6-22
Model 3090/3090AK Engine Exhaust Particle Sizer
TM
Spectrometer
Pump Filters
To replace the pump filters, proceed as follows:
1. Locate the blue pump filters; refer to Figure 6-23.
2. Select one filter for removal and mark both ends of the tubing so you
can install the new filter with flow in the proper direction. Note the
orientation of the filters and direction of flow indicated on the filters.
3. Remove one filter at a time. Be careful when pulling the tubing from the
filter end ports. Tubing may be very sticky and require twisting and
flexing to facilitate removal.
4. Install the new filter in the correct orientation and insert the correct
tubing.
5. Repeat steps 3 and 4, installing the other filters, one by one.
Figure 6-23
Replacing Filters
6. When all filters have been replaced, replace the instrument covers.
