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Ref. 185040646 MR730/720/700/480 Technical Manual ¯ Revision F ¯ Issued March 2001
E.3.2 SETUP
1 Fill the humidification chamber with water and slide on to the heaterbase.
2 If 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.
3 Insert 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)
1 Turn the humidifier on.
2 Turn 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.
3 Check 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.
4 If displayed temperature is within 31.0 ± 1.0 °C, press chamber temp button and check chamber temperature is
35 to 66 °C.
5 In Engineering menu (appendix A2) check:
hp (heaterplate temperature) > 36 °C
Set = 31.0 ± 0.1°C
6 Check that disconnecting the temperature probe gives an audio alarm and Temp Probe LED flashes.
7 Press Mute button and check the alarm is silenced.
8 If the Humidifier passes these tests it is controlling correctly and can be returned to use.