Nellcor NPB-75, Service Manual

Page: 52 / 71

10-1
SECTION 10: PERFORMANCE VERIFICATION
10.1 Flow System Leak Check
10.2 Performance Verification Procedure
The performance of the monitor must be verified after all service procedures. Perform all
procedures in this section to verify the correct functioning of the monitor.
10.1 FLOW SYSTEM LEAK CHECK
Perform the Flow System Leak Check after all service procedures
described in this manual.
10.1.1 Flow System Leak Check Procedure
1. Connect the vacuum manometer to the Leak Test Jig as shown in
Figure 10-1: Leak Test Jig Connection.
Figure 10-1: Leak Test Jig Connection
2. Open the Leak Test Jig clamp and empty the syringe’s contents.
3. Connect the open-ended tubing (as shown in Figure 10-1: Leak Test
Jig Connection) of the Leak Test Jig to the Gas Outlet of the
monitor.
4. Connect the other open-ended tubing of the Leak Test Jig to the
CO
2
input connector.
5. Pull out the syringe valve until the pressure drops (as displayed on
the vacuum manometer) to approximately -300 mBar
(or equivalent) and close the clamp.
6. Wait 30 seconds.
7. The change in reading should be less than 20 mBar (or equivalent).