ABB Endura AZ25 Series, Руководство пользователя

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Endura AZ25 series probe
Combustion oxygen monitor 3 Mechanical installation
OI/AZ25P–EN Rev. E 9
3.5 Pneumatic connections
3.5.1 Pneumatic entry types
3.5.2 Schematic – Endura AZ25 system without AutoCal
Note.

The configuration option of having flow restrictors fitted to the probe determines the way the reference air and test gas flow
is controlled. Ensure the instructions for the pneumatic connections are followed accurately – an incorrect configuration at
the probe can cause errors and / or permanent damage.

All configurations – do not use gas mixers online to supply test gases to the probe(s) unless it can be confirmed that
errors are not introduced by the high delivery pressures required to the probe(s).

Probes with restrictor – the reference air flow is regulated by a restrictor installed in the probe which requires a set
pressure of 1 bar (15 psi) to deliver the correct flow. Because the gases are delivered as a pressure at the probe it is
permissible to use parallel pipework for multiple-probe installations.

Probes without restrictors – the reference air and test gas flow is regulated by flowmeters (with integral needle valves)
fitted in the delivery lines to the sensor – one flowmeter is required in each delivery line.
Endura AZ25 AutoCal unit / test gas 1, 2 and vent
Metric Imperial
1
/
4
in. BSP female threaded
entry supplied with 6 mm OD
compression fitting
1
/
4
in. NPT female threaded
entry supplied with
1
/
4
in. OD
compression fitting
Table 3.1 Pneumatic entry types at Endura AZ25 AutoCal unit
Endura AZ25 probe
Metric Imperial
Ref. Air:
1
/
4
in. BSP Ref. Air:
1
/
4
in. NPT
Test gas: 6 mm dia. stud
Table 3.2 Pneumatic entry types at Endura AZ25 probe
*Refer to Appendix B, page 33 for ABB part numbers
**Clean dry instrument air free from hydrocarbons
Fig. 3.4 Schematic – Endura AZ25 system without AutoCal
Output signals
Relays
Mains supply
Endura AZ25 6-core screened sensor cable (length coded option) –
maximum length 100 m (328 ft.)
Test gas connection (6 mm stub)
– see Section 3.5.4, page 11 for
pneumatic requirements
Reference air
inlet connection:
Reference air supplied to
probe using:
ABB reference air
pump*
OR
ABB 5 micron / oil
coalescing
filter regulator*/**
see Section 3.5.4,
page 11 for pneumatic
requirements
Endura AZ25 probe
Endura AZ25
remote transmitter
Metal M16 gland or
1
/
2
in. NPT adaptor