Mindray WATO EX-65Pro - BFCS Function Tests; Checking Switchover between the EFCS and BFCS

4-8
NOTE
 For Alicat, read the mass flow, that is, SLPM value.
 A systematic deviation exists between the test value obtained using Alicat and the
full electronic flowmeter control value. Therefore, the actual acceptance criterion is
the set value divided by 0.983.
 When the flow is set to 0.2 L/min and 1 L/min, the 2 L-range Alicat should be used.
Measure the concentration of the mixed gas and O2 in total flow control mode.
Test Item Testing Method
O2 Concentration
(Using PF-300)
O2/Air mixture accuracy
(Balance gas setting: air)
Adjust the O2 concentration knob to set O2
concentration to 21%.
Adjust the total flow knob to set the total flow to
10 L/min.
21%~26%
Adjust the O2 concentration knob to set O2
concentration to 100%.
Adjust the total flow knob to set the total flow to
10 L/min.
95%~100%
Adjust the O2 concentration knob to set O2
concentration to 35%.
Adjust the total flow knob to set the total flow to
18 L/min.
35%±5%
Adjust the O2 concentration knob to set O2
concentration to 86%.
Adjust the total flow knob to set the total flow to
18 L/min.
86%±5%
O2/N2O mixture
accuracy (Balance gas
setting: N2O)
Adjust the O2 concentration knob to set O2
concentration to 26%.
Adjust the total flow knob to set the total flow to
10 L/min.
26±5%
Adjust the O2 concentration knob to set O2
concentration to 100%.
Adjust the total flow knob to set the total flow to
10 L/min.
95%~100%
Adjust the O2 concentration knob to set O2
concentration to 34%.
Adjust the total flow knob to set the total flow to
18 L/min.
34%±5%
Adjust the O2 concentration knob to set O2
concentration to 83%.
Adjust the total flow knob to set the total flow to
18 L/min.
83%±5%
4.7 BFCS Function Tests
4.7.1 Checking Switchover Between the EFCS and BFCS
When the system is powered on, press the emergency button in the EFCS state. Ensure that the
BFCS is automatically deployed and an alarm "Backup Flow Control is enabled" is reported.
Click Disable Backup Flow Control in the lower left corner of the screen. Disable the BFCS
when the needle valve is turned off.
The backlight of the backup O2 flowmeter should be lit on when the BFCS is deployed. The
backlight should be extinguished after the BFCS is retracted.