BXY6001 Differential Pressure Remote Transmission Transmitter
1 Application
The diaphragm box of the differential pressure remote transmitter is used to prevent the medium in the pipeline from directly entering the pressure sensor component of the differential pressure transmitter. It uses silicone oil and other filling liquids to transmit pressure between the transmitter and it.
The BXY6001 differential pressure remote transmitter is used to measure the liquid level, density, pressure, and flow rate of liquids, gases, or vapors, and then convert it into a 4-20mADC HART current signal output. BXY6001 can also communicate with RST375 handheld terminals or RSM100 Modems for parameter setting, process monitoring, etc. The measurement range of BXY6001 differential pressure remote transmitter (when not relocated) is 0-1kPa~2MPa, and the rated pressure of the remote flange is 1.6/4MPa, 6.4MPa, 10MPa, 150psi, 300psi, or 600psi, respectively.
2 Working principle
The BXY6001 differential pressure remote transmission transmitter consists of a BXY6001 series differential pressure transmitter and a welded and installed capillary remote transmission flange. Its working principle is the same as the BXY6001 series differential pressure transmitter (refer to the technical specifications of the BXY6001 series differential pressure transmitter), but the pressure transmission path is slightly different: 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 measurement sensor.
3 inputs
Measurement parameters: differential pressure, liquid level
Measurement range
Lower limit value: from -100% URL (continuously adjustable)
Upper limit value: to+100% URL (continuously adjustable)
Range
Table 1 Comparison Table of Range Code and Range Range Relationship

Table 2 Comparison Table of the Relationship between Remote Transmission Flange and Minimum Range

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 shall not be less than the minimum range. The maximum range of the remote transmitter should be the minimum of the maximum range of the transmitter body and the rated pressure of the liquid level flange.
4 outputs
output signal
2-wire system, 4-20mADC HART output, digital communication, with HART protocol loaded on 4-20mADC signal.
Output signal limit: Imin=3.9mA, Imax=20.mA
Alarm current (mode can be set)
Low alarm mode (minimum): 3.7 mA
High alarm mode (maximum): 21 mA
No alarm mode (hold): maintain the effective current value before the fault
Alarm current standard setting: high alarm mode
5 Response time
The damping constant of the amplifier component is 0.1s; The time constant of the sensor and remote flange is 0.2-6s, depending on the sensor's range, range ratio, capillary length, and viscosity of the filling liquid. The additional adjustable time constant is 0.1~60s.
6 General conditions
6.1 Installation conditions
The transmitter body can be directly fixed in any position. The optimal state is to keep the process flange axis in a vertical position, and the positional deviation will result in a correctable zero offset. The electronic watch case can rotate up to 360 °, and the positioning screw can fix it in any position.
The remote flange is connected to a matching flange that complies with ANSI/DIN standards. The matching flange should be equipped with soft gaskets and fixed bolts and nuts (users can choose to install bolts and nuts).
For bilateral flange remote transmitters, capillary components and remote flanges should only be installed in the same ambient temperature. The minimum bending radius of the capillary is 75mm, and winding is strictly prohibited!
6.2 Environmental conditions
ambient temperature
Minimum: depending on the filling fluid
Maximum: 85 ℃
When equipped with LCD display and fluororubber sealing ring, -20~65 ℃
Storage temperature/transportation temperature
Minimum: depending on the filling fluid
Maximum: 85 ℃
Relative humidity: 0-100%
Impact resistance
Acceleration: 50g
Duration: 11ms
Anti vibration
2g to 500Hz
Electromagnetic compatibility (EMC)
See Table 4 "Electromagnetic Compatibility Schedule" on the next page
6.3 Process Medium Limits
Temperature limit
Medium temperature: -30~400 ℃
Table 3 Relationship between Filling Fluid, Working Temperature, and Minimum Working Static Pressure

Note: Those exceeding the range of working temperature and static pressure relationship above should be specifically pointed out, and special designs can be used to meet the requirements.
Transmitter body pressure limit
From an absolute pressure of 3.5kPa to the rated pressure, the protective pressure can be greater than 1.5 times the rated pressure and applied to both sides of the transmitter.
Rated pressure of remote transmission flange
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, while the high pressure side is the rated pressure of the remote flange, which may cause adjustable zero drift.
Weight
Unilateral remote transmission is about 7-10kg for DN 50/2 ", 8-11kg for DN 80/3", and 9-12kg for DN 4 ";
Bilateral remote transmission is about 10-16.5kg for DN 50/2 ", 12-18kg for DN 80/3", and 14-21kg for DN 4 ".
Explosion proof performance
NEPSI Flameproof License: Ex d Ⅱ C T6
NEPSI Intrinsic Safety License: Ex ia IIC T4
Permissible operating temperature: -40 ℃~65 ℃
6.4 Power supply and load conditions
The power supply voltage is 24V
R ≤ (Us-12V)/Imax k Ω
Where Imax=23 mA
Maximum power supply voltage: 42VDC
Minimum power supply voltage: 12VDC, 15VDC (backlight LCD display)
Digital communication load range: 250~600 Ω
material quality
Measurement capsule: stainless steel 316L
Diaphragm: stainless steel 316L, Hastelloy C, tantalum
Process flange: stainless steel 304
Filling fluid: silicone oil, high-temperature silicone oil, ultra-high temperature silicone oil, vegetable oil
Sealing ring: nitrile rubber (NBR), fluororubber (FKM)
Polytetrafluoroethylene (PTFE)
Transmitter housing: aluminum alloy material, with epoxy resin sprayed on the surface
Shell sealing ring: nitrile rubber (NBR)
Nameplate: stainless steel 304
Electrical connections
M20X1.5 cable sealing buckle and wiring terminal are suitable for wires ranging from 0.5 to 2.5mm2.
Process Connection
The low pressure side of the transmitter has NPT 1/4 and UNF 7/16 internal threads. The liquid level flange on the high-pressure side of the transmitter complies with ANSI or DIN standards. Can be installed directly, refer to Page 42 Part 7.
Shell protection level: IP67
Table 4 Electromagnetic Compatibility Schedule

Note: (1) A performance level description: During testing, the performance is normal within the technical specification limits.
(2) B performance level description: During testing, the function or performance is temporarily reduced or lost, but it can recover on its own, and the actual operating status, storage, and data remain unchanged.
7 Dimensions in millimeters
Figure 1 Basic bilateral differential pressure remote transmission sealing device diagram

Figure 2 Basic Single Side Differential Pressure Remote Transmission Sealing Device Diagram

Note: (1) The unilateral basic differential pressure remote sealing device can be installed on the high-pressure side of the transmitter body or on the low-pressure side of the transmitter;
(2) The installation method of the transmitter body for single or double sided basic differential pressure remote transmission sealing devices is the same as that of the BXY6001 series differential pressure transmitter.
Table 5 Structural Dimensions of Remote Transmission Flange