9
(continued on page 8)
OPERA TION AND USE continued from page 8
10
7. For models with the optional Air-Free CO calculation, the
data will appear on the LCD in the form of PPM next to the “CF”
designator. This calculation will only be presented when the
oxygen level has dropped to 18.9% or less while sampling flue
gas emissions.
NOTE: Air Free CO levels or CF readings are calculated by the
instrument based on CO and O2 levels detected during flue gas
sampling.
8. To disable or enable the audible alarm, press and release
the POWER/MUTE BUTTON (A) .
9. T o save any displayed readings, press and release the SA VE/
ZERO BUTTON (C). The data saved can be viewed or downloaded later. Printout s are possible using the optional IR printer
(#AJN02021). See Menu operation for complete instructions.
10. When used in low light conditions, an automatic backlight
will illuminate the display .
11. T o turn the instrument off, press and hold the POWER/MUTE
BUTTON (A) for approximately 5 seconds until “Power Down”
appears on the display .
To verify the accuracy of Sensit®CO, it must be exposed to a
known concentration of test gas that will test any sensor combination included in your particular model.
Any sensor that does not meet the specifications listed in this
manual may require calibration or repair. A calibration check
does not update the calibration due date. Full calibration is
required to update these times.
A calibration past due message will appear during warm-up if
calibration has not been performed per your instrument setting.
Anytime it is suspected the Sensit®CO is not working properly,
check calibration.
CALIBRA TION CHECK
CARBON MONOXIDE SYMPTOM CHART
Level (ppm) Effects
0 Desired level
9 Acceptable level in a living space*
50 Maximum concentration for
continuous exposure in any 8 hour period
400 Frontal headaches in 1 to 2 hours, life
threatening after 3 hours
800 Nausea and convulsions, death within 2 hr.
1,600 Nausea within 20 min., death within 1 hr. **
12,800 Death within 1-3 minutes**
* Always consider outdoor ambient conditions
** Health effects can vary significantly based on age,
sex, weight and overall health.