2. Principle of Operation
3. Features
The
ESD
92 series is based on the principle of a high input impedance
amplifier feeding a comparator followed by a relay and an analog to
digital convertor. The input signal generated by the transducer is fed to
a sensor compensation circuit, where automatic ambient
compensation in case of thermocouple & lead resistance
compensation in case of Pt-100 is achieved.
Duly compensated signal is fed to a signal conditioning amplifier,
output of which is given to digital display as well as to a comparator.
This comparator compares the process value with the desired value
(Set point). Output of the comparator is given to the relay which
switches ON or OFF depending upon the process value as compared to
the setpoint.
Linearisation of the input signal from the transducer is done by
hardware in the input circuit. This gives a standardized signal to the
analog to digital convertor which drives the LED display, indicating
the temperature directly.
Proven field performance
Highly compact
Dust and vermin proof enclosure with epoxy powder coating
LED display gives better long distance readability
Feather touch Push buttons
Fast response
Available in different DIN standard cutouts
Designed for Thermocouples, RTD, mA, mV input
Fail safe relay logic
Maximum MTBF and minimum MTTR
