8PERFORMANCE TEST PROCEDURE

8.1INTRODUCTION

This section outlines the performance testing required for the MR810 as part of the annual maintenance or after servicing of the humidifier.

If the MR810 is intended to be used with a heated wire circuit, perform the functional check (§ 8.2) and the Heater-wire Mode Performance check (§ 8.3).

If the MR810 is intended to be used with a non heated circuit, perform the functional check (§ 8.2) and the non Heater-wire Mode Performance check (§ 8.4).

8.2FUNCTIONAL CHECK

Check the function of the humidifier buttons and indicators as follows, allow two minutes to complete the test:

1.Apply power to the unit under test; as power is applied check that the "See Manual" indicator flashes briefly.

2.Check the operation of the power button. Replace if necessary (refer to § 6.7).

3.Turn the device on. Press the Temperature Setting button and cycle through all three settings of the humidifier. If pressing the Temperature Setting button has no effect, check the button seating, and replace if necessary. (Refer to § 6.7).

4.Using a Fisher & Paykel Healthcare compatible heated breathing circuit (such as an RT202), check that the LED in the heater-wire adaptor illuminates when plugged into the circuit. If the heater-wire indicator remains off, consult § 5 (Troubleshooting).

8.3HEATER-WIRE MODE PERFORMANCE CHECK

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Conduct this check if the MR810 is used with heated breathing circuits.

 

•The following test should be performed with either the RT202 kit (using the included MR290 chamber), or the MR370 chamber and CR140 reusable circuit kit. Other chambers or circuits will give different results.

•The test should be conducted in an ambient temperature of 23 ± 2 °C with no drafts. Do not conduct the test with a hot heater plate as this can affect the accuracy of the test. Allow the MR810 to cool before starting.

•Turning the device on/off, changing temperature settings, changing the gas flow, or disconnecting the heater-wire will require the test to be restarted.

•Allow 1 to 2 hours to complete the test.

8.3.1EQUIPMENT REQUIRED

1.MR810 humidifier to be tested.

2.Single-use: RT202 single use breathing circuit or similar.

Reusable: CR900 reusable heater-wire elbow with 1.5m reusable tubing (CR140 kit).

3.Single-use: MR290 chamber filled with water (included in RT202 kit).

Reusable: MR370 reusable chamber filled to maximum water line.

4.Constant dry gas source of 10 ± 2 l/min.

5.Fisher & Paykel Healthcare Thermometer, part no 900MR033.

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MR810 Technical Manual Rev C REF 185042601