ABB Endura AZ20 series

Endura AZ20 series probe
Combustion oxygen monitor Appendix B – Endura AZ20/ZFG2 Replacement Probe
30 IM/AZ20P–EN Rev. G
Appendix B – Endura AZ20/ZFG2 Replacement Probe
The Endura AZ20/ZFG2 replacement probe can be connected to existing ZMT transmitters or ZDT-FG analyzers to replace exising
ZFG2 probes. To allow direct replacement, Endura AZ20/ZFG2 replacement probes are supplied with a single M20 gland conduit of 6
or 10 m (18 or 30 ft) length. NPT versions are supplied with a single
1
/2 in NPT female threaded entry only.
Note. For Endura AZ20/ZFG2 replacement probe test gas and connection details at the existing ZMT transmitter or ZDT-FG
analyzer, refer to the following manuals:
 IM/ZDT-FG – copies of the IM/ZDT/FG manual can be downloaded from the ABB web site (www.abb.com).
 IM/ZMT – copies of the IM/ZMT manual can be downloaded from the ABB website (www.abb.com).
Fig. B.1 Endura AZ20/ZFG2 Replacement Probe with Existing System
9
8
7
6
5
4
3
2
1
PT
1000
Z-MT Oxygen Analyzer
% Oxygen
20.0
ZMTZDT-FG
Measured gas
pressure limits
– must be
constant
±0.35 bar (5 psi)
20 mm or
1
/2 NPT Gland
External Reference Air Supply Line Required for ZMT
Transmitter or ZDT-FG Analyzer Without Internal Pump
Vent to Dry Area
(Unrestricted Flow)
Flue
ABB Reference Air Unit – Existing Installation
or ABB Reference Air Pump – see Appendix
D, page 36
TG 1
Vent
External Reference
Air Connection
Existing ZMT Transmitter or
ZDT-FG Analyzer
– see Note below
Endura AZ20/ZFG2
Replacement Probe
No AutoCal**
Endura AZ20/ZFG2 Replacement Probe Is
supplied with probe conduit
(6 or 10 m [18 or 30 ft])
Conduit connections should be made at ZMT/ZDT
End (No conduit on NPT version)
*Test Gas
Internal Reference Air Connection – see Appendix B.2, page 33
External Reference Air
Supply from
Transmitter / Analyzer
Conduit Including Internal Reference Air
Line From Transmitter / Analyzer with
Reference Air Supply
Ref. Air
0.5 to 2 m
(1.7 to 6.6 ft.)
600 °C (1112 °F)
70 °C
(158 °F)
–20 °C
(–4 °F)
–20 °C
(–4 °F)
*Optional solenoid valve where the line length between gas panel and probe head > 10 m (32.8 ft.).
**See Probe Specification, page 28 for heater operational requirements.