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DESCRIPTION
he auto industry standard for on-board vehicle test, the Model
418 is small and rugged but is able to condition and amplify
the signals from almost any bridge type transducer including
strain gages, load cells, and RTDs. On the test tracks, the
Model 418 can produce high accuracy data despite temperature
extremes and high shock and vibration conditions. RFI/EMI protection
is available to minimize the effects of the many spurious signals
from today's on-board electronics or even telemetry transmitters.
Models with compatible enclosures are available for crash test
and other extreme applications.
The Model 418 is a true differential
amplifier with transformer isolation between input, output
and the power source. An internal
dc / dc converter provides bi-polar voltages for the circuitry
while accepting power from a single external dc power supply
or battery. This is 12 volts for automotive applications
or 28 volts for airborne systems. In addition to the high performance
dc amplifier, the units can be optionally supplied with integral
strain gage excitation supplies and bridge balance or zero
suppression. Transformer coupling contributes to high common
mode rejection and the chopper design results in superior zero
stability. The use of top grade components and a rigorous
testing program ensures reliable operation over a wide range
of ambient temperatures.
The Model 418 amplifier is packaged in a rugged,
compact steel case and will withstand high shock and vibration
levels under fully operational conditions. The Model 418 is intended
for rack mounting and is equipped with a front panel gain switch.
Zero controls are also located on the front panel in accordance
with the options selected. The front panel dimensions are
1.1" by 2.37" and the depth is 4" (plus connector and controls).
The R408 Series enclosures are 3.5" high and optionally
contain 120 V ac power supplies. A full one year warranty
applies when the equipment is used under any environmental
conditions within its rating. |
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FEATURES
- 100 g Shock, 20 g Vibration
- Excellent Stability Under Large, Fast Temperature Changes
- Ohmically Isolated Input and Output
- True Differential Input
- High CMR and 100 V CMV
- Operation From Vehicle Battery Supply
OPTIONS
- Autozero On Command
- Wide Range Zero Suppression
- 100 mA Output
- RFI/EMI Protection
- Isolated Excitation
- Bridge Balance
- 12 V dc or 28 V dc Powered
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