JZ-3851/1851DP series differential pressure transmitter productssummary:

The 3851/1851DP series small capacitive pressure (differential pressure) transmitter is a new type of transmitter produced by our factory by introducing advanced foreign technology and equipment. The key raw materials, components, and parts are all imported, and the whole machine has been strictly assembled and tested. This product has advanced design principles andFeatures such as complete specifications and easy installation and use. At the same time, it can directly replace traditional 1151 and other well-known similar products, with strong universality and substitution ability. In order to adapt to the continuous improvement and development of domestic automation level, this product not only has a compact and exquisite design, but also introduces HART technologyThe intelligent function of fieldbus protocol.

characteristic:

1. High precision 2, good stability 3, two-wire system (special can be four wire system) 4, solid components. Plug in printed circuit board 5. Small, lightweight, sturdy and anti vibration 6. Range and zero point can be continuously adjusted externally 7. Positive transfer can reach 500%, negative transfer can reach 600% 8. Damping can be adjusted

9. Good one-way overload protection characteristics 10. No mechanical movable parts, less maintenance workload 11. Unified structure across the entire series, strong interchangeability of components (316L, TAN/HAS-C/ONEL and other corrosion-resistant materials) 12. Explosion proof structure, all-weather use 13. Intelligent HART fieldbus

Agreement

working principle:

The process pressure is transmitted to the center measuring diaphragm of the chamber through the isolation diaphragm on both sides or one side, and the filling liquid. The central diaphragm is a tense elastic element that produces corresponding deformation displacement in response to the pressure difference acting on it on both sides. Its displacement is proportional to the differential pressure, with a maximum displacement of about 0.1mm

This displacement transformation forms a differential capacitor on the capacitor plate, which is converted into a two-wire 4-20mA DC signal output by electronic circuits.

Functional parameters:

Target users: liquids, gases, and vapors Measurement range: 0~0.1KPa to 0~40MPa Output signal: 4~20mA DC (special can be supplied with 220V four wire system for 0~10mA DC output)

Power supply: 12-45V DC, usually 24V DC

Load characteristics:

Related to the power supply, with load capacity at a certain power supply voltage, the relationship between load impedance RL and power supply voltage Vs is: RL ≤ 50 (Vs-12)

Indicator table:

Pointer type linear indication with 0~100% equal division scale or LCD liquid crystal or LED digital display.

Explosion proof:

A、 Explosion proof type dllBE4 B, intrinsic safety type iallct6

Range and Zero Point:

External continuous adjustable

Positive and negative migration:

After the zero point undergoes positive or negative migration, the absolute values of the upper and lower limits of the measuring range and measurement range cannot exceed 100% of the upper limit of the measurement range. (Intelligent type: Range 15:1)

The maximum positive transfer is 500% of the minimum calibration range, and the maximum negative transfer is 600% of the calibration range

Temperature range:

Amplifier operating temperature range: -29~+93 ° C (LT type: -25~+70 ° C)

Measuring element filled with silicone oil: -40~+104 ° C

When filling high-temperature silicone oil into a flange transmitter: -20~+315 ° C, ordinary silicone oil: -40~149 ° C

Static pressure:

1、 4、 10、 25、 32Mpa

Temperature:Relative humidity ranges from 0% to 100%

Volume suction capacity:<0.16cm3

Damping (step response):When filling silicone oil, it is generally continuously adjustable between 0.2s and 1.67s

Technical data:

(Without migration, under standard working conditions, filled with silicone oil, 316 stainless steel isolation diaphragm)

Accuracy:± 0.25%, ± 0.5%, ± 0.1% (intelligent type)

Dead zone:None (≤ 0.1%)

Stability:Absolute value of basic error not exceeding the maximum range within six months

Vibration impact:In any axial direction, when the vibration frequency is 200Hz, the error is ± 0.05%/g of the upper limit of the measurement range

Power supply impact:Less than 0.005% V of the output range

Load impact:If the power supply is stable, the load is not affected

other:

Isolation membrane:316 stainless steel, Hastelloy C-276, Monel alloy or tantalum

Exhaust/Drain Valve:316 stainless steel, Hastelloy C, Monel alloy

Flange connector:316 stainless steel, Hastelloy C, Monel alloy

Contact medium "o" ring:Nitrile rubber, fluororubber

Filling fluid:Silicone oil or inert oil

Bolt:316l stainless steel

Electronic casing material:Low copper aluminum alloy

Pressure connector:Flanges NPT1/4, Center distance 54mm, joint NPT1/2 or M20X1.5 male screw ball cone seal, center distance with joint 50.8/54/57.2mm (NPT cone tube screws comply with GB/T12716-91)

Signal line connection hole:G1/2”

Weight:2.4Kg (3851 standard type) 3.5Kg (1851 standard type)