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2.3 Setting Screen
The Setting screen allows users to set or change Date, Time, and warning limit. Use an
arrow and
ENTER
keypads to enter into the Setting screen. Then press the
ENTER
keypad to highlight the parameter that needs to be changed / set. The chosen
parameter will be at the bottom of the window. Press
ENTER
keypad again and using
the keypads scroll through the parameter options or change the number and then press
ENTER
to confirm the parameter’s setting. Press
BACK
keypad to back to the previous
screen.
Figure 5
Setting Screen
Alarm level setting
The user may turn on or off the excess exposure limit warning. The user may input
any value at the increment of 1ppm between 0 and 999ppm. For your reference, two
levels of limit for carbon monoxide are in common: 1) Threshold Limit Value (TLV) of
35 ppm as a "ceiling limit" established by The National Institute for Occupational Safety
and Health (NIOSH); 2) Permissible Exposure Limit (PEL) of 50 ppm established by US
Occupational Safety & Health Administration (OSHA). All of these concentrations refer
to exposures with durations of 8 hr/day, 40 hr/week for a working lifetime and all are
attempts to establish a "no effect" level. The Immediately Dangerous to Life and Health
(IDLH) limit is 1200ppm. Below are some other exposure levels and effects of carbon
monoxide exposure from various sources:
Setting
Date………[2008-09-06]
Time………[ 08:47:25 ]
Alarm………[ OFF ]
