Key facts
- Brand
- YOKOGAWA
- Model
- ZR402G
- Documents
- 2
- Languages
- EN · JA
- Last added
- 2012-01-05
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Yokogawa ZR22G/ZR402G/ZR202G Direct In Situ Zirconia Oxygen and High Temperature Humidity Analyzer User Manual
The manual describes Yokogawa's direct‑in‑situ zirconia oxygen analyzers and high‑temperature humidity analyzers, available in separate and integrated configurations. It covers system components, installation, calibration, operation, and maintenance procedures.
Key features include a digital LCD touchscreen, HART digital communication, remote maintenance, replaceable probe heater, and multiple reference‑air supply options. The document provides detailed specifications, wiring guidelines, and safety standards for reliable use in boilers, furnaces, and drying equipment.
YOKOGAWA ZR402G specifications
| Measurement Range | 0 to 100 vol% O |
|---|---|
| Output Signal | 4 to 20 mA DC (max load 550 Ω) |
| Warm‑up Time | Approx. 20 min |
| Response Time | 90 % within 5 s |
| Sample Gas Temperature (probe only) | 0 to 700 °C |
| Sample Gas Temperature (with high‑temp probe) | 700 to 1400 °C |
| Probe Length Options | 0.15 m to 5.4 m |
| Ambient Temperature Range | -20 °C to +150 °C |
| Power Supply Voltage | 100 V to 240 V AC (85 V to 264 V acceptable) |
| Power Consumption | Max 300 W (≈100 W typical) |
| Maximum Probe‑to‑Converter Distance | ≤300 m (conductor resistance ≤100 Ω) |
All YOKOGAWA ZR402G documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
How long does the analyzer take to warm up?
The warm‑up time is approximately 20 minutes.
What is the maximum distance allowed between the probe and the converter?
The conductor resistance must be 100 Ω or less, which corresponds to up to 300 m when using a 1.25 mm² cable.
Can the detector be replaced without shutting down the system?
Yes, the manual states that hot‑swap of the detector is possible by powering off the channel and replacing the detector.
How are error messages displayed to the user?
Error numbers and their descriptions are shown on the LCD screen, allowing operation without a separate instruction manual.