Answer / carl_ellis

Many manufacturers make all positioners a double acting
positioner and install a plug in the 2nd port and call the
model with the plugged 2nd port a single acting positioner.

No guarantee that all manufacturers do so, but it's true for
some of them.

You have a double action positioner - install a plug in the
2nd output port, plumb it to air and an actuator, give it
try as a single acting positioner and see if it works.

What do you have to lose?

Carl Ellis
Measure First

why 4 to 20 ma used at 0 set

2 Answers   Borouge, Yokogawa,

---

plz you help about Que paper of mahagenco previous your,any model paper relad to it{maharastra power genration}

0 Answers   MahaGenco,

---

Good Evening all.My question is - For a feed water line to an equipment if i need to measure the flow we will use orifice /magnetic/vortex depend on cost/spec.If i need to measure a ''Alarm''signal and ''Interlock'' from one point i think we can use orifice type in one location with 2 different tapping points - one for alarm and one for an interlock to flow valve..If in case i need to have both these signals(Alarm & interlock) from magnetic flow meter,is it possible??will 2 seperate sensors will be located inbuilt r we can program it ??..i thk we can have one transmitter with these 2 signals...need to know any technical issues are there?pls clarify

3 Answers  

---

What is the difference between a PLC (Programmable logic controller) and DCS (distributed control system)?

7 Answers  

---

Introduce yourself which is not present in your biodata?

0 Answers   GAIL,

---

What are three main programming in PLC

5 Answers  

---

Coal mill Instruments Equipments for cement plant And process diagram ?

0 Answers  

---

what is flow equation of kg/hr to m3/hr

2 Answers   Philips,

---

why pneumatic control signal output is use 0.2 to 1 kg/cm2

3 Answers   Jindal,

---

hello i'am samad.Any one Can help me! How to calibrate Vaccum Transmitter DP Type range 0 - 50 mbar abs by hand pump calibrator.

4 Answers   Bharathi Cement,

---

i have done DAE in Instrumentation and Process Control. i have applied for an apprentice training in chemical company after three day my interview will be conduct but i need more information about industrial process control and controller. my e mail is imran_dilsetu@yahoo.com please tell me interview question relative to instrumentation ?

0 Answers  

---

what is your eligibility criteria for freashers?

0 Answers   Satyam,

---