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Chapter 2: Description
OX-04 Operator’s Manual
Sensor
The O
2
sensor is an electrochemical cell that consists of two precious metal electrodes in a dilute
acid electrolyte. A gas permeable membrane covers the sensor face and allows gas to diffuse into
the electrolyte. The gas reacts in the sensor and produces a current proportional to the
concentration of the target gas. The OX-04’s circuitry amplifies the current, converts the current
to a gas concentration, and displays the concentration on the LCD.
Hydrophobic Filter
The white, circular hydrophobic filter fits into a recessed area in the front case and is held in place
by the sensor gasket. It prevents water and particulates from entering the instrument.
Infrared Communications Port
An infrared (IR) communications port is located at the top of the instrument, near the LED.
Logged data transmits through the port in standard IrDA protocol. A computer’s infrared port or
an IrDA/USB cable connected to a USB port can be used to download data to the 04 Series
Datalogging Program. See the 04 Series Datalogging Program operator’s manual for data logging
and downloading instructions.
Batteries
2 AAA batteries (alkaline or Ni-MH) power the OX-04. At 25°C alkaline batteries will last at
least 9,000 hours (375 days) and Ni-MH batteries will last at least 6,000 hours (250 days). The
battery icon in the upper right of the LCD shows remaining battery life.
A low battery warning activates when the OX-04 detects a low battery voltage. The OX-04
sounds a dead battery alarm when battery voltage is too low for Measuring Mode.
WARNING: Use only Duracell MN2400 or PC2400 or Eneloop BK-4MCC batteries to
maintain the QPS classification of the OX-04. Use of other batteries will void the
QPS classification and may void the warranty. Do not mix old/new or different
types of batteries.
AVERTISSEMENT: Utiliser uniquement des piles Duracell MN 2400 ou PC 2400 ou
Eneloop BK-4MCC de maintenir la classification QPS de la OX-04.
L’utilisation d’autres piles annule la classification QPS et peut annuler
la garantie. Ne mélangez pas les anciennes/nouvelles ou différents types
de piles.