Breas PV 101+, Руководство по обслуживанию

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CALIBRATION INSTRUCTIONS PV 101+/PV 102+ Service Manual
4–2 BREAS MEDICAL Doc. No. 003259 En Issue: X-1
4.3 Calibrating the pressure sensor
1 Start the PV 101+/PV 102+ device by pressing the I/O button and the + button at
the same time.
2 Remove the casing (see section 3.2). Keep the CPU board connected to the MDA
board.
3 Use the voltmeter to measure the voltage on pin 9 on the analogue/digital output
connector on the rear panel of the PV 101+/PV 102+.
4 Adjust the screw on the P203 (Offset) potentiometer on the MDA board until the
voltage is 1V.
5 Connect the pressure gauge to the syringe and the y-piece tube. Remove the
black tube from the pressure sensor on the MDA board. Connect the free end of
the y-piece tube to the pressure sensor.
6 Use the syringe to create a pressure of 30 mbar ±0.5 mbar.
7 Adjust the screw on the P204 (Gain) potentiometer on the MDA board until the
voltage is 4
V.
8 Remove the y-piece tube from the MDA board’s pressure sensor and reconnect
the black tube.
9 Repeat step 4 to 8 until no further adjustment is necessary.
10 Remove the equipment. Continue with the pressure verification procedure (see
section 4.4).
P203
P204
Pressure
sensor
P203 Offset
+
_
P204 Gain
+
_
MDA board