summary
The sealing diaphragm is used to prevent the medium in the pipeline from directly entering the pressure sensor component of the pressure transmitter. It is connected to the transmitter by a capillary tube filled with fluid.
ECA438W and ECA438N diaphragm sealed pressure transmitters are used to measure the pressure of liquids, gases, and vapors, and then output 4-20mADC signals corresponding to the pressure.
Due to their ability to communicate with the HART275 handheld device, they can be remotely set and monitored.
Standard Technical Specifications
Communication line conditions
Power supply voltage: 16.4-42V DC (16.4-30V DC)
Communication distance: 2km, when using CEV cable
Load capacitance: below 0.22 μ F
Load inductance: below 3.3mH
Distance from power cord: 15cm or more
The input impedance of the receiving instrument connected to the receiving resistor is 2 At 4kHz, it is above 10k Ω
ambient temperature
-40-85 ℃ (-40-185 ° F) (General type)
-30-80 ℃ (-22-176 ° F) (with digital meter head)
Working pressure
2.7kPaabs(20mmHgabs)
Rated working pressure of flange
The impact of power supply voltage fluctuations
0.005%/V(21.6～32VDC，350Ω)
install
Transmitter: 2-inch pipeline installation
Diaphragm seal: flange installation
Installation flange specifications
The side of the flange in contact with the gasket according to ANSI specifications is serrated (according to ANSIB16.5)
Waterproofing Structure
JIS C0920 immersion type (equivalent to IECIP67 and NEMA4X)
Material of transmitter
Flange: JISSUS14A
Flange bolts: refer to the "Model and Specification Code Table"
Material of diaphragm seal
Capillary tube: JIS SUS316
Protective tube: JIS SUS304
PVC shielding (maximum operating temperature of PVC: 100 ℃)
Damping time constant
The sum of time constants for amplifier components and capsule components with diaphragm seals
Amplifier component time constant: 0.2-64 seconds, can be set in 9 stages
The value obtained at normal temperature when the capillary tube is 3m long and the injected liquid code A is used