Smart Instruments

Question 1

What are the 6 key differences between a conventional and a smart transmitter?

Answer 1

Smart transmitters have:
1) ADC
2) DAC
3) Microprocessor
4) Modem
5) Characterization memory
6) Configuration memory

Question 2

What method of isolation isolates signals between ADC and the microprocessor?

Answer 2

Opto-isolators

Question 3

What is stored in the characterization memory?

Answer 3

Data that is specific to the device such as RTD tables for a temperature device

Question 4

What is stored in the configuration memory?

Answer 4

URV, LRV, specific numbers like K-factors

Question 5

What 2 failures can smart transmitters indicate?

Answer 5

1) Input sensor failure
2) Electronics failure within the transmitter

Question 6

When performing a sensor trim what is being adjusted?

Answer 6

Characterization table

Question 7

What connection point for a HART field communicator results in a failed communication

Answer 7

Across the power supply

Question 8

What is a device descriptor?

Answer 8

Instructs a computer on how to communicate with a device

Question 9

What are some advantages of using smart instruments?

Answer 9

1) High accuracy
2) Self diagnosing
3) Can compensate for ambient changes
4) More versatile
5) Remote configuration