product
.
Shut the toggle valve and uncouple the detector pad assembly.
z
Unscrew the two halves of the detector pad holder. Using tweezers, take
the detector pad out of its envelope and put it, orange side up, in the
recess in the outlet side of the holder. If the sample pad has any
discoloration, unevenness in dye content, or a faded yellow appearance,
select another sample pad. Screw the pad holder assembly back together.
When using a three-way valve, the assembly may be flushed with the pad
in place. Do not remove the test pad from the hermetically sealed
envelope until ready for use. The pad can absorb moisture from the air,
rain, or sneezing. Exposing the test pad to the air on a humid day will
ruin the pad in a matter of minutes.
z
Couple the detector pad assembly back to the sampling coupler, with the
toggle valve closed, and put the end of the plastic tubing into the neck of
the plastic sample bottle. Open the toggle valve and allow 500 mL of
product to pass through the sample pad. Normal sample volume is 500
mL, but if the reading is off scale, sample volumes as low as 100 mL may
be used.
z
Close the toggle valve and uncouple the detector pad holder from the
sampling coupler. Unscrew the detector pad holder. Slip one prong into
the notch in the pad holder, and lift the pad out. Press the test pad
between dry paper towels or blotters to remove excess fuel.
TEST PROCEDURES
Test the fuel after the equipment has been prepared and the sample is drawn.
For maximum accuracy, read the test pad within three minutes after sampling
is begun
.
Use the following procedures for testing.
z
Using tweezers, put the pad in the test pad slot in the bottom of the
ultraviolet lamp assembly. Ensure that the orange side faces the
ultraviolet lamp. Turn on the lamp. Press the hooded button of the meter
assembly while moving the light modulator lever as shown in Figure E-8.
Watch the meter scale while moving the light modulator lever until the
meter pointer points to zero. Always move the modulator arm in the same
direction to avoid backlash. Release pressure on the hooded button and
shut the lamp switch off when the meter pointer has settled on zero. The
meter pointer should stabilize in about a minute.
z
Take the reading from the scale below the lever at the point where the
lever crosses the scale. Record the reading and sample volume. With a
Page 8 of 10
FM 10-67-1 APPENDIX E
5/30/2005
http://www.globalsecurity.org/military/library/policy/army/fm/10-67-1/APPE.HTML
