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Gilson Company, Inc.
1.0 UNPACKING & SET-UP
NOTE: Each Gilson Aqua-Check is carefully inspected
prior to packaging and shipment. Upon receipt of the
shipment, immediately unpack and inspect the ap-
paratus for signs of damage. Report damage imme-
diately to the shipping company. Retain all shipping
records and packing materials until proper operation
is confirmed.
The complete MA-26 Aqua-Check Kit consists of the follow-
ing components:
•
Cast aluminum Sample Chamber Vessel with integral
0—20% Pressure Gauge
•
200 x 0.1g Electronic Balance for weighing of test speci-
mens
•
(2) 1.25in (32mm) Steel Pulverizing Balls
•
Long-handled Reagent Scoop
•
Large, coarse clean-out Brush
•
Small, fine-bristle Brush
•
Sample Cup
•
Heavy-duty plastic Case
The MA-26X inlcudes all of the components listed, except
the Calcium Carbide Reagent*. Any components or accesso-
ries are available individually from Gilson. Model numbers
to order are listed separately in this manual.
*Calcium Carbide Reagent is available separately from Gilson as MAA-44 in
a 10lb can.
2.0 INTRODUCTION
The Gilson Aqua-Check Moisture Tester is designed to mea-
sure the water (moisture) content of soils, aggregates, and
other non-reactive materials. The Aqua-Check apparatus
consists of an aluminum sample chamber vessel with inte-
gral pressure gauge, electronic balance for sample weigh-
ing, two steel pulverizing balls, and assorted brushes and
containers as required for proper completion of the test.
Pulverized calcium carbide is used as a reagent, and reacts
when combined with available water in the sample material
to form acetylene gas. The increase of gas pressure in the
sealed sample chamber is proportional to the water con-
tent, and is shown on the pressure gauge. The most accu-
rate results are obtained when pressure gauge readings are
correlated with data from oven-dry methods. When testing
soils for example, ASTM Standard Test Method D 4944 pro-
vides a procedure to correlate Aqua-Check results directly
with laboratory oven drying methods.
MA-26X
Page 4
Gilson Aqua-Check Moisture Tester: MA-26X
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