3
Functional Testing
3.1
BD4000, BD4002 Main Unit
Switch the unit on by pressing the on/off switch at the back of the unit to the “on”
position(
I
).
The
Baby Dopplex
displays will illuminate and you will hear a click from the
loudspeaker. The message “Huntleigh Diagnostics” appears for an instant while the
unit carries out a self-test.
Inspect the transducer cables and plugs for signs of damage and physical condition of
the transducers.
The ultrasound transducer face should be free from marks and the toco boot
undamaged. Remove any gel from the transducers if present.
Open printer tray, unit should display “Paper tray open” and remove paper pack.
Close paper tray, unit should display “End of paper”. Refit paper pack ensuring that the
shiny side is uppermost. This sensitive side can be easily marked with a fingernail.
Plug in the ultrasound, toco and event marker transducers, set the printer to 3cm/minute
(menu option) and start the unit printing.
Press the patient event marker switch and observe the arrow at the bottom of the
printout.
Press the clinical event marker on the display panel and an arrow should appear at the
top of the printout.
Increase the volume using the up/down controls on the front panel and flex cable on the
ultrasound transducer at the transducer and plug ends checking that no crackling is
heard.
Replace the ultrasound transducer with the FECG leg plate. The unit should fast feed
for a few seconds if the printer is still running when the ultrasound transducer is
removed, and then continue printing.
Ensure that the FECG text appears at the bottom of the FHR scale on the trace.
3.2
Ultrasound Transducers
Reconnect the ultrasound transducer and input a signal by placing it in the palm of the
hand and stroke the back of the hand approximately twice per second.
The display should indicate a rate of around 120 BPM after a few seconds. Continue
this for one minute and check for a corresponding line on the fetal heart rate trace.
F
Too strong a signal from an adult heart can overload the unit and
result in false counting.
Issue: 2 DRAFT
7
Rev: a
614365
