Test Gas And Reference Air Supply Configurations - Autocal Systems With Restrictors - ABB Endura AZ25 Series User Manual

Endura AZ25 series probe
Combustion oxygen monitor
3.5.5 Test gas and reference air supply configurations – AutoCal systems with restrictors
Endura AZ25
AutoCal unit
Test gas supply:
restrictor in probe limits
flow to l/min (2.118 scfh)
at 1 bar (15 psi)
Non-return
valve
TG2 TG1
Test gas 1 /
1 bar (15 psi)
Clean dry oil-free instrument air
INPUT: 10 bar (145 psi) max.
OUTPUT: 1 bar (15 psi) max.
Test gas 2
Test gas 2 (optional) from bottled gas –
adjusted to 1 bar (15 psi) output
Fig. 3.7 System using air as test gas 1 and
bottled gas as (optional) test gas 2
12
Endura AZ25 probe
Reference air supply:
restrictor in probe limits
flow to 0.3 to 0.5 l/min
(0.64 to 1.06 scfh)
at 1 bar (15 psi)
5 µm / Oil
coalescing
filter regulator
Endura AZ25
AutoCal unit
Test gas supply:
restrictor in probe limits
flow to l/min (2.118 scfh)
at 1 bar (15 psi)
Non-return
valve
TG2 TG1
Clean dry oil-free instrument air
INPUT: 10 bar (145 psi) max.
OUTPUT: 1 bar (15 psi) max.
Test gas 1 from bottled gas –
adjusted to 1 bar (15 psi) output
Test gas 2
Test gas 2 (optional) from bottled gas –
adjusted to 1 bar (15 psi) output
Fig. 3.8 System using 2 bottled test gases
3 Mechanical installation
Endura AZ25 probe
Reference air supply: restrictor
in probe limits flow to 0.3 to 0.5
l/min (0.64 to 1.06 scfh)
at 1 bar (15 psi)
Reference
air pump
OR
5 µm / Oil
coalescing
filter regulator
OI/AZ25P–EN Rev. E