Duomo 7701 Manual

Operation
Press button 2 to turn the meter
on and off.
After a 15 second warm-up the
meter is ready to use and will
display the normal operating
screen (Fig. 2).
Pressing button 1 will turn the backlight on and off.
Pressing and holding button 1 for more than 2 seconds
will reset the maximum value on the unit.
The unit will turn off automatically after 15 minutes of
inactivity.
When battery supply is low, the low battery indicator
will show (Fig.2). Change the batteries.
NOTE: Only turn the meter on in an area free of CO as
high levels may cause failure during the self-test.
Setup
To enter the setup mode (Fig. 3) turn the unit off then
press and hold button 2.
As the unit turns on it will begin cycling through the
available alarm thresholds. Simply release button 2
when you reach your desired threshold.
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1
1 1
2
2 2
Keypad (Fig. 1)
e: sales@duomo.co.uk
CO Detector (HHCO)
Dual digital displays of current and
maximum carbon monoxide levels
Adjustable CO warning level with "geiger
counter" style audible indicator
Low battery indicator
Auto power off function
Backlight for working in dark areas
Supplied with wrist strap, batteries and
soft carry case
Display
B
B B
Normal Operation (Fig. 2)
B
B B
Setup Mode (Fig. 3)
B
B B
Self-test Mode (Fig. 4)
The unit will then enter self-test mode (Fig. 4). The current
alarm threshold will be displayed at the top of the screen
and the current temperature at the bottom.
To change the temperature display between centigrade
and fahrenheit press and hold button 1.
- t: 01905 797989 -
A = CO reading in ppm
A
A A
B = Maximum CO reading
since power-on
C
C C
C = Low battery indicator
A
A A A = Alarm threshold
B = N/A
C = N/A
C
C C
A = Current alarm
A
A A
threshold
B = Current temperature
C
C C
C = N/A
f: 01905 774296 | © Duomo (UK) Ltd. 2007