Teledyne MX300-I manual Ventilate the patient, water

Portable Oxygen Monitor Service Manual

Symptom	Why	What To Do
		ventilate the patient, water
		vapor actually dilutes the
		gas. See Appendix:
		Humidity, Temperature.
		D) If a blender is used, check
		its calibration. See
		Appendix: Discrepancy in
		Readings.
The unit has stopped	The MX300-I	A) Disconnect the batteries and
working and the LCD is	instruments are	inspect the contacts for
displaying	equipped with an	corrosion. Reconnect the
alphanumeric figures.	electronic "watch dog,"	batteries. If the unit functions
	which monitors the	properly, calibrate the unit
	circuitry within the unit	and reset the alarm values.
	for potential faults and	B) Try a new set of batteries.
	renders the unit
	inoperable until the	C) Increase the distance
	condition is corrected.	between the unit and any
	(See Watch dog	source of radio frequency
	section below)	interference. The sensor
	Several conditions	cable is a prime source of
		pickup as it can act like an
	can activate the
		antenna. Relocate the
	"watch dog."
		sensor cable and if possible
	Dropping the unit,
		change its coiled length to
	poor battery
		“de-tune” its antenna effect.
	connections, and
		Placing the cable in a
	radio frequency
		different position may also
	interference are the
		help.
	most common
	causes. See the
	watch dog section for
	additional information
Alarm sounds/flashes	A) Readings are	A) Adjust high and low alarm
continuously.	outside alarm	setting to be above and
	limits.	below O2 value being
		displayed.
No display.	A) Batteries expired.	A) Check/replace batteries.
	B) Bad battery	B) Check battery connections.
	connection.	C) Calibrate.
Keys inoperable/cannot	The LOCK/UNLOCK	A) Press LOCK/UNLOCK key
turn unit off	key is activated which	once. LCD will flash
	is preventing key	indicating keys are active.
	operation

Teledyne Analytical Instruments 39