L2000C Datasheet, PDF (4/11 Pages) Amphenol Corporation – PROTIMETER

Protimeter Speedy
March 2014
Moisture Test Procedure for Large Size Speedy (cont.)
9. Release the pressure: Hold the Speedy vertically with the pressure gauge facing the ground. Locate the arrow on the
flange of the cap and point this away from yourself and other people in your vicinity. Unscrew the top screw slowly to
vent the gas that may have been generated within the Speedy.
10. Remove the sample and reagent: Tip the contents of the Speedy directly into a clean and dry open container and
dispose of in accordance with Section 13 of the Calcium Carbide Material Safety Data Sheet.
11. Clean the Speedy: Clean the Speedy vessel, cap and measuring beaker in preparation for the next moisture measurement.
Special Considerations
Use the instructions in this section to adapt your test procedures to special measuring conditions.
Applying the Proportional Test Technique
If the moisture content of the material exceeds the measurement range of the Speedy being used, then the Proportional Test
Technique may be used to obtain measurements. This involves halving the normal sample weight and doubling the gauge
value. For example:
1. Assume an L2000D Speedy with a measurement range of 0-20 H₂O% W/W is being used to test soil with a nominal
moisture content of 30%.
2. The sample is prepared as required and half the normal weight (i.e. 10 g) is placed in the Speedy.
3. The normal test procedure is followed and a gauge value of 14.7% is recorded.
4. This value is then doubled to give the actual moisture content of 29.4%.
The Proportional Test Technique may also be used to obtain clearer readings in very dry material by doubling the sample size
and halving the gauge value.
Compensating for Non-Standard Temperature
For optimum performance the Speedy tester and sample should be at 20°C (68°F) when used. If this is not practical, take at
least three tests in quick succession to equilibrate temperatures as much as possible. Ignore the first and second test results and
record the later results.
Establishing Correction Factors
When compared with oven test results, Speedy readings may be low if the material under investigation contains volatile
components other than water, as these may evaporate with the water at elevated temperatures. Correction factors for given
materials can be established by plotting graphs of Speedy test results against oven test results.
Measuring Moisture Content in Liquids
Speedy testers may be used to measure the moisture content of certain liquids (most commonly oils) by adapting the test
procedure as follows:
1. Weigh the liquid sample as in the standard procedure.
2. Place the liquid in a clean mixing vessel and add two to four scoops of dry sand. Mix the contents thoroughly and place
the mixture in the Speedy vessel.
3. Continue with the test as detailed in the standard Moisture Test Procedure.
Converting Wet Weight to Dry Weight
The pressure gauges used with the Series 2000 Speedy testers are calibrated to give the moisture content expressed as a
percentage of the sample's wet weight. If required, the measured value (M_WW) can be expressed as a percentage of the
sample's dry weight (M_DW) by using the following formula:
M_DW
=
-1---0---0----^-----M-----^W-----^W---
100 – M_WW
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