Teledyne TED-200 - Medical application oxygen monitor - Manual (Page 25)

Maintenance and Troubleshooting 3
3-5 Teledyne Analytical Instruments
Symptom
Alarm sounds/flashes con-
tinually, but keys are func-
tioning normally.
No display.
Unit reads 00 and alarms
sound/flash continually.
Reading drifts over 2–3%
over a period of 3–4 hours.
No response when pushing
a front touch panel button.
All other functions appear
normal.
What to Do
A) Reset alarm levels.
B) Remove excess conden-
sate, recalibrate, or replace
sensor.
A) Check/replace batteries.
B) Check battery connections.
C) Calibrate.
A) Check and reconnect, then
calibrate.
B) Replace cable or sensor
(depending upon location of
bad connection).
A) Replace cable.
B) Replace sensor.
Why
A) Reading outside alarm lim-
its.
B) Sensor output low, activat-
ing internal safety system.
A) Batteries expired.
B) Bad battery connection.
C) Unit not calibrated after the
batteries were reconnected.
A) Sensor not plugged in.
B) Sensor cable not plugged in
or bad connection.
A) Intermittent cable connec-
tion.
B) Intermittent sensor connec-
tion.
Some TED 200-T keypads
require two successive
strokes within a 5-second
period for activation. See
Chapter 1.0: Introduction or
Chapter 2.0: Set-Up.
NOTE: In the event that none of these procedures produce desired results,
remove the batteries and return the unit to Teledyne for repair.