Answer / ayaz

MR Carl Ellis 
   Solenoid in workshop not in service and no specification on the solenoid how to know we usage solenoid
for example field supply for solenoid is 24 v dc and no new in warehouse and how to check and  use older solenoid without specification 

Answer / carl_ellis

1) Put a voltmeter on the solenoid terminals and see what the control signal supply voltage is. It could be AC or DC.

2) Go back to the control signal source and trace the wires until it becomes apparent what the control signal voltage is.

3) Dig out the electrical drawings and see what control signal the circuit was designed for.

4) Measuring winding resistance is dicey (not terribly reliable) because the wattage ratings on solenoid coils covers a range of about 3:1, so the difference between a DC coil and an AC coil, or between a 6 or 9 watt coil is overlapped by different wattage coils for different services.

Carl Ellis
Measure First

how does we do bench calibration of a differential transmitter.

1 Answers  

---

What is Span Error

0 Answers  

---

How signals can be taken through modbus?

1 Answers  

---

How works weighfeeders in cement industry? what is the working principle?

0 Answers  

---

What is the difference between pt100, pt500 and pt1000 RTDs?

3 Answers   ICI Pakistan,

---

wHAT IS BURST MODE IN TRANSMITTER?

1 Answers   Bhel,

---

what is the electrical operation procedure for switching on 27.6MVA electric furnace.

0 Answers   Jindal,

---

why used three wire in RTD.

8 Answers   BARC,

---

Explain Split Range Control In Control Valve Briefly.

5 Answers  

---

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  

---

why k factor is important to know in flow transmitter. if we don,t know k factor what will be issue we can face .

1 Answers   Flour Tech Engineers (P) Ltd,

---

what is the difference between auto tuning and manual tuning of controllers(eg:PID,PI,PD CONTROLLERS )

2 Answers   GATE,

---