Answer / aftab ahmed mazari

Suppose you using Float/ displacer type of level switch.
Do the followings:
1. Fill the process into chamber of level switching mark.
2. Contacts of level switch should be changed.
3. If already, closed contacts, then should change to open condition.
4. If contacts not changing, do the knob of switch to change.

Suppose you can not fill process into chamber.(Process may harmful, like ammonia etc).
1. Note the process specific gravity. Suppose it is 0.67.
2. Your height for level switching is 1000 mm.
3. Use water to fill into chamber for calibration instead of process.
4. 1000 x 0.67 = 670 mm
5. So fill into chamber up to 670 mm water. It will operate the switch.
aftabmazari@yahoo.com

Answer / mahalingam

The switches all are working in Digital mode.Like 0 or 1. To do the calibration confirm the NO & NC. Basically it is NC when the process reaches the desired level then the circuit will be NO.

What is the input impedence of an OPAMP as an ideal device.

1 Answers   CCIE,

---

define SIMULATION a and what is the need of it

3 Answers   Siemens,

---

Turbidity analyzer working principle ?

0 Answers   Tata Steel Limited,

---

why we use 3 wire rtd direct wiring for temperature measurement instead of temperature transmitter like bearing temperature

0 Answers   ABG Energy,

---

plz you help about Que paper of mahagenco previous your,any model paper relad to it{maharastra power genration}

0 Answers   MahaGenco,

---

In turbine what does term CDP, NI, NH, HSSOC means.

0 Answers   ADMA OPCO,

---

PT RTD Range: -200 to 500 degree celsius If I configured in DCS Lower range and Upper range . In face plate it shows red colour due to overa range how was the characteristics look If the temperature is more than operating range. how was the characteristics look . whether its in Resistance vs Temperature curve is Linear or Non linear

0 Answers   MSL, SRAAC,

---

what is dry leg and what is wet leg?

3 Answers  

---

What is the working principal of Mass flow transmitter?

1 Answers  

---

What is the purpose of MATLAB?

3 Answers  

---

Please tell me details about Sox,Nox,SWAS analyser????

0 Answers   Essar,

---

In close vessel/ drum why we use d.p. transmitter of -ve range i.e. (-)500 to 0 mmwc.

2 Answers   IMECO, Voltech,

---