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Troubleshooting and Service Teledyne API T803 CO2/O2 Analyzer Operation Manual
202
9. After reconnecting the power and pneumatic lines, flow check the instrument
as described in the Section 10.3.4.
Figure 11-7: Critical Flow Restrictor Assembly / Disassembly
11.7.2. DISK-ON-MODULE REPLACEMENT PROCEDURE
ATTENTION
COULD DAMAGE INSTRUMENT AND VOID WARRANTY
Servicing of circuit components requires electrostatic discharge
protection, i.e. ESD grounding straps, mats and containers. Failure
to use ESD protection when working with electronic assemblies will
void the instrument warranty. Refer to Section 13 for more
information on preventing ESD da
mage.
Replacing the Disk-on-Module (DOM) will cause loss of all DAS data; it may
also cause loss of some instrument configuration parameters unless the
replacement DOM carries the exact same firmware version. Whenever changing
the version of installed software, the memory must be reset. Failure to ensure that
memory is reset can cause the analyzer to malfunction, and invalidate
measurements. After the memory is reset, the A/D converter must be re-
calibrated, and all information collected in Step 1 below must be re-entered
before the instrument will function correctly. Also, zero and span calibration
should be performed.
1. Document all analyzer parameters that may have been changed, such as
range, auto-cal, analog output, serial port and other settings before replacing
the DOM
2. Turn off power to the instrument, fold down the rear panel by loosening the
mounting screws.
3. When looking at the electronic circuits from the back of the analyzer, locate
the Disk-on-Module in the right-most socket of the CPU board.
07276B DCN6418