Basic situation
The SKID type electromagnetic flowmeter passes through the embedded GPRS wireless transmission module to transmit the instantaneous flow rate, instantaneous velocity, cumulative flow, conductivity ratio, GPRS signal strength and other data to the server. The user can monitor the relevant data information of the flowmeter by logging on the server website, and can query the management information of the data, traffic curve, daily accumulations and monthly accumulations.
The remote data acquisition system also has the function of map display, which can show the location of the flowmeter in real use. And equipped with the user and page multi-level privilege group management function, the real implementation of the unlimited remote and data integrated management purpose.
1. The interface of the operation.
2. Carry out the operation analysis of the whole heat network system, have powerful statistics and query functions, and grasp the pipe loss situation of the pipe network in real time.
3. Collect the temperature, pressure, flow and operation parameters of each user sub-station in real time and monitor the operation of each measuring instrument in real time.
4. Query any time period of any user.
5. Communication power failure, temperature, pressure and flow parameters of the sub-stationAbnormal production failure records and summary of failures,And send it to the hotnet manager via SMS.
6. Automatically genements Table, etc., and can print out the output.rate billing state
7. User substations and scheduling terminals can communicate with each other.
8. Uninterruptible power design to ensure the detection point is always online.
9. Can master metering instrument information anytime and anywhere.
10. Technical library management, configuration design.
11. Networked design to support remote access function.
12. Support simulation screen or projector display.
GPRS function: electromagnetic flow converter installs the SIM card through GPRS signal transmission through the mobile phone and PC to the unified web page
Data platform, input the electromagnetic flow meter corresponding to each SIM card phone number, check the flow data at any time.
1. Check the data through the website of mobile phone.
2. Wireless to workstation and view data through workstations.
According to Faraday's law of electromagnetic induction, in the uniform magnetic field of magnetic induction intensity for B, perpendicular to the direction of the magnetic field with a diameter of D is not permeable pipe, when conducting liquid flow in the pipeline with velocity v, conductive fluid cutting lines. If on both ends of the diameter of the pipe cross section perpendicular to the magnetic field on the installation of a pair of electrodes can be proved that the velocity distribution for axisymmetric distributions, as long as the pipe to produce induced electromotive force between two electrodes:
E = KBDv (3-36)
In the formula, v is the average velocity of the pipe cross section, k is the instrument constant. The volume flow of the pipeline can be:
Qv = PI eD/4KB (3-37)
By the visible on the type, volume flow rate qv and induction electromotive force e and a linear relationship with sounding pipe diameter D, and inversely proportional to the magnetic induction intensity of the magnetic field B, has nothing to do with the other physical parameters. This is the principle of measurement of the electromagnetic flowmeter.
It is necessary to state that the formula (3-37) is strictly established, and the electromagnetic flowmeter must be made to meet the following assumptions:
The magnetic field is the constant magnetic field of uniform distribution;
The axial symmetry distribution of flow velocity is measured.
The liquid is nonmagnetic;
The conductivity of the liquid is uniform and isotropic.
Flow measurement range: 0.1 ~ 15m/SEC, velocity resolution: 0.5mm/SEC
Measuring pipe diameter: 3 ~ 3000 (mm)
Supporting accuracy grade: 0.5
Excitation frequency: 3.12 HZ, 4.16 HZ, 6.25 HZ, 12.5 HZ, 25HZ, 30HZ
Field current: 125 ma excitation coil resistance of 100 ~ 120 Ω (high frequency excitation must choose)
187 ma Ω excitation coil resistance of 60 ~ 80
250 ma excitation coil resistance 50 ~ 60 Ω
Air tube measurement: no additional electrode can be used for measurement of air tube
Detection alarm parameters: excitation current detection alarm
Output current: 4 ~ 20 ma output when the load resistance of 0 ~ 750 Ω
Basic error: 0.1% plus or minus 10 mu A
Frequency output range: 0 ~ 5000Hz
Pulse output equivalent: 0.001 ~ 59.999 ukg
0.001 ~ 59.999 ukg
Pulse output width: 1 ~ 500ms adjustable
Frequency pulse output: OC gate output; Isolation voltage is greater than DC1000V;
Field effect tube output: maximum load voltage DC36V, maximum load current 100mA.
Alarm display: air tube alarm, excitation alarm, instantaneous flow rate, lower limit alarm, small signal removal alarm and flow bar alarm
Alarm output: air tube alarm, instantaneous flow, lower limit alarm, small signal removal alarm and flow bar alarm
Gate output: photoelectric isolation, isolation voltage: DC 1000V;
Field effect tube output: maximum load voltage DC36V, maximum load current 100mA.
Power supply: AC 85V ~ 250V,46 ~ 63Hz, power <20W
DC 20V ~ 36V, power <20W
Shell protection grade: IP65
Explosion-proof grade: Exd IIC T6 Gb
Installation: the round shell is one-piece and the shell is connected directly to the sensor flange
Communication interface: GPRS communication
Language Settings: simplified Chinese, traditional Chinese, Spanish, Portuguese, Italian, Russian, French display (customizable other languages)
Display mode: 128 x 128 large-screen LCD display, rotating liquid crystal display direction (L28)
Key liquid crystal (L32)
Data reading function (L32D)
Large liquid crystal (L64)
Operation mode: optical touch key, ordinary button, remote control (optional)
Flow product calculation function: the total amount of two integrators can be recorded in the interior: the total amount of positive quantity and the total amount
Ambient temperature: - 10 ~ + 55 ℃
Relative humidity: 5% ~ 90%
Linear correction: using the line correction method, the international common, the setting is convenient.
