Answer / 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

why generation of syncronized generator increases when frequency of grid is less then 50Hz & generation decreases when grid frequency goes up from 50 Hz, as comparision with set value entered in govering panel?

1 Answers  

---

what is loop1 and loop2 in MTS LT?

0 Answers   SPGC,

---

What is force balance principle? State some of its’ advantages.

0 Answers  

---

a flow transmitter [range-0-400mbar] connected in process line. please explain me how to calibrate the flow transmitter , & how to do static error

0 Answers   L&T,

---

What is Hysteresis mean in Instrument?

11 Answers  

---

what is difference between Floating D.C.Voltage and Fixed D.C.Voltage?

2 Answers  

---

How to Calibrate Radar Level Transmitter in Field

0 Answers  

---

What is difference between reset and initialization in system.

1 Answers   Marafiq,

---

can i use 1 sq mm insted of 1.5 sqmm cable cable length 600 mts under ground laying Cable carrying 24 vdc 4-20ma current

2 Answers  

---

What is mean by Ethernet, Device net and Control net? For what application we are using these?

4 Answers  

---

What is feedback system.

1 Answers   CCIE,

---

what are the programming languages used in dcs

7 Answers  

---