MIL-HDBK-1003/3
Table 2 (Continued)
Typical Instrument Applications
INSTRUMENT
GENERAL
SPECIFIC LOCATION
LOCATION
Tappings for
Equipment *Suction and discharge of fans.
draft gages
*Induction unit risers.
*Inlet side of mixing boxes.
Flow indicators
Pipeline
*Pump return for hot and chilled
water systems.
*Each zone of multizone hot and
chilled water systems.
2.2.8.3 Combination Instrument and Controls. Recording and
indicating instruments shall be combined with control devices to
measure conditions at the point of control.
2.2.8.4 Multi-Point Remote Indicators. Use multi-point remote
indicators to check temperature, pressure, humidity, and other
equipment operating conditions for areas remotely located from
the central control point. With large installation, it can be
advantageous and economical to provide multi-point remote
indicators at a central supervisory location instead of having
several indicating type instruments installed at different
spaces.
2.2.8.5
Control Board. Instruments and controls in one space
shall be combined on a single control board and arranged for
rapid readout. Locate control boards for walk-up access.
2.2.8.6
Desired Instrumentation Characteristics
a) Range. The instrumentation range shall be such
that under normal operating conditions, the indicating pointer
will remain vertical. Variations in operating conditions shall
occur within the middle one-third of the range.
b) Compensation. Specify self-compensating
instruments which are not affected by external changes in
temperature or pressure. Provide surge protection for pressure
gages.
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