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6 Maintenance
Procedures
Introduction This chapter provides routine maintenance instructions for the
ApexPortable.
The maintenance procedures described in this chapter are not required
on regular or prescribed intervals and should be performed only if the
user has reason to question the data they are receiving.
Safety Before performing any of the maintenance tasks described in this
chapter, read Chapter 1 of this manual and become familiar with the
warnings and caution labels.
Maintenance Calibration
To maintain optimum performance of this instrument, it should be
recalibrated annually by a Lighthouse Authorized Service Provider.
Zero Count
Test
This section provides the user with the particle counter zero count test
procedure. A purge filter must be attached to the instrument and four
(4) five (5) minute samples must be taken. There shall be no more than
1 count during the four sample runs.
1. Start with the instrument OFF.
2. Connect the Purge filter to the sample inlet.
3. Apply power to the instrument.
4. Configure the unit to sample for 30 minutes.
5. Run a 30-minute sample period. This time allows the unit to
warm up and purge any residual particles that might be inside it.
6. Configure the unit to sample for 5 minutes with a 10-second hold.
7. Set Cycles to 4 so the instrument will take 4 5-minute samples.
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