ABB Endura AZ20 series

Combustion Oxygen Monitor
Endura AZ20 Series Probe 2Introduction
IM/AZ20M–EN Rev. B 5
1.9 Safety Recommendations
For safe operation, it is imperative that these service instructions
be read before use and that the safety recommendations
mentioned herein be scrupulously respected. If danger warnings
are not heeded to, serious material or bodily injury could occur.
1.10 Service and Repairs
Serviceable items are listed in Section 7, page 42 and Section 8,
page 45. Maintenance and servicing of the instrument's
components must be performed by authorized personnel only.
Any attempt at repairing the instrument in contravention of these
principles could cause damage to the instrument and corporal
injury to the person carrying out the repair. It renders the
warranty null and void and could compromise the correct
working of the instrument and the electrical integrity or
compliance of the instrument.
1.11 Potential Safety Hazards
The following potential safety hazards are associated with
operating the analyzer:
 Electrical (line voltage)
 Probe weight
2Introduction
This Maintenance Guide provides dismantling and reassembly
procedures for AZ20 probes (both integral and remote versions)
and AZ20/ZFG2 replacement probes. Kits containing all the
parts required to complete a repair are identified in Section 7,
page 42 (probe) and Section 8, page 45 (transmitter).
2.1 Earth to Probe Chassis
Warning. The installation of the instrument should be
performed exclusively by personnel specialized and
authorized to work on electrical installations, in accordance
with relevant local regulations.
Warning.
 When in operation, the cell end of the probe reaches
temperatures up to 100 °C (212 °F). Allow the cell to
reach ambient temperature before starting maintenance
procedures.
 Before undertaking maintenance procedures, identify
and obtain the required spares / replacement items.
 After completing maintenance procedures, refer to the
relevant user guides (transmitter User Guide IM/AZ20E–
EN and probe User Guide IM/AZ20P–EN) to install,
connect and configure the system.
 Install and use associated equipment in accordance
with the relevant national and local standards.
Warning. The earth to chassis wire A in the probe head
must be connected during probe operation and testing. If it
is disconnected for maintenance or component
replacement purposes, it must be reconnected before
testing or using the probe.
Fig. 2.1 Earth to Probe Chassis
ACJC
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1
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A