OX-04 Operator’s Manual
Chapter 3: Measuring Mode
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Performing a Demand Zero
Perform a demand zero before using the OX-04. This sets the reading to 20.9% volume.
1. Find a fresh-air environment. This is an environment free of toxic or combustible gases and of
normal oxygen content (20.9%).
2. Turn on the unit as described above in Turning On the OX-04.
3. Press and hold AIR. The buzzer pulses and the LCD prompts you to continue holding AIR (if
KEY.TONE
is set to
ON
in User Mode).
4. Continue to hold AIR until the LCD prompts you to release it. The OX-04 sets the fresh air
reading. Start up is complete and the unit is now ready for monitoring.
If
Password Protection
is turned
On
(factory setting is
Off
) using the 04 Series Setup
Program, a user-set password is required to perform a demand 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
sets the fresh air reading.
Turning Off the OX-04
1. Press and hold POWER MODE.
2. OFF appears on the display and the buzzer pulses for about five seconds (if
KEY.TONE
is set
to
ON
in User Mode).
3. Release the button when OFF disappears from the display.
If
Password Protection
is turned
On
(factory setting is
Off
) using the 04 Series Setup
Program, a user-set password is required to turn off the OX-04. 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 shuts off.
0000
PASS-W
0000
PASS-W