Service Manual

 

AX300-I

 

 

 

 

 

 

 

 

 

concentration of O2 is in

 

 

excess of 40%, calibration

 

 

with 100% is recommended.

 

 

C) If humidified gas is used to

 

 

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 AX300-I unit is

A) Disconnect the batteries and

working and the LCD is

equipped with an

inspect the contacts for

displaying

electronic "watch dog,"

corrosion. Reconnect the

alphanumeric figures.

which analyzers the

batteries. If the unit functions

 

circuitry within the unit

properly, calibrate the unit

 

for potential faults and

and reset the alarm values.

 

renders the unit

B) Try a new set of batteries.

 

inoperable until the

 

 

 

 

condition is corrected.

C) Increase the distance

 

(See Watch dog

between the unit and any

 

section below)

source of radio frequency

 

Several conditions can

interference. The sensor

 

cable is a prime source of

 

activate the "watch

 

pickup as it can act like an

 

dog." Dropping the

 

antenna. Relocate the

 

unit, poor battery

 

sensor cable and if possible

 

connections, and radio

 

change its coiled length to

 

frequency interference

 

“de-tune” its antenna effect.

 

are the most common

 

Placing the cable in a

 

causes. See the watch

 

different position may also

 

dog section for

 

help.

 

additional information

 

 

 

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

 

 

Cannot adjust

Critical settings require

A) If display is not flashing

calibration

two keys be pressed in

press lock key once to

 

a specific order.

activate keys. Press desired

 

LOCK/UNLOCK key is

function followed by the Up

 

and Down key.

 

active

 

 

 

Teledyne Analytical Instruments

38

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Teledyne AX300-I manual Concentration of O2 is