153 Appendix D
Gravimetric Sample (optional for particulate calibration)
EVM Series User Manual
Gravimetric Sample (optional for particulate calibration)
1. What is the backpressure
capabilities? (inches/water
column)
>= 15 inches of water @ 1.67 L/min
2. What type of cassettes
can be installed?
Both 25-mm and 37-mm cassettes can be used in the EVM monitor.
3. How do you replace the
filters (which are supplied
in the kit)?
The cassettes are separated using a “larger”-sized screwdriver. The backing
should always remain in the cassette (white, thin cardboard-like circular disc)
and the filter is placed on top of the backing. An EVM-7 or EVM-3 is shipped
with 10-pack of replaceable filters. (Filters can be ordered in 5-packs via TSI,
see TSI contact section.)
4. Can we run the unit
without a cassette?
The monitor should not be run without a cassette. The monitor is installed with
a pump protection filter cassette. As its name indicates, it protects the pump
from particulate matter. This cassette or a new cassette (if performing a
gravimetric sample) should always be installed. It should be noted that the
pump protection filter cassette will periodically need to be cleaned or replaced.
5. Does TSI offer cassettes?
TSI offers a 5-pack of 37-mm gravimetric cassettes (for pump protection).
Order Part Number 074-076-5. TSI also offers a 10-pack, order Part Number
074-090; However, TSI does not offer any other filters for special testing.
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