Answer Posted / sandesh mohite

Actually HMI stands for Human machine interface previously
it was called MMI(Man Machine Interface) but MMI turm was
out due to its sexiest tone.
so hmi is Monitoring station from where u can see the
process, control the process by giving cammands via
software cmpitable to it.

Where as SCADA(Supervisory Control And Data Acquisition)
Composed of mainly two parts MTU and RTU. MTU(Master
Terminal Unit)_ to control several RTU's(Remote terminal
Unit) with wire or wireless technology.
SCADA is composed of many HMI's.

send me model hpcl questions pleas..........my mail id mohideen.dharvesh@gmail.com

1862

---

How to interfacing microcontroller with a DC motor

1406

---

Linear amplifier.

1634

---

Calculate the maximum pressure drop that can be allowed to occur across a control valve, so that we can prevent cavitation / flashing from occurring. Use the following formula: Δ P allow = Km (P1 – PvapourA) where, Δ P allow - the maximum allowable differential pressure for sizing purposes, or terminal pressure drop; Km- the valve recovery coefficient from the manufacturer’s catalogue; P1 - absolute inlet fluid pressure; PvapourA - absolute fluid vapour pressure at the inlet temperature; Use Atmospheric pressure = 101.3 kPa, P1 = 1200 kPa(g), PvapourA = 4 kPa, KM = 0.72

1756

---

I need control valve ISA hand book. Is there any site to download that big book containing all the pages. Written by Paul Friedmann

1974

---

---

plz send me general of ongc

1630

---

Yokogawa CENTUMVP R6.09 unable to download to Engineering Station with ExaOPC R3.75 The issue is when I try to download the common project section to the Engineering Station (STN) from the HIS in System View, it is unable to connect. The error displayed is: WARNING: Could not connect to equalize destination. (7001) Retrying. Number of retries = 0/1 ERROR: LdXopsLoadMain: connect error 10060 ERROR: Processing terminated due to connection error. (7002) Equalization end with errors. STN0149 ---- ERROR = 2 WARNING = 1 ---- Background: >Updated the ExaOPC software on the STN from 3.60 to 3.75 >STN operating system is Windows Server 2008 R2 >HIS operating system is Windows Server 2016 Stanard Solutions attempted include: >Ensuring all IP addresses are correct and all networked devices can be pinged. >The ability to ping a device using its host name from another device ( from HIS) >Ensure both devices firewalls are disabled. >The antivirus installed on the STN is disabled. >Ensuring both devices are within the same workgroup. >Added both devices to each other's Host and LMHost files. >Running IT Security tool after changing any administrative settings.

1812

---

what is the electrical operation procedure for switching on 27.6MVA electric furnace.

1694

---

The company where I am working, their is rosemount 5400 series radar type level transmitter, it is meant to show level of filled tank, but along with the level it is showing temperature also, so my question is how a onon-contact type radar type level transmitter can show temperature even if it does not have any contact with the fluid?

1938

---

How to calibrate Magnetic flow Transmitter in Field

886

---

How is automatic reference junction compensation carried out in temperature recorders?

729

---

Meaning of the following a. IOP- Manimum; b. IOP- Maximu,;

1755

---

Q1: Consider part of a control loop, which excludes the transmitter, consisting of a process, a controller and a control valve which may be represented by two dead times of 0.5 min each and three exponential lags of 0.8 min., 1.0 min. and 1.5 min. respectively. We wish to express this system as an overall first order plus dead time (FOPLD) model ie gain, time constant and process dead time. (We will see later that this is often done, to simplify controller tuning). For this exercise, gain is considered to be 1.0. (A) If the transmitter is a flow transmitter whose behaviour can be described by a dead time of 0.2 min. and an exponential lag of 0.5 min. in terms of the overall dead time and overall first order lag how can the system behaviour be approximated ? Overall dead time = Overall time constant = (B) If the transmitter is a temperature transmitter with a temperature sensor in a protecting well whose behaviour can be described by a dead time of 0.7 min. and an exponential lag of 15 min. how can the overall system behaviour be approximated now? Overall dead time = Overall time constant =

1539

---

how to calculate signal cable sizing? and multipair cable sizing??explain in brief?

1993

---

what does the ratio 800-400-300-200/1-1-1-1-1 in the specification of current transformer indicates?

2183

---