Eagle Instruction Manual Appendix F: Eagle Tank Tester Model • 70
Dilution fitting (1:1)
CAUTION:When measuring oxygen readings, remove the dilution fitting
or use your finger to seal the small dilution hole on the side of
the dilution fitting.
The standard combustible gas sensor requires oxygen to operate. In
environments where there is not enough oxygen to operate the
combustible gas sensor, (for example a tank purged with an inerting
gas), the 1:1 dilution fitting adds sufficient oxygen by blending
ambient air with the incoming sample. The standard dilution fitting
dilutes at a ratio of 1:1 (one part air to one part sample).
To attach the dilution fitting:
1. Attach the dilution fitting’s quick disconnect fitting to the Eagle’s
inlet fitting.
2. Attach the hose to the opposite end of the dilution fitting.
NOTE: When using the dilution fitting, multiply the combustible gas
reading (LEL or PPM) by 2 to determine the actual
combustible gas concentration. Always remove the dilution
fitting or seal the dilution hole to measure for oxygen.
Alarms
The Eagle Tank Tester model has two alarms for oxygen. They are
factory-set at 5.0% by volume (increasing) and 19.5% by volume
(decreasing).
The increasing alarm is used to monitor a purged vessel to alert you to
a rising oxygen condition. The decreasing alarm is generally used for
confined space entry to warn you of dangerously low breathing
levels.
ANY oxygen level is either above or below one of these alarm levels,
so the Eagle Tank Tester version will go into alarm when first turned
on. 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.
To eliminate an oxygen alarm that is not being used:
Either the increasing or decreasing oxygen alarm can be turned off in
Setup mode (see “Updating the Alarm Point Settings” on page 32.)
Turning off the alarm clears the alarm lights and display of an
unnecessary alarm.
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