High Performance AC Amplifier
for Evoked Potentials, EEG, EMG, ERG - Model LP511

NEW -- Model LP511 is the newest addition to the P511 family. The Model P511 has been the neurophysiologists' workhorse for extracellular recordings from nerve and muscle for years. This new amplifier has touch-pad controls. EMG, EEG, ECG and ERG are just a few of the types of signals that can be recorded using the LP511. This high performance AC amplifier features high gain, adjustable filters, low noise and an output which is easily interfaced with peripheral devices such as computers, oscilloscopes and recorders.The LP511 provides built-in isolation for maximum safety.

The bench-top unit is enclosed in a compact, rugged all-metal cabinet that is easy to stack vertically or horizontally. Optional rackmount hardware allows two units to be mounted side-by-side in a standard 19" rack while using only 1.75" of vertical space. All models require a Grass medical-grade regulated power supply which provides highly regulated ±12 VDC.

For low impedance electrodes, connection may be made directly to the LP511 via the standard input cable supplied. An optional high impedance probe provides an excellent interface for high impedance microelectrodes.

SPECIFICATIONS

Amplification

Amplification   50 minimum to 50,000 maximum
Amplification Settings   4 settings of 5k, 10k, 20k, 50k and 50, 100, 200, 500 (with X.01 setting of rear panel switch)
Filters
Low Filter   2-pole (-12 dB/octave): 0.1, 0.3, 1, 3, 10, 30, and 100 Hz
High Filter   4-pole (-24 dB/octave):0.1, 0.3, 1, 3, and 10 kHz
Line Filter   Notch-type filter (50/60 Hz), selectable with internal switch
Input Characteristics
Input Impedance   20 Mohm, differential, 35 pF at connector per terminal
CMR (Common-Mode Rejection)   Adjustable to 30,000:1 (90 dB) at 60 Hz
Noise   High Gain: 4 µV peak to peak, referred to input, inputs shorted, 3 kHz bandwidth
  Low Gain: < 60 µV peak to peak, referred to input, inputs shorted, 3 kHz bandwidth
Output
Type   Single-ended, clipped at approximately 10 volts peak to peak
Output Impedance   500 ohms
Output DC Level   Adjustable to zero
Terminals   Front panel BNC
Calibrator
Range   10, 100 and 1000 µV; ±2% accuracy
Internal Calibration   Touch-pad actuated, DC voltage
Physical Size
LP511   8.5" W x 1.75" H x 6.2" D
(21.6 cm x 4.5 cm x 15.8 cm)
Weight   2.5 lbs. (1.2 kg)
Regulatory
Safety   IEC 60601-1, 2nd Edition (2000),
UL 60601-1 (2003),
CSA C22.2 No. 601.1-M90
EMC   FCC Part 15, Subpart B, Class A, EN 61326:1998 Class A

Model LP511 Amplifier

FEATURES AND BENEFITS
Amplification from 50 to 50,000 allows processing a wide range of AC bioelectric signals
Low Noise improves signal fidelity and resolution
Built-in 3-position Calibrator simplifies calibration and verifies performance
7 High Pass and 5 Active 4-Pole Low Pass Filters tailor the bandwidth to the signal, improve the signal-to-noise ratio and optimize the A/D process

Optional High Impedance Probe provides interface for microelectrodes

ORDERING INFORMATION

Model LP511

  AC physiological preamplifier, bench-top cabinet, includes CAB-21572 input cable and manual (power supply required)
Model RPS312RX   Medical-grade power supply for up to 12 channels, bench-top style
Model
RPS312RX-RM
  Medical-grade power supply for up to 12 channels, rackmount style
Optional Accessories:
Model SRS   Stimulate/Record Switching Unit
Model HZP   High Impedance Probe, single channel
Model CAB-21572   Spare 3-lead input cable, 8-foot length (2.4 m)
Model CAB-21826   Power supply cable for "daisy-chaining" power to additional amplifiers, 1-foot length (0.3 m)
Model LP5BT-1   Adjustable bench-top stand
to mount one amplifier
Model LP5BT-2   Adjustable bench-top stand
to stack two amplifiers
Model LP5RK-1   Rackmount conversion kit to mount one amplifier in 19" rack
Model LP5RK-2   Rackmount conversion kit to mount two amplifiers side-by-side in 19" rack
    See also: rackmount cabinets and carts