7 • Description
03 Series Operator’s Manual
IrDA Port
An infrared (IR) communications port is located just to the left of the alarm
LED at the top of the front case beneath the clear lens. The data
transmitted through the port is in standard IrDA protocol. A computer’s
infrared port or an IrDA/USB cable connected to a computer’s USB port
can be used to download data saved by the 03 Series to a computer using
the 03 Series Data Logger Management Program. See the 03 Series Data
Logger Management Program operator’s manual for data logging and
downloading instructions.
Printed Circuit Board
The primary function of the 03 Series’ printed circuit board is to amplify the
signal sent to it from the sensor, convert the signal to a meaningful
measurement of gas concentration, display the gas concentration on the
LCD, store STEL, TWA, and peak gas readings, and activate the alarm
circuit if an alarm point has been reached. It monitors battery level, battery
failure, and sensor failure. It also controls various operating modes of the
unit.
NOTE: The printed circuit board contains no user serviceable parts.
Batteries
Two AAA-size alkaline batteries run the 03 Series. At 25°C the alkaline
batteries last at least 3,000 hours. The battery icon on the LCD shows
remaining battery life.
When the 03 Series detects low battery voltage, a low battery warning is
activated. When battery voltage is too low for normal operation, the 03
Series sounds a dead battery alarm.
The alkaline batteries can be replaced by removing the battery cover on
the rear case. Turn the captive battery cover screw counterclockwise to
release the door. See “Replacing the Batteries” on page 64 for detailed
battery changing instructions.
WARNING: To prevent ignition of a hazardous atmosphere, batteries
must only be changed in an area known to be
nonhazardous.
