Datex-Ohmeda Anesthesia Delivery Unit S/5 Technical Reference Manual page 102

Datex-Ohmeda ADU
Step 18: N
The N
2
minimum O
Equipment needed:
Settings:
Test range:
Figure 50
1. Connect the monitor sampling line between the fresh gas outlet and the fresh gas hose.
2. Open the O
flow to the values listed below.
ADU O
Test device measured O
3. Turn the O
0.10 l/min.
4. Open O
5. Disconnect the N
and that the Air gas is automatically selected.
6. Reconnect the N
that the N
7. Close the flows.
5-44
O / O ratio control
2 2
O/O ratio control limits the N
2
concentration of 25%.
2
Calibrated gas monitor
Pipeline supplies gases connected.
Manual mode and APL valve in open position (=1.5 cmH
N O/Air switch in N
2
0-100%
N O / O2 Ratio Control test setup
2
flow with the flow control and turn the N
2
flow setting (l/min.)
2
2
flow slowly to zero. Check that the N
2
flow to approximately 1 l/min.
2
O pipeline supply gas and check that the alarm 'N
2
O Pipeline supply turn the N
2
O flow is returning.
2
O flow to a maximum of 75% of the total flow. This assures a
2
O position.
2
3.0
conc. (%)
22 - 28
O flow falls to zero when the O
2
O/Air switch to Air and then back to N
2
O flow control to fully open. Adjust the O
2
2.0 1.0 0.5
22 - 28 22 - 28 22 - 28
O Supply lost' is initiated
2
Document No. 8502852
O)
2
2
flow goes below
2
O. Verify
2