VIII.
M A I N T E N A N C E A N D S E R V I C E - C O N T .
56
a.
Using a length of tubing, connect the blue fitting on the back of the Crossvent to a low flow test standard and
turn on the Crossvent.
b.
Press SETUP and then CAL MENU. Activate VALVES.
c.
Turn ON valves A, D1 and D3, and set a flow of 10 LPM (if the flows are not calibrated, then set this using a
test instrument).
d.
Check for a flow of 40- 60 ml/min coming from the fitting.
e.
Move the tubing connection from the other pneumotach fitting and check for the same flow.
IF IT FAILS THE ABOVE TEST, CALIBRATE AS FOLLOWS:
f. Set up as in a - c.
g. Adjust the Distal Variable Resistor (132) to obtain 40 - 60 ml/M.
h. Adjust the Proximal Flush Variable Resistor (132) to obtain 40 - 60 ml/M.
12. BASE FLOW – 2 to 3 LPM
TO TEST:
a. Connect the Patient Connector on the back of the CV-2i+ to a low flow test instrument using a single length
of tubing.
b. Set the PIP to maximum.
c.
In the Calibration menu, activate valves, and turn on valve E.
d. Verify the flow to be 2 - 3 LPM.
IF IT FAILS THE ABOVE TEST, CALIBRATE AS FOLLOWS:
e. Set up the same as in steps a - c.
f. Adjust the Base Flow variable resistor (153) to obtain 2 - 3 lpm.
13. 2-WAY RELIEF VALVE - 96 cmH2O
(perform first - 5, 6)
TO TEST:
a. Connect the Patient Connector on the back of the CV-2i+ to a low pressure test instrument using a single
length of tubing.
b. Occlude the opening of the D.A.R.V..
c. In the Calibration menu, activate valves, and turn on valve A.
d. Starting with the valve fully CCW, turn the L/min (Flow) Knob fully CW while observing the test instrument.
The pressure should be no less than 64 cmH
2
O with 2 LPM and no greater than 96 cmH
2
O with 15 LPM.
IF IT FAILS THE ABOVE TEST, CALIBRATE AS FOLLOWS:
e. Set up the same as in steps a - c.
f. Turn off valve A and remove the Relief Valve (128).
g. From the top of the valve, hold the poppet in the center of the valve from turning with your finger. From the
bottom, adjust the tension on the spring to obtain pressure in step d by turning the spoked spring seat. Turn
CCW if pressure is too high and CW if too low.
h. Reinstall and test.
14. FLOW
(perform first - 5, 6, 7, 8, 9)
NOTE: If this Crossvent is used with an air/oxygen blender, then verify flow using a 60% O2 gas
supply making certain that the pressure to the CV-2i+ inlet remains 17-55 psi (117-380 kPa) at all
times. If used only with 100% oxygen, then use that.
TO TEST:
a.
Connect a patient circuit to the Crossvent as illustrated.
b.
Turn PIP and PEEP on fully, making certain that the proximal airway pressure line is connected.
TO TEST
INSTRUMENT