1. Overview

Lmag-W800 series is a battery powered electromagnetic water meter converter series developed by our company. This series of converters can be matched with ordinary electromagnetic flow meter sensors and achieve a flow measurement accuracy of 0.5 level. That is to say, simply replacing the original ordinary electromagnetic flowmeter with an Lmag-W800 converter, users have developed a new product - the electromagnetic water meter series.

The Lmag-W800 electromagnetic water meter converter comes standard with a conventional lithium battery pack, which can last for more than 3 years of operation. If equipped with a high-capacity lithium battery pack, the continuous working time will be longer.

The Lmag-W800 electromagnetic water meter converter can use a base station wireless communication network system to establish a communication base station in the regional center, with a coverage radius of 1000 meters. Each electromagnetic water meter communicates with the base station in close range (SRD mode) using the 928MHz open frequency band (US standard). The base station completes data communication with the management computer through GPRS or CDMA mobile communication network. In addition, the Lmag-W800 electromagnetic water meter converter can also directly communicate data with the management computer through GPRS or CDMA mobile communication networks.

The Lmag-W800 electromagnetic water meter converter adopts a die cast aluminum case and an IP68 sealed protection design, which can be used in damp environments such as underground wells.

2. Performance indicators

Working environment temperature: -20 ℃ -50 ℃

■ Working environment humidity: ≤ 95%

■ Shell protection level: IP68

Flow velocity measurement range: 0-15 meters per second

■ Medium conductivity: Clean water>20 μ s/cm

■ Suitable for measuring diameter: DN10-1000

■ Matching accuracy level: 0 Level 5, Level 1

Measurement parameters: instantaneous flow rate, instantaneous flow velocity

■ Record parameters: cumulative total traffic, 32 sets of event records

■ Detection and alarm parameters: Fluid tube detection and alarm

Excitation current detection alarm

Battery capacity detection alarm

Calibration output signal: unit volume flow pulse

Wireless communication methods: SRD, GPRS, CDMA

■ Battery working time

Battery working time - Sensor aperture correspondence table (1/15Hz) excitation frequency

Battery working time - Sensor caliber correspondence table (1/30HZ) excitation frequency

The electromagnetic water meter converter of this caliber requires special customization.

3. Sensor matching requirements

▲ Sensor excitation coil resistance: 30-50 ohms (two coils in series)

▲ Sensor flow signal strength: 150-200 microvolts (flow rate of 1 meter/second)

Explanation:When calibrating the flow rate, the marked sensor coefficient is 1 Around 0000 indicates that the sensor flow signal strength meets the requirements. The sensor coefficient is greater than 1 0000 indicates that the sensor has low flow sensitivity and a sensor coefficient of less than 1 0000 indicates that the sensor has high flow sensitivity. Sensors have higher flow sensitivity, which is beneficial for improving the stability and accuracy of flow meter measurements.

　　In principle, for ordinary sensors equipped with a Lanshen 250mA excitation converter, as long as their calibration coefficient is within 1 Below 0000, Lmagw_800 converters can achieve good compatibility.