ELECTRICAL CONTROL SYSTEM COMPONENTS

hypochlorinator is specified.

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NOTE: For recorder charts, use monthly charts for

extended aeration type plants 0.88 L/s 20,000 GPD

and below and for plants in remote locations. Use

weekly charts for extended aeration type and step

aeration type above 0.88 L/s 20,000 GPD capacity

through 6.60 L/s 150,000 GPD capacity. Use daily

charts for extended aeration type and step aeration

type above 6.60 L/s 150,000 GPD capacity, and for

all complete mixing type plants.

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NOTE: Insert electrical power characteristics.

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NOTE: Delete requirements for signal transmission

to the chlorinator when hypochlorinator is specified.

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The [transmitting] recorder-totalizer-indicator shall combine the functions

of recording, totalizing indicating within one case; shall read in liters

per second thousands of gallons per day in uniformly graduated units; and

shall have a range of from 5 to 150 percent of the average flow through the

plant. The chart, totalizer read-out, and indicator scale shall be visible

through a shatterproof clear window(s). Internal movements within the

instrument shall in no way interfere with taking of the differential

measurement. The mechanism shall not be affected by the intended end use

environment. The chart shall be 250 or 300 mm 10 or 12 inches in diameter

and shall rotate once [daily] [weekly] [monthly]. The chart drive shall be

driven by a synchronous motor suitable for operation on [_____] volt,

[_____] phase, [_____] Hertz service. Totalizer shall read the total flow

in thousand liter thousand gallon units using only a whole power of 10

multiplier. [The signal transmission to the chlorinator shall be impulse

duration type or milliampere direct current analog signal type. All

transmission shall be actuated by the output motion meter. Power shall be

[_____] volt, [_____] Hertz service.] The case shall be aluminum,

fiberglass, or painted steel and part of the meter. The unit shall be

weatherproof equipped with a sealed door for access to the mechanism, and

designed to prevent the accumulation of moisture or fog inside the case. A

suitable mounting stand shall be provided.

2.12.2.5

Charts for Recorder

One year's supply of charts and ink shall be furnished for recorder.

2.13

ELECTRICAL CONTROL SYSTEM COMPONENTS

2.13.1

General

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NOTE: Specify outdoor type enclosure except when

enclosure will be located in a building.

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SECTION 11375N

Page 68