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Simply put, a differential pressure transmitter is a device that measures two opposing pressures in a pipe or vessel.
To understand how a differential pressure transmitter works, we need to know some principles of pressure.
The pressure is the result of force applied onto a unit of area.
In the case of fluid and gas, this area would be the inside of a pipe, tank, vessel or other sealed housing.
Since pressure is a physical quantity, it can be measured.
The pressure is measured in one of the following five units.
– Pascal
– Bar
– Standard atmosphere or atm
– Torr
– Pounds per square inch or psi
The most commonly used measurements of pressure in an industrial fluid and gas processing environment are bar and psi.
One bar is the equivalent of the earth’s atmosphere at mean sea level.
A pound per square inch is the force of one pound on an area of one square inch.
You will most likely use these units of measurement in your work as they are commonly used and almost every manufacturer of pressure measurement devices calibrate them to these units of measurement.
Delta-P or DP is the industry-standard term for the measured differential pressure.
Delta, meaning change in, and P meaning pressure.
In addition, most people will simply call a differential pressure sensor a DP sensor or transmitter.
A DP transmitter is a pressure-measuring gauge or an electrical device that uses two elements to measure the differences of pressure in a sealed container such as a pipe.
DP transmitters will have
– A primary element
– A secondary element
– An electronics housing
The primary element will produce a difference in pressure as the flow in the pipe increases.
Different types of primary elements include
– Orifice plates
– Venturi tubes
– Pitot tubes
– Flow nozzles
– Laminar flow elements
– Wedge elements
The secondary element will measure the difference of pressure produced by the primary element as accurately as possible.
The primary element is sometimes called the high side, and the secondary element is called the low side.
The elements in a DP transmitter will have sealed diaphragms and one of several ways to convert the pressure applied onto the diaphragms into an electrical signal.
Sensors such as differential capacitance, vibrating wire or strain gauges are used to produce the electrical signal that will be sent to the electronics housing, where it is processed, converted and amplified into a current or voltage output that can be read by the control system.
The current output is commonly a 4-20 milliamp signal, or in some cases a 0 to 5 or a 0 to 10 volt signal.
The electrical output generated by the DP transmitter electronic module is linear and proportional to the actual measured Delta-P.
Depending on the range of measured pressure, a 4 milliamp signal would equal a measured Delta-P of 0 psi and a 20 milliamp signal would equal the maximum measurable value. In this case, we’ll say that the maximum Delta-P is 100 psi.
One very common way of measuring flow using a DP transmitter is for the primary element to introduce a constriction in the pipe.
Using a restrictive element on the primary side will create high and low pressure.
When the flow increases, more pressure drop is created.
As we remember, the secondary element will measure the difference in pressure created by the primary element.
These measurements are sent to the electronics housing where the signal processing is done.
By using Bernoulli’s equation, which states that the pressure drop across the constriction is proportional to the square of the flow rate, the Delta-P is then converted into units of flow.
These units of flow can be gallons per minute or cubic meters per hour. Using DP transmitters as a method to measure flow works best on fluids that are relatively clean and of low viscosity.
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Onicon- Air Monitor VELTRON DPT and VELTRON DPT-Plus
ANS là Đại lý Onicon Vietnam,Onicon- Air Monitor VELTRON DPT and VELTRON … The VELTRON DPT-plus transmitter is furnished with an automatic zeroing circuit …
Source: thietbicongnghiep.anhnghison.com
Date Published: 9/13/2022
View: 9097
air monitor corp veltron-dpt-plus – Radwell International
VELTRON-DPT-PLUS Sensors & Switches from AIR MONITOR CORP In Stock, Order Now! Same Day Shipping, 2-Year Warranty, Radwell Repairs – PRESSURE & FLOW …
Source: www.radwell.com
Date Published: 4/16/2022
View: 282
VELTRON DPT2500-plus Transmitter – ONICON
The VELTRON DPT 2500-plus is an ultra-low differential pressure and flow “smart” transmitter. It is designed for demanding HVAC and process applications …
Source: www.onicon.com
Date Published: 1/27/2021
View: 8053
VELTRON DPT-plus – Applied Measurement and Control
The VELTRON DPT-plus transmitter is furnished with an automatic zeroing circuit capable of electronically adjusting the transmitter zero at predetermined …
Source: www.appliedmc.com
Date Published: 2/20/2022
View: 2386
VELTRON DPT-plus – Air Monitor Manuals – ManualsLib
View and Download Air Monitor VELTRON DPT-plus installation, operation and maintenance manual online. Microprocessor Based Ultra-Low Range Pressure & Flow …
Source: www.manualslib.com
Date Published: 6/4/2022
View: 7542
주제와 관련된 이미지 veltron dpt plus
주제와 관련된 더 많은 사진을 참조하십시오 차압 트랜스미터 설명. 댓글에서 더 많은 관련 이미지를 보거나 필요한 경우 더 많은 관련 기사를 볼 수 있습니다.
주제에 대한 기사 평가 veltron dpt plus
- Author: RealPars
- Views: 조회수 254,895회
- Likes: 좋아요 7,465개
- Date Published: 2019. 12. 30.
- Video Url link: https://www.youtube.com/watch?v=XkMEto_x22A
Onicon- Air Monitor VELTRON DPT and VELTRON DPT-Plus Onicon Vietnam
The VELTRON DPT-plus transmitter is furnished with an automatic zeroing circuit capable of electronically adjusting the transmitter zero at predetermined time intervals while simultaneously holding the transmitter output signal. The automatic zeroing circuit eliminates all output signal drift due to thermal, electronic or mechanical effects, as well as the need for initial or periodic transmitter zeroing. For transmitters operating in a moderately steady temperature location (thus no thermally induced span drift), this automatic zeroing function essentially produces a “self-calibrating” transmitter. the automatic zeroing circuit will re-zero the transmitter to within 0.1% of its operating span; for a transmitter with a 0.02 IN w.c. operating span, this represents a zeroing capability within 0.00002 IN w.c. To permit manual calibration of the VELTRON DPT-plus, an electronic switch is provided to permit manual positioning of the zeroing valve.
VELTRON-DPT-PLUS by AIR MONITOR CORP
Layout, design, and compilations on this site, are Copyright © 2022 Radwell International, LLC. All rights are reserved. PLCCenter is a Division of Radwell International, LLC. Radwell International, LLC. sells new and surplus products and develops channels to purchase such product. This website is not sanctioned or approved by any manufacturer or tradename listed. Radwell / Radwell.com is not an authorized distributor, affiliate, or representative for the listed manufacturers unless explicitly stated otherwise. Designated trademarks, brand names and brands appearing herein are the property of their respective owners.
Rockwell Disclaimer: The product is used surplus. Radwell is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because Radwell is not an authorized distributor of this product, the Original Manufacturer’s warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, Radwell makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. Radwell also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. Radwell also makes no representations as to your right to install any such firmware on the product. Radwell will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.
VELTRON DPT2500-plus Transmitter
The VELTRON DPT 2500-plus is an ultra-low differential pressure and flow “smart” transmitter. It is designed for demanding HVAC and process applications where high accuracy and microprocessor based functionality are needed. Accurate to ± 0.25% of natural span with a range of 25.0 to 0.05 IN W.C.
AIR MONITOR VELTRON DPT-PLUS INSTALLATION, OPERATION AND MAINTENANCE MANUAL Pdf Download
Installation, Operation,
and Maintenance Manual
VELTRON DPT-plus
Microprocessor Based Ultra-Low Range
Pressure & Flow “Smart” Transmitter
Version 1.4X
Installation, Operation & Maintenance
Air Monitor Corporation provides complete
technical support between the hours of
7 a.m. and 5 p.m. PST, M-F
Contact our Service Department
Toll Free: 1-800-AIRFLOW
or fax us at 1-707-526-2825
VELTRON DPT-plus
Air Monitor Corporation
– IO&M Manual
116-010-91.P65 (09/18/09)
키워드에 대한 정보 veltron dpt plus
다음은 Bing에서 veltron dpt plus 주제에 대한 검색 결과입니다. 필요한 경우 더 읽을 수 있습니다.
이 기사는 인터넷의 다양한 출처에서 편집되었습니다. 이 기사가 유용했기를 바랍니다. 이 기사가 유용하다고 생각되면 공유하십시오. 매우 감사합니다!
사람들이 주제에 대해 자주 검색하는 키워드 차압 트랜스미터 설명
- Differential Pressure Transmitter
- principles of pressure
- pounds per square inch
- psi
- Delta-P
- DP
- differential pressure sensor
- DP sensor
- DP transmitter
- pressure-measuring gauge
- DP transmitter elements
- primary element
- secondary element
- electronics housing
- orifice plates
- venturi tubes
- pitot tubes
- flow nozzles
- laminar flow elements
- wedge elements
- diaphragm
- electrical signal
- Sensors
- differential capacitance
- vibrating wire
- strain gauges
- Bernoulli’s equation
차압 #트랜스미터 #설명
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