Mindray WATO EX-55Pro, Service Manual

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4.11.6.2 O2 Concentration Test
21% O2 concentration test:
1. Put the O2 sensor unit with O2 sensor in the air.
2. Observe the display value of O2 concentration on the screen; confirm it is within the
range of 21% to 24%.
100% O2 concentration test:
1. Set the O2 flow to 8L/min, and press O2 Flush button, to make the circuit to fill with
100% O2 as soon as possible.
2. Observe the display value of O2 concentration on the screen; confirm it is within the
range of 97% to 100%. Turn off O2 flow.
4.11.7 Bypass Function Test
1. Hold and pull up the rotary handle for 90 degrees.
2. Turn the rotary handle for 90 degrees anticlockwise.
3. Pull off the CO2 absorbent canister from the lifting device.
4. Observe the bottom of the lifting device. If it is BYPASS configuration, power on the
anesthesia machine for one (1) minute, and the anesthesia machine can work normally.
NOTE

For the connections between CO2 absorbent canister and lifting device of two
configurations are different, see the following figure 1 and figure 2.

For two Circuits, with BYPASS and without BYPASS, see the following figure 3
and figure 4.

Circuit (115-009078-00) is configured with BYPASS. It is no need to check.
Figure 1 Figure 2
Rotary handle
: turn it
for 90
degrees anticlockwise to loosen
CO2 absorbent canister
Circuit
(
115-009078-00),
turn the L level clockwise
to loosen CO2 absorbent
canister