United States Stove Company 7700, Manual

Page: 113 / 175

POLYTESTS Services
inc.
SFBA EMISSIONS AND EFFICIENCY TESTING
LABORATORY OPERATING PROCEDURE
Page
5
1) Plug probe.
2) Turn on sample system.
3) Observe sample flow rotometer and vacuum
gauge. If necessary, use vacuum; adjust
valve to set vacuum to the maximum inches
Hg.
4) If the float in rotometer does not stabilize
below 10 on scale, system must be
resealed.
5) Repeat leak check procedure until
satisfactory results are obtained.
f) Just prior to starting test, fill impinger container with water
and ice and record ambiant conditions on data form no.
EPA-8-TP.
B. DILUTION TUNNEL SAMPLE TRAIN SET-UP
1. Filters and holders.
a) Clean probes and filter holder front housings carefully and
desiccate for at least 24 hours prior to use.
b) Filters should be numbered and filter and probe
combinations labeled prior to use.
c) Weigh desiccated filters and probe-filter units on analytical
balance. Record weights data form no. EPA-10-TP. Note
that probe and front half of front filter are to be weighed as
a unit.
d) Carefully assemble filter holder units and connect to
sampling systems. Check “DRIERITE” columns for
adequate dry absorbent (blue).
2. Leak checking.
a) Each sample system is to be checked for leakage prior to
inserting probes in tunnel.
b) Plug probes and start samplers, adjust pump bypass valve
to produce a vacuum reading of 5 inches Hg. (NOTE:
During test, vacuum must not exceed 5 inches unless
posttest leak check shows acceptable results.)