Test Products International 712 - Manual (Page 38)

Appendix G: MANUALLY INITIALIZING SENSORS
Manually Initializing the Carbon Monoxide and Oxygen Sensors
If the CO or O2 sensor fails to initialize, this procedure can be performed to
try and manually initialize the sensor(s).
WARNING : Changing parameters in field calibration mode can adversely
affect the operation of your analyzer. Follow the instructions carefully.
1. 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 Scroll/Enter Key. After the
10 second countdown is complete press the Scroll/Enter Key twice.
7. 712 Display: ‘20.9%’, ‘o2’, ‘rEF’. Action : Press the Scroll/Enter Key. After the
10 second countdown is complete press the Scroll/Enter Key twice.
8. 712 Display: ‘0.0mbar’, ‘0.0’, ‘oFS’. Action : Press the Func Key to bypass.
9. 712 Display: ‘2000’, ‘A-r’, ‘SEt’. Action : Press the Func Key to bypass.
10. 712 Display: ‘Auto’, ‘oFF’, ‘En’. Action : Press the Func Key to bypass.
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
If the 712 continues to fail to automatically initialize or this procedure fails
to initialize the sensors, return your analyzer to Test Products
International.
Notes: