Testing Detectors Without Detector Exchanger And Tester/Detector Tester - Siemens FDOOT221 Technical Manual

7.3.2 Testing detectors without detector exchanger and
Building Technologies
Fire Safety
tester/detector tester
The fire detectors are highly resistant to deceptive phenomena. This means that
optical fire detectors, for example, will recognize the immediate occurrence of
smoke (such as that which occurs during testing with test gas) as a deceptive
phenomenon and will not trigger an alarm. This is desirable in normal operation;
however, it does make testing with test gas problematical.
To enable detector testing with test gas or hot air, the detector must be switched to
test mode. Testing with test gas or hot air is performed differently on addressed
detector lines and collective detector lines.
FDnet, SIGMALOOP, interactive detector lines
The detector is set to test mode when the detector or the detector group is
switched to 'Test' on the control panel. The detector can be tested with test gas or
hot air.
If a FDOOT241-A4 point detector is operated under SIGMALOOP in sensor mode
'0', it cannot be activated with hot air.
Collective detector lines
On a collective detector line, the detector is not set to test mode if the detector
group is switched to 'Test' on the control panel.
Detectors on a collective detector line are switched to test mode for 3 minutes in
the following cases:
● Starting up and resetting the detector line.
● Inserting the detector.
● Removing the detector from the detector line and re-inserting it.
To trigger a detector using test gas, normally 2...4 gas discharges at intervals of
approx. 2 seconds are required. When the detector is in test mode, activation
takes place after approximately 10 seconds.
MS8/PMT and AnalogPLUS detector lines
On an MS8/PMT or AnalogPLUS detector line, the detector is not set to test mode
if the detector or the detector group is switched to 'Test' on the control panel.
Unlike on a collective detector line, the detector must not be removed from the
detector line for a short time and re-inserted. Testing without a detector exchanger
and tester is therefore difficult, especially with smoke detectors.
In AnalogPLUS mode, you can use the detector exchanger and tester to select
parameter set 12, which has a short response time.
6BMaintenance / Repair
53BTesting detectors
117 | 138
007004_t_en_--
2015-11-04
7