ENOTEC OXITEC 5000 Oxygen Analyzer Maintenance Guide

Common faults and troubleshooting

If the O ₂ display fluctuates greatly, it may be caused by intermittent wiring, poor mV connection inside the probe, damaged filters, incorrect installation of V-shaped covers, or lack of filter heads. If the display shows full range or higher than expected, the probe and sensor flange sealing, flange welding, and bolt fastening should be checked. If the local display is correct but the output is incorrect, check the range setting and mA output terminal. If O ₂ displays 0%, possible reasons may include heater failure, thermocouple failure, damaged heating fuse, cable short circuit, transformer failure, poor mV contact, influence of combustible components, or damaged measuring cell.

Common error messages include: hardware errors 1-7, thermocouple open circuit, probe set temperature not reached, temperature too low, temperature too high, O ₂ sensor open circuit, calibration failure, test gas flow too low/too high, offset too low/too high, slope too low/too high, unstable signal, abnormal process pressure mA input, and REMOTE module error. The alarm information includes low/high reference air flow, O ₂ limit alarm 1/2, low/high electronic unit temperature, and low clock battery. When an error that cannot be handled occurs, service personnel should be contacted.

Technical Data Summary

The electronic unit displays a 240 × 64 dot matrix and supports 2 configurable O ₂ ranges, with an accuracy better than 0.5% or 0.02 Vol% O ₂ of the measured value. The power supply is 230 V AC or 115 V AC, 50/60 Hz. The power consumption during the heating stage is about 400 VA, and the measurement mode is about 200 VA. The output signal is active 0/4-20 mA, with a maximum load of 500 Ω. The standard on-site shell size is approximately 300 × 440 × 240 mm, with a weight of approximately 19 kg. The probe measurement principle is zirconia, with a process pressure of ± 50 mbar, a flow rate of 0-10 m/s, a reaction time of less than 1 s, a T90 of less than 5 s, and a probe material of SS316.