HS 55 (Batch Mode)
Maintenance and care
39
6.3
Cleaning the cell and the cell windows
Clean the cell and the cell windows when the measured lamp energy, i.e., the number of
counts, drops. In devices with a Zeeman furnace, contamination can be detected by an
increase in the PMT voltage.
WARNING
Risk of chemical burns due to hydrofluoric acid
Hydrofluoric acid is highly corrosive and toxic. Danger to life due to swallowing, skin
contact or inhalation.
¡
The operator must wear a rubber apron, gloves and a face mask when handling hy-
drofluoric acid. Work under an extractor.
¡
Observe all instructions and specifications in the safety data sheet.
WARNING
Risk of oxyhydrogen formation
The cell must be sealed gastight for the hydride system as otherwise an oxyhydrogen
mixture which could explode at high temperatures would form in the cell.
¡
Inspect the polished end faces of the cell.
¡
Even if you notice only minor damage, replace the cell.
CAUTION
Risk of burns
The cell is very hot directly after operation: 600 to 950 °C (metal hydrides) and 150 °C
(mercury).
¡
Allow the cell unit to cool down before maintenance.
¡
Check the current cell temperature in the Hydride syst. window on the Control tab.
NOTICE
Risk of damaging the quartz windows due to sweat from hands and ultrasound
Fingerprints can burn into the surface of the quartz windows, reducing visibility.
¡
Do not touch the fronts of the quartz windows with your fingers. Wipe off any fin-
gerprints immediately with ethanol.
¡
Do not clean the quartz windows in an ultrasonic bath. This may lower the UV per-
meability of the windows.
Cleaning the cell windows
}
After the cell unit has cooled down: press the blade spring together and remove the
cell windows with the frames.
}
Clean the cell windows with diluted hydrochloric acid.
