GGU-SIEVE: Combined sieve and hydrometer analysis input

If, because of the quality of the sample, the grain size distribution was determined by sieving and by sedimentation, both the "Evaluate hydrometer arm" and the "Evaluate sieve arm" check boxes must be activated in the "Edit/Grain size distribution" dialog box.

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Test value input for the combined sieve/hydrometer analysis is as described in the previous sections dealing with the input for sievingand hydrometer analyses. However, when entering dry weights, it should be noted that the program takes the pan weight as a percentage from sieving into consideration for evaluating the hydrometer data. If you perform a sieve and hydrometer analysis using different sample quantities, the "Adjust" check box must be activated. For input of the dry mass then:

• Sieving after sedimentation:
  The coarse component > 0.125 mm is sieved after sedimentation.
  Dry mass (hydrometer analysis) [g] = Total dry mass of sample
  Dry mass (sieving) [g] = Total dry mass of sample
  The program determines the percentage hydrometer analysis component automatically from the pan weight given for sieving
  
  Sieving before sedimentation:
  The coarse component > 0.125 mm is sieved before sedimentation.
  
  1. Input when testing with one sample:
  The entire fines from the tray are adopted for sedimentation.
  Dry mass (hydrometer analysis) [g] = Total dry mass of sample
  Dry mass (sieving) [g] = Total dry mass of sample
  
  2. Input when testing with two separate samples:
  Dry mass (hydrometer analysis) [g] = Total dry mass of the sample
  used for the hydrometer analysis
  Dry mass (sieving) [g] = Total dry mass of the sample used for sieving
  The "Adjust" check box must be activated. The program converts the mass used for hydrometer analysis to the percentage fines from sieving.