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tests with the use of a standardized gas – test gas is supplied to inlet of the gas detector (or a pair
of coupled detectors), the message ‘tE’ should appear on the device display,
simulation of alarms for CO concentration (for Teta EcoWent detectors) or NO
2
(Teta EcoN
detectors), the message ‘S1’ should appear on the display,
simulation of alarms for LPG concentration (for Teta MiniDet detectors), the ‘S2’ message should
appear on the device display,
test of safety functions.
7.7.3.1 Test with standardized gas
Upon making sure that the detectors is operable it is possible to carry out a test of its parameters to confirm
its performance.
Test mode is initiated by approaching a permanent magnet to the detector, the display shows the ‘Ad’
message, the detector address stored in its memory and the ‘tE’ message. Test mode is quitted upon
removing of the magnet or within five minutes after test initiation. The location where the magnet is to be
approached is shown in Figure 1.
Test of gas detector with the use of standardized gas is initiated after supplying test gas with specific
concentration to the detector inlet with observation of the detector response (correct indication that alarm
thresholds for CO or NO
2
are exceeded).
Tests assume that momentary concentration of the test gas are measured and alarms are generated
without any delay.
When the detector under test is coupled with the Teta MiniDet detectors the test gas (LPG) must be also
supplied to the second device.
Correct execution of the test needs application of a calibration kit with the standardized
reference gas – carbon monoxide (CO) with concentration of 150 to 300 ppm or nitrogen
dioxide NO
2
with concentration from 5 to 30 ppm (see Table 7).
Unauthorized tests of gas detectors when gas with unknown composition and concentration
is supplied to the detectors is prohibited. Under such circumstances the gas sensor can be
damaged, which leads to loss of the detector calibration.
7.7.3.2 Simulation of alarms for CO /NO
2
gases (S1 alarms)
Simultaneous depressing the arrow buttons
(see Figure 1) and holding them depressed for about three
seconds switches the detector over to the simulation mode for CO /NO
2
gases (S1 alarm). Releasing of these
buttons in the simulation mode initiates consecutive simulation of alarms for CO concentration (Teta
EcoWent detectors) or NO
2
concentration (Teta EcoN detectors).
The simulation makes it possible to check response of input relays at the Control Unit. In case of no
response or improper operation of the Control Unit it must be inspected with correction of erroneous
connections, if any. Contact the equipment manufacturer if the subsequent simulation, after making
corrections, is also unsuccessful.
The simulation mode (S1) is quitted automatically after the simulation is completed or upon depressing any
of the arrow buttons
.
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User Manual: POD-046-ENG R01
