Excellence in Transducer Design
Load Cells : Force Sensors : Torque Sensors : Pressure Sensors
Load Cells : Force Sensors : Torque Sensors : Pressure Sensors
Transducer amplifier
• Die-cast housing
• High accuracy
• Various outputs
o 4-20mA, 0-10Vdc and +/-10Vdc
Description
The 7539 is a conditioning amplifier PCB assembly for use with strain gauge bridge transducers.
Supplied in a die cast box sealed to IP65 and powered from an external dc supply, it provides stabilised dc excitation to the bridge and generates an output of 3-wire 4-20mA, 0-10Vdc, 0-5Vdc or 2.5-7.5Vdc.
When powered by a bipolar supply, the voltage outputs can also be bipolar.
The amplifier has reversed supply protection, 25 turn Zero and Span controls and screw terminal connections.
Specification
• Power Supply
o 0/12Vdc to 24Vdc for 3 wire current and unipolar voltage outputs
o +/-12Vdc to +/- 15Vdc for 3 wire current and bipolar voltage outputs.
• Bridge Excitation
o 10Vdc stabilised (nom)
• Bridge Resistance
o 87 ohm minimum
• Bridge Sensitivity
o 0.3 to 3.0mV/V
• EMI
o Input RF suppression
• Output 1
o 4 to 20mA (max 30mA)
• Available load voltage
o V supply 9V
• Output 2
o 0 to 5V, 0 to +/-5V, 0 to 10V, 0 to +/- 10V and 2.5 to 7.75V
• Adjustments
o Zero; 25 turn pot
o Span; 25 turn pot
• Connections
o Screw terminals
Accuracy
• Non linearity error 0.01%
• Zero Temp coefficient 0.3 micro-volt/degree C
• Span Temp coefficient 0.01%/degree C
Drawing
Additional Notes
Specification may change without notice
