Answer / carl_ellis

An i/e converter is a current to voltage converter. A
current to voltage converter is a resistor. Electrical
current through a resistance develops a voltage. Ohms Law
determines the voltage drop, E = I/R.

An i/e resistor is typically used in the process world in
4-20mA current loops as the component installed across the
(+) and (-) terminals of an analog input because analog
inputs expect a voltage input. The majority of DCS, PLC,
recorder, controller and indicators use 250 ohms as an input
but other values are used, 1 ohm, 10 ohms, 62.5 ohms, 50
ohms, 100 ohms. Do not assume an analog input is 250 ohms.

Carl Ellis
Measure First

what is difference between RTD , thermo couple and thermistor in general ?? (except temperature co-efficient )

5 Answers   Bilt,

---

why 4 to 20 ma ,why not 0 to 20 or 3 to 15 or anything

19 Answers   Honeywell, TCS, TN,

---

what is a vortex flow meter,mass flow meter and electromagnetic flow meter.particular use of this.means in which condition particular meter is used.

0 Answers   L&T,

---

What is SCR?

9 Answers  

---

what is written on orifice plate?

4 Answers  

---

---

who discoverd ohms law?

3 Answers   HPCL,

---

For crude application in floating roof tank, how to calibrate a DP Transmitter? How is the floating roof weight considered?

0 Answers  

---

how can i check vortex shedder bar it is ok? if there is ohms condition are shown correct?

0 Answers   Chevron Phillips,

---

What is the difference in clamp on type and inline type ultrasonic flow transmitter.

1 Answers  

---

you must show the examples application and give at least 4 types of transducer/sensors that can minimize the failure during the manufacturing of the resistors.

0 Answers   DEWA,

---

How to calibrate Field bus transmitter? procedure ?

0 Answers   Parco,

---

NSV type probe stands for

0 Answers   Qatar Petroleums,

---