Calibration
General maintenance
1.
Turn BreathCO on, allow display to stablize, then adjust to 0 if needed.
2.
Connect the gas to the Sampling-T.
3.
Let the gas flow slowly (approx. 0.5 ltr/min) through the Sampling-T into the instrument. When
using the Vitalograph Calibration Kit the regulator is pre-set to 5psi.
4.
Once the displayed value stops increasing, it should be within ± 5% of the gas concentration.
(i.e. 48-52).
5.
If the instrument does not display a reading within the specifications, slowly adjust
the “SPAN” recessed adjustment screw on the rear of the instrument, until the display
reads 50. (Be careful or you could damage it). If this cannot be achieved, the electrochemical
sensor in the product must be replaced. Please contact our technical support department if this
should occur.
6.
After calibration, disconnect the Sampling -T and allow the instrument to settle for 5 minutes.
Recheck the instrument zero. Re-adjust the zero if necessary, as detailed in the previous section.
A General maintenance and calibration should be performed on an annual basis. A calibration check
should be performed as required. The Sampling-T should be changed after approximately 50 tests
have been performed. A red LED on the front of the device will turn on to indicate low battery.
When replacing the battery be sure to use only alkaline batteries.
1.
Press down on panel marked ‘OPEN’ and slide cover in direction of arrow. Then gently lift
cover from the instrument.
2.
Remove and discard the old battery.
3.
Replace with a new battery of the correct type.
4.
Ensure that the connector is fitted correctly.
5.
Ensure the leads are tucked neatly away, before replacing battery compartment cover.
Note: When the device reaches it use-by-date a service is required to replace the sensor.
The use-by-date is specified as 2 years from the date of manufacture.
Failure to calibrate may result in incorrect readings.
Calibrate only in a well ventilated environment.
Ensure gas canister is secured prior to accuracy/calibration.
Note:
Follow steps 1-4 below to check accuracy and calibrate if required. The Vitalograph- BreathCO
is re-calibrated by exposing it to a gas of known concentration. (BreathCO Calibration Gas Cat.
No. 29506). This is usually 50ppm/μL/L CO.
