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传感器信号放大器是将传感器输出信号进行精密放大，线路内部进行稳压、恒流供桥、电压电流转换，阻抗适配，线性补偿，温度补偿等，将力学量转换成标准电流、电压信号输出。
美国Transducer Techniques LCA-RTC集成放大器和信号调理仪功能，用于信号源和读出设备之间的信号调理器件，两级如衰减器、前置放大器、电荷放大器以及对传感器或放大器进行非线性补偿的电平转换器件。
Transducer LCA-RTC成本低，专用于单电桥式称重传感器或者扭矩传感器的信号调节。灵敏度范围：0.5 mV/V to 10 mV/V, 频宽100 Hz to 30kHz，放大输出信号有：0 to ±5V, 0 to ±10V, 0-16 mA, 0-20 mA or 4-20 mA.
The LCA-RTC Module provide low-cost, dedicated signal conditioning for a single bridge type load cell or torque sensor. Model LCA-RTC comes with removable screw-clamp terminal connectors, which accept wires without soldering. On- board jumper selections include sensitivities from 0.5 mV/V to 10 mV/V, bandwidths from 100Hz to 30 kHz, and amplified outputs of 0 to ±5V, 0 to ±10V, 0-16 mA, 0-20 mA or 4-20 mA. Zero and span adjustments are via precision 25-turn low-tempco metal film potentiometers. The units can be operated next to the sensor with 4-wire hookup or at distances up to 1 km (3300 feet) with 6-wire hookup. An onboard 87.325 kΩ resistor allows easy shunt calibration at the push of a button. Provision is also made for a userfurnished calibration resistor. Power requirements are 11.8 to 26V DC with load currents from 10 to 60 mA, the latter applying when the unit provides 10V DC excitation to a 350 ohm load cell and delivers a 20 mA analog output.
Power Requirement 12 to 26V DC
Bridge Excitation 5 to 10V DC
Push Button Shunt Calibration Network
Two-Pole Low Pass Selectable Filter 100 HZ to 30 kHZ
Analog Outputs 0 to ±5V, 0 to ±10V, 0-16 mA,
0-20 mA or 4-20 mA
Voltage Range ±2.5 mV min to 100 mV max
Voltage Sensitivity 0 to 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 4.0 or 10 mV/V
(jumper selectable)
Polarity Reversal Jumper selectable
Offset Voltage ±10 μV typ, ±30 μV max
Offset Voltage Tempco ±0.04 μV/°C typ, ±1.2 μV/°C max
Power Supply Rejection ±0.1 μV/V typ, ±0.3 μV/V max
Offset Voltage Aging ±2 μV/1000h typ, ±6 μV/1000h max
Bias Current ±0.3 nA typ, ±2.8 nA max
Voltage Noise 350 nVpp or 56 nVrms typ (0.1 to 10 Hz)
Voltage Noise Density 12.4 nV/vHz typ at 1kHz
Differential Resistance 1 GΩ min
Common Mode Resistance 100 GΩ typ
Common Mode Voltage -5.5V to +5.5V DC
Amplifier Type Differential, bipolar
Voltage Ranges 0 to ±5V, 0 to ±10V (jumper selectable)
Voltage Load 5 kΩ min
Gain Range 50 to 4000
Noise and Ripple See chart on page 12.
Current Source 0-16 mA, 0-20 mA or 4-20 mA (jumper selectable)
Current Load 0-500Ω (10V compliance)
Nonlinearity ±0.005% of FS max
Zero Adjust ±10% of FS min
Zero Tempco ±0.003%/°C of FS max
Span Adjust ±24% of FS min
Span Tempco ±0.003%/°C of FS max
Filter Configuration Two-pole low pass (jumper selectable)
Filter Frequency Response DC to 0.1, 0.3, 1.0k, 3.0, 10 kHz (-6 dB points)
Voltage Output 5 or 10V DC ±2%
订货型号
Order Code Model Capacity Range Calibration Description
LCA-RTC N/A Load Cell Amplifier Signal Conditioner
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