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DESCRIPTION
The Model 414 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 (tare). 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 amplifiers are packaged in rugged, compact steel cases
and will withstand high shock and vibration levels under fully
operational conditions. The steel case is 1.1" by 2" by
3" or 4" depending on options, with stud mounting
bolts. On special order, flange mounting may be substituted.
All adjustment potentiometers are installed on one end, and
a DAM-15 input/output connector is on the opposite end.
Four fixed gain steps are provided which are selected by jumpers
in the input/output connector or by a front panel
switch depending on options. These, combined with the gain vernier, allow
any gain between 20 and 1000 to be set. A full one year
warranty applies when the equipment is used under any environmental
condition 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
- 12 V dc or 28 V dc Powered
- True Differential Input
- High Common Mode Rejection
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