Answer / richard marks

ph meters are calibrated using buffer solutins which are at
known ph levels. Make sure the probe is cleaned before
imerging it in the solutions.

Answer / satish

YOU CAN CALIBRATE IN THREE PHASE 4/7/9 PH BUFFER SOLUTION
NORMALLY WE ARE CALIBRATING WITH 4 & 9 PH BUFFER THAT MEAN
4PH--4MA/9PH--20

Answer / subhash

the Ph calibration is done by using the buffer solutions
,with the one probe i,e the reference electrode and the
measurement electrode ,,,,,,,,,,,,,

1,why we use 4-20 ma output of all instrument qhy not use 0- 20, 2,what is the different between PLC & DCS. 3,how can we meaure maximum span of new flowmeter if not given any information.

4 Answers   Reliance,

---

in sulfur process what is material of impulse line we use to connect with transmitter ? and does teflon affected by sulfur?

0 Answers  

---

Explain signal isolator

0 Answers  

---

what is intools software

2 Answers  

---

Explain operation of Haskel pump.

0 Answers   CCIE,

---

---

why the discharge pressure of ID fan showing negative at fan running condition.(boiler operating condition.)

5 Answers  

---

HOW WE MEASURE A DRUM LEVEL BY DP TRANSMITTER ? WHAT IS ITS FORMULA ?

2 Answers   Thermax,

---

I am applied 100 % pressure on to the air to open control valve,but the valve is not fully closed..and 10-15% is open the valve. how to calibrate the control valve?

3 Answers   OPaL,

---

why we use condesiate parts before tranmitters?

3 Answers  

---

What is deffrence between Battery and capacitor

3 Answers   Siemens,

---

Why we are using reverse action in displacer types level transmitters on some Vessels?

0 Answers  

---

can you suggest good traning institute in instrumentation ? (in automation, or designing)

5 Answers  

---