Production of Yokogawa Steam Flow Meter

DY Yokogawa Steam Flow Meter from Japan

Shanghai Hengyi Electromechanical Equipment Co., Ltd. is a professional engineering solution provider for Yokogawa (YOKOGAWA) field instruments in Japan, focusing on the dissemination and promotion of YOKOGAWA resonant monocrystalline silicon technology and electromagnetic flow measurement technology in China. At the same time, utilizing * technology and experience, it provides more reference solutions and choices for automation and field control in China.

DY Yokogawa Steam Flow Meter from JapanBasic technical specifications：
New features with SSP (Digital Signal Processing) technology
SSP is a part of the digital vortex flowmeter circuit. SSP can analyze the fluid situation inside the digital vortex flowmeter and automatically make adjustments based on the usage conditions using the analyzed data. SSP can correctly detect vortices in low flow areas, thereby significantly improving measurement stability. This feature is a digital signal processing technology developed by Yokogawa Corporation in Japan, which has never been present in previous vortex flowmeters.
Self diagnostic function
Capable of identifying and displaying usage conditions such as significant pipeline vibrations and abnormal flow patterns.
High precision
± 0.75% of reading (liquid)
± 1% of reading (gas, steam)
Large temperature range
High temperature type: can reach up to 450 ° C
Low temperature type: the lowest can reach -200 ° C
Simple parameter setting
Frequent use of parameter combinations in one module reduces parameter setting time.
Clear and concise display
Can display traffic, cumulative traffic, and self diagnostic information simultaneously.
Analog/pulse dual output
Simultaneously output flow signal and pulse signal
Alarm output
If an alarm occurs, an alarm signal will be output.
Status output (flow switch function)
When an alarm occurs, the contact outputs an alarm signal. In addition, when the flow rate is lower than the set value, a signal can be output through the contact.
Compact converter structure
Equipped with BRAIN/HART communication and panel setting buttons
Sensors with the same structure can be used to measure liquids, gases, and vapors
Stainless steel sensor without moving parts, durable and safe
Complies with NACE standards
Compliant with NAMUR 43 standard
The maximum length of the separated cable is 30m
Explosion proof structure: JIS/FM/ATEX/CSA/SAA (explosion-proof/intrinsic safety)

Basic performance indicators
Tested fluids: liquid, gas, vapor (avoid multiphase flow and adhesion)
Measurement flow range: see general specification sheet
Accuracy: ± 0.75% of reading (liquid), ± 1% of reading (gas, vapor)

Repeatability: ± 0.2% of the reading
Calibration: The flowmeter undergoes water calibration before leaving the factory

Normal working conditions:
Fluid temperature range: -40~260 ° C (general type)
-200~100 ° C (low temperature type, selected)
-40~450 ° C (high temperature type, selected)
Operating pressure range: -0.1Mpa (-1kg/cm2)~flange rated value
Environmental temperature range: -40~85 ° C (separated sensor, separated converter)
-40~85 ° C (integrated type)
-30~80 ° C (integrated with header)
Environmental humidity: 5~99.9%RH (at 40 ° C) (no condensation)
Power supply voltage: 10.5~42V DC (see the relationship diagram between power supply voltage and load resistance)
Electrical performance: Due to the use of common terminals for pulse output, alarm output, and status output, these functions cannot be used simultaneously.
Output signal: Dual output (can simultaneously obtain analog and transistor contact output signals). In this case, refer to the power supply and pulse output wiring in the "Installation Instructions" section.
Analog output: 4~20mA DC, 2-wire system
Transistor contact output: collector open circuit, 3-wire system
Use parameter settings to select pulse, alarm, or status output.
Contact rating: 30V DC, 120mA DC
Low level: 0~2V DC
Communication conditions:
Communication signal: BRAN or HART communication signal (superimposed on a 4~20mA DC signal).
Communication line conditions: Load resistance: 250~600W (including cable resistance)
Power supply voltage: 16.4~42V DC is used for digital communication BRAIN and HART protocols (intrinsic safety type is 16.4~30V DC). Distance from other power lines: greater than 15cm (avoid parallel wiring).
Steam flowmeter Yokogawa, JapanBRAIN:
Communication distance: 2km PVC shielded cable with polyethylene insulation (when using "CEV" cable), the communication distance varies depending on the type of cable used.
Load capacitance: less than 0.22mF
Load inductance: less than 0.33mH
Accepting input impedance of the instrument: greater than 10kW at 2.4kHz
Steam flowmeter Yokogawa, JapanHART：
Communication distance: When using multi stranded twisted pair cables, it can reach 1.5 km, and the communication range varies depending on the type of cable used.
Cable length for special applications: The cable length can be calculated using the following formula for special applications
Steam flowmeter Yokogawa, JapanFunction:
Damping time constant: 0~99 seconds (63% response time)
Note: Delay time: 0.5 seconds, analog output circuit time constant: 0.3 seconds
Pulse output function: Pulse output:
Calibration pulse, non calibration pulse, frequency (at 99.9%)%Number of pulses output per second during output

Pulse frequency: up to 10 kHz

Duty cycle: approximately 50% (1:2~2:1)
Self diagnosis and alarm output *: If an alarm occurs (out of range output signal, EEPROM error, vibration noise, blockage, bubbles, etc.), an alarm output signal will be displayed. When an alarm is triggered, the alarm output signal changes from ON to OFF state.
Status output function: Flow switch: If the flow rate is lower than the set flow rate value, it will output a status signal. The output mode of the status signal can be switched (ON/OFF).
Data protection in case of power failure: Data (parameters, cumulative values, etc.) are stored in EEPROM and do not require a backup battery.
Steam flowmeter Yokogawa, JapanCompensation function:
Instrument error compensation: The instrument error of the vortex flowmeter can be compensated for using 5 approximate polylines (with 5 compensation coefficients set).
Reynolds number compensation: When the Reynolds number is less than 20000, the output error can be compensated using 5 approximate polylines.
Gas expansion coefficient compensation: When measuring compressible gases and vapors, the expansion coefficient can be used to compensate for errors at flow rates higher than 35m/s.
Hardware fault output: If the CPU or EEPROM fails, the analog output current is at the upper limit value of 21.6mA. The upper or lower limit (£ 3.6mA) of the analog output current can be selected through jumper wires.
Display: It can simultaneously display instantaneous flow and cumulative flow expressed in% or flow units. Parameters can be set using the setting keys. Display brief information on self diagnosis. The installation direction of the monitor can be rotated 90 degrees left and right.
Compliant with EMC standard: EN61326 AS/NZS 2064
Note: The signal cable of the separated converter should be wired with metal conduit

Steam flowmeter Yokogawa, JapanCommon models include:

DY015-DALAJ1-0D,DY015-EALAJ2-0D

DY025-DALAJ1-0D,DY025-EALAJ2-0D

DY040-DALAJ1-0D,DY040-EALAJ2-0D

DY050-DALAJ1-0D,DY050-EALAJ2-0D

DY080-DALAJ1-0D,DY080-EALAJ2-0D

DY100-DALAJ1-0D,DY100-EALAJ2-0D

DY150-DALAJ1-0D,DY150-EALAJ2-0D

DY200-DALAJ1-0D,DY200-EALAJ2-0D

DY250-DALAJ1-0D,DY250-EALAJ2-0D

DY300-DALAJ1-0D,DY300-EALAJ2-0D