How to isolate a DPT from line in the condition that process must not be disturbed,and process is also critical and no bypass is available.?

4 Answers   Descon,

---

We do have a problem in the company that is one PT connected to PlC which is mean 1 out of 1 in PLC system we do have the PAHH is 55 mbar and PALL 8 mbar with a timer of 15 sec for the PAHH the problem started when PAHH goes more than the set point which is 55 it reached up to 71 but due to timer doesn't trip . We force it and we checked everything nothing there . We replaced the transmitter problem still there the reading goes more than the 55 bar the range for transmitte is 0- 60 mbar . So we did loop check , aculaizing valve , wiring all are okay . What the possible causes for this ???

2 Answers   National Petrochemical Company,

---

Transmitter reading is zero but in DCS showing one Bar what is the reason ?

3 Answers  

---

IF PLC POWER FAILURE THEN WHAT HAPPEN?

2 Answers   IFFCO,

---

if I did short to both AO connections, channel will burn or what? m sure in AI it will damage to channel. But what will happens in AO?

1 Answers  

---

What is Actuator?

3 Answers   Descon,

---

The wire is disconnected from the fuel gauge sending unit (bimetallic gauge). A voltmeter connected to the wire reads a pulsating 5v. What does this indicate?

3 Answers  

---

Can I put my meter across an RTD to check it safely witout tripping the equipment when it is connected to an monitoring device eg.RTD module or IQ 1000

1 Answers  

---

Why 4mA-20mA current loop selected as standard ???

1 Answers   IMCO, Reliance,

---

Hi i m B.E. In elect. & comm. I m workin in bio mass plant from 6 mnths as inst. Engg. but now i m in dept. Of operation as shift engg...which is best operation or inst. 4 me? M confusd..plz help and reply me..

2 Answers  

---

Rtd sensor how to calibrate

5 Answers   Sepam Group,

---

What is intrinsic safety mean.

0 Answers   CCIE,

---