(Model J) Page 115
17.5 Controller “Block and Leak” pressure sensor calibration
a) Connect the block and leak Y piece
assembly to the fresh gas port and
monitor generated pressure with
the calibration analyser.
Note: Step b) is to be carried out with new control/monitor boards only,
otherwise leave values as set and move to step c).
b) Enter Sensor Calibration screen and set the Block and
Leak Gain to 3336 and Offset to -220.
c) Return to the Jet Calibration screen.
d) Set up the ventilator to HFO pure mode . Check that Mean and Delta P
are set to zero and HFO rate is 3.00 Hz.
e) Adjust the restrictor to set a pressure of 140 mbar on the calibration analyser.
f) Adjust Block and Leak pressure sensor gain until the sensor reading and the
calibration analyser agree.
Acceptable tolerance: ± 1 mbar
g) Remove the tube from the fresh gas port and adjust the Block and Leak
pressure sensor offset until the sensor reading is zero.
Acceptable tolerance: ± 1 mbar
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