XG3051DP Differential pressure remote transmitter

Q1: What is the main purpose of the XG3051DP dual-flange remote transmitter for measuring?
A: Mainly used for measuring differential pressure; often used for measuring liquid level, flow rate, and medium density in closed tanks. Double flange capillary isolation structure, suitable for high viscosity, easy crystallization, strong corrosion, and high temperature media, to avoid medium blockage and corrosion of the sensor body, output 4-20mA+HART, and interface with DCS/PLC system.
Q2: What are the reasons for inaccurate zero point and numerical drift after double flange installation?
A: Drift can be caused by environmental temperature changes, capillary compression, membrane scaling and crystallization, and incorrect migration parameter settings. After installation, on-site zero point migration must be carried out; Avoid squeezing and small-radius bending of capillaries; When the operating temperature changes significantly, increase the instrument damping appropriately.
Q3: How to choose the material of flange diaphragm?
A: 316L stainless steel is selected for normal working conditions; Corrosive media can be selected from Hastelloy alloy and tantalum film. When placing an order, provide the medium name, temperature, and pressure for easy matching of diaphragm and capillary filling fluid.
Q4: What are the taboos for installing capillary tubes?
A: Cutting or hard bending of capillary tubes is not allowed; the minimum bending radius is> 50 mm, and they cannot be squeezed or bumped. The capillary tube is filled with sealing liquid inside. Once it is damaged and leaks, the instrument will directly fail and cannot be repaired on site.

Process connectivity instructions for unilateral forwarding without forwarding flanges

1/2-NPT Stainless Steel Elliptical Flange (Code 1)		1. Pressure Chamber Flange
		2. O-ring seal
		3. NPT 1/2 Elliptical Flange Connection
		4. Bolt
M20x1.5 Stainless Steel T-Connector (Code 2)		1. Pressure chamber flange
		2. M20×1.5 T-shaped male threaded fitting
		3. Bolt
		4. O-ring
		5. M20×1.5 nut
		6. Pressure lead-in tube

Measurement Parameters: Differential Pressure, Liquid Level

The minimum range of the remote transmitter should be the larger value between the minimum ranges in Table 1 and Table 2.
The adjustable range shall not be less than the minimum range. The maximum range of the remote transmitter shall be the smaller value between the maximum range of the transmitter body and the rated pressure of the level flange.

Output Signal
2-wire, 4–20 mA DC HART output, digital communication; the HART protocol is superimposed on the 4–20 mA DC signal.
Output Signal Limits: Imin = 3.9 mA, Imax = 20.5 mA

The damping constant of the amplifier component is 0.1 s; the time constant of the sensor and remote seal flange ranges from 0.2 ~ 6 s, depending on the sensor range, range ratio, capillary length, and viscosity of the fill fluid.
The additional adjustable time constant ranges from 0.1 ~ 60 s.

The transmitter body can be fixed at any position. The optimal installation condition is to keep the process flange shaft vertical. Position deviation will cause a correctable zero shift. The electronic housing can be rotated up to 360°, and the set screw can secure it at any angular position.
The remote seal flange connects to a mating flange complying with ANSI/DIN standards. The mating flange shall be equipped with a soft gasket and mounting bolts and nuts (bolts and nuts are optional for users).
For dual remote seal transmitters, the capillary assemblies and remote seal flanges shall be installed in an environment with the same ambient temperature as far as possible.
The minimum bending radius of the capillary is 75 mm. Coiling is strictly prohibited!

Environmental conditions

Process medium limit temperature limit
Medium temperature:-30~400°C

Note: Special attention should be paid to any values exceeding the above temperature and pressure range; these can be met through
special design.

Power and Load Conditions
Power supply voltage is 24V
R≤(Us-12V) /Imax kQ 2
where Imax=23 mA
Maximum power supply voltage: 42VDC
Minimum power supply voltage:12VDC,15VDC(backlight LCD display)
Digital communication load range: 250~600Q

Note: (1) A Performance Level Description: During testing, performance is normal within the technical specification limits.
(2) B Performance Level Description: During testing, functions or performance temporarily decrease or disappear but can recover on their own; actual operating conditions, storage, and data remain unchanged.

Figure 5: Electrical Connection Diagram

Note: The quick interface function is equivalent to the signal terminal.

Drawing 1: Basic Type Double-sided Differential Pressure Remote Seal Assembly Drawing	Drawing 2: Basic Type Single-sided Differential Pressure Remote Seal Assembly Drawing

Note:
(1) The single-sided basic type differential pressure remote seal assembly can be installed on either the high-pressure side or the low-pressure side of the transmitter body.
(2) The installation method of the transmitter body for single-sided or double-sided basic-type differential pressure remote seal assemblies is the same as that of the XG3051DP series differential pressure transmitter.

Note:Usercanoptionallyequipinsaatonbosannut.

Figure 3	Figure 4 Single-sided Thread-mounted Differential Pressure Remote Seal Assembly

Note:
(1) The single-sided thread-mounted differential pressure remote seal assembly can be installed on either the high-pressure side or the low-pressure side of the transmitter body.
(2) The installation method of the transmitter body for single-sided and double-sided thread-mounted differential pressure remote seal assemblies is the same as that of the XG3051DP series differential pressure transmitter.