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E.3.2 SETUP
1Fill the humidification chamber with water and slide on to the heaterbase.
2If a gas supply is used, set to 2- 10 l/minute, if no gas supply used, the breathing tube should be supported from the patient end so that it drops vertically over its entire length to the top of the chamber.
3Insert the middle sensor of the temperature probe into the connector on top of the chamber , and the end sensor of the temperature probe into the connector at the end of the breathing tube, plug the temperature probe plug in to the humidifier.
E.3.3 DYNAMIC TEST PROCEDURE (MR480)
1Turn the humidifier on.
2Turn Temperature Set control to 31.0 ± 0.1 °C, check that correct setting flashes on display after adjustment.
The airway circuit under the low flow conditions of the test will warm up only slowly and may give a low temperature alarm. If this is muted the circuit will eventually warm up and start controlling.
3Check after one hour that digital display is 31.0 ± 1.0 °C.
If temperature is still outside these limits leave the test going for a further 15 minutes.
4If displayed temperature is within 31.0 ± 1.0 °C, press chamber temp button and check chamber temperature is 35 to 66 °C.
5In Engineering menu (appendix A2) check:
hp (heaterplate temperature) > 36 °C Set = 31.0 ± 0.1°C
6Check that disconnecting the temperature probe gives an audio alarm and Temp Probe LED flashes.
7Press Mute button and check the alarm is silenced.
8If the Humidifier passes these tests it is controlling correctly and can be returned to use.
Ref. 185040646 MR730/720/700/480 Technical Manual ¯ Revision F ¯ Issued March 2001
