only Switch Expected Transducer Full Scale Output
SUPPLY CURRENT
B+LOAD =150mA
B+LOAD =30mA
POWER SUPPLY VOLTAGE
Bridge Excitation Supply
Transducer excitation provided adjustable, well regulated, noise power supply. excitation voltage adjustable means molded-in potentiometer which allows output voltage varied from Volts. capable supplying 150mA drive five load cells Volts.
FIGURE Gain Range Switch
FIGURE Typical Application
2401 Stanwell Drive Concord, 94520-4841 (510) 687-4411 (510) 687-3333
http://www.calex.com
CALEX FaxFACTS:
1997
Model Bridgesensor
Mechanical Specifications
Specifically designed rugged field Model completely encapsulated epoxy using vacuum potting system insure complete seal against corrosive environments. similarly protected against shock vibration will provide years reliable accurate operation.
FIGURE Case Dimensions
Terminal Strip Assignments
Screw Terminal Function Screw Terminal Function
POWER POWER -SENSE B+SENSE
CURRENT OUTPUT AMPLIFIER -INPUT +INPUT
2401 Stanwell Drive Concord, 94520-4841 (510) 687-4411 (510) 687-3333
http://www.calex.com
CALEX FaxFACTS:
1997

Model self contained, current output, powered signal conditioner bridg

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