4.2.4. Manual Zero Air Check
A zero air check can be carried out manually. To do this the TSP inlet needs to be removed and the
particle filter (supplied with the instrument) needs to be attached to the monitor. Ensure there is a
good seal around the inlet.
The filter will remove 99.99% of particulates from ambient air. Wait 5 minutes and then check the
readings on the control module. The reported value should be close to 0.0ug/m3.Record the particle
monitor reading in µg/m
-3
and the Volt (V) reading from the diagnostics in the maintenance report.
4.2.5. Filter Changes
There are two green filters which are located to the left of the sample filter holder.
They are designed to provide protection to the pump and optical window. The
filters will become dirty and must be replaced periodically.
To do this, unclip the filters from the connectors and replace. Ensure the filters
are connected the right way in accordance to the flow arrow. These filters can be
purchased from Aeroqual. Please contact technical support for a quotation.
Note: BQ filter – Sheath air filter (behind)
DQ filter – Sample air filter (in front)
4.2.6. Inlet Cleaning
The TSP inlet can be dismantled by unscrewing the 3 screws and separating the head into two parts.
Use a lint-free cloth wetted with isopropyl alcohol to clean both the inside and outside of the inlet.
4.2.7. Pump Module Removal
The pump module can be removed from the Dust Profiler by unscrewing the 4 screws on the base
plate and sliding the module out. Ensure the Dust Profiler is switched off when removing the module.
The sample, purge and exhaust lines need to be disconnected and all the connected cables removed.
The two main failures which would require removal of the pump module are:
1. A leak is discovered
2. The pump requires replacement
In both these cases the pump module will need to be sent back to the Aeroqual factory for repair.
Please contact technical support for assistance.
Screws
