T: +86-577-59970799
E: wpt0125978@163.com
E: wpt0125978@163.com
No.17 Binhai 3rd Road, Yongxing Street, Longwan District, Wenzhou City, Zhejiang Province
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WEM
WEIDU
WEM Volume Corrector is an intelligent secondary instrument for pulse-output gas flow meters (turbine, rotary, vortex, etc.). Featuring high-precision digital sensors, it displays on-site pressure and temperature and converts operating volume to standard condition volume. With multiple signal outputs for system integration, it offers advanced domestic technology—ideal for city gas, petroleum, chemical, and metallurgical applications.
Utilizes advanced microcomputer technology and high-performance integrated chips, delivering powerful functionality and superior performance.
Features surface-mount technology (SMT) in circuit design, offering compact structure, strong anti-interference capability, and high reliability.
Built-in pressure, temperature, and flow sensors for a more compact design.
Equipped with self-diagnosis and alarm functions for high reliability. An LCD display ensures clear, intuitive reading and user-friendly operation.
Includes a built-in real-time database to prevent data loss during battery replacement or sudden power failure. Internal parameters are permanently stored even during power outages, preserving user settings, manufacturer parameters, and certain historical records.
High-contrast LCD display shows date, standardized total flow, standardized instantaneous flow, medium temperature, and pressure values.
Measures gas temperature, pressure, and flow rate with automatic flow tracking compensation and compressibility factor correction. Displays cumulative gas volume flow at standard conditions (PN = 101.325 kPa, Tn = 293.15 K) (intelligent model only). Supports NX19, SGERG-88, and AGA8-92 compressibility calculations.
Allows multi-segment meter coefficient setting and automatic correction.
Self-diagnosis for pressure and temperature sensor faults (smart models only), displayed directly on the LCD. In case of sensor failure indicated by "flashing," the flow totalizer automatically switches to predefined pressure or temperature values for correction, ensuring mutual benefits.
Designed with anti-magnetic interference and tamper-proof features for enhanced security and theft prevention.
Table 1
No. | Description | Specifications |
1 | Conditions of Use | Ambient Temperature: -20 °C ~ +60 °C; Medium Temperature: -30 °C ~ +80 °C; Relative Humidity: 5% ~ 95%; Atmospheric Pressure: 86 kPa ~ 106 kPa. |
2 | Standard Conditions | P=101.325 kPa, T=293.15 K (20 °C) |
3 | Accuracy Class | 0.5 |
4 | Explosion-proof Rating | Ex ib IIB T4 Gb |
5 | Protection Rating | IP65 |
6 | Electrical Performance Specifications | Power Supply Methods
Input Signal
Note: All input signals are correctly connected internally within the flow meter. Users should not disconnect or reconnect any wiring. Output Signals Pulse signal; 4 mA~20 mA current loop standard current, available in three-wire or two-wire system, with three-wire as the default configuration; battery under-voltage alarm signal(BL/Vout); upper and lower limit alarm signals(UP, LP). RS485 Communication Communication rates:4800bps,9600bps,19200bps,38400bps,57600bps; Communication mode: half-duplex, 8 data bits, 1 stop bit, no parity; supports MODBUS communication protocol in RTU mode. Wireless Remote Transmission Supports NB-IoT and 4G full-network compatibility. |
When ordering this product, the appropriate model should be selected based on the pipe nominal diameter, nominal pressure, flow range, maximum medium pressure, medium temperature range, and environmental conditions.
