ABB Endura AZ40 Manual page 24

6. Set the zero gas regulator to a low value, for example, 8 psig.
Press the key (below the Select prompt).
The Flow Rate Test screen is displayed and a prompt
Press Next To Apply Zero Gas is displayed:
Flow Rate Test
O2 >5%. Press Next
To Apply Zero Gas
Next
7. Press the key (below the Next prompt).
A screen (similar to the following example) is displayed:
Flow Rate Test
Increase Zero Flow
–6.7 mV
Next
Increase the zero gas flow rate by approximately 0.25 SCFH
(0.15 l/min). Allow 15 seconds for the mV reading to stabilize.
Record the flow rate and mV reading.
Repeat until no further change in mV reading occurs with
increase in flow rate. Record the flow rate at which the mV
reading first reached its stable value.
8. Press the key (below the Next prompt). The following
screen is displayed:
Flow Rate Test
Increase Zero Flow
Another 0.5 SCFH
Next
The zero gas flow rate should be adjusted to the flow rate for
stable mV value (noted above) plus a further 0.5 SCFH
(0.25 l/min).
24
9. Press the key (below the Next prompt). The following
screen is displayed:
Flow Rate Test
Adjust Span Gas Flow
To Match Zero Gas
Next
Adjust the span gas flow to match the same flow rate
set for the zero gas.
10.Press the key (below the Next prompt).
The Sample Flow Recovery status message is displayed:
Flow Rate Test
Sample Flow Recovery
Next
Wait until the progress bar indicates completion.
CI/AZ40-EN Rev. A