Speed data is wrong
Speed data displayed in Scala2 is wrong.
![](../oxy_ex-2/shared/img/iconeFleche.png)
- Check the units of measure.
- If they are in meter/second instead of knots, click .
- From the tab Units, from Speeds, select Knot.
![](../oxy_ex-2/shared/img/iconeFleche.png)
- Clean the EM log pins using Isopropyl alcohol or a Scotch-Brite scouring pad. Use EM log
cleaning pens supplied with the sensor to clean EM log pins (sensors with
a serial number from 4005076 and after).
- From Mosa2, check speed measures with the EM log tester (see Checking Speed Measures with EM Log Tester).
![](../oxy_ex-2/shared/img/iconeFleche.png)
- Check the sensor position on the trawl (see Installing Speed Sensors on the Trawl).
- From Mosa2, check that the pitch and roll are both between 5 and -5° when the sensor is laid flat.
- If speed data is still wrong, check speed measures with the EM log tester (see Checking Speed Measures with EM Log Tester).
- If speed data is still wrong, check the speed calibration and do it again if necessary.