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Quick Guide

KSAT

At a glance – how it works

The device measures the hydraulic conductivity, Ks, of saturated soil samples. 
Measurements are based on the Darcy equation.

UMS GmbH

Gmunder Str. 37

81379 Munich

Tel. +49 (0) 89 / 12 66 52 - 0

Fax +49 (0) 89 / 12 66 52 - 20

[email protected]

www.ums-muc.de

© 2012 UMS GmbH, Munich, Germany   
Print #: KSAT12.12e    
Subject to modifications and amendments without notice.
KSAT

®

 and KSAT VIEW

®

 are registered trademarks of UMS GmbH, Munich

Printed on paper from chlorine-free bleached pulp.

water column 

height

soil sample

pressure sensor

USB connection 

to computer

water discharge

water 

Note: Key

 
 

water  

electronics  

air

 

soil 

saturated soil 

all other parts

Darcy equation

 

Ks = (L . V) / (H . A . t) 

 L

 length of the sample

 V

 percolated volume of water

 H

 height of the water column

 A

 area of the probe

 t

  time

Illustrations

Instructions

The 

blue

 column gives step-by-step 

instructions on how to work with this 
device, e. g. „Put the sample ring on 
the ring with porous plate.“

The 

grey

 column  

shows the expected  
results of your work.

Summary of Contents for KSAT

Page 1: ...gistered trademarks of UMS GmbH Munich Printed on paper from chlorine free bleached pulp water column height soil sample pressure sensor USB connection to computer water discharge water Note Key water electronics air soil saturated soil all other parts Darcy equation Ks L V H A t L length of the sample V percolated volume of water H height of the water column A area of the probe t time Illustratio...

Page 2: ...he pressure sensor 1 Pa 0 01 cm WC or 0 000145038 psi Accuracy of the temperature sensor 0 2 C 0 4 F Sample ring fits also with UMS HYPROP volume 250 ml 0 066 gal height 50 mm 2 in internal diameter 80 mm 3 15 in Software required Windows 7 and later Microsoft Framework 3 5 Intended use The KSAT device is suitable for measuring the hydraulic conductivity of saturated soil samples in a UMS sample r...

Page 3: ...he KSAT VIEW software Note For installing the KSAT VIEW software you may need administrator rights Fill burette by opening the fill cock then close it Fill measuring dome by opening the burette cock Put wiper plate on the water lense and and take it horizontally off Select Setting zero point in the software Select Setting zero point button A water lense is visible Water level is at the rim of the ...

Page 4: ...t to the sample height recommended times see below Do not pour water on the sample you may trap air Use the time table below for a reference to determine how long samples take to saturate Sample surface shines 4 Measuring Measuring Saturating the soil sample 2 cm 1 in Note How long saturation typically takes material fill up after approx saturated after approx coarse sand 9 min 10 min fine sand 45...

Page 5: ...urette cock until water drains off through the discharge Clay samples may be watered to reduce time Fill burette with up to 5 cms 2 in water column Open burette cock and check if sink rate is approx 0 1 cm 10 sec 0 1 in 20 sec If it is significantly less you may add water into the burette to increase the driving pressure and to reduce measuring time water drains off Measuring 5 0 5 for clay only 0...

Page 6: ...ng head and constant head takes The ballpark duration is seconds to a few minutes for very conductive substrates like sand 1000 cm d or 400 in d whereas measuring substrates like unstructured clay with very low conductivity 0 1 cm d or 0 05 in d may take about 24 hrs or longer The typical exponential curve shape 6 Measuring Measurement runs automatically 0 5 The typical exponential curve shape ...

Page 7: ...5 cm 2 in Select measuring mode Constant Head in the software Enter water column levels you are going to read Press button Start measuring in the software Open burette cock quickly Press button Click here in the software when the water column passes the selected levels The typical constant curve shape Measuring 7 0 5 Click here The typical constant curve shape ...

Page 8: ...wn sample ring soil sample ring with porous plate Leakage free measuring setup Sample ring and or sealing rings are dirty Clean all parts of the measuring setup epecially the sample ring and the sealing rings Wrong trapped air between crown and soil sample between soil sample and porous plate below the porous plate Trapped air Use a soft brush to clean the measuring dome Do not use a sharp tool to...

Page 9: ...nitial water column of 5 cm 2 in Soil samples can pass air bubbles that form a film between the porous plate and the soil sample They reduce the value of the measured conductivity Use degassed water Saturate the soil sample in vacuum A temperature raise reduces the viscosity of the measuring fluid E g increasing temperature from 20 to 23 C 68 to 73 4 F causes a 18 change of the measuring result Me...

Page 10: ...ure sensor can be damaged by water jets or when being touched with hard and sharp objects like screwdrivers etc Accessories Sample ring and Transport box Standardized sample ring to gain intact soil samples with consistent volumes In a transport box for optimum protection Hammering adaptor SZA Soil samples can be taken carefully by using the hammering adaptor SZA250 The soil surface is always visi...

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