Strain Amplifier / Signal Conditioner PCB (SGA A&D pcb)
- 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/A & D pcb board (as shown in main photo) with mains transformer fitted for AC and DC supplies
- Photo on left shows the cased version of the SGA/A & D
The SGA Strain Gauge Amplifier is a high performance signal conditioner for single or multiple strain gauge bridge sensors such as load, force, pressure and torque. The SGA offers 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 output 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.
The SGA Strain Gauge Amplifier is supplied in a waterproof IP65 NEMA4 bulkhead mountable case and is 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 our Load Cell Amplifier Model 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 | ||||
| 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 | |||
Documents
Software
No relevant software available
Product order options
| Options | Code |
|---|---|
| PCB Strain Gauge Amplifier AC Powered | SGA/A pcb |
| PCB Strain Gauge Amplifier DC Powered | SGA/D pcb |
Digital Weighing Indicator for Panel Mounting
Wireless Telemetry Strain Gauge/Wireless Load Cell Acquisition Module
- Q: Can the SGA be mounted on a DIN Rail?
A: Yes, the SGA can be mounted on a DIN Rail using a D4 base plate listed as an optional accessory for your SGA.
- Q: Does the SGA have shunt calibration?
A: The SGA has an onboard shunt calibration function. This shunts one arm of the connected load cell to produce a known change in the output which can be used for calibration or checking load cell integrity (or associated wiring).
