Advanced Fio 2 Diagnostic Procedures (Ltv ® 1200 Only) - CareFusion LTV 1200 Service Manual

Advanced FiO Diagnostic Procedures (LTV
2
Delivery of the correct percentage of oxygen (FiO
oxygen pressure transducer, flow valve and O
perform the following diagnostic procedures.
When instructed to replace a subassembly or component that fails any of the following
checks, verify the original problem is resolved once the item has been replaced. If the
original problem is not resolved, continue with the Advanced Diagnostic checks in order.
Oxygen Transducer Checkout
Perform a Leak test as follows:
1) Apply a switchable 50 PSIG O
meter in circuit.
2) Switch off the O
2
 If the pressure drop is greater than 1 PSI, check the Pisco connector and the thin,
high-pressure tubing for damage or leaks and replace any damaged components.
Perform a Calibration Check as follows:
1) Power the unit up in VENT CHECK and select RT XDCR DATA, O2.
2) With the inlet open to ambient, verify the readout is ± 0.5 PSI.
3) With 50 PSI applied to the inlet, verify the readout is 50 ± 1.0 PSI.
4) If either step fails, recalibrate the transducer and repeat the test. If the test still fails, the
oxygen transducer or associated electronics may be faulty and the analog PCBA should
be replaced. See Analog Board Assembly in Chapter 8 for instructions.
Flow Valve Checkout
1) In VENT MTNCE, SERVO mode, check the output flow using the settings in the
following table.
Flow and speed
settings
10 Lpm - 4000 RPM
10 Lpm - 5000 RPM
50 Lpm - 4000 RPM
90 Lpm - 7000 RPM
p/n 18603-001, Rev. J
source to the oxygen inlet with a calibrated pressure
2
source and monitor the pressure for 1 minute.
Acceptable output
flow range
9.5 to 10.5 Lpm
9.5 to 10.5 Lpm
42.5 to 57.5 Lpm
76.5 to 103.5 Lpm
®
LTV 1200, 1150, and 1100 Ventilator Service Manual
1200 Only)
®
) is dependent on correct calibration of the
2
blender. If the FiO
2
Recalibrate flow valve if
flow output variance is;
>7.0 but < 9.5 Lpm
or
>10.5 but <13.0 Lpm
>7.0 but < 9.5 Lpm
or
>10.5 but <13.0 Lpm
>35.0 but < 42.5 Lpm
or
>57.5 but <65.0 Lpm
>63.0 but < 76.5 Lpm
or
>103.5 but <117.0 Lpm
appears incorrect,
2
Replace flow valve if
Flow Output Variance is;
<7.0 or >13.0
<7.0 or >13.0
<35.0 or >65.0
<63.0 or >117.0
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