EDAN SONOTRAX Basic User Manual - 3.4 Switching On

SONOTRAX Series Ultrasonic Pocket Doppler User Manual                              Examining 

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Replace it with a new probe: 

Put the USB socket of new probe into the probe interface of the Doppler. 

NOTE: 

Place the temporarily unused probe carefully and avoid falling off, splash or stress, etc. 

When the Doppler is not used for a long time, it’s recommended to connect the probe to 

the Doppler and keep them safely in the package. 

3.4 Switching on 

Press the POWER button on the front panel to switch on the Doppler. 

If the probe is not connected or poorly connected, the LCD display a flashing “--- MHz” sign. 

You should reconnect the probe properly. 

When the probe is well connected, the LCD stops flashing and shows the probe 

frequency in the bottom right corner. 

3.5 Selecting Work Mode 

The Doppler has four work modes. They are: 

Mode 1: Real-time FHR Display Mode 

Mode 2: Averaged FHR Display Mode 

Mode 3: Manual Counting Mode 

Mode 4: Backlight Brightness Setting Mode 

Press the 

  button on the left panel, the doppler work mode switches 

among these modes, and the work mode is shown in the top left corner of LCD. 

When the doppler is swiched on, it enters mode 1 automatically. 

3.6 Enabling or Disabling Backlight 

SONOTRAX Basic A, SONOTRAX Pro, SONOTRAX II and SONOTRAX II Pro have 

backlight. You can enable or disable it. 

Keep pressing the 

  button until the working mode on LCD displays 4. Press the 

button. The backlight is enabled when the LCD reads “ON”, and it is disabled when the LCD 

reads “OFF”. 

The setting in this mode is saved automatically after the mode is changed or normal power-off.