Answer / nikita

SCADA stands for supervisory control and data acquisition.
It generally refers to industrial control systems: computer
systems that monitor and control industrial, infrastructure,
or facility-based processes
A SCADA System usually consists of the following subsystems:
hmi
plc
rtu
communication interface
HMI is the apparatus which presents process data to a human
operator, and through this, the human operator monitors and
controls the process.
so basically we can say hmi is a part of scada but scada is
not the subsystem of hmi

Answer / ashish gupta

HMI(Human Machine Interface) is a system that shows the
plant parameters to human operator, operator only can see
the parameters and cannot change them.
Where as SCADA is a system which shows the parameters and
also logs the data and alarms and through this data also can
be changed.

why we should maintain neutral earth voltage below 1V while calibration? why cant it be 1.2V or 2V

0 Answers   Hospira,

---

what will happen if transmitter wire get shoted?

2 Answers   Sabic,

---

what is see back effect?

9 Answers  

---

In bimetallic temp. Gauges why does metal strip bend? Why do we use low expansion factor metal and high expansion factor metal in bimetaliv strip?

1 Answers   Process Control Technologies,

---

in sports(eg,cricket) what is the technique for measurement of speed of the ball thrown by the bowler.

6 Answers   BEL, PSU,

---

What is force balance principle? State some of its’ advantages.

0 Answers  

---

explain key exchanges in all security modes WPA,WPA2,TLS?

0 Answers  

---

Definition of level

3 Answers  

---

What is output of Thermocouple at 25 deg c

10 Answers   TATA,

---

we have level transmitter for h2s04 storage tank capacity 10k ,always there are failure of transmitter due to failure of magnetic floats ,please come up with solutions at the earliest.

0 Answers   TechNova,

---

What is the deffernce bet. Instrumentation and Electrical Enginerring?

1 Answers  

---

what is AWG?

2 Answers   NTPC,

---