AO2040/CALDOS Advance Optima Continuous Gas Analyzers

Ignition SuppressionGas
Contamination of theIgnition SuppressionGas Line
Use air as the ignition suppression gas (quality per lSO 8573-1, class 3; see’Operating Specifications” section, page 20).
Mechanical treatment of the ignition suppression gas line can lead to contamina-tion of the gas line.
When the contamination gets to the ignition suppression gas valve, the valve doesnot close completely

and the ignition suppression gas flows into the housing withthe full working pressure ofp,= 250-500 kPa (= 2.5-5 bar).

An indication for apossible damage to the housing is an outward vaulting of the display and controlunit key pad.
For a reliable retention of the contamination it is absolutely necessary to install thedelivered compressed air conditioning filter in the ignition suppression gas line.

AO2040

Changing FactoryWiring
Potentialcompensation
Securing ElectricalLines
Shielded Lines
Lines for IntrinsicallySafe Signals
Factory internal wiring between the isolation relays and the system controllerand l/0 board connectors can be

changed by the user. However, no addi-tional wiring should be added. Changes should be documented in theanalyzer

data sheet. The addition of cables to device-internal wiring or theinstallation of additional electrical equipment represents

a change to theelectrical device and is hence forbidden. The operating specifications andthe routing instructions must be followed.
The external potential compensation connection or the protective lead mustbe connected to the local potential

compensation point. The connection tothe local potential compensation point must be made before all other con-nections.

Minimum conductor section = 4 mm?. The A02040-CU Ex centralunit can be hazardous if the potential compensation

connection is inter-rupted inside or outside the central unit or if the potential compensationconnection is loosened or removed.
All electrical wiring, including the A02040-CU Ex central unit wiring, must befirmly secured.
Shielded lines (e.g. the system bus cable) must be routed through the metalwiring connectors. The shield braid must be placed on the cable connectors
The lines for intrinsically safe signals should only be connected to the bluecable connectors.inside the A02040-CU

Ex central unit they must beseparated from other lines by at least 8 mm. Only suitable electrical circuitsshould be connected to the isolation modules terminals!