Appendix D: CO ALARM & AUTO OFF SETTINGS
Setting the Carbon Monoxide Alarm Point and/or Auto Power Off Mode
The CO alarm and auto power off settings can be changed as necessary by
performing the following procedure.
WARNING :
Changing parameters in field calibration mode can adversely
affect the operation of your analyzer. Follow the instructions carefully.
1. Press and hold the FUNC and Down Arrow keys for approximately 5 seconds
until a beep is heard. Press and hold the Scroll/Enter Key down until ‘FILD
CAL’ is displayed. The 706 will cycle through a 30 second countdown then
display ‘CAL’, Air’, gAS’.
2. Use the Up Arrow Key to select ‘Air’ by making it blink. Press the Scroll/Enter
Key to accept the selection.
3. 706 Display: ‘CAL’, ‘FLo’, ‘oPEn’. Action : Press the Func Key to bypass.
4. 706 Display: ‘CAL’, ‘FLo’, ‘CLos’. Action : Press the Func Key to bypass.
5. 706 Display: ‘0ppm’, ‘Co’, ‘rEF’. Action : Press the Func Key to bypass.
6. 706 Display: ‘2000’, ‘A-r’, ‘SEt’. Action : If you are not changing the CO alarm
point press the Func Key. Otherwise press the Up and Down Keys to set the
ppm level the alarm will sound at. Factory default is 2000ppm. Press the
Scroll/Enter Key to accept the selection.
7. 706 Display: ‘Auto’, ‘oFF’, ‘En’. Action : If you are not changing the auto power
off mode press the Func Key. Otherwise press the Up and Down Arrow Keys
to enable (En) or disable (dis) the auto off function. Factory default is enabled
(En). Press the Scroll/Enter Key to accept the selection.
8. 706 Display: ‘CAL’, ‘StoP’, ‘go’. Action : Press the Up Arrow Key to select
‘StoP’ by making it blink and press the Scroll/Enter Key to accept the selec-
tion. The 708 will return to normal operation
Operating Instructions:
A. Powering up the 706
1. Turn the unit on in an
uncontaminated environment
(clean air
away from the system in question) by holding down the red
ON/OFF switch for 2 seconds.
2. The 706 will power up and go through a 30 second self test to
ensure the unit is operating properly.
3. When the display shows 0 ppm, you are ready to measure CO.
B. Attaching Mini Pump Protection Filter
1. Obtain the pump filter assembly and push the open end of the
tube onto the inlet at the top of the 706 (refer to figure below).
C. Measuring CO in Ambient Air
1. Complete steps A and B above.
2. Place the 706 in any area to measure CO.
3. The 706 has an alarm that will sound at 500 ppm (factory set)
for your safety.
NOTE: The instrument has an auto shut off after 10 minutes should
no keys have been pressed for this period and as mentioned above
that the CO is below 15ppm. Should the CO be above 15ppm then
the 10 minute auto shut off countdown will not begin till the CO
has gone below 15ppm.
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