Ion Science MVI - Manual (Page 19)

MVI MANUAL Ion Science Ltd
Page 19 of 23
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User maintenance
Filter Replacement
Charcoal (Zero) Filter
It is advised that you replace the carbon filter after exposure to
contaminants as it will become saturated with use.
To check the condition of the filter, use the following procedure:
a) Turn the instrument ON and ensure that the
LO BAT indicator does not appear.
b)
Allow the instrument to warm up for 10 minutes.
Zero the instrument in fresh air.
c)
Connect the charcoal filter to the MVI. The
reading should not increase by more than
4 µg. If the reading increases by more than
4 µg then the filter must be replaced.
Always replace end caps to maximise life of filter.
PTFE Probe and Filter Assembly
The MVI is supplied with a PTFE probe and luer filter. This can
become contaminated or loaded with dust in regular use.
Typical symptoms of contamination are a sluggish response to
Mercury and an unstable zero. If either of these symptoms
occurs then the filter must be replaced.
Replacing the filter:
a)
Unlock the luer filter and discard
b) Replace with a new filter