Differential pressure transmitter

5 comments

Rate

julius_8 Member Join Date: Apr 2007 Posts: 9	Differential pressure transmitter 04/16/2010 7:57 PM
	How to get the range min/max of a differential pressure transmitter(PDT) and how to calculate the calibration range LRV/URV? __________________ X-2per
	Register to Reply

Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

These comments received enough positive votes to make them "good answers".

Ace Boeringa Guru Join Date: Mar 2006 Location: Washington USA Posts: 566 Good Answers: 53	#1 Re: Differential pressure transmitter 04/16/2010 10:25 PM
	How you set the range is dependent on the make and model of the transmitter. Calculating the range is deendant on the application. What type of transmitter will you be using and what for?
	Register to Reply

Mikerho Guru Join Date: Jan 2007 Location: Moses Lake, WA, USA, Thulcandra - The Silent Planet (C.S. Lewis) Posts: 4216 Good Answers: 194	#2 Re: Differential pressure transmitter 04/17/2010 12:26 AM
	You do not give enough information, so I can only give an example. The first thing is: "What is the range you need to measure?" Based on this range, you select the DP Transmitter that you will need. For example, your process DP ranges from 0.2 to 0.9 inWC. For this, you would need a DP Transmitter with a span of 0 - 1 inWC. If your transmitter output is a 4-20 mA signal: 4 mA = 0 inWC and 20 mA = 1 inWC. If your transmitter output is a 0-10 VDC signal: 0 VDC = 0 inWC 10 VDC = 1 inWC You would be able to read these values in your PLC typically as counts. If the PLC analog to digital converter resolution is 16 bits, then your span of input (in counts) would be 0 to 32767. With the programming software, you can manipulate this Process Variable signal as you see fit for the optimization of the process. Best Regards, Mike __________________ "Reason is not automatic. Those who deny it cannot be conquered by it. Do not count on them. Leave them alone." - Ayn Rand
	Register to Reply Good Answer (Score 2)

julius_8 Member Join Date: Apr 2007 Posts: 9	#3 In reply to #2 Re: Differential pressure transmitter 04/17/2010 9:49 AM
	Mike, I got more than enough information from you and tnx... ...need another info. as data spec. range min/max is -21 to 21 kgf/cm2 and calibrated range min/max is 0 to 6kgf/cm2.. and it apply to gas/vapour. So what i need to know is how this ranges value calculated to get calibrated range. unlike diff level trans it measure length of tubing to get range and calculated by density to get the calibration range. thanks once again. __________________ X-2per
	Register to Reply Off Topic (Score 5)

Mikerho Guru Join Date: Jan 2007 Location: Moses Lake, WA, USA, Thulcandra - The Silent Planet (C.S. Lewis) Posts: 4216 Good Answers: 194	#4 In reply to #3 Re: Differential pressure transmitter 04/17/2010 7:37 PM
	Hi Julius_8, I am having trouble understanding you. Please allow me to ask some questions of you: What is the range of differential pressure your system is likely to encounter? What is the range of your DP Transmitter? What is the make and model of your transmitter? Where are you sending the signal from the transmitter? If the transmitter signal is being sent to a PLC or other controlling device, what is the make and model of the device? Answering these questions will allow us to "zero in" on a solution. You should uncheck the: Yes, this comment is very likely to be considered to be 'off-topic' box. Since you started this thread, subsequent replies by you to helpful responses would, by nature, be "ON TOPIC". Mike __________________ "Reason is not automatic. Those who deny it cannot be conquered by it. Do not count on them. Leave them alone." - Ayn Rand
	Register to Reply

Anonymous Poster	#5 Re: Differential pressure transmitter 04/23/2010 5:41 PM
	you can use hart communicator and what ever your process values are u can put lrv&urv
	Register to Reply

These comments received enough positive votes to make them "good answers".

Copy to Clipboard

Ace Boeringa (1); Anonymous Poster (1); julius_8 (1); Mikerho (2)

	Got Something to Say?
	Ask a Question Start a Discussion

	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 (50 right now) Show Members