Answer / mohammad asfani

there is one formula with graphitical y=MX+b
for exma:Given a temperature transmitter with a measurement
range of -88 degrees to +145
degrees and a signal range of 4 to 20 milliamps, calculate
the proper signal output at an applied
temperature of +41 degrees.

Ans:take 41 deg and subtract to lrv mens -88. then 129 will
come and then you devide by span rang of transm..likespan
(145--88)=233,129/233=0.55 and take this number and
multiply by spanof current signal like 16ma and addto lrv
after that you can get ans...

Answer / mallu byali

Mohammad Asfani
as our Colleague said that is also right, but one more
simple way is that 1 mv is equal to 25 degree you can
calcutae bases on mv.nothing more
for ex 5 mv at element side then temp is 125 degree.

difference between dcs & pld

2 Answers  

---

i have 80cm water tank.how can i use DPT as level mesurment.pls give specs for that..? We have air comp.from that moisture comeout to one tank.i want to mesure level of water in that tank and then after operat one sov to dicharge water after high level.

1 Answers  

---

WHICH INSTRUMENT USED TO CALIBRATE CONTROL VALVE?

23 Answers   Exxon Mobil, Honeywell,

---

In oil & gas industries and petrochemical industries, there are classification of zones like zone 0, zone 1, zone 2. Is there any differences in voltages or power supply supplied for the process instruments, control instruments depending on the zones

1 Answers  

---

what happen if i increase height of displacer type LT.accuracy or sensitivity are affected.why?

0 Answers   Essar,

---

what is XV and KV valves?

4 Answers  

---

Difference between dcs and plc including date processing and architecture.

0 Answers  

---

1. What means HART communicator / where it is used / how to use it? 2. Types of Thermocouples and its temperature ranges / output of thermocouple? 3. Types of RTDs and its temperature ranges / output of RTD? 4. Idea about Temperature Transmitters? 5. Difference between Analog and Digital signals? 6. Difference between “2 wire” and “4 wire” system / instruments? 7. Difference between “Potential” and “Potential free” contact? 8. Types of flow meters / transmitters? 9. Types of level transmitters? 10. Difference between “Power/Control” cable and “Instrument” cable? 11. What means “shield” and “screen” in cables / how it is useful? 12. Draw a schematic of closed loop circuit of flow / level / pressure / temperature? 13. Idea about calibration of Control valve / positioned / I/P? 14. How to bypass a digital/analog signal in PLC/DCS by hardwire and software?

6 Answers   JSL,

---

What is wet leg condition and why is it used?

0 Answers  

---

Identification of control valve parts.

0 Answers   CCIE, Oil and Gas Jobs,

---

State four different types of flow measurement.

4 Answers   ADMA OPCO,

---

what is rtd

4 Answers   Petrofac,

---