Honeywell IQ Force, Справочное руководство

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IQ Force™ Dock Reference Manual 14
Connecting the Calibration Gas Cylinder to the Dock(s)
2.7.3 Fresh Air Port Instructions
The Fresh Air Port is used to draw the fresh air sample into the dock for
instrument processing. Check valves and/or fresh air filters are required
depending on how fresh air is delivered to the dock. See the chart below
for specific requirements for your setup.
Table 2. Air filter/check valve requirements chart
Air Filter at
Dock
Check
Valve(s)
Single dock in fresh air Yes N/A
Multiple docks in fresh air Yes N/A
Single dock with zero air cylinder No No
Multiple docks with zero air cylinder No Yes
Single dock with sealed fresh air
conduit
Yes No
Multiple docks with sealed fresh-
air conduit
Yes Yes
The fresh air filter is placed on the Air Port at the dock to protect the dock
from contaminants. Check valves are used to ensure the purity of external
fresh air sources when more than one dock is used.
2.7.3.1 Fresh Air Filter
Under normal circumstances, the IQ Force dock is located in a fresh air
environment and fresh air is drawn in from the local environment. A filter is
included with the dock that is used to protect the dock from contaminants
that may inadvertently enter the dock. The air filter should be installed if the
dock is drawing fresh air from the immediate surroundings or if it is drawing
fresh air from an external source via a sealed conduit. The fresh air filter
can be left off if the fresh air source is a calibration cylinder.
Only one side of the filter will screw into the Air Port on the dock.
2.7.3.2 Providing Fresh Air in a Contaminated Environ-
ment
If the IQ Force is to be located in a potentially contaminated environment,
fresh air must be delivered to the Air Port on the dock for use during
instrument processing. This can be accomplished either by using a cylinder
of “zero air” with a demand flow regulator (option 1 below) or by plumbing
fresh air into the dock in a sealed conduit from an outside location that has
known fresh air (option 2 below).