Extech Instruments EA80 User Manual page 6

CO Alarm Operation
2
Setting the Alarm Limit Values
1. Press "ALARM" button to turn on the alarm function, the "ALM" icon, and current
value are displayed.
2. Press "SET" button to enter High/Low limit value
setting mode, the "SET" icon is displayed and
hundred and thousand digits of the high limit value
will flash.
3. Press " " or " " button to set desired value.
4. Press " " button to move the cursor to set the tens
and ones.
5. Press " " or " " button to enter the desired value.
6. Press " " button to move the cursor to the hundred and thousand digits of the low
limit value.
7. Press " " or " " button to set desired value.
8. Press " " button to move the cursor to move the cursor to set the tens and ones of
the low limit value.
9. Press " " or " " button to set desired value.
10. To change any setting, press " " or " " button to move the cursor to desired high
or low limit value position.
11. Press "↵" button to store these setting and exit this mode.
Turning Alarm On / Off
Press "ALARM" button to turn on the alarm function, "ALM" is displayed.
When the CO value is below the low limit value, the meter displays " " mark and
2
beeps.
When the CO value exceeds the high limit value, the meter displays " " and beeps.
2
To exit the ALARM function, press "ALARM" button again.
Setting the Real Time Clock
1. Press "SET" button to enter the real-time clock
setting mode, "SET" is displayed and the minutes
are flashing.
2. Press " " or " " button to set the minutes.
3. Press " " button to move the cursor to seconds.
4. Press " " or " " button to set the seconds.
5. Press " " button to move the cursor the days.
6. Press " " or " " button to set the day of the real time date. (Please note that this
is not a calendar. Days are elapsed days up to 99 total)
7. Press " " button to move the cursor to the hours. (Please note that this is a 24
hour clock)
8. Press " " or " " button to set the hours.
9. To change any setting, press " " or " " button to move the cursor to desired
position.
10. Press "↵" button to store the settings and exit this mode.
SET
ALM
CO
2
SET MAX MIN
8888
ALM
88
R
M Err Err
8888 8888
CO
m:s
2
6 EA80 V2.1H 11/06
CO
2 ppm
ppm ppm
CO
2
CAL
INTV CO
ppm
2
DEW
WET
°C°F
ppm CO d-h %RH ppm
2