Bridge Amplifiers for PowerLab
The FE221 Bridge Amplifier is designed to allow the PowerLab to connect to most DC bridge trans-ducers, including commonly available force transducers, temperature probes, light meters, displacement transducers, pressure transducers, and similar devices. They are capable of supporting various powered transducers, and certain low-impedance unpowered transducers.
The FE221 Bridge Amplifier is designed to allow the PowerLab to connect to most DC bridge transducers, including commonly available force transducers, temperature probes, light meters, displacement transducers, pressure transducers, and similar devices. They are capable of supporting various powered transducers, and certain low-impedance unpowered transducers.
Compatibility:
An overload light on the front of each input indicates whether the attached transducer is operating correctly or incorrectly. If the overload light is on the transducer is incompatible with the Bridge Amp and should be disconnected. Contact your nearest ADInstruments rep for assistance.
The Bridge Amps are compatible with PowerLab 35 series.
The following are some of the transducers suitable for use with the Bridge Amps:
MLT0015 High Grade Isotonic Transducer
MLT844 Physiological Pressure Transducer
MLT0380/D Reusable BP Transducer
MLT1020F Plethysmograph Finger Clip
MLT0201 Force Transducer (5mg-25g)
MLT4221/D Skin Temperature Probe
MLT415/D Nasal Temperature Probe
MLT0202 Sensitive ForceTransducer (0-25 g)
MLT1199 Blood Pressure Transducer/cable kit
The Bridge Amps are supplied with the following:
• I²C Cable (9-pin plug to 9-pin receptacle)
• Bridge Amp Owner's Guide
• BNC to BNC Cables
– cable with FE221
– cables with FE224
• DIN Connector Kits
– 1 kit with FE221
– 4 kit with FE224
Applications:
Used for measuring force, displacement and physiological pressures. Ideal for multi-channel isolated tissue studies.
| Specifications | 77-0254 | 77-0256 |
|---|---|---|
| Amplification Accuracy | ±0.5% (combined PowerLab & Bridge Amp) | ±0.5% (combined PowerLab & Bridge Amp) |
| Amplification Range | +/- 200µV to +-5V, full scale (combined PowerLab and Bridge Amp) | +/- 200µV to +/- 5V, full scale (combined PowerLab and Bridge Amp) |
| Analog Input Configuration | Differential | Differential |
| Analog Inputs | 1 (Single) .8-pin DIN | 8 (Octal) .8-pin DIN |
| CMRR Differential | 100 dB at 50 Hz (typical) | 100 dB at 50 Hz (typical) |
| Certifications | CE | CE |
| Control Port | I²C Port Power and control bus for front-end units. Supports a number of front-ends dependent on the PowerLab. Interface communications rate of ~50 Kbits/s. | I²C Port Power and control bus for front-end units. Supports a number of front-ends dependent on the PowerLab. Interface communications rate of ~50 Kbits/s. |
| Dimensions H x W x D Metric | 55 x 120 x260 mm | 70 x 240 x 260 mm |
| Excitation and Zeroing Excitation Voltage Range | 0-20 volts DC (±10 V referred to ground), adjusted by external resistor | 0-20 volts DC (±10 V referred to ground), adjusted by external resistor |
| Excitation and Zeroing Internal Offset Resolution | 16 bit (internal DAC) ± 32 000 steps about 0V 1, 2, 5 V -310 µV/step 100 mV, 200 mV, 500 mV - 31µV/step 200 µV to 50 mV - 3 µV/step | 16 bit (internal DAC) ± 32 000 steps about 0V 1, 2, 5 V -310 µV/step 100 mV, 200 mV, 500 mV - 31µV/step 200 µV to 50 mV - 3 µV/step |
| Excitation and Zeroing Internal Offsetting Range | ±10 V (1 V - 5 V range) ±1 V (100 mV - 500 mV range) ±100 mV (200 µV - 50 mV) | ±10 V (1 V - 5 V range) ±1 V (100 mV - 500 mV range) ±100 mV (200 µV - 50 mV) |
| Excitation and Zeroing Transducer Drive Current | ±45 mA | ±45 mA |
| Excitation and Zeroing Zeroing Circuitry | Software-controlled, either manual or automatic | Software-controlled, either manual or automatic |
| Filtering Low Pass Filter | 1 Hz to 2 kHz in eight steps (software selectable) | 1 Hz to 2 kHz in eight steps (software selectable) |
| Frequency Response | 2 kHz maximum at all gains with the 2 kHz (-3 dB) filter selected. | 2 kHz maximum at all gains with the 2 kHz (-3 dB) filter selected. |
| Input Impedance | 2 x 1 MΩ (Single-ended) 2 MΩ (Differential) | 2 x 1 MΩ (Single-ended) 2 MΩ (Differential) |
| Input Noise | < 1µVrms referred to input at highest gain | < 1µVrms referred to input at highest gain |
| Maximum Input Voltage | ±10 V | ±10 V |
| Maximum Power Needs | 0.8 W | 5.0 W |
| Model | FE221 | FE228 |
| Operating Conditions | 5 to 35 °C, 0 to 90% relative humidity (non-condensing) | 5 to 35 °C, 0 to 90% relative humidity (non-condensing) |
| Package | 1 | 1 |
| Product Family | Data Acquisition | Data Acquisition |
| Weight Metric | 1.2 kg | 2.6 kg |