Strain Measurement Instruments
Basic instrumentation requirements call for stability, accuracy and high resolution when making measurements under static loading conditions, and particularly where measurements are to be taken over long periods of time. Micro-Measurements offer our P3 Strain Indicator and D4 Data Acquisition Conditioner to meet these demanding criteria. In addition, our MultiDAQ is a single-channel USB device suitable for fast and simple test setups.
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| MultiDAQ | D4 | P3 | |||||
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Measurement Range |
±16,000 µƐ @ GF=2.00 | ±31,000 µƐ @ GF=2.00 | ±31,000 µƐ @ GF=2.00 | ||||
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Connection |
RJ45 | RJ45 | Terminal Block or TIO | ||||
| Input Type | Strain Gage | Strain Gage | Strain Gage | ||||
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Bridge Types |
¼ , ½ , Full Bridge | ¼ , ½ , Full Bridge | ¼ , ½ , Full Bridge | ||||
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Bridge Completion |
120Ω, 350Ω, 1000Ω, internal HB 1KΩ | 120Ω, 350Ω, 1000Ω, internal HB 1KΩ | 120Ω, 350Ω, 1000Ω, internal HB 1KΩ | ||||
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A/D Converter |
24 bit Delta-Sigma | 24 bit Delta-Sigma | 24 bit Delta-Sigma | ||||
| Max. Input | ±8 mV/V @ GF = 2.0 |
±15.5 mV/V @ GF = 2.0 |
+/-15.5mV/V @ GF = 2.0 |
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Resolution |
1µƐ @ GF=2.00 | 1µƐ @ GF=2.00 | 1µƐ @ GF=2.00 | ||||
| Accuracy | 1% of reading @GF=2.0 | 0.1% of reading ±3 counts |
0.1% of reading ±3 counts |
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Excitation |
2.5 Volts (nominal,fixed) | 1.5 Volts (nominal,fixed) | 1.5 Volts (nominal,fixed) | ||||
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Power source |
USB only | USB only | USB, battery, or DC Input | ||||
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Data Rate (Samples per second) |
80 S/s | 8 S/s | 1 S/s | ||||
| Max. Storage | PC dependent | PC dependent | 32GB SD card or PC | ||||
| Max. Channels (multiple units) | 12 | 24 | 24 | ||||
| Software | Windows based | Windows based | Windows based | ||||
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Drivers |
Labview, .NET interface | Labview, .NET interface | Labview, .NET interface |
The P3 Strain Indicator and Recorder
The P3 Strain Indicator and Recorder is a portable, battery-operated instrument. It can accept up four inputs from quarter, half, and full bridge strain gage circuits, including strain-gage-based transducers. Front-panel lever operation terminal blocks enable fast connection and reconfiguration, and the TIO option adds high-quality Transducer Input connectors. A highly stable measurement circuit, regulated bridge excitation supply, and precisely settable gage factor enable measurements of ±0.1% accuracy and 1 microstrain resolution. The P3 can be operated stand-alone via the membrane switch front panel or from the supplied software though USB to a PC.
The Model D4 Data Acquisition Conditioner
The Model D4 Data Acquisition Conditioner is a USB-powered instrument that connects to a personal computer. It can accept up four inputs from quarter, half, and full bridge strain gage circuits via RJ45 connectors. A highly stable measurement circuit, regulated bridge excitation supply, and precisely settable gage factor enable measurements of ±0.1% accuracy and 1 microstrain resolution. Operation is via the supplied software and can operate up to six D4s concurrently for up to 24 channels.
The MultiDAQ or StudentDAQ
The MultiDAQ is a unique and simple single-channel device. Whilst it does not have the advanced features of its multi-channel siblings, it enables quick measurements with a minimum of setup. Strain gage inputs (quarter, half and full bridge) can be connected via the RJ45 connector and set up with the supplied software. Measurements units can be microstrain or user-defined for load or displacement measurements, and up to twelve devices can be operated at the same time. The internal quarter bridge resistance is fixed; three versions are available for 120, 350 or 1000 Ω inputs.
Learn more about the MultiDAQ / StudentDAQ
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