Fluke Biomedical VT Plus HF - Manual (Page 83)

Operation
Special Functions
3
3-33
To run the HFO test:
1. Press the
START or AUTO soft key to begin the test. The START soft key runs the
test once, while the AUTO soft key starts the HFO test in automatic mode. In
automatic mode the HFO test is run every 15 seconds.
2. If in automatic mode, press the STOP soft key to end the test.