Installation HiVol 3000 User manual 1.7
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Ensure the Trigger Signal to Trigger Ground voltage does not exceed 5V. To prevent
damage to the HiVol, opto-isolated or relay contacts are recommended to connect the
triggering device to the HiVol.
Refer to the cable diagram for further details.
Figure 8. External Trigger Output
2.3 Mounting/Siting
2.3.1 Siting
For guidance in the selection of sampling sites, the reader is referred to AS
2922-1987 or U.S. EPA Federal Register 40 CFR Part 58 Appendix E.
In general, a site is chosen to be representative of the location or the area type
being monitored.
The following guidelines are presented as a guide to the selection of a site which
should provide representative data.
1. The sampler should be located in an area with unrestricted ventilation.
The sampler inlet should be located well away from buildings, walls and
trees. An example of some Australian Standard minimum separator
requirements for obstacles are shown in Figure 9. As a general rule the
sampler should be at least 20 metres from buildings, walls and trees. The
sampler should be located at least twice as far from the obstacle as the
height of the obstacle. The sampler inlet should also have a minimum
clear sky angle above the inlet of 120°
2. Samplers should be located well away from local sources of pollution
(eg incinerators, stacks or ducts, boilers etc) unless those sources are
specifically under investigation.
3. Other siting considerations include good access, security, availability of
reliable power, safety, and noise if the sampler is to be located in
residential areas.
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