how to calculate the temp. of RTD&Thermocouple when we got
some mV r Ohms?if anybody has d chart pls mail the chatrs
to me...
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Answer Posted / 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
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