Teledyne AX300-I manual Troubleshooting

Service Manual AX300-I

3.6.5.2CARE AFTER USE IN NITROUS OXIDE

CAUTION: THE R17MED SENSOR SHOULD NOT BE LEFT IN NITROUS OXIDE MIXTURES ANY LONGER THAN ABSOLUTELY NECESSARY.

After exposure to nitrous oxide mixtures, the sensor should be left in 100% oxygen overnight (e.g., left in a breathing circuit that has been flushed with pure oxygen). If this is not practical, when using the tee, remove the plastic flow diverter and leave the sensor in room air. If the oxygen reading continues to drop after each use in nitrous oxide the sensor should be removed from service. If the sensor can no longer be calibrated or if there is any sign of electrolyte leakage, the sensor should be disposed of in accordance with local regulations and the Material Safety Data Sheet (MSDS).

Note: The MSDS on this material is available upon request through the Teledyne Environmental, Health and Safety Coordinator. Contact at (626) 934-1592

3.7 Troubleshooting

The AX300-I oxygen analyzer provides a variety of built-in safety features that prevent its use when a fault is detected. When a unit displays the message √ SENSOR and sounds the audible and visual alarm continuously, it is an indication of a faulty connection between the sensor and the unit or an expired or faulty sensor. To determine where the difficulty lies, refer to the following guidelines in Table 3-2.

Table 3-2 Troubleshooting

Symptom	Why	What To Do
New sensor responds	If the sensor is new	A) Wait 1–2 hours and
slow or drifts.	and was just	recalibrate.
	removed from its
	sealed bag it may
	need to run for
	several hours.
Sensor will not read	Calibration in 100%	A) Recalibrate using dry gas
below 22 % after	was invalid or the	making sure the reading
calibration in 100% O2.	room air is	stabilizes before making
	contaminated with	any adjustments.
	excess oxygen.	B) Make sure that at least 6" (30
		cm.) of tubing is attached to
		the exhaust side of the tee

Teledyne Analytical Instruments 36