Installation, operation, safety and technical data for the CS Instruments VA 550 / VA 570 flow sensor.
The CS Instruments VA 550 and VA 570 are thermal mass flow sensors for measuring gas flow and temperature. This manual provides the required safety instructions, installation steps, wiring diagrams, and configuration procedures for both the standard and ATEX versions.
It also contains the full technical specifications, including measurement ranges, power requirements, output options, and display details, as well as revision history and supplementary documents for earlier versions. This manual is written in Chinese.
| Measurement principle | Thermal mass flow sensor |
|---|---|
| Operating temperature (standard) | -40 °C to 180 °C |
| Operating temperature (ATEX version) | -40 °C to 120 °C |
| Power supply | 12‑36 V DC |
| Communication interface | Modbus RTU (EIA/TIA‑485) |
| Display | 2" TFT colour display (320 × 240) |
Installation and commissioning must be performed by qualified personnel who read the manual beforehand and follow all safety instructions, including proper grounding and staying within the limits shown on the nameplate.
The sensor provides two isolated 4‑20 mA outputs that can be individually adjusted in the "Channel" menu; set Auto to off to define scaling manually.