specified shall be installed on the prototype pump that is
tested.)]
2.5.3.3
Instrumentation and Procedures
Each instrument shall be described in detail, giving all data applicable,
such as manufacturer's name, type, model number, certified accuracy,
coefficient, ratios, specific gravity of manometer fluid to be used, and
smallest scale division. When necessary for clarity, sketch of instrument
or instrument arrangement shall be included. Include fully detailed
narrative description of each proposed method of instrumentation,
procedures to be used, and a sample set of computations. State the lowest
equivalent static head that is obtainable with the testing when operating
along the head-capacity curve of proposed pump. Test procedures, except as
specified, shall be in accordance with applicable provisions of HI 2.6.
a.
Head Measurements - Make head measurements using either a direct
reading water column, mercury-air, mercury-water, a Meriam fluid
manometer, or a pressure transducer. Measure vacuums with either
a mercury-air, a mercury-water manometer, or a pressure
transducer. Fluctuations shall be dampened sufficiently to permit
column gages or a differential pressure transducer to be read to
either closest 2 mm 0.01 foot of water or Meriam fluid or 2 mm 0.1
inch of mercury. Manometers shall be used as indicated by ISA
RP2.1. When pressure transducers are used, their accuracy shall
be checked with a manometer.
b.
Capacity - Determine capacity by calibrated venturi flowmeter or
long-radius ASME flow nozzle. Do not use orifice plates. Connect
venturi or nozzle taps to column gages equipped with dampening
devices that will permit differential head to be determined to
either the closest 2 mm 0.01 foot of wateror Meriam fluid or 2 mm
0.1 inch of mercury. Magnetic flowmeters and flowmeters utilizing
ultrasonic flow measurements will be acceptable if calibration of
flowmeter has been completed within the last 6 months.
c.
Rotational Speed of Pump - Measure rotational speed of pump in
accordance with "Method of Rotary Speed Movement" in HI 2.6,
except that revolution counters shall not be used. Non-contacting
hand-held electronic tachometers are acceptable. Device used
shall permit speed to be determined to 1 r/min rpm.
d.
Power Input - Measure power input to pump in accordance with
"Power Measurements" in HI 2.6. Use a method to permit pump brake
wattage horsepower to be determined to the closest 0.5 kW 0.5
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NOTE: Alternate 2.
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e.
Cavitation Tests - The instruments to be used for these tests
shall be selected by the Contractor and shall be of the type
suited for cavitation testing. However, in no case shall the
instruments used yield results less accurate than those obtained
with the performance test.
SECTION 15131A
Page 43
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