The SMARC Intelligent Volume Corrector (EVC) is a crucial component within gas measurement systems, designed to provide highly accurate and reliable gas volume data.

Generally, an Electronic Volume Corrector (EVC) acts as the central 'cash register' in the gas value chain, ensuring that the measured gas volume under operating conditions is accurately converted to a standard volume for official billing and custody transfer purposes.

The Core Concept of Volume Correction

Gas volume varies significantly with changes in temperature and pressure. Gas measured under operating conditions (e.g., in the field) has a different volume compared to the same amount of gas under reference or standard conditions (20oC and 101.325 kPa).

The SMARC EVC measures the gas parameters directly in the field:

1. Temperature (T)
2. Pressure (P)

It then automatically performs calculations and corrections using the compressibility factor (Z) to convert the measured gas volume (volume in operating conditions) into Standard Volume (volume in reference conditions). This correction is commonly referred to as PTZ correction (Pressure, Temperature, Z-factor).

As a product that integrates with Alide's G Series Rotary Gas Flowmeters, the SMARC EVC highlights the following features:

• Intelligent Integrated Design: Adopting a smart integrated design, the SMARC EVC can dynamically test gas temperature and pressure to perform automatic compensation.
• Dual Measurement Display: Capable of displaying both the standard instantaneous volume flow rate and the total standard volume of the gas.
• High Accuracy: Utilizes a low-power microprocessor and imported high-precision digital temperature and pressure sensors, ensuring superior measurement accuracy.
• Compressibility Factor: Accurately corrects the compressibility factor (Z-factor), which is essential for high accuracy in gas transactions.
• Low Power Consumption: Designed for efficient power consumption (average less than $1 \text{ mW}$ on battery power), allowing for a long battery life (can exceed 5 years) for stable operation.
• Advanced Communication: Equipped with communication features like RS485 (optional: $4-20 \text{ mA}$ output or alarm) for easy data transmission to SCADA systems or meter data management systems.
• Durable and Safe: Features an IP65 protection rating and explosion-proof options (e.g., ExiaIICT4 Ga), making it reliable for challenging industrial environments.

Primary Applications:
The SMARC EVC is a vital element for:

• Commercial and Industrial Gas Billing: Ensuring fair and accurate billing between gas utility providers and customers.
• Custody Transfer Measurement: Required at gas delivery points where ownership and responsibility are transferred (e.g., from transmission to distribution).
• System Integration: Widely compatible with Turbine and Rotary Flow Meters and other instruments.