9.10
The tester must produce smoke continuously for a period of one to four minutes, the actual time being dependent
on the length of that particular line and the number of accumulators installed connected to it.
9.11
It is essential that the smoke flow be continuous and not a series of isolated puffs as the detector will consider the
clear spaces between the smoke as a return to normal, non-smoke condition.
9.12
If the smoke testing team has difficulty with their initial attempts, a continuous delta voltage reading should be
made at the line module test points in the manner described in the preceding section on sensitivity adjustment.
9.13
As smoke is introduced into the module, the delta voltage should decline.
9.14
If the voltage appears to modulate (decline and increase), it indicates smoke is not being introduced continuously
into the accumulator. If no voltage decline is observed, it indicates:
a.
There are serious discontinuities in the pipework.
b.
There are blockages in the pipework.
c.
The pipework does not run to the module being tested.
9.15
The smoke test procedure is performed by two persons:
a.
One man operates the smoke tester and applies smoke to each accumulator installed in the vessel.
b.
The second man, stationed at the detector cabinet, observes the system alarming, resets it, and records the
specific accumulator causing a specific detector module to alarm.
9.16
The notes by the team member at the cabinet are used to provide an accurate layout of the accumulators, CO2
pipework and their connections to the detector modules.
9.17
It is necessary that each and every accumulator be tested in this manner to insure accumulators are all connected
to the pipework and none are blocked.
9.18
The detection cabinet is always operated at maximum sensitivity (as shipped), provided the delta voltage is at the
approximate level noted under the section on sensitivity adjustment.
9-2
