ETS-Lindgren OMS, Руководство пользователя

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Sensor Verification
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Under ambient non-oxygen deficient environments, the OMS will display 20.9%.
As the sensor ages, the reading may decrease in value. To adjust the reading
to 20.9%:
Step Display
1. Enter the password, and then
push the joystick down to
select the Sensor Adjustment
menu.
Sensor Adjustment
2. Push the joystick to the right to
access the submenu.
Set Sensor Span
3. Push the joystick up to
increase the counts and
decrease the percent oxygen
value displayed. Push the
joystick down to decrease the
counts and increase the
oxygen value displayed. Adjust
to a value of 20.9% ± 0.2%,
and then Enter to accept the
value.
The display will indicate a value
between 0 and 255 counts, and then
will display the selected value of
20.9% ± 0.2%. Then the display will
default to Set Sensor Span.
4. Push the joystick to the left to
return to the main menu.
Sensor Adjustment
Sensor Verification to Nitrogen
ETS-Lindgren recommends challenging the OMS with nitrogen every
6 to 12 months.
The filter on the OMS has a 1/4-in male tube fitting designed to connect sample
tubing from a nitrogen cylinder. Expose the OMS to nitrogen using the
on-demand regulator. The reading will drop off to 1% or below in less than
one minute when the sensor is exposed to pure nitrogen. The system will recover
to 20.9% when the nitrogen is removed.