Troubleshooting Guide 111
© 2018 Nortek AS
Problem with the transmitter: Note that this probe is submerged (you will get a similar result when
running a probe check in air). The transmitter is not functioning properly. Check if there is something
blocking it, or contact Nortek for further guidance.
Problem w ith transm itter: Either blocked or not functioning
Grounding: (Vectrino: loose grounding wire): The noise floor is varying around 50 counts. Tests
in laboratory tanks can sometimes lead to grounding problems that show up as elevated noise
levels, but only after the instrument is submerged in water. You will not automatically see the
increased noise level in your data if your signal from the water is above the noise, but the increased
noise level could look like signal. Suggestion: Check that the grounding wire between the probe and
the electronics on the Vectrino is connected (you will need to remove the probe to check this).
Second, you may be able to reduce your problems by coiling your cable into a tight bundle and
raising the cable above the floor (i.e. placing it on a chair).
Vector: One way to tell the noise level in the tank is to collect with the transmitter out of the water
but the receiver arms in the water. The signal you now see is noise only. Grounding problems will
disappear when you disconnect the Vector from the computer and from the external power supply.
Collecting data to the internal recorder using batteries can be an option to remove possible grounding
problems in indoor environments.
Grounding: Keep in m ind that grounding problem s occur around man-m ade structures, and are not
norm ally a problem in the field.
Sharp peak around 30 mm (relevant for the Vector): This is just electronic noise when
transmitting, and this has no influence on the current measurements. There is nothing wrong with the
instrument.
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