High Static Differential Pressure Transmitter

High static differential pressure transmitter 3051 HP type high static pressure differential pressure transmitter is my company introduction of foreign advanced technology and equipment in the production of new type high static pressure transducer, the key raw materials, components and parts are imported, the whole machine through strict assembly and testing, the high static pressure transmitter has advanced design principle, variety complete specifications, installation convenient use, etc.

Product Details

Introduction

3051 HP type high static differential pressure transmitter is new type high static pressure transducer from our company. It introductes foreign advanced technology and equipment in the production. The key raw materials, components and parts are imported, the whole machine through strict assembly and testing, and the high static pressure transmitter has advanced design principle, with variety complete specifications, and installation convenient use, etc.


You may be interested in what is pressure transmitter. 


Thanks to the structural advantages of the two most popular and widely used sensors in China (3021 Yokogawa EJA Rosemont, Japan), the intelligent high static pressure differential transmitter is completely integrated on the outside, making the user feel refreshed. At the same time it has the traditional 1151, CECC, etc. It can directly replace the original transmitter, and has the versatility and replacement ability. In order to adapt to the continuous improvement and development of domestic automation level, this series of high static differential pressure transmitter is not only small and exquisite in design, but also has the intelligent function of HART fieldbus protocol. 

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 1、Parameters

Reference accuracyCalibration range of plus or minus 0.1%
Stability:6 months, plus or minus 0.1%URL
Influence of environmental temperature
Zero error:plus or minus 0.2% URL / 56 ℃
Overall error:plus or minus (URL + 0.18% 0.2% calibration) / 56 ℃
Static pressure effect
Zero:At 31027kPa static pressure, it is + / - 2.0%URL.The zero error can be corrected online by zero adjustment.
Range:Correction to + / - 0.25% output reading / 6895kPa
Influence of vibration:In any axial direction, the vibration effect at 200Hz is + 0.05%URL/g
Power supply impact:Less than 0.005% output range/volt.
Load impact:There is no load effect unless the supply voltage changes.
Electromagnetic interference/rf interference (EMI/RFI influence)When the field intensity reaches 30V/M from 20 to 1000MHz, the output drift is less than 0.1% range.
Influence of installation locationThe zero drift is plus or minus 0.25kPa at most.All zero drift can be corrected;It has no effect on the range.
Functional specifications
Measurement range:see the selection table
Zero and rangeCan be used to adjust the range and zero button of the machine, or remote adjustment with HART operator.

Type selection reference:

1. What pressure shall the transmitter measure

First determine the maximum pressure measurement in the system. Generally speaking, it is necessary to select a transmitter with a pressure range about 1.5 times larger than the maximum.This is mainly due to the fact that in many systems, especially in hydraulic pressure measurement and processing, there are peaks and continuous irregular fluctuation up and down, such instantaneous peaks can damage pressure sensors. Continuous high pressure values or slightly exceeding the transmitter's calibration maximum can shorten the life of the sensor and reduce accuracy. A buffer can then be used to reduce the pressure burrs, but this will slow down the sensor's response speed. Therefore, the pressure range, accuracy and stability should be fully considered when selecting the transmitter.

2. What kind of pressure medium

Viscous liquids and slurry will block up the pressure interface, solvents or corrosive substances will not damage the transmitter in direct contact with these media materials. These factors will determine whether to choose a direct isolation film and direct contact with the media materials.

3. How much precision the transmitter needs

The accuracy is determined by non-linearity, hysteresis, non-repeatability, temperature, zero offset scale, and temperature.But mainly by non-linear, hysteresis, non-repeatability, the higher the accuracy, the higher the price.

4. Temperature range of transmitter

Usually, a transmitter will calibrate two temperature determination section, one temperature section is the normal operating temperature, the other is the temperature compensation range, the normal operating temperature range refers to the transmitter in the working state is not damaged when the temperature range, beyond the temperature compensation range may not reach the performance index of its application.

The temperature compensation range is a typical range smaller than the operating temperature range.Working within this range, the transmitter will certainly achieve its due performance indicators.The temperature change influences its output from two aspects, one is zero drift, the other is full range output.Such as: full range of + / - X % / ℃, readings of + / - X % / ℃, in the full scale beyond the temperature range of + / - X %, within the scope of temperature compensation readings of + / - X %, without these parameters, will lead to uncertainty in use.Is the change of transmitter output to degree caused by pressure change or temperature change?The temperature effect is one of the most complex parts of understanding how to use a transmitter.

5. What kind of output signal do you need

MV, V, mA and frequency output digital output, how to choose the output depends on a variety of factors, including the transmitter and the distance between the system controller or display, whether there is "noise" or other electronic interference signals, whether the need for amplifier, amplifier position, etc..MA output transmitter is the most economical and effective solution for many OEM equipment with short distance between transmitter and controller.

If the output signal needs to be amplified, it is best to use a transmitter with built-in amplification.It is better to use mA level output or frequency output for long distance transmission or strong electronic interference signal.

If the RFI or EMI indicator is very high in the environment, in addition to paying attention to select mA or frequency output, special protection or filter should also be considered.

6. What excitation voltage shall I choose

The type of output signal determines what excitation voltage to choose.Many transmitters have built-in voltage regulators, so their power supply voltage range is large.Some transmitter is quantitative configuration, need a stable working voltage, therefore, the working voltage determines whether to use a sensor with regulator, the choice of transmitter to consider the working voltage and system cost.

7. Whether an interchangeable transmitter is required

Determine whether the desired transmitter is suitable for multiple use systems.This is important in general, especially for OEM products.Once the product is delivered to the customer, the cost of calibration by the customer is quite large.If the product has good interchangeability, the effect of the whole system will not be affected even if the transmitter used is changed.

8. The transmitter needs to maintain stability after working overtime

Most transmitters will "drift" after excessive work, so it is necessary to understand the stability of the transmitter before purchase, this kind of work in advance can reduce the future use of all kinds of trouble.

9. Packaging of transmitter

Transmitter packaging, often easy to ignore is its frame, but this point in the future use will gradually expose its shortcomings.When choose and buy transmitter must consider the working environment of transmitter in the future, humidity how, how to install transmitter, can have intense bump or vibration to wait.

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Ordering instructions:

1. The transmitter model can be determined according to the selection specification table as required.

2. The Numbers and symbols in the selection specification form must be clearly and accurately filled in.

3. If there is positive or negative migration, the migration amount must be indicated.

4. If the differential pressure transmitter needs to be equipped with three valve sets and throttling devices, it shall be specified separately.

5. The transmitter shall be calibrated according to the range specified by the user.If the user does not specify, transmitter adjustment to zui large range, this check will be carried out at room temperature, atmospheric pressure.

6. When the station number needs to be marked, it shall be indicated when ordering.

7, when the purchase of remote transmission transmitter, but also according to the different far flange selection table as required.

8. If the remote transmitter is to be used in vacuum and high temperature conditions, it shall be specially marked when ordering. 

9, contact media O - ring sealing materials such as butadiene rubber and fluorine rubber.


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