Answer / d tilston

Cold junction compensation is required when using a
thermocouple, (TC) to measure temperature.
A TC uses two different types of metal to produce a very
small voltage. This voltage varies as the temperature
changes. The wire used on TC must be the same material as
the TC itself, otherwise you have just created another TC.
The voltage from the second TC will cause errors in the
reading from the first TC. When you get back to the device
that is interpreting this small voltage, you will be
connecting it to the copper on the boards of that device.
As stated earlier, this will create another two TCs, one for
each wire, but if your know the temperature at the device,
you can compensate for these additional voltages. That is
where the cold, (not in the process) junction compensation
is required.

Explain level troll principle & interface level measurement.

1 Answers   ADMA OPCO,

---

If i want use the 6 kg/cm2 pressure gauge then how to calculate its pressure gauge range?

1 Answers  

---

How to measure the vibration..?

1 Answers   Madhucon,

---

I have one DP transmitter of range 0-500mmWC i have to calculate its range in M3/hr for flow measurement so whats the formula.

4 Answers   ABB, TICB,

---

I am teja. I am studying Msc(tech) Electronics and Instrumentation (3years course) in Andhra university. But my course is not recognised by UGC and AICTE. Please tell me the job opportunities after this course. And i fineshed PLC course in IGIAT ,Vizag.Also complted my short term coure in SCADA, Seimans WinCC in ATI,Hyd.After Msc can i join Mtech for good job? or phd. How i can get good job in INdustrial Automation Side. Please give replay.Because this is my life matter.

0 Answers  

---

I am using Capacitive type level transmitter for measuring oil level in a closed tank (lub oil tank). The txs range is 1500mm, and they do hunt regularly (for about 45mm), can anybody tell what could be the reason??? or any other type level tx that could be used to avoid this?

1 Answers  

---

How can we cheak the ENCODER ?

1 Answers  

---

what is the approximate cost of U tube manometer having range 1000mmwc to 1000mmwc?

1 Answers  

---

what is your eligibility criteria for freashers?

0 Answers   Satyam,

---

why cant we use mV instead of mA?

12 Answers   ABB, Power Grid, Qatar Gas, USW, Visa Steel,

---

How to interfacing microcontroller with a DC motor

0 Answers   JJ Tech,

---

What is maintenance planning?

3 Answers   Qatar Airlines,

---