RE46C180S16F Datasheet, PDF(28/58 Page) Microchip Technology – CMOS Programmable Ionization Smoke Detector ASIC with Interconnect, Timer Mode and Alarm Memory

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RE46C180S16F Datasheet, PDF (28/58 Pages) Microchip Technology – CMOS Programmable Ionization Smoke Detector ASIC with Interconnect, Timer Mode and Alarm Memory

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RE46C180

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 VSS 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 Clock T2 to Mode TM15 (15 clocks). Pulse TEST and monitor TESTOUT.

PTT/Chamber Test

DS22275A-page 28

ï£ 2011 Microchip Technology Inc.

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