WMA-5 Operation Manual V. 1.01 68 support@ppsystems.com
Maintenance
The WMA-5 requires minimal maintenance and access to internal components should not be required
with the exception of the internal hydrophobic filter which does require periodic replacement (See
Hydrophobic Filter on page 70). To access internal IRGA components, remove the 4 screws in each
corner of the main front panel and gently pull off.
Absorber Column and CO
2
Scrubber
Periodically inspect the condition of the following items:
Soda Lime
• The soda lime should last for 2-3 months from the time it is replaced. PP Systems used to supply
a “green to brown” indicating soda lime but this type is no longer available and has since been
replaced by the “white to violet” indicating soda lime. For most applications running at low CO2
concentrations (i.e. less than 2000 ppm) the indicator is not very strong and you may not see any
obvious change in color. So the rule of thumb should be to pay attention to the CO
2
absorber
reset (see Reset Zero Absorber on page 27) function or simply change out the soda lime once
every month if you have any questions about its freshness.
Soda Lime cannot be regenerated and should be discarded after exhaustion.
• Type: Sofnolime, 1.0-2.5 mm, self-indicating (white to violet), 1 kg
• Manufacturer: Molecular Products. (www.molecularproducts.com
)
• For the latest Material Safety Data Sheet, please visit www.molecularproducts.com and
request the latest MSDS or contact PP Systems.
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