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MANUAL CALIBRATION
OXYGEN SENSOR TEST
To determine if the O2 sensor is working properly, verify the sensors
reaction by exposing it to a calibration gas void of oxygen, such as 100%
methane or 100% nitrogen.
From the working display press & hold the TICK/MENU BUTTON (B)
until the top line reads USER MENU. Scroll with SAVE/ZERO BUTTON
(C) until the bottom line reads O2 TEST.
Apply proper gas and press & release the TICK/MENU BUTTON (B) to
start the test. A 20 second countdown will begin. If the sensor shows
proper depletion within this period, PASSED will flash on the display.
Press & release the POWER/MUTE BUTTON (A) to return to the
working display.
If the O2 sensor does not respond properly within the 20 second test,
FAILED will appear on the display.
Consult the factory in the event of any failure. Press & release the
POWER/MUTE BUTTON (A) to return to the working display.
NOTE:
A calibration failure is indicated on the display by FAILED. Re-
calibration should be attempted. Any instrument that does not accept
calibration should be taken out of service. Please contact the factory for
any needed repairs.