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The
Model 15A12 DC/AC Strain Gage Amplifier is a dual channel, high
gain, low noise, very stable DC amplifier with versatile input switching
to permit operation as an AC amplifier.
The
15A12 is intended to provide a signal conditioning interface for
transducers and other signals. See Transducers
for details. The LCD displays continuously monitor the output
and simplify setup and calibration. The 15A12 occupies one slot
of the Model 15 bin. Transducer excitation, balancing circuitry,
amplification and filtering are standard features. With appropriate
sensors, the 15A12 can process signals such as pressure, force,
temperature and many others. The AC input switch positions provide
an excellent interface for EEG, EMG, EOG, ECG and other bioelectric
signals.
Some
typical applications for the 15A12 include multiple channel in-vitro
tissue baths, 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 15A94 or the 15A54 High Performance AC
Amplifier with the 15A12 DC/AC Amplifier and PolyVIEW® or Gamma®
Data Acquisition and Analysis software packages.
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| Amplification |
| Amplification |
|
From
50 to 100,000 |
| Amplification
Settings |
|
11-positions
Settings of 50, 100, 200, 500, 1,000, 2,000, 5,000, 10,000 20,000,
50,000 and 100,000. |
| Input
Selections |
| Input
Type |
|
Isolated |
| DC |
|
For
DC bioelectric potential from electrodes and for interfacing transducers |
| AC |
|
For
AC coupling of bioelectric potentials from electrodes and AC coupling
transducers. Time constants of 0.01, 0.1, 1 and 10 seconds, switch
selectable |
|
Input Impedance |
|
1
Megohm, differential |
| Balance
Voltage |
|
±50
mVDC, ±10% accuracy |
| Maximum
Input Signal |
|
50
mV peak to peak |
| Stability |
| Drift |
|
Typically
1 µV/hr after thermal stabilization |
| Filters |
High
(cutoff frequencies,
-6 dB) |
|
0.1,
.0.3, 1, 3, 10, 30, 100, 300 and 1000 Hz |
| Line
Filter |
|
Notch-type
filter (50/60 Hz), switch selectable |
| Output |
| Output
Connector |
|
Analog
output connector on the 15LT bin |
| Maximum
Output |
|
10
volts peak to peak, (±5 volts) |
| Display |
|
3-digit
LCD, minimum resolution: ±10 mV |
| Noise |
|
5 µV peak to peak, refered to input at 30 Hz |
CMR
(Common Mode
Rejection) |
|
10,000:1
(86 dB) at 60 Hz |
| Physical
Size |
| Dimensions |
|
8.625" W x 9" D x 0.875" H
(22 cm x 22.9 cm x 2.3 cm) |
| Weight |
|
1
lb. 2 oz. (0.57 kg) |
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