Fisher & Paykel MR810 Manuale Utente

 

MR810 Technical Manual Revision C  REF 185042601

 

33 

 

1.  Connect the MR810 as for normal operation (refer to § 3).  Make sure the airway probe port is capped. 

2.  Check the thermometer for air bubbles in the red alcohol, and discard if any are present.  Fully insert 

the supplied thermometer into the chamber temperature probe port. 

3.  Adjust the gas source to 10 

±

 2 L/min. 

4.  Turn on the MR810 and set to the Medium setting, and check that the heater-wire indicator is on. 

5.  Allow the humidifier to stabilise for at least one (1) hour. 

6.  Check the thermometer temperature reading is within the range 29 to 35 °C.  If not, leave the MR810 

for another half-hour then recheck.  After rechecking, the unit fails the test if still outside the 
temperature range.  Consult § 5 (Troubleshooting). 

7.  Now remove the thermometer and cap the temperature probe port.  Insert the thermometer fully into the 

airway probe port. 

8.  After five (5) minutes note the thermometer temperature.  If the temperature is within the range 29 to 

35 °C, the unit passes the test.  If not, leave the unit for half an hour then repeat the test.  The unit fails 
if it is still outside the specified temperature range.  Consult § 5 (Troubleshooting). 

•

 

Perform this check if the MR810 is used with non heater-wire circuits. 

•

 

The test should be conducted in an ambient temperature of 23 

±

 2 °C with no drafts. 

•

 

Allow approximately 30 minutes to complete the test. 

1.  MR810 humidifier to be tested. 

2.  MR250 chamber filled with water. (Note: the MR290 chamber is difficult to use for this test because of 

the floats). 

3.  Accurate glass thermometer (do not use the 900MR033 thermometer). 

1.  Set up the humidifier with the MR250 chamber, filled with water to the maximum water level.  This 

test does not require the use of a breathing circuit, nor is a gas flow required.  

2.  Ensure that the heater-wire adaptor is not connected, and that the heater-wire indicator remains off. 

3.  Select the medium setting and wait for 30 minutes to allow the water temperature to stabilise. 

4.  After 30 minutes stir the water in the chamber to mix it thoroughly.  Record the water temperature 

using an accurate thermometer.  Make sure the thermometer is not resting on the chamber base when 
taking the reading, as this will give an inaccurate measurement. 

5.  The thermometer must read between 55 and 60 °C.  If it does not, recheck the temperature ten (10) 

minutes later (stir the water before checking).  The unit fails the test if the temperature is still outside 
the limits. Consult § 5 (Troubleshooting).