1. Application

The diaphragm of the double flange remote diaphragm pressure transmitter is used to prevent the medium in the pipeline from directly entering the pressure sensor component of the transmitter. It uses a filling liquid such as silicone oil to transmit pressure to the transmitter.

SM39PWB-SFLYC The double flange remote diaphragm pressure transmitter is used to measure the level, density, and pressure of liquids, gases, or steam, and then converts it into a 4mA～20mADC HART current signal output. It can also communicate with a HART handheld terminal for parameter setting, process monitoring, etc.

SM39PWB-SFLYC The measurement range of the double flange remote diaphragm pressure transmitter (before migration) is 0-1kPa～2MPa. The rated pressure of the remote flange is 1.6/4MPa, 6.4MPa 10MPa, 150psi, 300psi, or 600psi.

2. Working principle

SM39PWB-SFLYC Double flange remote diaphragm pressure transmitter Structurally composed of SM39PWB-CY A series of differential pressure transmitters and a welded remote flange with capillary The working principle is the same as CY Series differential pressure transmitter （ CY Series differential pressure transmitter technical specifications ） The pressure acting on the remote flange side first passes through the diaphragm and filling liquid on the remote flange, then through the capillary, and finally reaches the corresponding positive and negative sides of the measuring sensor.

3. Input

Measurement parameters: Differential pressure, level measurement range

Lower limit: -100%URL Start （Continuously adjustable ）

Upper limit: to +100%URL (continuously adjustable)

Range

Table 1 Range code and range correspondence table

Table 2 Remote flange and minimum range correspondence table

The minimum range of the remote transmitter should be the larger value of the minimum range in Table 1 and Table 2 The adjusted range must not be less than the minimum range. The maximum range of the remote transmitter should be the minimum value of the maximum range of the transmitter body and the rated pressure of the level flange.

Output output signal

Two-wire, 4mA～20mADC HART Output, digital communication, HART Protocol loaded on 4mA～20mADC signal. Output signal limit: I mi n =3. 9 m A ， I max =2 0.5m A

4. Response time

The damping constant of the amplifier component is 0.1s ；The time constant of the sensor and remote flange is 0.2s ～6s It depends on the range, range ratio of the sensor, the length of the capillary, and the viscosity of the filling liquid. The additional adjustable time constant is: 0.1s～60s.

5. General conditions

1. 1. Installation conditions

The transmitter body can be directly fixed to any position. In a good state, the process flange shaft is vertical, and the positional deviation will produce a correctable zero offset. The electronic housing can be rotated up to 360 °, and the positioning screw can fix it in any position. The remote flange is connected to the matching flange that conforms to the ANSI/DIN standard. The matching flange should be equipped with a soft gasket and mounting bolts and nuts （Optional mounting bolts and nuts for users ） . For double-sided flange remote transmitters, the capillary component and remote flange should only be installed in the same ambient temperature as possible. The minimum bending radius of the capillary is 75mm, no coiling allowed!

1. 2. Environmental Conditions

Ambient Temperature

Minimum: Depends on the filling liquid

Maximum: 85℃

With LCD display and fluoro-rubber seal: -20℃～65℃ Storage temperature/Transportation temperature

Minimum: Depends on the filling liquid Maximum: 85℃

Relative Humidity: 0%～100%

Impact Resistance Acceleration: 50g

Duration: 11ms

Vibration Resistance 2g to 500Hz

Electromagnetic Compatibility (EMC)

See Table 4 "Electromagnetic Compatibility Appendix" on the next page

1. 3. Process Media Limits Temperature Limits

Medium Temperature: -30℃～400℃

Table 3 Relationship Table of Filling Liquid, Operating Temperature and Minimum Operating Static Pressure

Note: Those exceeding the above operating temperature and static pressure relationship range should be specially pointed out, and the requirements can be met through special design. Transmitter body pressure limit

From 3.5kPa Absolute pressure to rated pressure, the protection pressure can be greater than the rated pressure 1.5 times, applied to both sides of the transmitter simultaneously. Remote flange rated pressure

ANSI Standard: 150psi～600psi

DIN Standard: PN 1.6MPa ～PN 10MPa

Unidirectional Overload Limit

The low-pressure side is the rated pressure of the transmitter body, and the high-pressure side is the rated pressure of the remote flange. Correctible zero drift may occur.

Weight

Unilateral remote transmission is DN 50/2″ about 7～10kg, DN 80/3″ about 8～11kg, DN 4″ about 9～12kg;

Bilateral remote transmission is DN 50/2 ″ about 10～16.5kg, DN 80/3″ about 12～18kg, DN 4″ about 14～21kg.

1. 4. Power and Load Conditions The power voltage is 24V

R ≤ (U s -12 V )/ I ma x k Ω Where I ma x =2 3 m A

Maximum supply voltage: 42VDC

Minimum supply voltage: 12VDC, 15VDC (backlit LCD display) Digital communication load range: 250Ω～600Ω

Material

Measuring diaphragm: 316L stainless steel

Diaphragm: 316L stainless steel, Hastelloy C, tantalum Process flange: 304 stainless steel

Filling fluid: silicone oil, high-temperature silicone oil, ultra-high-temperature silicone oil, vegetable oil

Seal: Nitrile rubber （ NB R ） 、fluororubber（ FK M ） 、polytetrafluoroethylene （ PT F E ）Transmitter housing: Aluminum alloy material, epoxy resin coated exterior

Housing seal: Nitrile rubber (NBR)

Nameplate: 304 stainless steel

Electrical connection

M20 X 1.5 Cable gland, terminal block suitable for 0.5 m m 2 ~ 2.5 m m 2  wires. Process connection

The transmitter low-pressure side has a NPT 1/4 internal thread.

The transmitter high-pressure side level flange conforms to ANSI standard or DIN standard. It can be installed directly, refer to the dimensions. Housing protection level: IP67

Table 4 Electromagnetic Compatibility Appendix

Note 1: A Performance level description: During testing, the performance is normal within the technical specification limits.

Note 2 : B Performance level description: During testing, the function or performance is temporarily reduced or lost, but can recover automatically, the actual operating status, storage and data are not changed.