Zeta Alarm Systems.
Classic 2000 Mk II Operation Manual
Revision 1.0
Part # MAN-Z3K-01
Page 48
obscuration percentage conversion for the photo and ion sensors and degrees Celsius to degrees
Fahrenheit conversion for the thermal (heat) sensor.
3.6.2 Sensitivity Adjustment
Alarm levels for the intelligent sensors may be manually set within the UL range. There are three
system-level programmable settings: High, Medium, or Low. Values associated with the High,
Medium and Low settings are user programmable within the UL approved range. Each sensor may
then be set to one of the three levels. Additionally, each sensor may be micro-adjusted using the
“offset” menu to adjust the sensitivity setting up or down 3 analog counts. Note: Ionization sensors
used in duct applications must be set to high sensitivity. See Section 4.2.4.2.
3.6.3 Day/Night Sensitivity Adjustment
The system can be programmed to automatically adjust the smoke sensors to a lower sensitivity
during times the location is normally occupied (“day”) and to return to a more sensitive setting
when a location is not occupied. For more information, see information on Day/Night Sensitivity
Control programming and operation in Section 5.
3.6.4 Alarm Test Level Measurement
The panel software periodically commands each sensor to simulate an alarm level reading from
the sensing chamber.
Please see Appendix I for a table converting the analog value reading to %/ft. obscuration based
on its position between the known clean air and test values. The accuracy of this measurement
method is sufficient to meet the NFPA 72 requirements as a calibrated smoke test instrument.
3.6.5 Automatic Test Operation
The control panel performs an automatic test of each sensor once every 24 hours. Failure to meet
the test limits causes a Service Alert trouble type. System Reset clears this trouble. Panels incor-
porating the ZNDC for event reporting will send a “Periodic Test Report” event to the Central Sta-
tion. See Section 6.1.6.
3.6.6 Maintenance Alert Operation
When the compensation reaches the limit of the amount of drift compensation that may safely be
applied, a special trouble condition is reported, per new NFPA standards.
3.6.7 Type Code Supervision
The control panel monitors hardware device type codes on a regular basis. Mismatch of type com-
pared to the program will cause a point trouble. Trouble label is DEVICE TYPE WRONG.
3.6.8 LED Control Operation
The panel includes a global program selection to prevent blink of sensor LEDs during normal con-
ditions. This is often desired in sleeping areas where the flashing light may be objectionable. As a
standard function, the control panel allows up to 5 LEDs per loop to latch on in alarm.
3.6.9 Alarm Verification Operation
The panel performs alarm verification on selected intelligent smoke sensors. Selection of sensors
for alarm verification is described in Section 5. The verification time is a global system program
selection of 0 to 60 seconds.
Summary of Contents for Classic 2000 MKII
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