THE BEOWX-DfVEL MOISTURE TESTER 
31 
COMPARTMENT 
COVERS REMOVED 
AFTER TESTS 
COOLED TO 160° C. 
(THERMOMETER 
READING 160° C) 
10 MINUTES AFTER 
CUT-OFF TEMPERATURE 
WAS REACHED 
(THERMOMETER 
READING 180° C) 
5 MINUTES AFTER 
CUT-OFF TEMPERATURE 
WAS REACHED 
(THERMOMETER 
READING 186° C) 
IMMEDIATELY AFTER 
CUT-OFF TEMPERATURE 
WAS REACHED 
(THERMOMETER 
READING 190° C) 
Correct Cooling Time 
and. 
Correct Moisture Test Result 
5 minutes 
16.75% moisture 
!»'««« 3 Cooling Time | Moisture Test Result 
Fig. 23. — Effect of cooling time on the moisture-test result 
PRIMING TESTS 
In making a moisture test with the Brown-Duvel tester, all of the 
moisture which is distilled from the grain is not obtained in the grad- 
uate during the first test with a new flask. Some of it stays behind 
on the walls of the glassware. To accomplish accurate results, it is 
therefore necessary to make a preliminary or priming test in all the 
compartments of a new moisture tester, or when new distillation 
flasks are used, before a regular test is made. This is also true when 
a machine has been standing idle or standing open for any appreci- 
able length of time. The length of time a tester may stand idle, after 
which it will be necessary to make a priming test before the regular 
test is made, depends somewhat upon the state of the machine when 
not in use. 
The data, which are summarized in Tables 8 and 9, and shown 
graphically in Figures 24 and 25, show that a failure to make a 
IS. 9% Moisture 
CONNECTIONS 
CLOSED 
BUT 
NO < 
PRIMING 
TEST 
MADE 
15.9% Moisture 
Fig. 24. — Necessity of making a priming test before making moisture test after 
the moisture tester, with all connections closed, has been standing idle for 
any appreciable length of time is here shown 
