Atest Gaz ProGas 4, User Manual

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Maximum limits for U
s
and R
obc
are provided in Table 10.
More configuration details – see Section 5.4.1.
4.3.2 Operation modes – status details
The level of output current is in proportion to the gas concentration measured by the detector (constant
output signal). Possible signal levels are listed in the table below.
Current output Status
2 mA Critical failure
4 mA..20 mA
The signal level is in proportion to the gas concentration:
4 mA – 0% of the full range
20 mA – 100% of the full range
22 mA Detector overloaded
Table 5: Constant output signals
The level of output current may also correspond to warning of alarm thresholds (stepped intervals). Levels
of output current for specific degrees of gas hazard are listed in the table below.
Current output Status
2 mA Critical failure
4 mA No alarm
9 mA Warning 1
11 mA Warning 2
13 mA Alarm
22 mA Detector overloaded
Table 6: Intervals of the output current according to the detector status
The specific operation mode with respect to information provided at the 4..20 mA current output can be set
upon configuration detectors by means of dedicated software – for details see Section 5.4.
4.4 Relay outputs
Each gas detector has three relay outputs that can be used for the following purposes:
tripping control contacts for status indicators
• Warning 1,
• Warning 2,
• Alarm,
• Failure,
mode of indication: inverted or not
Assignment and operation mode of each relay output can be independently set by means of dedicated
software – see Section 5.4.
Specification of relay parameters is provided in Table 10.
4.5 Bluetooth wireless interface (WI=BT)
Wireless interface enables the operator to control gas detectors from remote locations by means of
dedicated software (see details in Section 5.4).
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User Manual: POD-064-ENG R05