Teledyne 3010TB - Split architecture trace oxygen analyzer - Manual (Page 79)

Oxygen Analyzer Part II: Analysis Unit
Part II: 4-3 Teledyne Analytical Instruments
Table 4-1: Self Test Failure Codes
Power
0 OK
1 5 V Failure
2 15 V Failure
3 Both Failed
Analog
0 OK
1 DAC A (0–1 V Concentration)
2 DAC B (0–1 V Range ID)
3 Both Failed
Preamp
0 OK
1 Zero too high
2 Amplifier output doesn't match test input
3 Both Failed
The results screen alternates for a time with:
Press Any Key
To Continue...
Then the analyzer returns to the initial System screen.
4.5 Cell Failure Checks
Cell failure is covered in detail in Part I: Control Units, section 4.4.1.3,
Cell Failure. Cell replacement is covered Part II: Analysis Units chapter 5,
Maintenance.
Cell failure in the 3010T is usually associated with inability to zero the
instrument down to a satisfactorily below 5PPM reading. When this occurs,
the 3010 system alarm trips, and the VFD displays a failure message.
#.# ppm Anlz
CELL FAIL/ ZERO HIGH
Before replacing the cell:
a. Check your span gas to make sure it is within specifications.
b. Check for leaks downstream from the cell, where oxygen may be
leaking into the system.