Siemens KION Service Manual page 79

KION / KION-i
Expiratory flow transducer calibration
The expiratory flow transducer is located in the
patient cassette and the preamplifier on PC 1750
T . Adjustment of the pre-amplification (E2-
RANSDUCER
potentiometers) is performed by MEA.
During calibration, the signals are routed via the CAN
bus and the I2C bus.
CON MEA
Calibration
CAL
I2C-bus
Calibration
acknowledge
Offset calibration
1. The gas supply from the gas modules are cut-off
and there is no gas flow in the system during
offset calibration of the expiratory gas flow
transducer.
2. The expiratory flow transducers E2-
potentiometers are adjusted during calibration
until the measured flow is close to zero.
3. The Tidal Volume display shows the value: 0.
4. The Exp. Tidal Volume display shows the
measured flow, as a value counting downwards,
by the expiratory flow while calibrating
(in 1/10 ml/s).
E382 E392E 061 01 02 02
PC1750 Transducer
Transducer
signal
Siemens-Elema AB
Gain calibration
5. CON starts to simulate expirations at several
attempts with a duration time of 3 seconds
meanwhile a fresh gas flow of 14 l/m is
generated.
Target volume: 14 l/min x 3 s / 60 = 700 ml.
6. The expiratory flow transducers E2-
potentiometers are adjusted by MEA on every
attempt until the measured volume is close to
the target volume 700 ml. Between every
attempt the expiratory flow transducer is zeroed.
7. The Tidal Volume display shows the value: 700.
8. The Exp. Tidal Volume display shows, after each
attempt, the measured volume by the expiratory
flow transducer (in ml).
9. The adjustment of the E2-potentiometers is
completed when the expiratory flow transducer
output value is ±1% of the target volume.
10. The calibration is interrupted after 14 attempts
and if the calculated volume is not close to target
volume, the test will Fail, see Note 1.
Note 1:The result of the calibration is shown on the
KION Monitor as Pass or Fail. Fail means that either
or both of the fresh gas flow transducer or expiratory
flow transducer calibration failed.
Diagnostic (271) will be shown in the Diagnostic Log
and the CPS/IDS Diagnostic Log if the expiratory flow
transducer calibration failed.
Service procedures
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