Warnings And Cautions; Calibration Procedures; Equipment Required; Software Calibration Buttons - ResMed VPAP III, VPAP III ST, VPAP III ST-A Service Manual

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Calibration procedures

All calibration procedures should be carried out whenever the Main PCB or blower has been
replaced.

Warnings and cautions

Warning
Incorrect connection of mains voltage can result in dangerous voltages being present on
the equipment chassis.
!
Incorrect orientation of leads and plugs during reassembly can lead to equipment damage
upon power-up.
While the VPAP III uses an isolated power supply, it is recommended that isolation
transformers are used for added safety while working with the cases opened up and power
switched on.
Note: Always wait at least 10 seconds after the mains power is switched off before
switching it on again. This allows the capacitors in the power supply to discharge.
Any abnormal resonance, noise or vibration of the unit must be investigated before
the unit is returned to the owner.

Equipment required

• ResMed Spirit 2.1 Service Software (30967) or available in service software kit 30966, which
includes null modem cable, oxygen sideport connector, closed bubble cushion, standard mask
frame and security key.
Note: Instructions for installing the Spirit 2.1 Service Software can be found in
• Calibrated manometer (0 - 30 cm H 2 O range)
• Calibrated flow meter with flow regulation valve
Note: The flow meter must be capable of measuring air flows ranging from
• 2 metre air hose
• A computer running Windows NT 4.0, 2000 or XP
• Note: There is only partial support for the VPAP III ST-A on a computer running Window NT
4.0. Some command settings will not be available.

Software calibration buttons

Pressure calibration
Flow calibration
Motor noise calibration
56 VPAP® III, VPAP III ST, VPAP III ST-A Service Manual
Appendix C: Installing the service software.
0 to 150 L/min with an accuracy of 3% or better over this range.