AT-2plus User Guide Spirometry Supplement
Page 23
Art. No. 2. 510339wa ©1999
AT-2plus User Guide Spirometry Supplement
Page 23
Art. No. 2. 510339wa ©1999
Calibration
Calibration Procedure
To calibrate the unit proceed as follows:
°
Connect the calibration pump to the sensor. Ensure that there are no air leaks.
°
Press key '8' - the menu is displayed as shown on the previous page.
°
Enter the ambient temperature.
°
Enter the reference volume of air (depending on the size of the calibration pump and times of pumping; e.g. a 2 litre pump pumped
3 times = 6 litres).
°
Wait 1 second.
°
Click the start (auto) key
.
°
Pump 4 to 9 litres of air through the sensor (as set in reference volume).
Note: Make sure that the flow sensor is kept still during the pumping operation.
While pumping, the unit records the volume being pumped through the flow sensor and indicates it on the display.
°
Press the STOP key when finished pumping
.
°
The message‚ `Calibration OK` appears on the display,
If the message `EXCESSIVE DEVIATION!` or `CHANGE THE FILTER` appears on the screen after a calibration, it indicates that the
difference between the measured volume and the entered volume is too great (>25%). Check the temperature setting, the syringe
volume and the entered syringe volume. If these are all correct change the
disposible mouthpiece
and recalibrate.
Before recalibrating, the stored calibration values must be reset: to do this press the `ALT` and `I` keys.
Change the complete sensor assembly if calibration is still not possible and again press `ALT` and `I` before recalibrating.
Click the PRINT (copy) key to obtain a printout of the calibration report with measurement details, time and date of
calibration, and a graph of the flow.
Calibration
Calibration Procedure
To calibrate the unit proceed as follows:
°
Connect the calibration pump to the sensor. Ensure that there are no air leaks.
°
Press key '8' - the menu is displayed as shown on the previous page.
°
Enter the ambient temperature.
°
Enter the reference volume of air (depending on the size of the calibration pump and times of pumping; e.g. a 2 litre pump pumped
3 times = 6 litres).
°
Wait 1 second.
°
Click the start (auto) key
.
°
Pump 4 to 9 litres of air through the sensor (as set in reference volume).
Note: Make sure that the flow sensor is kept still during the pumping operation.
While pumping, the unit records the volume being pumped through the flow sensor and indicates it on the display.
°
Press the STOP key when finished pumping
.
°
The message‚ `Calibration OK` appears on the display,
If the message `EXCESSIVE DEVIATION!` or `CHANGE THE FILTER` appears on the screen after a calibration, it indicates that the
difference between the measured volume and the entered volume is too great (>25%). Check the temperature setting, the syringe
volume and the entered syringe volume. If these are all correct change the
disposible mouthpiece
and recalibrate.
Before recalibrating, the stored calibration values must be reset: to do this press the `ALT` and `I` keys.
Change the complete sensor assembly if calibration is still not possible and again press `ALT` and `I` before recalibrating.
Click the PRINT (copy) key to obtain a printout of the calibration report with measurement details, time and date of
calibration, and a graph of the flow.
Summary of Contents for Schiller AT-2plus
Page 1: ...i i AT 2plus Spiro Option AT 2plus Spiro Option Schiller Menu Manuals...
Page 9: ...ix ix...
Page 10: ...x x...
