Answer / ejazmaqsood

because the ma will not drop during any resistance of the wire. voltage can be drop. regarding the 4 ma its live zero mean running condition. we cannot the confirm that our instrument live or not.

How can we calibrate pressure and flow transmitter in the field(online)?

3 Answers   Aramco, Reddy Labs,

---

How d.p. Transmitter can be applied to close tank?

0 Answers  

---

what's the minimum level required of SIL (safety integrity level)to use fire and gas system?

2 Answers   L&T,

---

what do you mean by smart instruments ? define ? give an example?

2 Answers   Flour Tech Engineers (P) Ltd,

---

what is the difference about HART, and 4-20mA signal?

8 Answers  

---

You are looking at the RS-485-side of an RS-232/RS-485 converter and the power supply voltage for the converter is +5V. Under idle conditions (no transmission), and assuming you have enabled the RS-485 output: what would you expect at: (a) Output A measured against output B (b) Output A measured against ground (c) Output B measured against ground

1 Answers   EIT,

---

what is the formula for changing Range of Transmitter from X mmwc to some Y mmwc with respect to DCS NCMH flow range from x NCMH to y NCMH?

1 Answers   HCL,

---

Working principle of vibration sensor?, Type of vibration sensor? , Can we use vertical instead of horizental or vice versa?, if not Reasons?

2 Answers  

---

What is instrumentation control?

0 Answers  

---

Is there’s power on the bus (if so, state whether on the signal bus, or on a separate in the following: a) HART b) Profibus DP c) Profibus PA d) DeviceNet e) Foundation Fieldbus

1 Answers   EIT,

---

how to draw a flowchart for swapping two numbers using bit wise operators?

1 Answers  

---

How to convert milliampares into flow??

0 Answers  

---