MIL-HDBK-1005/7A
6.13.1.1 Standardization. Equipment should be standardized
wherever possible. Use identical or similar components to the
maximum extent. Instrumentation and control equipment should be
homogeneous (that is, all self -powered, all pneumatic, and so
forth).
6.13.1.2 Equipment Accuracy. Equipment accuracy tolerances
should be consistent with the functions desired.
6.13.1.3 Equipment Ranges. Before selecting equipment, the
required maximum and minimum capacities should be computed, and
ranges should be kept as narrow as possible for any piece of
equipment.
6.13.1.4 New Products . New products and applications are
constantly being developed. Advice on application and use
should be requested from Naval Facilities Engineering Command
Criteria Office or HQ AFCESA as appropriate.
6.13.2
Information Required . Obtain the following
information to assist in equipment selection:
a)
Type of treatment.
b) Chemical, physical, and bacteriological qualities
of raw water, and actual variations; treated water, permissible
limits.
c) Variations of flow rate or demand for raw water or
waste, treated water or waste.
d)
Ranges of other related variables.
e)
Size of plant.
6.13.3
Primary Measuring Devices . Primary measuring devices
are required at significant locations in water supply systems to
sense and measure flow, pressure level, temperature, weight, pH,
and other process variables essential to proper operating
control and evaluation of plant performance. See Table 14 for
examples of locations of measuring devices and types of
measurements.
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