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Ref. 185040646 MR730/720/700/480 Technical Manual ¯ Revision F ¯ Issued March 2001
6.0 PERFORMANCE CHECK_______________________________________
6.1 INTRODUCTION
This procedure should be used to check the operation and calibration of the MR730/720/700/480. This performance
check should be performed after any servicing, and annually as part of the routine maintenance procedure (see
Appendix B).
Performance can be monitored during the test by using the functions of the Engineering Menu. See Appendix A2.
If there is a desire to confirm the full dynamic operation of the Humidifier, such as after servicing, a full test of the
temperature control of the Humidifier may be performed, see tests detailed in Addendix E.
6.2 PERFORMANCE CHECK MR730/720/700
6.2.1 EQUIPMENT SETUP NOTES:
♦ 34.5 °C and 41°C test probes, available in MR700 series calibration kit (Fisher & Paykel part no. 900MR548).
♦ Α heated wire breathing circuit of any length, single use or reusable.( If a single use circuit is used, ensure there is a
gas flow through it of at least 2 l/minute to prevent overheating of the circuit.)
♦ Heater wire adaptor for connection to a MR700 series humidifier
♦ A Humidification Chamber filled with water to recommended level (water at room temperature.)
♦ A temperature probe is not used in the circuit in this test.
6.2.2 SETUP
1 Connect the heated circuit to the humidifier , ensure the circuit is not covered to prevent overheating of the
tubing. Remember there must be an airflow of at least 2 l/min for single use circuits.
2 Plug in the 34.5 °C test probe to the humidifier.
3 Slide the humidification chamber on to the humidifier.
4 Plug in the humidifier and turn the power on. For the MR720 and MR730, ensure the heater wire switch is ‘on’
(heater wire LED will light).
6.2.3 TEMPERATURE CONTROL CHECK MR700/720/730
1 Turn the Temperature Control knob to 33.0 ± 0.2 °C and Chamber Control to 0. (Note the Temperature Control
and Chamber Control settings will be displayed as the control knobs are adjusted.
2 Check the display reads 34.5 ± 0.2 °C and that the ‘Set Low’ warning light is on (units with version 3 software
only).
3 Push the Chamber temp. button and check for a 34.5 ± 0.2 °C reading on the temperature display.
4 Run for 5 minutes without interruption.
5 After 5 minutes Check:
Heaterplate is warm or cold.(Less than 60 °C , see ‘hP’ in the engineering menu).
Heater Wire cold (feel the wire or circuit, should be cold to touch).
6 Turn the Temperature Control knob to 36.0 ± 0.2 °C and leave Chamber Control set at 0.
7 Run for at least 20 minutes without interruption.
8 After 20 minutes Check:
Heaterplate hot (Greater than 80 °C, see ‘hP’ in the engineering menu.
Heater Wire hot (feel the wire or circuit, should be warm to touch).
CAUTION: THE WATER IN THE CHAMBER MAY BE NEAR BOILING AT THIS STAGE