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Priorities
State of operation
1 (highest)
Alarm threshold exceeded
2
Second warning threshold exceeded
3
First warning threshold exceeded
4
Failure of the detector, system bus, connection to the Alpa EcoWent XT detector or information
about incorrect settings of the configuration switch
5 (lowest)
Regular operation of the detector (no errors)
Warm-up in progress
Table 1: Priorities of output signals produced by the Alpa EcoDet XT Gas Detector
Figure 1: Amperage of output current and behaviour of LED indicators for individual operation modes
Type of gas to be monitored, warning /alarm thresholds as well as corresponding output
currents are specified for each specific detector in its calibration certificate.
Operation of a gas detector consists in continuous measurements of gas concentration within the detector
vicinity as well as periodic tests of the gas sensor. Results of the foregoing operations are used to define
operation modes described in the following sections.
1.2.1
Operation
It is the mode of operation when the detector works properly and takes regular measurements.
Concentration of gases is below the hazardous levels and no irregularities in operation of the device are
detected. Operation of the detector needs no particular attention except for the following:
verification of the detector indications as frequently as possible (daily inspection is
recommended),
regular preventive maintenance and inspections to be carried out by a serviceman (see Section
9.4.3).
s. 6|25
User Manual: POD-043-ENG R03
Gas concentration
[%LEL]
Output current
[mA]
OK
indicator
ALARM
indicator
OPERATION
WARNING 1
WARNING 2
ALARM
Summary of Contents for Alpa EcoDet XT
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