Yokogawa OX400 — Unstable Reading

The former boiler-probe and purge checks did not describe this sampled-gas instrument. Record the sample-drawing option and observed fluctuations; a replacement troubleshooting sequence requires separate manual review.

Configuration scope

OX400 measures sampled gas using a zirconia sensor. Use the installed model code and sample-drawing option when choosing documentation.

Detailed fault isolation remains subject to separate technical review. This page does not authorize component replacement from a symptom alone.

OX400 model reference