The 1151 transmitter is used to accurately measure micro differential pressure to large differential pressure, low pressure to high pressure, liquid level, vacuum degree, and specific gravity. Combined with the throttling device, flow can also be measured without the need for an external square root opener. Its characteristics are as follows:

·High precision, diverse varieties, wide measurement range, and good stability (see variety specification table)

·Adopting a two-line working mode

·Using solid circuit components, the printed circuit board has a plug-in method

·Small, sturdy, and highly resistant to vibration

·The range and zero position can be continuously adjusted externally

·Positive migration can reach 500%, negative migration can reach 600%

·Adjustable damping

·Rich selection of projects

□ Structural principle

The pressure of the measured medium is transmitted to the central measuring diaphragm through the isolation diaphragm of the δ chamber (LT and DP/GP remote transmitters with 1199 are used to transmit the measured pressure first through an isolation diaphragm and a fully sealed capillary system filled with silicone oil or fluorine oil before being transmitted to the isolation diaphragm of the δ chamber) and the filling oil in it. Except for the AP type * * * * pressure transmitter, which measures the vacuum reference point on the other side of the diaphragm, other types of measuring diaphragms have either atmospheric pressure or low-pressure measurement of the measured differential pressure on the other side. The measuring diaphragm is a pre tensioned elastic element, and its displacement is proportional to the pressure of the measured medium. The displacement of * * * * is only 0.10mm, and the position of the measuring diaphragm is detected by the capacitor fixed plates on both sides. The differential capacitance of the fixed plates of the two capacitors measuring the membrane is linearly converted into 4-20mA by the amplification circuit

DC two-wire current signal.

□ Main technical indicators

Target audience: liquids, gases, or vapors

Measurement range: DC 4-20mA

L-type low power consumption (hereinafter referred to as L-type) is DC 0.8-3.2V

M-type low-power (hereinafter referred to as M-type) is DC 1-5V

Power supply: The typical power supply voltage is DC 24V. When the transmitter is not loaded, the working power supply can be DC12-45V

The working voltage range of L-type is DC 5-12V

The working voltage range of M-type is DC 8-12V.

Load range: The load impedance of L and M types is 10K Ω

Indicator header: The size of the on-site indicator gauge is 50.8mm, with an indication accuracy of ± 2%.

Power consumption: Only for L and M types, under normal working conditions, the L type is 1.5mA and the M type is 2.0mA

Explosion proof: Certified and approved by the Federation of American Manufacturers (FM) for:

Level I: Zones 1 and 2, Groups B, C, and D.

Level II: Zones 1 and 2, Groups E, F, and G

Level III: Zones 1 and 2 (Universal Type)

□ CSA accreditation is used for: Level I: Zone 2, Groups A, B, C, and D.

Level I: Zone 1, C. Group D.

Level II: Zones 1 and 2, Groups E, F, and G

Level III: Hazardous Area

□ Intrinsic safety identification and recognition: When connected to a recognized safety barrier system, provide the FM or CSA certificate (optional) for the selected level, zone, and group, and the standard FM explosion-proof marking. The corresponding marking can be exchanged according to the selected certificate.

·The People's Republic of China "****** Explosion proof Safety Supervision and Inspection Station for Instruments and Meters" (NEPSI) - Shanghai Institute of Industrial Automation Instruments

Identification and recognition meet the following criteria:

Explosion proof type: Ex d II CT6 Certificate number: GYB91191 GYB91192 (with indicator)

Intrinsic safety type: Ex ia II CT6 Certificate number: GYB91193 GYB91194 (with indicator)

Range and parts: externally continuously adjustable

Positive and negative migration: * * * * positive migration is 500%, * * * * negative migration is 600%, DP √ Δ P type zero position

The positive and negative transfer amounts are ± 10% of the flow range.

The AP type only has a positive migration rate of * * * * and is 500%.

Temperature range: amplifier operating temperature -29~93 ℃, DP √ Δ P amplifier operating temperature -29~66 ℃

Working temperature of silicone oil filled measuring element:- 40～104℃

Working temperature of inert oil measuring element:- 18～71℃

Storage temperature:- 51～121℃

Static pressure and overload pressure limit:

When the DP type unidirectional overload pressure is 0-13.79Mpa, the transmitter will not be damaged, and the working static pressure range is 3.45-13.79Mpa.

When the HP type unidirectional overload pressure is 0-31Mpa, the transmitter will not be damaged, and the working static pressure range is 3.45-31Mpa.

AP type, will not damage the transmitter when the pressure is between 0-13.8Mpa, and the working pressure range is from 0 to the highest range.

The GP type has an overload pressure of 0-13.8 MPa for transmitters with a range up to 6.9 MPa, and 0-51.7 MPa for transmitters with a range of 41.37 MPa. In the above situation, the transmitter will not be damaged. The working pressure range is from 3.45Mpa to the upper limit of the transmitter measurement range.

The pressure resistance of the pressure chamber of the transmitter model is 68.95Mpa.

Temperature range: The relative humidity of the transmitter is 1-100%.

Volume change: less than 0.16cm3

Damping time: The damping time constant is continuously adjustable within 0.2-1.67s. When filling with other inert oils, the time constant is slightly larger.

Start time: 2 seconds, no preheating required.

Under no migration and standard reference conditions, the performance of the filled silicone oil and isolation membrane is made of 316LSST stainless steel.

Accuracy: Accuracy includes linearity, variation, and repeatability, as shown in the variety specification table.

Linear *: half of the precision.

Lag *: is half of the linear error, with a range of 5 equal to the linear error.

*Only applicable to DP type low, medium, and high differential pressure transmitters.

Non sensitive area: None

Stability: Within six months, the accuracy of the transmitter shall not exceed.

Temperature effect: at * * * * range (e.g. range 0-37.29Mpa)

·The zero position error is ± 0.5% of the measuring range/55 ℃

·The total error (including range and zero position errors - the same below) is ± 1%/55 ℃

·Note: 1151DP3 is twice the impact mentioned above.

·The zero position error of 1151DR2 in the * * * * range (0-7.46Kpa) is ± 1%/28 ℃ of the range, and the total error is 1%/28 ℃ of the range.

·For DP √ Δ P transmitters at high ranges, only the total error is considered, with a value of ± 1%/55 ℃. For range 3, the value is ± 2.5%/55 ℃

At the minimum range (e.g. 0-6.22Kpa in range 4)

·± 3% of zero position error range/55 ℃

·The total error is ± 3.5%/55 ℃

·Note: 1151DP3 is the second digit of the aforementioned influence.

Static pressure effects: The static pressure effects of DP, DP √ Δ P, HP, and DR types are shown in the table below

Overload pressure impact: For GP and AP type transmitters, the overpressure error shall not exceed 0.25% when overpressure occurs according to the provisions of the "Functional Specification" project at different high measurement ranges.

Vibration effect: The error caused by vibration frequency up to 200HZ in any direction is ± 0.05%/g within the range of * * * *

Power supply impact: less than ± 0.05%/V of the output range.

Load impact: When the power supply is stable, there is no load impact

Installation position influence: When the measuring membrane is not installed vertically, there may be a zero position error of no more than 0.24Kpa, which can be eliminated by zeroing and has no effect on the range.

Structural materials: including pressure chambers, joints, relief valves, isolation diaphragms, and other liquid contact materials. Please refer to the "Ordering Model Specifications" table for various models. The O-ring in contact with the medium is made of fluororubber, the bolts are plated with carbon steel, the electrical chamber of the amplifier is made of low copper aluminum alloy (NEMA4), and the surface coating is epoxy polyester

Pressure connector: The connection hole on the joint is 1/2NPT tapered pipe thread, and the connection screw hole on the pressure chamber (flange) is 1/4NPT.

The center distance can be found in the external dimension drawings of various models.