Transmitting single pings
You can set up the ST90 to transmit a single ping only when you select the Transmission Mode button.
Context
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Use Transmission Mode to control how often the ST90 shall transmit its energy into the water. For normal use, choose Maximum. If you choose Maximum, the ST90 will transmit (ping) continuously and as often as possible.
If you choose Single Ping, you can transmit single pings by selecting the ping symbol on the right side of the button.
Procedure
1 Open the Operation menu.
2 Set Operation to Normal.
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3 Set Transmission Mode to Single Ping.
4 Select the ping symbol on the right side of the button to transmit one single ping.