RKI Instruments EAGLE 2 Manual - Manual (Page 301)

EAGLE 2 Operator’s Manual Alarms • 291
If the instrument is sampling a fresh air environment, the oxygen channel
will be in alarm.
For more information about Inert Mode, see
“Appendix N: Using the EAGLE 2 in Inert Mode” on page 293.
8. When monitoring for combustible gas in an inerted tank, be sure the
dilution fitting is installed and multiply the combustible gas reading by 2.
When monitoring for oxygen in an inerted tank, remove the dilution
fitting or seal the dilution hole with your finger.
Alarms
The EAGLE 2 Tank Tester model has two sets of oxygen alarm settings, one
for Normal Mode and one for Inert Mode. The Inert Mode oxygen alarms are
factory-set at 5.0% by volume (rising) and 10.0% by volume (rising). Normal
Mode oxygen alarm setpoints also exist and take effect when you select
Normal Mode at start up.
The rising Inert Mode alarms are used to monitor a purged vessel to alert you
to a rising oxygen condition.
The oxygen level in a fresh air environment is above both Inert Mode oxygen
alarm points so the EAGLE 2 Tank Tester version will go into alarm when
turned on in Inert Mode in a fresh air environment. To silence the alarm,
press the RESET button. The audible alarm silences, but the alarm lights
continue to flash and the display screen continues to indicate an oxygen
alarm. If one of the alarm levels is newly exceeded, the audible alarm sounds
again.
For information about viewing and changing the standard alarms used in
Normal Mode, see “Updating the Alarm Point Settings” on page 115. For
information about viewing and changing Inert Mode oxygen alarms, see
“Appendix N: Using the EAGLE 2 in Inert Mode” on page 293.
Calibration
Use a hexane calibrating source to calibrate the combustible gas LEL range.
Use a 100% nitrogen calibrating source to set the zero reading for the oxygen
channel. RKI Instruments, Inc. recommends using the Single Calibration
method to calibrate the EAGLE 2 Tank Tester model. See “Chapter 4:
Calibration Mode” on page 55. The instructions in that section call for
calibrating the EAGLE 2 with methane. When following these instructions,
be sure to calibrate with hexane rather than methane.
NOTE: Do not calibrate the EAGLE 2 Tank Tester model with the dilution
fitting attached to the inlet fitting.