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Tankage Calibration? |
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SVZara
Captain Joined: 04 November 2018 Location: Boston, MA Status: Offline Points: 196 |
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Posted: 19 October 2021 at 01:28 |
Is there anyway to set the calibration on the water and fuel tanks? When my sensor says 0%, there is a lot more water left in the tank. This week as a test, I let it get to zero and didnt refill. We went three days before it finally made the water pump run away. This is with taking showers, doing dishes, etc. I wish when it gets to the REAL zero, I can set that as the low point for the sensor.
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Marc
S/V Zara 2016 Hanse 505, Hull #129 |
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Matt1
Rear Admiral Joined: 10 March 2019 Location: Hamble, UK Status: Offline Points: 664 |
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I have the same issue with my fwd tank. I could be wrong but I don’t believe there is a way to calibrate the display. If yours is like mine then the problem is that the sender is too short. The bottom of mine ends some height off the base of the tank (10/20 cm) so is never going to be able to measure the water below it.
I’ve not checked whether this is an error by Hanse in using the wrong sender unit or more likely just that the next longest sender available would have been too long. I just treat “0%” as an indicator that I am now on reserve and need to fill up at the next opportunity. Like you, I can get about 3 more days on board when I reach this point
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Hanse 418 #64 EmBer. Hamble, UK
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Black Diamond
Vice Admiral Joined: 24 October 2015 Location: Newport, RI, US Status: Online Points: 923 |
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What I did was disconnect the sensor inputs from the WURTH panel display
(wurth-less) and hook them to another display. In my case an SIMARINE
PICO but there are many that will take any resistance or voltage based input. You
can then calibrate it into any number of points wanted. You can also
add other sensors. In my case, batteries, refrig/freezer temp, fuel
tanks, etc.. See pics. I find the WURTH panel (if you have it) an embarrassment to German engineering and have done as much as possible to take it out of the monitoring loop.
Edited by Black Diamond - 19 October 2021 at 12:50 |
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Rick
S/V Black Diamond Hanse 575 Build #192, Hull# 161 Newport, RI |
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FalParsi
Commander Joined: 28 January 2021 Location: Malta Status: Offline Points: 127 |
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I agree with Rick and have done the same, albeit with a Victron GX Touch display. I have also taken out the tank sensors and replaced them with high-res Wema sensors.
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2016 Hanse 505 #120
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Matt1
Rear Admiral Joined: 10 March 2019 Location: Hamble, UK Status: Offline Points: 664 |
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That is beautiful ;-) Very nice
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Hanse 418 #64 EmBer. Hamble, UK
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SVZara
Captain Joined: 04 November 2018 Location: Boston, MA Status: Offline Points: 196 |
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Thanks for ALL the info and details!! More additions to the project list.
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Marc
S/V Zara 2016 Hanse 505, Hull #129 |
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Christian K
Sub Lieutenant Joined: 03 December 2020 Location: Germany Status: Offline Points: 16 |
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Hi Rick,
what kind of PICO-System from Simarine do you have exactly? The Pico ONE, STANDARD or BLUE? We ordered the ONE type from HANSE with our new 508. Thank you! Christian |
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HANSE 508 #88
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Johny
Lieutenant Joined: 15 March 2016 Status: Offline Points: 37 |
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I checked the Wurth fuel display on my Hanse 455 by connecting an accurate resistance decade box instead of the fuel tank sensor. The minimum resistance of the standard supplied VDO fuel sensor is 3 ohms and this is presented as 0% fuel on the display. The maximum resistance of the sensor is 180 ohms and this shows as 99% fuel on the Wurth display.
I checked all the readings in between from 0% to 100% in steps of 1%. My conclusion from this test is that the Wurth panel display very accurately shows the resistance presented by the fuel sensor and is nearly perfectly linear. The problem is that the sensor does not accurately represent the actual amount of fuel in the tank due to its location and length and the fact that the tank has a highly irregular shape. I would assume that the water tank display suffers from a similar problem.
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Breathe
Commander Joined: 17 July 2018 Location: Australia Status: Offline Points: 146 |
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I went the low tech route. For water tanks I marked levels on the side of the tank, and lift the cushion to have a look.
For the fuel tank I keep a record of each fill, including what the Hanse meter reads, and how much fuel required to fill the tank. After a number of fills you can develop a table of panel read out V’s tank level. Low tech, but reliable! Gordon
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Arcadia
Rear Admiral Joined: 27 November 2017 Location: Sag Harbor, USA Status: Offline Points: 656 |
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Hi guys. If the problem with Marc and Matt is a short sensor, then no amount of calibration with a new digital display will correct that. Once the sensor send the minimum value, it’s done whether the tank is at 20 percent or 0 percent. I know that the wurth panel has its issues, but I have found the read outs for all my tanks very usable as long as the senders are correct.
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Leon / ARCADIA
2018 Hanse 588 Sag Harbor, NY |
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