Compatibility; Suitable Transducers - ADInstruments Bridge Amp Owner's Manual

Chapter 1 Overview
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
However, because transducers vary in sensitivity and suitability, you
should read the following sections before connecting a transducer to a
Bridge Amp.

Compatibility

Transducers which operate with the ML110, ML112, ML118, ML119
will operate with the ML22x Bridge Amps. The ML110 and ML112
amplifiers had provision for increasing offsetting resolution via an
optional resistor installed in the transducer connector. Transducers
which have this offsetting resistor fitted will operate with the ML22x
Bridge Amps without modification.

Suitable Transducers

The Bridge Amps are designed to connect to transducers that require
DC excitation voltages, such as DC strain-gauge or semiconductor
transducers.
If you are uncertain about the suitability of your transducer, please
provide ADInstruments with an accurate circuit of the transducer and
a sample, and we will see about testing the device for compatibility.
Half-bridge transducers will need to be wired up with compensating
resistors before they can be used with any of the Bridge Amps
(see Chapter 3).
DC Strain-gauge . These are full-bridge or half-bridge transducers
requiring a DC excitation voltage, and output voltages of less than
200 mV full scale. They include strain-gauge force transducers,
temperature transducers and pressure transducers.
Semiconductor . These are powered transducers typically used for
light, displacement, and temperature measurements, giving output
voltages less than 200 mV full scale.
Generally, a Bridge Amp can be used with transducers that:
• require DC excitation voltages, not AC
• have transducer output voltages less than 5 V full scale
have transducer impedances less than 10 k Ω .
•
19