I - 2
Appendix I
Testing ASD Devices
Since one of the parameters transmit-
ted to the detector adjusts the detec-
tion algorithm (R-algorithm) to reduce
false alarms, it is necessary to defeat
ASD (or at least the R-algorithm) when
smoke testing ASD devices. The Test
ASD_Devices menu option has been
supplied for this purpose. When ASD
devices are to be smoke tested, the
Test ASD_Devices option must be
enabled. This disables the application
specific detection R-algorithm so
the detector will alarm using the
standard test gas method. If the Test
ASD_Devices option is not enabled
prior to smoking the device, the tester
may find it extremely difficult to alarm
the detector since the algorithms are
designed not to be fooled by a decep-
tive phenomenon such as test gas.
Once the Test ASD_Devices option has
been enabled using the test menu, the
tester should wait 3 minutes before
attempting to test the ASD devices.
This time may vary slightly with the
number of ALDs and ASD detectors in
a system. This will ensure that the ASD
R-algorithm has been defeated for test
purposes. The system will not reset
until the Test ASD_Devices option has
been disabled.
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