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RE46C180
DS22275A-page 28
?2011 Microchip Technology Inc.
4.5
Sensitivity Verification
After all sensitivity levels and CHAMBER voltage at
PTT/Chamber Test have been entered and stored into
the memory, additional Test modes are available to ver-
ify if the sensitivities are functioning as expected.
Table 4-8 describes several verification tests.
TABLE 4-8:
SENSITIVITY VERIFICATION DESCRIPTION
Sensitivity
Test Description
Standby Sensitivity    Clock T2 to Mode TM12 (12 clocks). With appropriate smoke level in the chamber, pull TEST
to V
SS
 and hold for at least 1 ms. The TESTOUT output will indicate the detection status
(High = smoke detected).
Hysteresis
Clock T2 to Mode TM13 (13 clocks). Pulse TEST and monitor TESTOUT.
HUSH Sensitivity
Clock T2 to Mode TM14 (14 clocks). Pulse TEST and monitor TESTOUT.
CHAMBER voltage at
PTT/Chamber Test
Clock T2 to Mode TM15 (15 clocks). Pulse TEST and monitor TESTOUT.
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