Extech Instruments CO250 User Manual page 5

SETUP (alarm limit and temperature scale)
In the normal mode press and hold the
mode.
To exit the setup mode, press the CAL/Esc button when either P1.
P1.0 CO ALARM Limit
2
When entering setup mode, P1.
Press the M /AV button to scroll to P1.
N
CO set value will be blinking.
2
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
CAL/Esc button to exit without saving and return to P1.
P3.0 TEMPERATURE SCALE
Press the MODE/▲ button or the DP/WBT/▼ button in P1.
the temperature scale.
Press the M /AV button to go into P3.
N
selected units (°C or °F) will be blinking in the display. To switch units, press the
MODE/▲ button. Press the M
button exit without saving and return to P3.
button for more than 1 sec to enter the setup
and "AL" are displayed.
0
for setting CO alarm threshold. The current
1
2
/AV button to exit and save the setting or the
N
.
0
to access P3.
0
for setting the temperature units. The currently
1
/AV button to save the setting or press the CAL/Esc
N
0.
5
or P3. is displayed.
0 0
for setting
0
CO250-EU V1.2 6/09