|
NEW
-- Model LP122 AC/DC Strain Gage Amplifier features high
gain, low noise, stabilized DC amplification with versatile input
switching to permit operation as an AC amplifier. This new
amplifier has touch-pad controls.
The LP122 is
intended to provide a signal conditioning interface for data acquisition
systems, oscilloscopes and other devices.
Transducer excitation,
balancing circuitry, amplification and filtering are standard features.
With appropriate sensors, the LP122 can process signals such as
pressure, force, temperature and many others. The AC input positions
provide an excellent interface for EEG, EMG, EOG, ECG and other
bioelectric signals.
Some typical
applications include multiple channel in-vitro tissue bath
studies, cardiovascular measurements, pulmonary mechanics, gut motility
studies and many more.
A complete,
stand-alone data acquisition and analysis system can be created
by combining the LP511 High Performance AC
Amplifier with the LP122 AC/DC Preamplifier and the PolyVIEW®
Data Acquisition and Analysis Software Package.
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 the unit to be mounted 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.
|
| SPECIFICATIONS
|
| Amplification
|
| Amplification |
|
50
minimum to 50,000 maximum |
| Amplification
Settings |
|
10
settings of 50, 100, 200, 500, 1,000, 2,000, 5,000, 10,000, 20,000,
50,000 |
| Input
Selections |
| DC |
|
For
DC bioelectric potentials from electrodes and for interfacing transducers |
| AC |
|
For
AC coupling of bioelectric potentials from electrodes and AC coupling
transducers. Selectable time constants of 0.01, 0.1, 1 and 10 seconds |
| Input
Impedance |
|
1
Mohm, differential |
| Balance
Voltage |
|
±50
mV DC, ±5% accuracy |
| Coarse
Control |
|
x0.1
and x5, selectable |
| Fine
Control |
|
10-turn
potentiometer provides 0.1 and 5 mV/turn |
| Stability |
| Drift |
|
Less
than 1 µV/hour after thermal stabilization |
With
Grass FT03
Force Transducer |
|
5
mg/hr (typical) |
| Filters
|
| High
(cutoff frequencies, -6 dB) |
|
3,000,
300, 100, 30, 10, 1, 0.3, 0.1 Hz |
| Line
Filter |
|
Notch-type
filter (50/60 Hz selectable with internal switch) |
| Time
Constants |
|
0.01,
0.1, 1 and 10 seconds, selectable. Corresponding to frequencies of
10, 1, 0.1 and 0.01 Hz |
| Output |
| Output
Connector |
|
BNC,
front panel |
| Load
Tolerance |
|
5
kohms or greater |
| Maximum
Output |
|
±5.0
volts |
| Output
Level |
|
Adjustable
to zero with the balance control |
| Noise |
|
5 µV peak to peak, referred to
input (100 Hz) |
CMR
(Common
Mode Rejection) |
|
20,000:1
(86 dB) at 100 Hz |
| Physical
Size |
| LP122 |
|
11.25"
W x 1.75" H x 6.2" D
(28.6 cm x 4.5cm x 15.8 cm) |
| Weight |
|
2.5
lbs. (1.2 kg) |
| Regulatory |
| Safety |
|
EN 61010-1:2001,
UL 61010A-1, CSA C22.2 No. 1010.1-92 |
| EMC |
|
FCC Part 15,
Subpart B, Class A, EN 61326:1998 Class A |
|
| 
Model
LP122 Amplifier
|
| FEATURES
& BENEFITS |
| •
|
Amplification
from 50 to 50 k for processing
of a wide range of bioelectric signals |
| •
|
AC
and DC Input extends versatility by providing excitation
for transducers and, with convenient switching to AC, supports
EEG, EMG, ECG and other signals |
| •
|
±50
mV Balance Voltage simplifies transducer balancing and provides
precise measurements of offset potentials |
| •
|
Very
low drift; less than 1 microvolt/hour minimizes time-consuming
rebalancing procedures |
| •
|
Regulated
transducer excitation voltage |
| •
|
Compatible
with all Grass Transducers |
|
•
|
Up
to ±5 volts output |
| ORDERING
INFORMATION |
| Model
LP122 |
|
AC/DC
strain gage amplifier, bench-top cabinet, includes manual (power
supply required) |
| Model
RPS312RX |
|
Medical-grade
power supply for up to 8 channels,
bench-top style |
| Model
RPS312RX-RM |
|
Medical-grade
power supply for up to 8 channels,
rackmount style |
|
Optional Accessories: |
| Model
SRS |
|
Stimulate/Record
Switching Unit |
| Model
TAC-8 |
|
Transducer
cable, 8-foot length (2.4 m) for connection to Grass FT03, FT10,
PT5 |
| Model
TAC-9 |
|
Transducer
cable, 1-foot length (0.3 m) for connection to SCA-1, TPA Adaptors,
and P23XL, P10EZ, PT300 Pressure Transducers |
| Model
CAB-21572 |
|
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
LP1BT-1 |
|
Adjustable
bench-top stand
to mount one amplifier |
| Model
LP1BT-2 |
|
Adjustable
bench-top stand
to stack two amplifiers |
|
Model LP1RK |
|
Rackmount
conversion kit to mount one LP122 amplifier in 19" rack |
| |
|
See
also: rackmount
cabinets and carts |
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