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1768B-.15SYS1
1768B-.15SYS3

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GUIDE

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Low Tension Lab Setup

Jun 2021

SOILMOISTURE EQUIPMENT CORP. P.O. Box 30025, Santa Barbara, CA 93130 U.S.A.
Phone: (805) 964-3525 - Fax: (805) 683-2189 - Email: [email protected] Website: http://www.soilmoisture.com

Figure 1. Low Tension Lab Setup (Model 1768B-.15SYS3).

Содержание 1768B-.15SYS1

Страница 1: ...Low Tension Lab Setup Jun 2021 1 SOILMOISTURE EQUIPMENT CORP P O Box 30025 Santa Barbara CA 93130 U S A Phone 805 964 3525 Fax 805 683 2189 Email sales soilmoisture com Website http www soilmoisture com Figure 1 Low Tension Lab Setup Model 1768B 15SYS3 ...

Страница 2: ...important to save the shipping container and all evidence to support your claim Be sure to read all operating instructions thoroughly before operating the unit WARRANTY LIABILITY Soilmoisture Equipment Corp SEC warrants all products manufactured by SEC to be free from defects in materials and workmanship under normal use and service for twelve 12 months from the date of invoice Soilmoisture Equipm...

Страница 3: ...em for creating the Moisture Retention Characteristics Curve The curve has numerous applications in agricultural sciences constructions engineering mining oil industry environmental sciences and more Soilmoisture Equipment Corp has been manufacturing systems for creating Moisture Retention Curve since 1950s Low Tension Lab is designed for moisture levels very close to saturation Main applications ...

Страница 4: ...TAPEMEASURE 1 TAPE MEASURE 14 XPVCEXC1 8 1 4 12FT CLEAR PVC TUBING 4 1768 005 2 STAND EXTENSION 15 1768 1000 01 1 RESERVOIR TUBE 5 1768 009 1 STAND END EXTENSION 16 1768 1000 02 2 RESERVOIR END CAP 6 1275 002 1 ALUMINIUM STAND BASE 17 1930 1 LOCKING SYRINGE 60 CC 7 1768 002 1 STAND RISER 18 1768 004 1 RESERVOIR CLAMP 8 1768 010 20 FILTER PAPER 19 XFSMSS2420CAE04 2 SET SCREW 9 0675D12TL 1 TRANSPARE...

Страница 5: ...2 HEX NUT m XCNLUSC MMPC 8 LUER STOPCOCK MALE MALE d XFWFW010CAR 2 WASHER n MZL133 XFBCH2420CAF00 2 SCREW KNOB LONG e XORING2 004 3 O RING FOR SET SCREW p XCNLU1 8B FLPP 4 FEMALE LUER TO 1 8 BARB f XORING2 010 4 O RING FOR DRANAGE PORT q XCNLU MMABS 6 MALE MALE LUER COPLING g 1768 011 3 DRANAGE TUBE r XCNLU FFPP 4 FEMALE FEMALE LUER COPLING h XCNLUTEE FFFPP 3 LUER TEE ALL FEMALE s XCNLU1 8NPT FLNY...

Страница 6: ...ebsite http www soilmoisture com Low Tension Lab in a Glance Figure 4 A Low tension Lab Setup The setup consists of a Sandbox Tension Table connected to a Hanging Water Column The height difference between the surface of the saturated sand shown in pink and the dripping port of the Hanging Water Column determines the tension level applied ...

Страница 7: ...ons inside the Lab Shelving Package Assembling the Water Trap Jar o Water Suction Line The Tubing is about 24 inches long o Syringe Pump Pay close attention to the direction of the Luer Check Valves item t The Water Stop Filter item k might get plugged after being exposed to water vapor You need to replace it at that point The Syringe Pump will still work without the Water Stop Filter p 14 m s g t...

Страница 8: ...Box 30025 Santa Barbara CA 93130 U S A Phone 805 964 3525 Fax 805 683 2189 Email sales soilmoisture com Website http www soilmoisture com Syringe Vacuum Pump The tubing is about 12 inch long o One Liter Bottle comes assembled 12 p 14 p ...

Страница 9: ...9 SOILMOISTURE EQUIPMENT CORP P O Box 30025 Santa Barbara CA 93130 U S A Phone 805 964 3525 Fax 805 683 2189 Email sales soilmoisture com Website http www soilmoisture com o Water Trap Assembly ...

Страница 10: ...the system o Add 6 inches of water and mix Agitate the mix completely Then stop agitating and let the mix particles settle at the bottom of the column for 30 minutes then dump the murky water on top of the settled sand Note do NOT dump the murky water in the drain It might settle in the drainage pipes and plug them o Add water again up to the 6 inch mark Agitate the mix completely Then let the mix...

Страница 11: ... Saturation Pan s wall o Connect the Luer connection and the Stopcock according to the schematic above o Pour about 5 cm of water on top of the Zero tension Pan You ll notice that some air bubbles get trapped under the mesh screen of the Zero tension Plate The air bubbles should be removed o Use the Syringe Pump to apply vacuum to the Water Trap Jar Make sure that the Stopcock is closed o Now use ...

Страница 12: ...ir bubbles trapped in the Zero tension Plate and the Tubing There should be no air bubbles in the system Eliminating bubbles might seem tricky in the beginning It takes some practice to find effective ways to get rid of air bubbles o Once all air bubbles are eliminated place the Pan over its intended place where it will not be moved for the duration of the measurement This can be the Shelf include...

Страница 13: ...he transparent Lid on the Pan and let the sand settle for a day o The sand will settle and create an even and level layer over the Plate The sand surface might be cracked around the perimeter of the Plate or other places That is normal You can get rid of the cracks later Take off the Lid o Using the Syringe Pump apply vacuum to the Water Trap Jar and evacuate the extra water on top of the sand lay...

Страница 14: ...and surface Make sure that no air bubble is trapped under the paper filters o Place the Lid over the Pan Now your Sandbox Tension Table is ready to use Assembling the Hanging Water Column Stand Assembling the Stand o Screw the Stud Adaptor in the Stand Base o Screw the Stud in the Stud Adaptor o Place the Base Support over the Base Make sure that the square recess on the Base Support is facing up ...

Страница 15: ...tic The bottom of the Riser sits inside the Base Support square recess o Place two Washers item d over the Stud o Screw two Hex nuts item c over on the Stud Tighten the first nut first and then the second one The second nut prevents the first one from loosening over time o Place a Stand Extension over the Raiser Note that the kit includes two Stand Extensions items 4 that are longer than the third...

Страница 16: ...sales soilmoisture com Website http www soilmoisture com o Secure the Extension to the Stand Base using a Screw Knob o Place the second longer Extension on top of the first one Make sure that the screw holes are on the same side see the schematic o Secure the second Extension to the first one using a Set Screw n 4 v ...

Страница 17: ... the third Extension item 5 over the second one Make sure that the screw hole is on the same side as the others Make sure that the Extension is right side up see the schematic o Secure the third extension to the second extension using a Set Screw o Put the Stand End Cap on top of the Stand o Assembling the Reservoir Insert the Reservoir Tube inside the Reservoir Clamp 5 b v 15 18 ...

Страница 18: ...gher or lower to the Tube We recommend fixing the Reservoir Clamp closer to the bottom of the Reservoir Tube see the schematic Insert the Reservoir End Caps into the Reservoir Tube the End Cap is items 16 plus 20 plus S already assembled Make sure that the side ports of the End Caps are parallel to the side of the Reservoir Clamp side see the schematic o Assemble the Drainage Port Assembly see the...

Страница 19: ...of the Reservoir Clamp o Secure the Indicator in place by tightening the Set screw implemented in the Reservoir Clamp The Set screw is shown in the schematic Use the Allen Wrench included in the system to tighten the Set screw o Attach the Reservoir to the Stand This requires a special maneuver because the Indicator gets in the way Once the Reservoir is attached to the Stand slide the Reservoir cl...

Страница 20: ...the top Luer Plug for vent see the schematic o Fill the Syringe with water and fill the Reservoir using the Syringe o Open the Drainage Stopcock for a few seconds and let water drain out Then close the Stopcock The goal of this step is to fill the drainage path with water and eliminate any potential trapped air bubbles Secure the Luer Plug back to the port on top of the Reservoir ...

Страница 21: ...voir and avoid trapping air bubbles in the Tubing o Open the Sandbox Stopcock to fill the Tubing with water There should be no air bubbles in the Tubing Hold the end of the tubing upward and try to sustain a droplet of water on top of the Luer connection see the schematic Then close the Sandbox Stopcock o Open the Reservoir bottom Stopcock slowly until a drop of water hangs from it Then close the ...

Страница 22: ...rt a Luer barbed connection item p in each end of it o Hold the end of the Tubing against the Stand and at a height that you think is higher than the water surface in the Pan see the schematic o Open the Sandbox Stopcock Since there is free water in the pan water stars to flow thru the Tubing due to gravity Gently add more water over the sand if the free water height falls below 5 mm o Wait until ...

Страница 23: ...edle are usually fine Bubbles that fill the whole inside diameter of the Tubing should definitely be eliminated Note that during this step there should always be about 5 to 10 mm of water standing over the sand surface in the Sandbox If the Sandbox runs out of free water water stops flowing and you won t be able to test the system If that happens carefully add more water over the sand trying to no...

Страница 24: ...10 cmH2O of tension about 10 millibar of tension o Hold the Reservoir Tube with one hand and unscrew the Reservoir Knob with the other hand until you can slide the Reservoir up and down along the Stand o Slide the Reservoir up down until the Indicator is against the target tension level For instance if the target level is 50 cmH2O the Indicator needs to be against the 50 cm mark on the Tape This m...

Страница 25: ...amples o Put the Lid on top of the Pan to minimize evaporation o Wait until the Samples are saturated Add more water if water subsides significantly Depending on the soil type saturating soil samples might take from several minutes sand to several days clay o Once the Samples are saturated use the Water Trap Jar to evacuate the free water in the Pan Do not worry if you can t evacuate all free wate...

Страница 26: ...130 U S A Phone 805 964 3525 Fax 805 683 2189 Email sales soilmoisture com Website http www soilmoisture com COPYRIGHT 2021 All rights reserved 0898 1768 06 2021 With dealers throughout the world you have convenience of purchase and assurance of after sales service ...

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