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EVC type intelligent volume correction instrument
The EVC intelligent volume correction instrument adopts an intelligent integrated design, which can dynamically detect the temperature and pressure of
Product details
Performance characteristics
The use of microcomputer technology and high-performance microcontrollers, as well as carefully selected high-quality electronic components, make the entire machine more powerful and superior in performance.
The dual power micro power consumption technology adopted has low overall power consumption, and can operate for 5 years with long-term power supply from the internal battery or external power supply.
The internal embedded IoT communication module enables wireless data transmission through the built-in battery, making it easy to use. It can also be equipped with a dedicated DC power supply for real-time online data transmission.
External digital pressure sensors and digital temperature sensors have high detection accuracy and stability.
Based on the input frequency signal, it supports up to eight linear corrections and can improve the accuracy of measurement according to requirements.
4-20mA standard analog signal output, available in two-wire or three wire systems, supporting connection to DCS systems or secondary instruments.
Adopting RS485 interface and MODBUS protocol, a remote data acquisition and monitoring system can be formed through GPRS/CDMA and internet, facilitating centralized data acquisition and real-time management.
Adopting flash data storage technology, parameters can be saved for a long time after power failure. Equipped with dual layer protection of hardware watchdog and software watchdog to ensure data storage security; Clock battery design, automatic time calibration within the meter.
Internal battery low voltage alarm, reminding users to replace the battery in a timely manner.
Equipped with anti-theft functions such as anti magnetic attack, 3D anti tamper, and dynamic password, it will display an alarm code on the LCD screen and actively record and report any abnormalities.
● Independent battery compartment design, convenient for users to replace without affecting the use of the motherboard.
Multiple cable output terminals facilitate user signal acquisition, processing, measurement calibration, and power management.
Technical Parameter
1. Usage conditions
Environmental temperature: -25 ℃~+55 ℃
Medium temperature: -30 ℃~+60 ℃
Relative humidity: 5% to 95%
Atmospheric pressure: 70kPa~106kPa
2. Accuracy level: Level 0.5
Comprehensive indication error ≤± 0.5%
Pressure indication error ≤± 0.2%
Temperature indication error ≤± 0.1%
3. Pressure sensor
The upper limit of the sensor range Pmax is 0.5, 1.0, 2.0, 5.0, 10.0 (MPa absolute pressure).
4. Input signal
A. Flow pulse signal: high-frequency signal (0.2kHz, Vcc=3V), low-frequency signal (0.01m ³/0.1m ³/1m ³/10m ³, Vcc=3V).
B. Digital temperature signal: I ² C digital communication interface.
C. Digital pressure signal: I ² C digital communication interface.
A. Mechanical pulse signal: amplified and shaped by a preamplifier to output a flow pulse signal (for flow meter calibration).
B. Quantitative pulse signal: 0.1m ³, 1m ³, or 10m ³ corresponds to one pulse, with OC gate output (available for IC card controller).
C. Battery undervoltage alarm signal: usually high level, low level when battery undervoltage alarm occurs, OC gate output.
D. Low battery level valve closing signal: usually high level, low level during operation, OC gate output.
E. Flow/pressure alarm signal: When the instantaneous flow/pressure is lower or higher than the set value, it outputs a low level, usually a high level, used to monitor abnormal data.
External dimensions
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