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STEP 7. Agitating the sample:
a. Without Pulverizing Balls: Hold the Aqua-Check
vertically with the gauge facing down and agitate
vigorously for 5–10 seconds. Turn the Aqua-Check
around, and with the gauge facing up agitate again
for 5–10 seconds. Tap the sides so that the sample
falls into the chamber cap. This process should be
repeated for 1–3 minutes, or until the gauge reading
in Step 8 has stabilized.
b. With Pulverizing Balls: Hold the Aqua-Check
horizontally and use an orbital motion to spin the
balls around inside the chamber, pulverizing the
sample. Agitate for 20 seconds and rest for 20
seconds, repeating the process at least three
times. Periodically check the position of the gauge
indicator. Continue the agitation cycle until the
indicator has stabilized. Some highly plastic clays
may require 3 minutes or more of agitation.
STEP 8.
Read the pressure gauge at eye level
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while holding the vessel horizontally. Wait for the
indicator needle to stop moving. The gauge reads
directly in percent water content of wet weight.
Accuracy may be improved by establishing a
correction chart as shown in ASTM D4944.
STEP 9: Loosening top screw to vent
pressurized gas
Gilson Aqua-Check Moisture Tester, MA-26X
STEP 7B: Using an orbital motion to spin the balls
STEP 8: Reading the pressure gauge at eye level
STEP
9. Taking great care that the black dot on the
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chamber cap is facing away from your face and body,
slowly loosen the top screw to vent pressurized gas from
the vessel.
STEP
10. Place the used sample/reagent mixture and
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residue in an open dry container and dispose of in
accordance with local regulations or Section 13 of the
MSDS. Use the Coarse-Bristle Brush to clean the vessel
and prepare for the next test.
around inside the chamber
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