Teledyne 2020 - Explosion proof thermal conductivity analyzer - Manual (Page 67)

Thermal Conductivity Analyzer Maintenance 5
5-1 Teledyne Analytical Instruments
Maintenance
5.1 Routine Maintenance
Aside from normal cleaning and checking for leaks at the gas connec-
tions, routine maintenance is limited to replacing fuses, and recalibration.
For recalibration, see Section 4.4 Calibration.
WARNING: SEE WARNINGS ON THE TITLE PAGE OF THIS
MANUAL.
5.2 System Self Diagnostic Test
Use UP/DOWN key to enter the SELF-TESY function.
The following failure codes apply:
Table 5-1: 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