canu tell me why 4-20 ma and why not this 3-25ma?please give reason of this value.

6 Answers  

---

which type of filter gives the constant phase characteristics?

0 Answers  

---

why direct mounted pressure transmitters is always installed with DBB ( double bleed block) valve in process line or top of the tanks ?

0 Answers  

---

what is the meaing of calibration curve?

3 Answers   HCL, Honeywell,

---

If you SOURCE your outputs from a PLC, would you have to make the output HIGH, or LOW, in order to switch an output ON?

1 Answers  

---

what is difference between venturi and orifice

1 Answers  

---

How to check electrical health of Vibration probe?

1 Answers   QAFCO,

---

What is flow ,level, pressure transmitter ?and units?

2 Answers  

---

any body who gone thru recent iocl interview.INSTRUMENTATION questions. I need.

0 Answers   IOCL,

---

Why do we go for 4-20mA? why not other standara?

6 Answers  

---

What is NAMUR standard and why its allways reletad with Sollenoid

2 Answers  

---

As an industrial instrument technician what we have to know?

3 Answers  

---