Appendix D: CO ALARM & AUTO OFF SETTINGS
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 2 seconds until a beep is heard. Press and hold the
Scroll/Enter Key down until ‘FILD CAL’ is displayed. The 712 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. 712 Display: ‘CAL’, ‘FLo’, ‘oPEn’. Action : Press the Func Key to bypass.
4. 712 Display: ‘CAL’, ‘FLo’, ‘CLos’. Action : Press the Func Key to bypass.
5. 712 Display: ‘CAL’, ‘LEAK’, ‘rEF’. Action : Press the Func Key to bypass.
6. 712 Display: ‘0ppm’, ‘Co’, ‘rEF’. Action : Press the Func Key to bypass.
7. 712 Display: ‘20.9%’, ‘o2’, ‘rEF’. Action : Press the Func Key to bypass.
8. 712 Display: ‘0.0mbar’, ‘0.0’, ‘oFS’. Action : Press the Func Key to bypass.
9. 712 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.
10. 712 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.
11. 712 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 712 will return to normal operation
45
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 equip-
ment being tested. See page 8.
Readings are erratic when working
on oil fired equipment.
Oil filter not installed or installed
incorrectly.
Make sure the optional sulfur filter
(A773) is installed. See Appendix B.
One or all of the following parame-
ters; Ratio, CO air free, excess air,
and efficiency read and print dashes.
Measured values are such that the
calculated values of these parame-
ters 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.
Pressure prints as “N/A” on my com-
bustion analysis print out.
During combustion analysis the pres-
sure function is disabled. The
manometer feature is a separate
function and must be printed sepa-
rately.
Perform the combustion test and
then perform a pressure test. Save
each test in a different location and
print each test.
Battery will not charge or hold a
charge.
Defective charger or battery.
Replace the charger or battery.
Send to TPI for service.
Beeping noise heard during charg-
ing.
Defect in charging circuit or shorted
battery.
Disconnect from the charger and
contact TPI at 800-368-5719.
Analyzer won’t turn off
Oxygen and/or carbon monoxide lev-
els outside limits.
Manual sensor initialization was tried
and unsuccessful.
Allow the analyzer to purge longer.
Press and hold down the Up Arrow
and Func keys at the same time for
5 to 7 seconds. The analyzer will
beep. Release the keys and turn the
analyzer off normally.
Appendix C: ERROR CODES & TROUBLESHOOTING (Continued)
Pressure sensor will not zero.
Pressure sensor needs to be reset.
See Appendix F and follow the
instructions.
44
