Strain Gauge Amplifier
Strain Gauge Amplifier 型號：SGA-2- Internal ½- and ¼ Bridge Completion
- Two independent channels per module
- Gain x1, x10, x100
- 4-wire and 6-wire technique
- 1.5 MHz bandwidth at gain x1, x10
- Low offset voltage drift
- Low output noise
- NEW:Auto-Offset ompensation
- NEW:USB or RS485 interface for configuring all settings and read back of the actual output signal.
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The SGA-2 strain gauge bridge amplifier is a differential high speed front-end amplifier with high precision. Strain gauges can be connected to the measuring bridge in full bridges, half bridges or ¼ bridge construction. Among its main features of the amplifier include 4-wire and 6-wire technology, two independent channels per module, low output noise, 1.5 MHz bandwidth with amplification x1 and x10, small voltage offset drift and auto-offset compensation. The USB / RS458 software interface can be used to configure all settings and to monitor the output signal. Visually, it impresses with its robust and modular design. By special arrangement and interconnection of the strain gauges at the measuring bridge, different temperature compensations can be achieved. As a result, thermal expansions cancel each other and certain expansion components can be compensated or selected.
- Internal ½- and ¼ Bridge Completion
- Two independent channels per module
- Gain x1, x10, x100
- 4-wire and 6-wire technique
- 1.5 MHz bandwidth at gain x1, x10
- Low offset voltage drift
- Low output noise
- NEW:Auto-Offset compensation
- NEW:USB or RS485 interface for configuring all settings and read back of the actual output signal.
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SGA-2-P/7 MK2
Module with 2 channels as plug-in to a 19“ Rack chassis
SGA-2-Box/7 MK2
Alu-box ca. 104 x 165 x 35 mm
Configurable Modes
6-Wire, 4-Wire, Internal ½ Bridge, Internal ¾ Bridge
Gain (switch selectable)
x1, x10, x100
Input stage
Differential Amplifier
Bandwidth
1.5 MHz (G=1, 10), 600 kHz (G=100)
Input Impedance
2 x 1 MΩ ca. 25 pF to GND
Input Bias Current
< ±60 nA
Offset Voltage (related to output, *1)
< ± 2.5 mV
Offset Voltage Drift (related to output)
< ± ( 30 + 1 * Gain ) uV/°C
Gain Error
< ± 0.1% (G = 1, 10), < ± 0.5 % (G = 100)
Output Impedance
50 Ω ±0.5%
Max. Output Voltage Swing
±10 V (no Load)
±5 V (Load = 50 Ω)Max. Input Voltage (Protected Input Range)
max. ±42 V (Signal Inputs)
max. ±2 V (Excitation Voltage Pins)Excitation Voltage
10 V or 5 V, ±0.1%
Configurable by Dip-Switches or SoftwareNote: *1) after 1 h Warm-Up Time at Tamb = 25°C