Parks Medical Electronics, Inc.
   
 

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MAINTENANCE
SETTING THE DOPPLER ZERO CROSSERS

WARNING: ONLY perform this procedure if directed to do so by Technical Support!

  • Connect dry probe and turn on (4 / 8) MHz doppler
  • Select 28 Hz output filter
  • Set CH A size at maximum
  • Turn volume up to monitor background noise
  • With probe still dry (no gel), no noise except smooth white noise, look for the output shown on the strip chart at the bottom of this page. Adjust VR1 and VR2 as necessary to approximate it

 


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