Previous in Forum: Density Gauge Calibration   Next in Forum: Level Calculation
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
9 comments
Rate Comments: Nested
Anonymous Poster

Instrumentation MOV

12/10/2010 2:40 AM

HOw MOV works with 4 to 20 mA?
Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#1

Re: Instrumentation MOV

12/10/2010 3:32 AM

MOV = motor-operated valve?

__________________
 "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Reply
Doorman
Guru
Hobbies - DIY Welding - Don't Know What Made The Old Title Attractive... Popular Science - Weaponology - New Member United States - US - Statue of Liberty - 60 Year Member

Join Date: Apr 2009
Location: Yellowstone Valley, in Big Sky Country
Posts: 7425
Good Answers: 295
#2

Re: Instrumentation MOV

12/10/2010 1:32 PM

MOV = Metal Oxide Varistor?

And, what happens when a 24V filament lamp is connected, rather than a high-impedance DVM? Oh, never mind... wrong thread

__________________
 Semper Ubi Sub Ubi
Reply
PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#4
In reply to #2

Re: Instrumentation MOV

12/11/2010 2:43 AM
__________________
 "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Reply
Anonymous Poster
#3

Re: Instrumentation MOV

12/10/2010 8:46 PM

As what i have noticed in our plant, MOV usually does not operated with analog signal...some MOV's will stop at certain percentage of opening/closing feedback (inching type or intermediate type). there are limit switch to sense for full close/open position...and it will give signal to the controller in a form of digital signal (DI). when the operator wants to open the MOV he will then sends digital signal via DO card. In short, MOV is for On/Off control.. 4~20mA is an analog signal which usually used in modulation control.. Just an idea..thanks
Reply
msamad
Guru

Join Date: Feb 2009
Location: Houston, USA
Posts: 946
Good Answers: 244
#5

Re: Instrumentation MOV

12/12/2010 6:34 PM

With your question, it appears that you would like to use MOV (Motor Operated Valve) as a control valve. MOV is not used as control valve. It is used to open/close the valve using the motor power, in addition to do it manually. MOV is generally used with reversible motor starter so that the motor can operate in both direction (close in one direction and open in other direction).

- MS

__________________
 "All my technical advices in this forum must be consulted with and approved by a local registered professional engineer before implementation" - Mohammed Samad (Linkedin Profile: http://www.linkedin.com/in/msamad)
Reply
RDGRNR
Guru
Engineering Fields - Instrumentation Engineering - New Member

Join Date: Dec 2009
Location: San Antonio, TX USA
Posts: 844
Good Answers: 29
#6

Re: Instrumentation MOV

12/13/2010 12:49 PM

As the OP wasn't specific at all we may never know to what he was referring to but it could have been an old Allen Bradley instruction. Here it is.

__________________
 "Do not worry about your difficulties in Mathematics. I can assure you mine are still greater". - Albert Einstein
Reply
BIN95
Power-User
Engineering Fields - Control Engineering - Control Engineering Technical Fields - Education - Industrial Training Engineering Fields - Manufacturing Engineering - Manufacturing Training Engineering Fields - Electrical Engineering - Electrical engineering Training Engineering Fields - Instrumentation Engineering - Instrumentation Engineering United States - Member - New Member Engineering Fields - Energy Engineering - Become part of the larger group, change your world.

Join Date: Apr 2005
Location: Las Vegas, NV
Posts: 266
Good Answers: 1
#7
In reply to #6

Re: Instrumentation MOV

12/20/2010 9:22 PM

Good one RDGRNR, that is what I was thinking too. MOV- Move instruction in PLC. You commonly use somewhere when dealing with 20/40 signal.

__________________
 AB PLC Training onsite, On-Line, training software and more. BIN95.com
Reply
Anonymous Poster
#8

Re: Instrumentation MOV

12/20/2010 9:30 PM

MOV- Motor Operated Valve
Reply
BIN95
Power-User
Engineering Fields - Control Engineering - Control Engineering Technical Fields - Education - Industrial Training Engineering Fields - Manufacturing Engineering - Manufacturing Training Engineering Fields - Electrical Engineering - Electrical engineering Training Engineering Fields - Instrumentation Engineering - Instrumentation Engineering United States - Member - New Member Engineering Fields - Energy Engineering - Become part of the larger group, change your world.

Join Date: Apr 2005
Location: Las Vegas, NV
Posts: 266
Good Answers: 1
#9
In reply to #8

Re: Instrumentation MOV

12/21/2010 7:57 AM

Here is the manual.

http://www.sierrainstruments.com/techsupport/manuals/im_830_840_860.pdf

See page 2-12 and 3-3

__________________
 AB PLC Training onsite, On-Line, training software and more. BIN95.com
Reply
Reply to Forum Thread
Have a Different Question?
9 comments
Copy to Clipboard

Users who posted comments:

Anonymous Poster (2); BIN95 (2); Doorman (1); msamad (1); PWSlack (2); RDGRNR (1)

Previous in Forum: Density Gauge Calibration   Next in Forum: Level Calculation

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Instrumentation:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (67 right now)
Show Members
Advertisement