Teledyne 3010TA, Руководство по эксплуатации, Страница: 83 / 101

Oxygen Analyzer Part II: Analysis Unit
Part II: 4-3
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 low ppm 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.
If there are no leaks and the span gas is OK, replace the cell as de-
scribed in Part II: Analysis Units chapter 5, Maintenance.