ABB Endura AZ40 Manual page 22

3. Use the / keys to scroll to the Advanced level and
press the key to display Advanced level menu options.
IMPORTANT (NOTE)
If passwords have been set it is necessary to enter
the correct password to enable access to the
Advanced level – refer to Operating instruction
OI/AZ40-EN for password setup details.
4. Use the / keys to scroll to the Calibrate level
screen:
Menu
Calibrate
Exit
5. Press the key to enter Calibrate level and display menu
options, then use the
Rate Test menu:
Calibrate
Calibration Setup
Blowback Setup
Scheduled Events
Flow Rate Test
Man. Valve Control
Back
6. Set the span 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 Span Gas is displayed:
Flow Rate Test
O2 < 5%. Press Next
To Apply Span Gas
Next
22
Select
/ keys to scroll to the Flow
Select
7. Press the key (below the Next prompt). A screen (similar to
the following example) is displayed:
Flow Rate Test
Increase Span Flow
60.1 mV
Next
Increase the span 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 Span Flow
Another 0.5 SCFH
Next
The span 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).
9. Press the key (below the Next prompt).
The following screen is displayed:
Flow Rate Test
Adjust Zero Gas Flow
To Match Span Gas
Next
Adjust the zero gas flow to match the same flow rate set for
the span gas.
CI/AZ40-EN Rev. A