Answer / deepak munjal

shield is not connected both sides to avoid ground loop
error. Ground Loop error is occur dueto difference in
ground potential at the Shield Connection. It is best to
ground shield at only one end.

Answer / muthu s

shield is generally connected at panel(DCS or PLC panels)
side only to avoid the circulation of current which is
produced by stray pick up.Normally current can flow through
closed loop only, and by keeping transmitter end left
opened, there is no possible of current flowing.

Answer / s. mitra

To drain out the stray current from the loop. If we connect
both end of shield then the induction of circulating
current will create error in main signal.

Answer / bharathi

To avoid stray current in the loop

Answer / giridharan

shielding is first of all resist the melting of temperature ,
the temp to sense has to be inserted in high temp region

How do we MEASURE OR CALCULATE VELOCITY used to calculate REYNOLDS NUMBER??

3 Answers  

---

Why we are using 4-20 mA as Analog signal transmission other than 3 to 19 or 2 to 18 or 6 to 22 like wise ? What is the reason behind using 4 & 20 mA? Can anyone give proper technical reply ?

5 Answers   Air Liquide,

---

what is zero trim and span trim?. at which problem we need to use this?

3 Answers  

---

yogokowa field bus system transmitter all's we are geting IOP fault in Contiunes please help me fine how we can normal the broblems?

4 Answers   ABB,

---

Make a ladder diagram on LSL valve will close, on PSL valve will open and start the motor

0 Answers   CCIE,

---

---

what is difference between accelerometer vibration sensor and proximity vibration sensor

3 Answers  

---

how to calibrate the interface leveltrol

1 Answers   Lanco,

---

capillary type tranmitter using remote seals and capillary tubes filled with liquid of known of known density so if you wanna callibrate it just close block valve just before capilary @ high side & connect druck apply it's calibrated range pressure as normal calibration ensure low side block valve must be closed & if you asking commissioning so this is not a DP type pressure tx so simple if you wanna put in servie this tx just open high side block valve & than low side block same way i do it but still transmitter showing -13 ma.just tell me what i want to do ?

1 Answers   Gasco,

---

What is the purpose of the analyzer in petrochemical plant?

0 Answers   ENI, Lakshmi Machine Works,

---

What is instrumentation amplifier?

3 Answers  

---

How can measure flow in oil line?which type of transmitter is generally used?

1 Answers  

---

Single acting ON-OFF valve. it is air to open. when sov energized , valve will be open, so during that if air fail then what will be the condition of valve ( open or close ) ???

4 Answers  

---