Answer / carl_ellis

1) You can't calculate temperature from millivolts from a
thermocouple without cold junction compensation. The
thermocouple tables only apply when the reading is cold
junction compensated.

2) To determine temperature from a resistance value,
several data are required
- the type of RTD (Pt, nickel, copper)
- the temperature coefficient (the alpha) in Ohms/ohm/DegC
must be given - 0.00385? 0.00392?
- the RTD Standard, IEC, USDoD, DIN 43760 With the base and
the alpha tables are available on the web.
- the Ro, the nominal resistance at 0 deg C

The table you request is specific to the RTD in question.
No data, no table.

Carl Ellis
Measure First

What is PLC(programmable logic control)?

1 Answers  

---

Can I calibrate the Electromagnetic Flow Meter on line and How.

0 Answers   SEWA,

---

The company where I am working, their is rosemount 5400 series radar type level transmitter, it is meant to show level of filled tank, but along with the level it is showing temperature also, so my question is how a onon-contact type radar type level transmitter can show temperature even if it does not have any contact with the fluid?

0 Answers   Process Control Technologies,

---

Why we use 250 ohm resister in series hart communicator?

3 Answers   Thermax,

---

The performance of a pump is monitored by measuring the ________ and _________ pressures

1 Answers  

---

---

what is maximum vaccume?

4 Answers  

---

which transister (npn or pnp) is used in vibration monitoring for negative voltage? 

2 Answers  

---

What is the difference between a PLC (Programmable logic controller) and DCS (distributed control system)?

7 Answers  

---

wht is loops ? how many loops are there?

2 Answers  

---

What is protocol ?

3 Answers  

---

PID controller is used for which type of compensation…… a) lead comp. b) lag com. c) lead lag com.

12 Answers   Engineers India Limited,

---

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,

---