Answer / carl_ellis

I assume "MURCREY" is mercury, the chemical with the symbol Hg.

On-Off temperature thermostat controllers have used a
mercury filled switch for control output.

Mercury filled thermometers have been around for centuries.

But I am unaware of a temperature transmitter filled with
mercury. 2 wire, loop powered industrial temperature
transmitters with a thermocouple input have been available
for decades.

Configuration of the temperature scale corresponding to the
4-20mA output range and sensor type depends on the make and
model of the temperature transmitter. Different methods are
configuration
- with a HART communicator
- with pushbuttons and a local display
- with a software program and serial communications cable
and modem (RS-232 or USB)
- factory configuration

Calibration generally consists of trimming the 4.0 and
20.0mA levels by the same means as configuration, above.

what is Automation?

3 Answers  

---

why the steam drum and deaerator level transmitter range is in negative MMWC to zero

3 Answers   Emerson, Jindal, JKPM,

---

If Solenoidal valve works in manual mode but not in Auto mode. What should be the problem?

8 Answers   Bharathi Cement, Titanium,

---

What you mean by multi stage control vavles?

0 Answers  

---

What is the difference between rich gas and lean gas?

3 Answers  

---

difference between dcs & pld

2 Answers  

---

How many interlocks at turbine? Plz explain briefly

0 Answers   MRPL Mangalore Refinery and Petrochemicals Limited,

---

what is meant by nuclear power plant?

1 Answers  

---

without a positionar can a control valve operate? give the difference of operating with positionar and without positionar?

5 Answers   IOCL,

---

What is the difference between Analytical instruments and other instruments?

7 Answers   Schenck,

---

how to adjust relay in smart positioner ?

1 Answers   SipChem,

---

what is the meaning of HART ?

2 Answers  

---