Answer / jaffer

differential pressure transmitters:

1.both side applied a pneumatic pressure in the h.p&l.p side
check the response on the dp cell.
2.equal pressure on the both side and then transmitters shown
a zero value.
3.upper range value(URL)on the h.p side 10,000mmwc or 1kg/cm2. this value depend on process reqirement.
4.lower range value(LRL)on the l.p side 0 mmwc or 0 kg/cm2.
5.And then change value&change the tag no.
6.check the states of the transmitter. by the help of field calibration devices.

pressure transmitters:
1.the pressure transmitter is only one physical quantity sensing input&applied a input and then same 2,3,4,5,6steps.

i need some objective type questions in instrumentation

0 Answers  

---

what is all types of analyzer in water production plant?

1 Answers   Marafiq,

---

what will be the principle & application of dissoled oxygen analyzer at wast water treatment plant at oxidation basin & how it work?

1 Answers  

---

a pressure transmitter with a range of 0 to 2500kpag has a specified accuracy of 0.5 % of span.It is to be calibrated using a comparison gauge to have an accuracy of 0.1% of span.The comparison gauge has a range of 0 to 3000kpag What is the accuracy ratio? is this ratio acceptable?

1 Answers  

---

components of control circuit belongs to control valve

0 Answers   KOC,

---

---

How to calibrate H2s Dectector

0 Answers   KOC,

---

how to calibrate ph meter?

3 Answers  

---

What is the use of +/- 20ma in analog measurement,and which instrument gives +/-20ma output

1 Answers  

---

Close loop and open loop diagram for instrumentation

1 Answers   Petron ltd,

---

how u meassure room temp?is it possible 2 meassure room temp by rtd or thermocouple?between rtd n thrmocouple which is more regard?3 meassure diff. between rtd n thermocouple?

3 Answers  

---

Reasons for using current as signal

1 Answers  

---

what is the pressure in the tank when its level of liquid is 1.5 meters when its total capacity is 2 meters

2 Answers   Engro,

---