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11-02-2011, 05:32 PM
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#1
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3 Rivet Member
2007 34' Classic S/O
The Villages
, Florida
Join Date: Dec 2005
Posts: 119
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MicroPulse black tank sensor
I am about embark on changing the black tank sensor on my 2007 34' Classic.
Can someone tell me where it is located specifically? How do I know I am not changing the wrong sensor, other than the ODOR?
Thanks.
__________________
Phil & Doris Drugge
[COLOR="Red"]WBCCI #4941
"Jerry and our Amazing Dream Stream"
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11-02-2011, 05:45 PM
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#2
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Rivet Master
2007 30' Classic
Oswego
, Illinois
Join Date: Jul 2010
Posts: 13,655
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I think your tank layout is the same as mine, even though mine is a 30'. Under the wardrobe floor, through the cutout on the floor for the fresh water line...if you look aft a little you should see the black tank sensor. It'll be a little difficult for you to bend yourself to get at it, but it's better than the gray tank sensor.
__________________
-Rich-
"If the women don't find you handsome, they should at least find you handy." - Red Green
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11-02-2011, 06:29 PM
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#3
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Rivet Master
2008 27' Classic FB
Burkburnett
, Texas
Join Date: Jul 2010
Posts: 985
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It threads into a fitting either on the side of the tank against the bottom, or it might be in a fitting along the bottom of the drain pipe between the tank and the dump valve. The cable going to it plugs in like a phone plug. If you can see the cable, maybe you can follow it down to its location. I've never looked for mine, just assumed I would have to drop the pan to get to it. If that sensor is giving you trouble you might try to replugging the cable into it for a better connection before replacing the sensor.
__________________
AIR 47751
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11-02-2011, 06:38 PM
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#4
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4 Rivet Member
Join Date: Oct 2003
Posts: 341
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Changed fresh water sensor from inside wardrobe and didn't see any other sensors. To calibrate rather than filling tank for full level I got the tank dimensions from Airstream and built a pvc pipe with threaded nipple. The height of the pvc above the sensor is the same as the tank depth. With only several ounces of water You can calibrate the full level versus gallons. These sensors work on head pressure and it is constant over depth regardless of the diameter or overall volume.
__________________
"Forbidden Wheels Clubhouse Recon Team"
S/OS #010
2004 30ft Slide Out with Hensley Arrow hitch.
Pulled by a 2019 F350 Superduty Limited.
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11-02-2011, 06:45 PM
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#5
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Rivet Master
2005 30' Classic
Kingston
, Washington
Join Date: May 2011
Posts: 692
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Quote:
Originally Posted by ctdair
Changed fresh water sensor from inside wardrobe and didn't see any other sensors. To calibrate rather than filling tank for full level I got the tank dimensions from Airstream and built a pvc pipe with threaded nipple. The height of the pvc above the sensor is the same as the tank depth. With only several ounces of water You can calibrate the full level versus gallons. These sensors work on head pressure and it is constant over depth regardless of the diameter or overall volume.
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Very nifty trick for calibrating. I'm impressed.
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11-02-2011, 08:43 PM
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#6
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Rivet Master
2008 27' Classic FB
Burkburnett
, Texas
Join Date: Jul 2010
Posts: 985
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That is a great solution for calibrating the sensor. Thanks.
__________________
AIR 47751
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11-03-2011, 03:42 AM
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#7
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4 Rivet Member
Join Date: Oct 2003
Posts: 341
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After I calibrated the sensor that way I mentioned it to Don while on a tour of the factory and he showed me the tubes the factory used to do the same thing.
Head pressure was something we learned in Millwright school.
__________________
"Forbidden Wheels Clubhouse Recon Team"
S/OS #010
2004 30ft Slide Out with Hensley Arrow hitch.
Pulled by a 2019 F350 Superduty Limited.
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11-04-2011, 07:37 AM
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#8
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3 Rivet Member
2007 34' Classic S/O
The Villages
, Florida
Join Date: Dec 2005
Posts: 119
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Quote:
Originally Posted by ctdair
Changed fresh water sensor from inside wardrobe and didn't see any other sensors. To calibrate rather than filling tank for full level I got the tank dimensions from Airstream and built a pvc pipe with threaded nipple. The height of the pvc above the sensor is the same as the tank depth. With only several ounces of water You can calibrate the full level versus gallons. These sensors work on head pressure and it is constant over depth regardless of the diameter or overall volume.
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Hi,
Can you post a picture of that pipe? Dimensions?
__________________
Phil & Doris Drugge
[COLOR="Red"]WBCCI #4941
"Jerry and our Amazing Dream Stream"
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11-04-2011, 09:33 AM
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#9
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4 Rivet Member
Currently Looking...
Weldon Spring
, Missouri
Join Date: Jul 2009
Posts: 463
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I'll welcome any shortcut to the calibration procedure....now if they'll just improve the reliability of the sensors themselves....
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11-04-2011, 11:43 AM
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#10
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4 Rivet Member
2008 16' Safari
Destrehan
, Louisiana
Join Date: May 2009
Posts: 395
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Don't waste your time with this. I've changed and calibrated my black water sensor three times. It still does not work. The grey water and freash water seem to work fine. Just look down the toilet to check the level.
There have been several post about the MicroPulse level gauges. Nobody seems to have any luck with them Try digging through the old post about this.
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11-04-2011, 04:41 PM
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#11
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4 Rivet Member
Join Date: Oct 2003
Posts: 341
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Didn't save the dimensions , guess I should have in case sensor fails again. Airstream was very helpful in sending tank dimensions(Blueprint cad drawing) by email in pdf form. To make the pipe it was just a pvc elbow with the correct heighth pipe glued in one end and the correct adapter for the pipe thread of the sensor glued in the other elbow end. Carry the pipe to the trailer plug in the sensor and calibrate per micro-pulses instructions. It only takes several ounces of water then versus filling complete tank.Guess I should have saved the pipe ,I probally did that but where it is at escapes me at the moment.
__________________
"Forbidden Wheels Clubhouse Recon Team"
S/OS #010
2004 30ft Slide Out with Hensley Arrow hitch.
Pulled by a 2019 F350 Superduty Limited.
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11-04-2011, 04:49 PM
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#12
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Rivet Master
2007 30' Classic
Oswego
, Illinois
Join Date: Jul 2010
Posts: 13,655
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Over the first year of ownership, and many tries, I think I have discovered something. I believe it takes a considerable amount of time for the sensors to equalize with changes in pressure.
After several attempts to calibrate in rapid successions, I gave up. I began to notice while camping that rapid "dumps" into the gray tank were not readily reflected in the monitor level lights. So this spring I decided to try a calibration again.
In the first step, allow the tanks to be empty for several hours. Then start he process. Perform the "empty" readings. Fill the tanks JUST LIKE THE INSTRUCTIONS SAY VERBATIM! That means, Fill them, then drain a little, so you have warning before they are truly full.
LET THEM SIT AT THIAS FULL LEVEL FOR SEVERAL HOURS!!!!!!!!!!!!!!
Then proceed with the "teaching" the monitor the full level. Don't worry, apparently the monitor will stay in calibration mode indefinitely
__________________
-Rich-
"If the women don't find you handsome, they should at least find you handy." - Red Green
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11-05-2011, 10:04 AM
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#13
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4 Rivet Member
Currently Looking...
Weldon Spring
, Missouri
Join Date: Jul 2009
Posts: 463
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Hi dznf0g, I'm looking forward to trying your new "procedure".....come to think of it, in the past I have noticed brief time lags in the reporting of rapid level changes, (especially when liquid is ADDED to the tanks), so it makes complete sense that the sensors would behave like that in calibration mode, too. I failed to connect those dots.
However, assuming that a satisfactory calibration really takes several hours to achieve, now I'm even MORE disappointed with Caton Products, and Airstream, too. (SEVERAL HOURS?? PLEASE, AIRSTREAM!!??)
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11-06-2011, 07:17 AM
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#14
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Rivet Master
2007 30' Classic
Oswego
, Illinois
Join Date: Jul 2010
Posts: 13,655
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Quote:
Originally Posted by fmrcaptevil
Hi dznf0g, I'm looking forward to trying your new "procedure".....come to think of it, in the past I have noticed brief time lags in the reporting of rapid level changes, (especially when liquid is ADDED to the tanks), so it makes complete sense that the sensors would behave like that in calibration mode, too. I failed to connect those dots.
However, assuming that a satisfactory calibration really takes several hours to achieve, now I'm even MORE disappointed with Caton Products, and Airstream, too. (SEVERAL HOURS?? PLEASE, AIRSTREAM!!??)
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I don't KNOW that it takes several hours to "settle" in....I just waited that long cause I didn't want to do it again.
__________________
-Rich-
"If the women don't find you handsome, they should at least find you handy." - Red Green
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11-07-2011, 08:22 AM
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#15
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3 Rivet Member
2005 28' International CCD
San Jose via Winnepeg, Toronto, Orlando, Saratoga and Groton
, California
Join Date: Oct 2005
Posts: 100
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Quote:
Originally Posted by dznf0g
Over the first year of ownership, and many tries, I think I have discovered something. I believe it takes a considerable amount of time for the sensors to equalize with changes in pressure.
After several attempts to calibrate in rapid successions, I gave up. I began to notice while camping that rapid "dumps" into the gray tank were not readily reflected in the monitor level lights. So this spring I decided to try a calibration again.
In the first step, allow the tanks to be empty for several hours. Then start he process. Perform the "empty" readings. Fill the tanks JUST LIKE THE INSTRUCTIONS SAY VERBATIM! That means, Fill them, then drain a little, so you have warning before they are truly full.
LET THEM SIT AT THIAS FULL LEVEL FOR SEVERAL HOURS!!!!!!!!!!!!!!
Then proceed with the "teaching" the monitor the full level. Don't worry, apparently the monitor will stay in calibration mode indefinitely
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I think mine has been in calibration mode for over two years. Perhaps I'll finally calibrate the monitor again with the tube setup.
Chris
__________________
2005 28' CCD International
2x120W Solar Panels/22A GoPower Controller
1200# Equalizer Hitch
2007 GMC Yukon XL SLT
"Where are my keys?"
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12-20-2011, 04:15 PM
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#16
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4 Rivet Member
Join Date: Oct 2003
Posts: 341
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Found the tube I made for this procedure. Will post pic and dimensions , but will be Thursday before I have a chance. I made it out of copper ,thought I had used pvc but I must have had the right fitting in copper.
__________________
"Forbidden Wheels Clubhouse Recon Team"
S/OS #010
2004 30ft Slide Out with Hensley Arrow hitch.
Pulled by a 2019 F350 Superduty Limited.
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12-22-2011, 03:54 PM
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#17
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4 Rivet Member
Join Date: Oct 2003
Posts: 341
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http://www.airforums.com/forums/f443...7fb-85787.html
Posted picture of tube and dimensions in above thread.
__________________
"Forbidden Wheels Clubhouse Recon Team"
S/OS #010
2004 30ft Slide Out with Hensley Arrow hitch.
Pulled by a 2019 F350 Superduty Limited.
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