High performance signal conditioner for single or multiple strain gauge bridge sensors (SGA A&D)
- Strain gauge amplifier for signal conditioning of load cells
- Bridge excitation of 10V DC with drive for 4 load cells
- Selectable bandwidth of 1 to 5000 Hz for test & measurement applications
- Selectable sensitivity from 0.1 to 30 mV/V using switches and fine trim potentiometer
- Switch selectable offset ±70% FS using switches and fine trim potentiometer
- User selectable analogue output in standard voltage or current format
- The SGA (shown in main photo) comes complete with case, with option of DIN rail mounted case (D4) as shown on left or as pcb board
The SGA Strain Gauge or Load Cell Amplifier is a high performance signal conditioner for single or multiple strain gauge bridge sensors (load, force, pressure, torque), offering a wide bandwidth and a wide input signal range.
The device can be powered from AC or DC supplies providing excitation for up to 4 x 350 ohm strain gauge bridges.
The conditioned ouput signal can be selected from 0-20mA, 4-20mA, 0-10V, 0-5V, ±5V or ±10V.
Options include. Isolated DC supply, DIN rail mount and OEM module.
Waterproof IP65 NEMA4 bulkhead mountable case
Available with AC or DC power supply options
Robust and Fully CE compliant
For a digital version with set point relays, communications and display options please see LCA15
| Parameter | ||||
|---|---|---|---|---|
| Min | Typical | Max | Units | |
| Power supply (SGA/A):- (110/230Vac) 50 - 60Hz | 99/198 | 110/230 | 126/253 | V AC |
| Power supply DC :- | 18 | 24 | V DC (Note: 1) | |
| Power supply IS12/24 - Isolated | 9 | 36 | V DC | |
| Power supply current DC :- (depends on loading) | 50 | 90 | 200 | mA |
| Bridge excitation 350R Strain Gauge | 9.5 | 10 | 10.5 | V |
| Bridge resistance | 85 | Ohms | ||
| Bridge sensitivity (Switchable) | 0.06 | 30 | mV/V | |
| Gain adjustment (Pot - fine adj.) | 0.06 | 1.0 | mV/V (Note: 2) | |
| Offset adjustment (Pot - fine adj.) | -1.25 | +1.25 | %FR (FR=Full Range) | |
| Offset adjustment (Switchable - coarse adj) | ±1.25 | ±79 | %FR | |
| Output load (Voltage output) | 2 | mA | ||
| Output load (Current output) | 0 | 500 | Ohms | |
| Bandwidth (No filter and > 2mV/V) - 3dB point | DC | 6 | kHz | |
| Filter cut-off (Switchable ranges) - 3dB point | 1 | 5000 | Hz | |
| Zero temperature coefficient at 2.5mV/V) | 0.002 | 0.009 | %FR/ ºC at 2.5mV/V FR | |
| Span temperature coefficient | 0.007 | 0.01 | %FR/ ºC | |
| Linearity | 0.03 | %FR | ||
| Gain stability -1st 1000 Hours | 0.2 | %FR | ||
| Gain stability - 2nd 1000 Hours | 0.1 | %FR | ||
| 90 day Offset stability | 3.3 | uV | ||
| Output load stability gain (0 - 100%) | 0.01 | %FR | ||
| Output load stability offset (0 - 100%) | 0.01 | %FR | ||
| Power supply rejection gain (0 - 100%) | 0.01 | %FR | ||
| Power supply rejection offset (0 - 100%) | 0.01 | %FR | ||
| Operating temperature range | -10 | 50 | ºC | |
| Storage temperature range | -20 | 70 | ºC | |
| Humidity | 95 | % | ||
| Note:1 18V max at full load. | Note:2 Depends on sensitivity settings | |||
| Output Options Set by On-Board Switch | ||||
| ±10V, ±5V, 0-10V, 0-5V, 0-20mA, 4-20mA | ||||
| Connections | ||||
| Field screw terminals - 2.5mm² rising clamp | ||||
| Enclosure | ||||
| ABS case 160 x 80 x 55 sealed to IP65 fitted with 3 off cable glands | ||||
| Controls | ||||
| Gain pot, Offset pot, Coarse gain switches, Coarse offset switches, Filter cut-off switches, Output mode switch | ||||
| Environmental | ||||
| CE Environmental Approvals | European EMC Directive 2004/108/EC, Low Voltage directive 2006/95/EC | |||
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Documents
Software
No relevant software available
Product order options
Please read the following before selecting the options for this product:
SGA/A & SGA/D Strain Gauge/Load Cell Amplifier/Signal Conditioner has options for fitting in an IP65 ABS or Stainless Steel Case or to a DIN Rail Fixture
| Options | Code |
|---|---|
| Strain Gauge Amplifier DC Powered | SGA/D |
| Strain Gauge Amplifier AC Powered | SGA/A |
| Isolated DC PSU Module for SGA/D | IS12/24 |
| Accessories | Code |
| DIN Rail Mounting for pcb DSJ1, SGA | D4 |
These are the following industries and applications in which this product has been used:
- Agriculture - Monitoring Loads in Pea Farming
- Alternative Energy - Monitoring Output of Solar Panels
- Silo & Weighing Industry - Remote Silo Weighing
- Marine - Anchor Testing
Rack Mount Load Cell Amplifier and Digitiser
Panel Mount Weighing Indicator and Controller
Wireless Telemetry Acquisition Enclosure
