Dual Bio Amp

Overview:

The FE135 Dual Bio Amp consists of two galvanically isolated, high-performance differential amplifiers optimized for the measurement of a wide variety of biological signals, with extended sensitivity. In conjunction with a PowerLab and LabChart, LabChart or Scope software a wide range of appropriate filters are available. The Dual Bio Amp is equipped with an audio output jack for headphones or powered speakers. The Dual Bio Amp is certified and approved for human connection. The unit is supplied with an MLA2540 5 Lead Shielded Bio Amp Cable and MLA2505 Shielded Lead Wires (5 snap-on). 

Accessories suitable for use with the Dual Bio Amp include:
MLA700 Reusable ECG Electrodes
MLA710 Chest ECG Electrode
MLAWBT9 EEG Flat Electrodes
MLA0114/D ECG Lead Switch Box

Hardware:
ADInstruments signal conditioners only function with PowerLab data acquisition units and therefore are not suitable for use with other data acquisition systems.

Features:

• Full electrical isolation from power-line (mains) circuitry to guarantee subject safety
• Low-noise, high-gain differential amplifier specifically designed for biological signal measurements
• Software-controlled low-pass, high-pass and notch filters to remove unwanted signal frequencies for particular uses
• Audio output for use with EMG signals and similar

Applications:

This Bio Amp can be used for recording EEG, ECG, EMG, EOG, ERG, sensory nerve action potentials (SNAP), visual evoked response (VER), cortical evoked potentials, and slow wave (smooth muscle) studies. The Bio Amp is certified and approved for human connection.

Specifications:

Input

• Connection type: Six-pin DIN/MS socket to fit 5-Lead Bio Amp Cable(Tronomed D-1540)
• Input configuration: Two isolated differential channels with commonisolated ground reference
• Input impedance: 200 MΩ differential, 30 pF (no cable) or 200 pF(supplied Bio Amp Cable and Leads) to isolate ground
• Safety: Approved to IEC601-1 CF (cardiac protection)standard
• Isolation: 4000 Vrms (50 Hz for 1 minute)
• Amplification ranges: ±5 μV to ±100 mV full scale in 14 steps (combined PowerLab and Bio Amp)

• Gain accuracy: ±1% all ranges
• Non-linearity: <0.1% within range
• Noise at various bandwidths:

• IMRR (isolation mode): >135 dB (to true earth, 50 to 100 Hz)
• CMRR (common mode): 85 dB (typical) @ 60 Hz
• Input leakage current: <3 μA_rms @ 240V, 50 Hz <2 μA_rms @ 120V, 60 Hz
• DC blocking: ±1 V
• Baseline restoration: Automatic or manual

Filtering

• Low-pass filtering: Fourth-order Bessel filter, ±3% accuracy. Frequencies software-selectable. Standard: 50, 100, 200, 500, 1000, 2000, and 5000 Hz (@ –3 dB); EEG mode: 3, 10, 30, 60 and 120 Hz
• High-pass filtering: First-order filter, ±0.25% accuracy.
• Frequencies software-selectable. Standard: 0.02, 0.1, 0.3, 1, 3, and 10 Hz (@ –3 dB); EEG mode: 0.03, 0.1, 0.3 and 1 seconds
• Notch filter: Second-order filter, –32 dB attenuation; 50 or 60 Hz frequency (automatic sensing)

Output

• Analog signal: ±2.0 V standard
• Audio output: Stereo output supplying signals from both data channels; ±200 mV full scale, current limited to ±5 mA. Suitable for headphones or powered speakers.

Control Port

• I²C port: Provides control and power. Interface communications rate of ~50 Kbits/s.

Physical Configuration

• Dimensions (w × h × d): 200 mm × 65 mm × 250 mm (7.9" × 2.6" × 9.8")
• Weight: 1.47 kg (3 lb 4oz)
• Power requirements: ~3 W
• Operating temperature range: 0 to 35 °C, 0 to 90% humidity (non-condensing)

ADInstruments reserves the right to alter these specifications at any time.