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South East Nordic Tugs Owners' Association (SENTOA)

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Fresh Water Gauge

DB
david.boyuka@gmail.com
Sun, May 8, 2022 6:49 PM

My fresh water gauge stays pegged on full until the tank is half full and
then reads half when tank is empty.  I have replaced the sending unit in the
tank, but no improvement.  I cannot find any way to calibrate, either at the
gauge or the sending unit side.  Has anyone else experienced this and what
is the remedy.

Thank,

David Boyuka

"Tina Marie"

42-073

My fresh water gauge stays pegged on full until the tank is half full and then reads half when tank is empty. I have replaced the sending unit in the tank, but no improvement. I cannot find any way to calibrate, either at the gauge or the sending unit side. Has anyone else experienced this and what is the remedy. Thank, David Boyuka "Tina Marie" 42-073
G
gefuller5@comcast.net
Sun, May 8, 2022 7:57 PM

David,

Do you have the Centroid gauge?

If so, the calibration is straightforward. Centroid has a detailed instruction sheet on their website, centroidproducts.com.

In short, you jumper (short) the sending terminal to the ground terminal at the sender and then turn on the gauge power. After a specific time the jumper is quickly removed. For older senders up to early 2013 the times are 2 seconds to calibrate the empty level and 6 seconds to calibrate the full level. For newer senders the times are 10 seconds and 20 seconds respectively. After jumper is quickly removed the rest of the calibration is automatic. This process needs to be done separately for empty and full, although the order is not important.

The more time-consuming part is that the tank needs to be full and empty to calibrate at those levels.

Gene Fuller

Yorkshire Rose

NT 37-136

Punta Gorda, FL

David, Do you have the Centroid gauge? If so, the calibration is straightforward. Centroid has a detailed instruction sheet on their website, *centroidproducts.com*. In short, you jumper (short) the sending terminal to the ground terminal at the sender and then turn on the gauge power. After a specific time the jumper is quickly removed. For older senders up to early 2013 the times are 2 seconds to calibrate the empty level and 6 seconds to calibrate the full level. For newer senders the times are 10 seconds and 20 seconds respectively. After jumper is quickly removed the rest of the calibration is automatic. This process needs to be done separately for empty and full, although the order is not important. The more time-consuming part is that the tank needs to be full and empty to calibrate at those levels. Gene Fuller *Yorkshire Rose* NT 37-136 Punta Gorda, FL
DS
Dave Sire
Fri, May 13, 2022 4:19 PM

I replaced mine with one from the same company as the original (Centroid). I was told it doesn’t need calibrating, and unlike the previous unit, there is nothing to adjust on the sensor. I have found it completely unreliable.

I finally plumbed in a clear sight tube that never lies. I have to peek under the tank room hatch to see it though.

Dave Sire
m/v Tortuga
Edgewater, MD
Nordic Tug 37-171

I replaced mine with one from the same company as the original (Centroid). I was told it doesn’t need calibrating, and unlike the previous unit, there is nothing to adjust on the sensor. I have found it completely unreliable. I finally plumbed in a clear sight tube that never lies. I have to peek under the tank room hatch to see it though. Dave Sire m/v Tortuga Edgewater, MD Nordic Tug 37-171