EDAN SONOTRAX Basic User Manual - page 21
SONOTRAX Series Ultrasonic Pocket Doppler User Manual Operation
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3.5.1 Real-time FHR Display Mode (Mode 1)
When the Doppler works in this mode, the working mode on LCD displays 1.
As soon as a fetal heart signal is detected, the heart shape on LCD flashes and the FHR display
area displays the real-time FHR value.
3.5.2 Averaged FHR Display Mode (Mode 2)
Keep pressing the MODE button until the working mode on LCD displays 2.
The heart shape on LCD flashes when fetal heart signal is detected, and the FHR value indicates
the average value of every eight beats.
3.5.3 Manual Mode (Mode 3)
Keep pressing the MODE button until the working mode on LCD displays 3.
Press the START/STOP button once and start counting immediately, viz. count one at the
moment when the button is pressed. The LCD displays the flashing heart shape symbol and “---”.
Press the button again on the 10
th
count (after nine beat intervals).
The Doppler automatically calculates and displays the average FHR over the 10 beats. This rate
value will not disappear until another measurement starts or the mode is changed.
3.5.4 Backlight Brightness Setting Mode (Mode 4)
This mode is only available with SONOTRAX Basic A, SONOTRAX Pro, SONOTRAX II
and SONOTRAX II Pro.
Keep pressing the MODE button until the working mode on LCD displays 4.
Press the START/STOP button to disable or enable the backlight. “OFF” displayed on the LCD
means the backlight is disabled, while “ON” means the backlight is enabled.
NOTE:
The setting in this mode will be saved automatically after mode change or normal power
off.
3.5.5 Record Sampling Frequency Setting Mode (Mode 5)
This mode is only available with SONOTRAX Pro and SONOTRAX II Pro.
Keep pressing the MODE button until the working mode on LCD displays 5.
Press the START/STOP button, the sampling frequency switches between 4 and 8 on the LCD.
“4” means the frequency is 4KHz, and the longest record time is 480 seconds; while “8” means
8KHz, and the longest record time is 240 seconds.