User's Manual

Routine Maintenance & Cleaning
75
DRAINING WATER FROM WATER TRAP
To drain water from the water trap simply screw the brass
drain fully clockwise.
When the water has drained, screw the brass drain fully
counter clockwise to seal water trap.
NOTE: The drain only needs to be finger tight. Do not
over tighten as this may deform the rubber seal. Always
conduct a Leak Test after draining the water trap to
ensure an air leak has not been introduced into the gas
sampling chain which will cause false readings. See
‘System Checks’ in ‘Gas Analyzer’ Menu.
The sample probe tip can be replaced as a separate item, or may be removed for
cleaning. Assembly will require a small quantity of “Loctite 222”, or similar thread
sealant, to be used on the threads to ensure a good gas seal.
At the start of each day, clean any accumulated deposits from the Sample Probe tip,
making sure that the two cross-drillings in the tip are clear and check that the analyzer
outlet pipes are not kinked or blocked in any manner.
Ensure that the analyzer is not operated in a dusty environment, especially areas
where paint spray and dust spray are present.
CAUTION: Contamination of the analyzer by paint spray or excessive dust may
void the warranty and/or service agreements!
Oxygen cell replacement procedure
When an exhausted oxygen cell is identified during a zero calibration, the handset
automatically links to ‘System Checks/O
2
Cell Functions’. Select ‘Oxygen Cell Value’
to ensure that the O
2
cell output is outside of the expected level of between 9mV and
11mV. If the cell has failed, change the cell as detailed:
1. Firstly ensure there are no leaks or blockages in the gas handling system. If a
blockage is found, clear and retest ‘Zero Calibration’, else proceed to 2.
2. Ensure power to the unit is switched off, then go to the rear of the unit and locate
the O
2
/NOx cells cover (see ‘Assembling the OmiScan Gas Analyzer’, page 8).
3. Remove the two retaining screws and remove the cover.
OM1399