TM 5-6640-212-14
(1) For example, to divide 22.868 by 6.7, set the
(2) Refer to ASTM Method D92 (TM 10-1166 and
keyboard decimal at three. Three decimal places are
TM 10-1167) for detailed test instructions.
required in the answer, so set the upper dials decimal at
b. Pensky Martens Flash Point Tester.
four (3 + 1= 4). Then the lower dials decimal is seven (3
(1) The Pensky Martens flash point tester designed
+ 4 = 7).
to comply with the requirements specified in ASTM
(2) With the repeat key depressed, set 22.868 on
Method D93 (TM 10-1166), is located in cabinet M1 (figs.
the keyboard. Shift the carriage so the lower dial
2-32 and B-18). It is an electrically heated closed-type
decimal at seven is in direct alinement with the keyboard
unit, with two thermometers, one with a range of 20
decimal at three. Turn the operating crank forward one
degrees F to 230 degrees F (-6.1 degrees C to 110
turn. Make one forward turn of the clear-out crank to
degrees C), and the other with a range of 200 degrees F
clear 1 from the upper dials.
to 700 degrees F (93 degrees C to 371 degrees C). The
Depress the keyboard clear key.
apparatus is used to determine the flash point of fuel oils.
(3) Set 6.7 on the keyboard. Shift the carriage one
The flash point cup is stored in drawer J2 (figs. 1-2 and
place to the right. (To aline the left-hand digit in the
B-15). The stirrer is located in drawer B5 (fig. B-8) and
lower dials with the left-hand digit on the keyboard).
the flexible shaft and support rod are stored in drawer D2
(fig. B-10).
(4) Turn the operating crank backward until the bell
(2) Consult ASTM Method D93 (TM 10-1166) for
rings. Make one forward turn. Shift the carriage one
detailed test instructions.
place to the left.
(5) Continue as in step (4) above until the carriage
c. Tag Flash Point Tester.
reaches the first position. The answer is 3.4131,
(1) The tag flash point tester, designed to comply
rounded off to 3.423.
with the requirements specified in ASTM Method D56
NOTE
(TM 10-1166), is located in drawer J2 (figs. 1-2 and 2-
Be sure to line up the lower dials
31). It is a closed type, electrically operated unit and is
used to determine the flash point of mobile liquids except
decimal with the keyboard decimal
fuel oils, flashing below 175 degrees F (67 degrees C).
before setting the first number in the
It consists of a water bath and cover mounted on the
lower dials.
base, overflow drain, brass test cup (stored in drawer A4,
2-33. Flash Point Testers. The mobile laboratory is
fig. B-7) and standard flashing mechanism mounted on
equipped with apparatus for performing three standard
the cover. Two 20 degrees to 230 degrees F (6.6 to 110
flash point tests on petroleum products.
degrees C), thermometers are used with the equipment.
a. Cheveland Flash Point Tester.
(2) The control can be set to have the heater on for
(1) The Cleveland flash point tester is stowed in
any part of a minute. At FULL ON, the heater is on for a
cabinet K3 (figs. 2-30 and 2-31). It is designed to
full minute.
comply with the requirements specified in ASTM Method
NOTE
D92 (TM 10-1166 and TM 10-1167). The apparatus is an
To increase the setting, turn the knob
open-cup type flash point tester and is electrically heated
counterclockwise.
by a 750-watt heater with an integral rheostat and dial
(3) Refer to ASTM Method D56 (TM 10-1166) for
control. It is used to determine the flash and fire points
detailed test procedures.
of petroleum products, except fuel oils, which have an
2-34. Foam Test Apparatus.
open cup flash above 175 degrees F (79 degrees C).
The heat range is from 20 degrees F to 760 degrees F (-
6.67 degrees C to 404 degrees C). Included with the
a. Description. The foam test apparatus, designed to
apparatus is a permanently mounted test flame burner,
comply with the requirements specified in ASTM Method
pivot post thermometer holder, and refractory top which
D892 (TM 10-1166), is located in cabinet M1 (figs. 2-32
includes a heat-resistant board, cast iron plate, test
and B-18). It is an electrically heated device designed to
flame bead, and open flash cup. The asbestos clamp is
determine the foaming characteristics of crankcase oils
located in cabinet L2 (fig. B-17); the thermometer
at specified temperatures. The constant temperature
(ASTM 11F) is located in the thermometer rack on the
bath consists of a 12by 18-inch glass jar supported on a
door of cabinet N1 (fig. B-19); the flash point cup is
base. Temperature of the bath is automatically
stored in drawer A1 (fig. B-7).
2-57
