Measure Actual Turbine Speed (T/S) - CareFusion LTV 1200 Service Manual

Measure Actual Turbine Speed (T/S)

1) Enter the SERVO menu. Run the ventilator in Servo mode at default settings (flow 10 and
turbine speed 4000) for a minimum of one minute to stabilize turbine speed.
2) Set up a multimeter to measure frequency. Connect the meter test leads as follows:

black lead to the meter COM connection

red lead to the meter V connection.
3) Set the meter selector to Voltage (alternating or DC) and change to a frequency
measurement (Hz).
4) Connect the black meter test lead to chassis ground on the ventilator. Touch the red
meter test lead to PIN 15 of connector J5 on the Motor PCBA as shown below.
5) Allow the value to stabilize then read the meter-displayed value for frequency.
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LTV 1200, 1150, and 1100 Ventilator Service Manual p/n 18603-001, Rev. J