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. With the analyzer running, 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 709 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. 709 Display: ‘CAL’, ‘FLo’, ‘oPEn’. Action : Press the Func Key to bypass.
4. 709 Display: ‘CAL’, ‘FLo’, ‘CLos’. Action : Press the Func Key to bypass.
5. 709 Display: ‘0ppm’, ‘Co’, ‘rEF’. Action : Press the Func Key to bypass.
6. 709 Display: ‘20.9%’, ‘o2’, ‘rEF’. Action : Press the Func Key to bypass.
7. 709 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.
8. 709 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.
9. 709 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 709 will return to normal operation
Appendix C: ERROR CODES & TROUBLESHOOTING (Continued)
Problem
Possible Cause
Corrective Action
Efficiency reading incorrect
NET efficiency selected.
Ambient temperature probe
not plugged in to T2.
Incorrect fuel selected.
Select GROSS efficiency.
See page 17.
Plug ambient probe into T2.
See page 11.
Select the proper fuel for the
equipment being tested. See
page 8.
Readings are erratic when
working on oil fired equip-
ment.
A773 oil filter not installed or
installed incorrectly.
Make sure the optional oil fil-
ter (A773) is installed. See
Appendix B.
One or all of the following
parameters; Ratio, CO air
free, excess air, and efficien-
cy read and print dashes.
Measured values are such
that the calculated values of
these parameters are out of
range.
Redo combustion test. Since
these are calculated values,
the measure values must be
within certain levels for these
to display. If the measured
oxygen level is above 19.9%
these parameters won’t
read.
These parameters might not
display or be applicable in
some tests.
Analyzer won’t turn off
Oxygen and/or carbon
monoxide levels outside lim-
its.
Allow the analyzer to purge
longer.
36
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