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On site display vortex flowmeter
1、 Basic Overview: The three wire/two wire E-series display circuit is a new simplified circuit for vortex flowmeters, with an analog amplification ci
Product details
1、 Basic Overview
three-wire/two-wire systemEThe series display circuit is a new simplified circuit of the vortex flowmeter, and its amplification circuit is analog. It can accurately measure the flow rates of gases, liquids, and vapors within the conventional flow range. It can be set by a switch to adapt to various calibers and measurement media. The data post-processing and signal remote transmission circuits are divided into three wire and two wire systems. Three wire system can be carriedRS485Communication and can be powered by batteries. Used for second-line system4-20mAelectric currentOutput and provide isolated raw pulse output.
2、 Main technical parameters
1Applicable caliber:DN15-DN300Supply according to other caliber agreements.Applicable medium: Gas, steam, liquid.
2Environmental conditions: Environmental temperature:(-30~+70)℃/(-20~+60℃ LCD display).
Relative humidity:5%~90% Atmospheric pressure:(86~106)kPa.
Medium temperature:(-50~+250) ℃，(-50~+350) ℃.
3Power supply:
ａ）Three wire system:
（1） When using an external power source:12~24VDC/30mA(-20%~+15%)No output can be as low as9V.
（2） When powered by batteries (optional): lithium battery3.6V(2-13Ah)/0.3mA.
b）Second line system: 12~24VDC/4-20mA(-20%~+15%).
4Output signal
ａ）Three wire system:
（1） Pulse output: High level ≥8V(Supply voltage)-1V）. Low Level<0.5V.
（2） contain1K5Open collector output of pull-up resistor.
（3） RS485Communication: Instrument configurableRS485Communication interface. Communication distance ≤1200mm.
b）Second line system:
（1） second-tier4~20mALinear correction current output（24VTime circuit load ≤600Ω）.
（2） Optical isolation without correction original pulse output: High level ≥5V(Supply voltage)-1V）.
（3） Low Level<0.5V; Including1K5Open collector output of pull-up resistor. Additional supply required12VPower Supply.
3、 User menu operation
（1） Work screen
After connecting the power supply, the instrument first performs a self check and enters the screen after completion1The work master displays the status.
chart 1 VT3WEThree wire work screen1interface
chart 2 VT2WETwo wire work screen1interface
First line: Cumulative measurement;2Decimal display, decimal point automatically rounded up. The non time part of the unit is consistent with the instantaneous flow unit
Second line: Instantaneous flow rate; Retain decimals2Please refer to the menu settings for detailed information on the location and flow unit
Third line: Flow signal frequency value; displayF=XXXX.XX Hz. Reserved2Display decimal places.
Fourth line: Output current value; displayI= XX.XX mA, Reserved2Decimal display (only available)2WType)
VTE3WThe bottom right corner of the three wire system shows the battery level indicator, which displays the battery level when the instrument is powered by a battery.
Press“<”Key or“+”Living and working screen2Compared to the work screen1Switching between
chart 3 working screen2Sub interface
First line: Temperature setting value; Used for temperature compensation related calculations. displayT≡999.9℃. reserve1Display decimal places.
Second line: Pressure setting value; Used for calculations related to pressure compensation. displayP≡99999.99kPa, Reserved2Decimal places.
Third line: Password to enter the settings mode.
Press“E”Enter password with the keyEnter initial state. Press“S”Press the key to cancel the input mode and return to the second screen display.
Press“+”The key is in input mode, and the value at the cursor is cyclically changed. Press“<”Move the current input cursor position;
Press in input mode“E”Key, submit verification password. If it is correct, enter the menu; if it is incorrect, return to the initial input state.
chart 4 Initial state of password input
（2） User parameter settings
Press“S”Press the key to exit the input state. Press“E”Press the key to confirm and save the input.
Press“+”Key, cycle to change the value or symbol at the cursor. Press“<”Press the key to move the current input cursor one position to the right.
input8Bit data (including symbols and decimal points).
2Menu operation:In menu browsing
Press“+”Flip down the key; Press“<”Flip up key; Press“E”Enter the submenu with the key. Press“S”Key, return to the work screen2Interface.
In the submenu, press“S”Key exit; Press“E”Key learning transformation. In the modified state, if the selection item is changed, press“+”Press down to select; Press“<”Select upwards, press“E”Confirm with the key. If it is an input based modification, follow the input operation.
Attention: When setting parameters, the displayed content should be according to“E”Only after confirming the key can it be stored, otherwise the setting is invalid
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