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The
Model P511 single-channel amplifier has been the neurophysiologists'
workhorse for extracellular recordings from nerve and muscle for
years. EMG, EEG, ECG and ERG are just a few of the types of signals
that can be recorded using the P511.
The
QP511
shares most of the P511 superior features and is packaged for portable
bench-top use. It has 4 independent channels and is enclosed in
a compact, rugged all-metal cabinet. Optional rackmount hardware
allows mounting in a standard 19" rack using only 5.25" of vertical
space. The QP511 must be operated from the companion ±12 VDC Grass
Power Supply (included).
For low impedance
electrodes, connection may be made directly to the QP511 via the
standard input cable supplied. Optional high impedance
probe provides an excellent interface for high impedance microelectrodes.
|
| SPECIFICATIONS
FOR QP511 |
| Amplification
|
| Amplification |
|
Approximately
1,700 minimum to 50,000 maximum |
| Amplification
Settings |
|
4-position
step switch.
Settings of 5,000, 10,000, 20,000, 50,000 |
| Vernier
Control |
|
Attenuates
amplification settings 3 times |
| 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), switch selectable |
| 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 |
|
4
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 |
|
±
5 mV of zero |
| Terminals |
|
BNC
front panel |
| Calibrator |
| Range |
|
4
values from 10, 100 µV and 1, 10 mV;
±2% accuracy |
| Internal
Calibration |
|
Pushbutton
actuated, DC voltage |
| Regulatory |
| Regulatory |
|
Conforms
to UL-1010, EN-61010-1 |
| Physical
Size |
QP511
|
|
10.0"W
x 5.25"H x 8.5"D
(25.4 cm x 13.3 cm x 21.6 cm) |
| To
Rackmount |
|
Order
kit QPRK1 |
| Weight |
|
4
lbs. (1.8 kg) |
|
Model QP511 bench-top style
|
| FEATURES
AND BENEFITS |
•
Amplification from 5,000 to 50,000 allows processing a wide
range of AC bioelectric signals
• Low Noise improves signal fidelity and resolution
• Built-in 4-position Calibrator simplifies calibration
and verifies performance
• Seven High Pass Pasive Filters and Five 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 Probes provides interface
for microelectrodes
|
|
| OPTIONAL
HIGH IMPEDANCE PROBE |
|
NEW
Model HZP
The HZP High Impedance Probe is intended to provide very high
input impedance when interfacing microelectrodes and other
high impedance devices to Grass amplifiers. It is generally
intended for extracellular microelectrode recording applications,
but can be used for interfacing other high impedance devices.
The unit also incorporates a switching circuit that provides
selection of either recording or stimulating through the same
electrode.
Model
HZP Specifications
|
| POWER
SUPPLY SPECIFICATIONS |
| Input
|
| Input
Voltage |
|
90
to 264 VAC |
| Line
Frequency |
|
47 to 63 Hz |
| Input
Connector |
|
A
series IEC320-C14 |
| Output |
| Output
Wattage |
|
Typical
25 Watts, 35 Watts peak |
| Output
Voltage |
|
±12
VDC |
| Output
Current |
|
±1.1
amperes |
| Noise
and Ripple |
|
±1%
maximum at full load |
| Line/Load
Regulation |
|
±5%
Overall |
| Physical
Size |
| Physical
Size |
|
2"
W x 4" H x 1.5" L
(5.1 cm x 10.2 cm x 3.9 cm) |
| Weight |
|
12
ozs. (0.4 kg) |
|
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