ZR202G/ZR402G/AV550G are zirconia oxygen concentration meter/high temperature humidity meter for energy saving and environmental protection. It can reduce wiring, piping and installation costs, light switch operation without opening the cover, and environmental friendly field replaceable, field replacement of zirconia sensors and heater assemblies. One machine can select oxygen concentration meter or high temperature humidity meter.
The manual describes the operation principle of the zirconia‑type oxygen sensor, its high‑temperature humidity measurement functions, and the user interface with a 5.7‑inch colour LCD touch panel. It covers installation, wiring, calibration, hot‑swap detector replacement, and self‑diagnosis features.
Technical specifications, error codes, and application examples for boiler, furnace and other industrial combustion equipment are provided, along with wiring diagrams and connection options for up to eight detectors. This manual is written in Japanese.
| Model name | AV550G |
|---|---|
| Supported detectors | ZR22G, ZO21D, ZO21DW |
| Display | 5.7‑inch colour LCD touch panel, 320×240 dots |
| Analog output | 4–20 mA DC (max load 5.58 kΩ) |
| Power supply | 100–240 VAC, 50/60 Hz |
Yes, the manual states that hot‑swap of the detector is possible by powering off the channel and replacing the detector.
Error numbers and their descriptions are shown on the LCD screen, allowing operation without a separate instruction manual.
It provides a 4–20 mA DC analog output (maximum load resistance 5.58 kΩ).