5-7
The 4098 Ionization Detectors may be tested with a magnet to verify proper operation of the
Fire Alarm Control Panel.
Note: When ionization detectors alarm, the red LED indicator activates and latches into the
ON position.
Place a magnet against the detector’s side (over the location marked by a “” on the head of the
ionization detector) and hold for ten seconds to activate an internal reed switch. Use the Magnet
Tester (Part No. 553-810).
Plug the 553-832 Ion Detector Test Cable into the Detector’s sensitivity voltage pins located on
the Ion Detector Head. Perform the following steps to test the Ion detector’s sensitivity:
1. Connect a 10M/V digital voltmeter to the 553-832 test cable, connect the negative terminal of
the voltmeter to the red wire of the test cable and connect the positive terminal of the
voltmeter to the white wire of the test cable. The black wire of the 553-832 test cable is not
used.
2. The voltage measured by the voltmeter should be within 0.2 and 0.8 volts. Detectors
outputting a voltage outside this range should be cleaned or replaced.
3. If the Ion Detector voltage output is outside of the range, it should be removed and cleaned as
described in the cleaning section. Re-check the voltage measurement on the Ion Detector; if
the Ion Detector is still outside the voltage range after cleaning, replace the device.
Maintenance and Testing,
Continued
Magnetic Test for
Ionization Detectors
Ion Detector
Sensitivity Test
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