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Chapter 3: Measuring Mode
OX-04 Operator’s Manual
9. If the OX-04 experiences a sensor failure during start up, a screen indicating that the sensor
failed appears and the buzzer sounds a double pulsing tone once per second.
You cannot acknowledge the failure and continue to Measuring Mode. Replace the failed
sensor as soon as possible.
10. If
A.ZERO
is set to
ON
(factory setting is
OFF
, see page 85), the instrument prompts you to
do an auto zero. An auto zero operation sets the reading to 20.9% volume.
WARNING: Make sure that the instrument is in a known fresh air environment (an
environment free of combustible or toxic gases and of normal oxygen content,
20.9%) before performing an auto zero operation. If you perform an auto zero
operation in an area with gases present, the adjustment will not be accurate.
You must press and release the POWER MODE button to perform an auto zero function. If
you do not press any key, after 15 seconds, the instrument enters Measuring Mode without
performing an auto zero.
If
Password Protection
is turned
On
(factory setting is
Off
) using the 04 Series Setup
Program, a user-set password is required to perform an auto zero. When the password
screen appears, adjust each digit with the AIR button and press and release the POWER
MODE button to move on to the next digit. Once the password is entered, the instrument
performs the auto zero.
11. The OX-04 is now monitoring for gas in Measuring Mode. The Measuring Mode Screen
displays the current gas reading.
O2
FAIL
SENSOR
%
A .ZERO
YES .MODE
NO .AIR
0000
PASS-W
O2
0.0
vol%
