The apparatus and instruments required for boiler tests are:
(A) Platform scales for weighing coal and ashes.
(B) Graduated scales attached to the water glasses.
(C) Tanks and platform scales for weighing water (or water
meters calibrated in place). Wherever practicable the feed water
should be weighed, especially for guarantee tests. The most
satisfactory and reliable apparatus for this purpose consists of
one or more tanks each placed on platform scales, these being
elevated a sufficient distance above the floor to empty into a
receiving tank placed below, the latter being connected to the
feed pump. Where only one weighing tank is used the receiving
tank should be of larger size than the weighing tank, to afford
sufficient reserve supply to the pump while the upper tank is
filling. If a single weighing tank is used it should preferably
be of such capacity as to require emptying not oftener than
every 5 minutes. If two or more are used the intervals between
successive emptyings should not be less than 3 minutes.
(D) Pressure gauges, thermometers, and draft gauges.
(E) Calorimeters for determining the calorific value of fuel and
the quality of steam.
(F) Furnaces pyrometers.
(G) Gas analyzing apparatus.