Interested to Buy Any Domain ? << Click Here >> for more details...
without color coding, without nameplate, without multimeter
how can you find the type of thermocouple???
- 1 Answers
- 6217 Views
- Sabic, I also Faced
- E-Mail Answers
Answer Posted / carl_ellis
Let's assume base metal elements only, since noble metal
elements are so expensive that they are under lock and key;
adequate protection from loss of identification.
For types T, J and K, (and by exclusion, E) the options are
-a spectropscopic assay which will positively reveal the
alloys' composition, but given that the cost of an assay is
proabably 20x times the value of a base metal element, it's
not likely to happen.
- visual identification of a type T by the copper color of
its positive leg which is copper. The alloy leg is a shiny
'metallic' color.
- testing Types J or K with a magnet.
The Type J positive leg is made of iron which has a very
strong magnetic attraction.
The Type K negative leg is made of a nickel alloy which is
mildly magnetic.
Type E is non magnetic, but so are other types.
It can be tricky to distinguish mild attraction on thin
gauge wire.
Testing with a multimeter can be very misleading, because of
the difficulty in determining both the hot junction AND the
cold junction temperatures. Without accurate temperature
values, of what use is a mV reading?
Carl Ellis
Measure First
| Is This Answer Correct ? | 5 Yes | 0 No |
Post New Answer View All Answers
how do u calibrate the vacuum transmitter if it shows more reading
what does the ratio 800-400-300-200/1-1-1-1-1 in the specification of current transformer indicates?
i hav applied for the post of engg. in iocl so please require the past test papers fro instrumentation engg please please help me and send me the papers or tell me the pattern and type of ques asked in examination......
Why use ball valves on Gas pipelines instead of gate & or globe valves...means basic diffrence or use of these valves..how designers knows this type of valve with rating is required...
what are the use of belew gear in general ??
what is the different between deflection type measurement and null type measurement in RTD?
How r the calculation of process line mpm.
what is span value and zero ? and how set ?
can any one tell me when ongc placement test and its forms is available????/ pls tell me if u know
we have a s-5 simense plc having op7 .recently on op7 showing error 1.plc not present 2. DB error frequently. can u have any solution . please send me.
Dear Friends, we are planning to design Power distribution and Fiber optic in the same cabinet.Like Front side Fiber optic and Rear side Power distribution.Is it any possibility of problem occurs like interference etc? Your answer is highly appreciate.
hi friends,im an instrumentation and contol engg student,can u hlp me of suggsting barc written question paper,my id is roysuvaranjan@gmail.com, cel no.9563591747
What is the constant voltage unit?
A valve in series with an orifice plate (DP transmitter), is aligned for constant pressure in the pipeline, if there is an error dx, How to align it in process.
Give 2 application of quartz crystal used for process parameter measurement.
