Maintenance
122 Agilent 55B AA Spectrometer User’s Guide
Gas supplies
Change gas cylinders according to the instructions supplied by the manufacturer.
Refer also to the Compressed gases and cylinders
and Hazards chapter at the start of this manual, see Page 14.
When any gas cylinder is changed, inspect all gas hoses. Replace any hoses
showing signs of damage or deterioration.
Test all connections for leaks using a commercial leak testing solution, a mild
detergent, or an electronic leak detector.
When changing gas cylinders:
1 Check all gas supply pipes and hoses for leaks.
2 Test the operation of all regulators.
3 Ensure that shut-off valves are functioning correctly.
Lamps
CAUTION
Care must be taken when handling lamps. Always hold the lamp by its base. Do
not touch the quartz window at the end of the lamp. Touching the glass envelope
will reduce the lamps’ efficiency.
To install a hollow cathode lamp:
1 Open the lamp compartment door.
2 Ensure that the required lamp position is turned off.
This is controlled from the Instrument Parameters page of the LCD display. To
turn the lamp off, set the ‘Active current’ field to zero (for more information,
see ‘Instrument Parameters page’, on Page 58).
3 Hold the lamp by its base and align the lamp base so that the ridge on the
guide pin (see Figure 84 below) is matched with the notch in the socket (see
Figure 85. Lamp socket – notch highlighted below).
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