Extech Instruments CO250 User Manual

SETUP (alarm limit and temperature scale)
In the normal mode press and hold the
button for more than 1 sec to enter the setup mode.
To exit the setup mode, press the CAL/Esc button when either P1.
0
or P3.
0
is displayed.
P1.0 CO
2
ALARM Limit
When entering setup mode, P1.
0
and “AL” are displayed.
Press the M
N
/AV button to scroll to P1.
1
for setting CO
2
alarm threshold. The current CO
2
set
value will be blinking.
Press the MODE/ button to increase or the DP/WBT/ button to decrease the value. Each
press adjusts 100 ppm. The alarm range is from 100 to 9900ppm. When the preferred alarm
value is set, press the M
N
/AV button to exit and save the setting or the CAL/Esc button to exit
without saving and return to P1.
0
.
P3.0 TEMPERATURE SCALE
Press the MODE/ button or the DP/WBT/ button in P1.
0
to access P3.
0
for setting the
temperature scale.
Press the M
N
/AV button to go into P3.
1
for setting the temperature units. The currently selected
units (°C or °F) will be blinking in the display. To switch units, press the MODE/ button. Press
the M
N
/AV button to save the setting or press the CAL/Esc button exit without saving and return
to P3.
0.
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Extech Instruments CO250 Specifications

General

Brand	Extech Instruments
Model	CO250
Category	Measuring Instruments
Language	English