Schiller AT-2 Spiro, AT-102 Spiro Maintenance

Changing the Mouthpiece on Flow Sensor SP-250

The disposable mouthpiece of the SP-250 is designed for one-time use to eliminate the danger of cross
contamination - do not use the mouthpiece for more than one patient.

1. Remove the disposable mouthpiece by pulling it away from the handle.

2. Discard the complete mouthpiece.

3. Position the new disposable mouthpiece (Part No. 2.100077), and gently but
firmly click it in position.

Note: The disposable mouthpiece can only be positioned in one direction and no force is

necessary to insert it on the handle. Ensure that the orientation is correct by checking
the guide protrusion on the sensor against the guide slot in the handle

Changing the Filter on Flow Sensor SP-260

Change the filter and sterilise the mouthpiece after every patient to eliminate the danger of cross
contamination - do not use the filter for more than one patient.

1. Remove the mouthpiece by gently twisting and sliding it away from the handle.

The mouthpiece can only be removed in one direction.

2. Unscrew the mouthpiece and discard the filter.

3. Thoroughly disinfect the two halves of the mouthpiece. Use hospital grade

disinfectant for sterilising.

4. Position a new filter (Part No. 2.100123) in the threaded half of the mouthpiece as

shown.

5. Screw the two halves of the mouthpiece together. Ensure the filter is firmly held

with no air gaps.

6. Insert the mouthpiece in the handle.

Note: The mouthpiece can only be positioned in one direction. A moulded lip in the

mouthpiece prevents incorrect insertion.

SP-250/SP260 Instruction and
AT-2plus Spiro and AT-102 calibration

SCHILLER AG 2002; Art. No. 2. 510 338c

Maintenance

Cleaning the Sensor Handle.

Disconnect the sensor from the unit before cleaning.

Do not, under any circumstances, immerse the apparatus into a cleaning liquid or sterilize with hot water, steam, or air.

The casing of both sensors and cable assembly can be cleaned with a soft damp cloth on the surface only. Where necessary
a domestic non-caustic cleaner can be used for grease and finger marks. Sterilization, if required, should be done with gas
only and not with steam. To disinfect, wipe with hospital standard disinfectant.

Cable Care

Prevent the possibility of anyone stumbling over the cable; store and use with care.

To ensure cable longevity, prevent damage by people stepping on it or running the wheels of instrument carts over it.

Do not expose the sensor cable to excessive mechanical stress. Whenever disconnecting the cable, hold the plug and not the
cable.

SP-250/SP260 Instruction and
AT-2plus Spiro and AT-102 calibration

SCHILLER AG 2002; Art. No. 2. 510 338c

Calibration for AT-2plus Spiro

The unit must be calibrated with the first pulmonary function test of the day and
after every significant temperature change and after changing the sensor assembly.

Select the calibration menu option. The following screen is displayed:

Last calib. : 6.01.00
BTPS Factor : 1.090
Gain Factor : 1.002

ALT

then

25

8

>

Temperature : 70 oF
Measured volume : 0.00 l
Syringe Vol. : 3.00 l

Last Calibration date of last calibration

BTPS Factor calculated Body Temperature, Ambient Pressure, Saturated with water vapor value. This value compensates for the

difference in inhaled and exhaled humidity. The unit is set for measuring exhaled volume (100% humidity, Temp 36.8

this factor is applied when inhaled volume is measured. The unit uses the ambient temperature to calculate the BTPS factor.

This is sufficient for accurate FIVC calculation. The formula used is as follows:

BTPS = 0.033 +

Gain Factor calculated calibration factor between measured volume and actual volume.

Temperature ambient temperature in oF (or oC) dependent on device setting.

Measured Volume air volume measured by the system from the calibration pump.

Syringe Volume reference value of the entered air volume depending on the size of the calibration pump and the number of times

the air was pumped through the sensor; e.g. pumping 2 litres 3 times amounts to 6 litres (the recommended
volume with a 2 litre pump is 4 litres and with a 3 litre pump 3 litres).

Deviation : %

273.15 K + 36.8 °C Where: Tu is the ambient temperature in degrees centigrade

273.15 K + Tu °C 0.033 is the equivalent of 760mmHg at 22oC

273.15 Kelvin = 0o C

o

), and

Calibration Procedure

° Connect the calibration pump to the sensor. Ensure that there are no air leaks.

° In the screen above enter the ambient temperature and press ENTER.

° Press the AUTO PRINT key.

° Wait 1 second.

° Pump 3 to 4 litres of air through the sensor.

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.

° Enter the reference (syringe) volume of air (dependent on the size of the calibration pump and times of pumping).

° Press the ENTER key to accept.

° The message `Calibration Complete` appears on the display.

° Press the COPY key after calibration to obtain a printout of the calibration report with measurement details and time and

date of calibration.

If the message `EXCESSIVE DEVIATION CHANGE SCREEN` appears on the screen after a calibration, it indicates that the
difference between the measured volume and the entered volume is too great to perform an accurate calibration. Check the
temperature setting and the entered syringe volume. If these are correct change the disposable mouthpiece and recalibrate.

Before recalibrating, the stored calibration values must be reset: to do this press the `ALT` key then the `I` key.

If calibration is still not possible, or for any other questions please contact the SCHILLER service department

SP-250/SP260 Instruction and
AT-2plus Spiro and AT-102 calibration

SCHILLER AG 2002; Art. No. 2. 510 338c