03 Series Operator’s Manual
Operation • 20
condition after the second beep. The current setting for the buzzer will
be displayed and the current volume will be emanating from the buzzer.
3. Use the AIR button to select LO or HI. The buzzer volume during the
simulated alarm condition will change as you select a different volume.
4. Press and release the POWER MODE button to save the setting and
return to Normal Operation.
5. If LO was selected, “B--LO“ will appear at the bottom of the Normal
Operation screen.
Display Mode, CO-03 and HS-03
This section describes Display Mode for CO-03 and HS-03 instruments
only. See “Display Mode, OX-03” on page 22 for a description of the OX-
03’s Display Mode.
You can access Display Mode while in Measuring Mode by using the
POWER MODE button. In Display Mode you can view and reset the peak
readings, view the TWA and STEL values, view the detection range full
scale, and view the date and time.
STEL is an acronym for short-term exposure limit, and it is the average
reading of the target gas during the last 15 minutes. TWA is an acronym for
time-weighted average, and it is the average reading for the target gas
during the last eight (8) hours. If eight (8) hours has not elapsed since the
unit was turned on, the TWA is still calculated over eight hours, with the
missing time assigned a zero (0) value for the readings. Similarly, if the unit
has not been on for 15 minutes, the missing time is assigned a 0 value and
the STEL is calculated over 15 minutes. The peak readings, STEL values,
and TWA values are cleared when the unit is turned off.
To enter Display Mode, do the following:
1. Make sure the 03 Series is in the Measuring Mode Normal Operation
screen. The 03 Series must be in the Normal Operation Screen for you
to access Display Mode.
BEEP
b - HI
B--LO
CO
ppm
0
