Teledyne MD300 - Oxygen analyzer and monitor (Diving) - Manual (Page 35)

Portable Oxygen Monitor Service Manual
Teledyne Analytical Instruments 35
Table 3-2 Error Codes
Error Code Audio Beeps Error
Indeterminate 2 The watchdog timer has timed out indicating a
serious software error
30 3 Analog output is different from the expected value.
May indicate a shorted or over-loaded analog
output or a failure of the analog to digital converter
or digital to analog converter circuit.
50 5 The ADC circuit failed during POST.
6 (5) 6
(There is no
indication of
which key is
stuck)
A stuck key has been detected. The second digit,
in this example (5), on the display shows which
key is stuck:
0 - Low Alarm
1 - Batt
2 - Cal
3 - Up
4 - Down
5 - Silence
6 - High Alarm
7 - Alarm Test
8 - Key Lock
7(2) 7
(There is no
indication of
the type of
DAC failure)
A failure has occurred during the automatic
calibration of the digital to analog converter (DAC)
circuit. The second digit, in this example (2),
shows the type of digital to analog failure.
0 - Measurement
1 - High Test
2 - Low Test
3 - Offset Cal
4 - Gain Cal