[Transmitting] Recorder-Totalizer-Indicator

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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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NOTE: Insert electrical power characteristics.

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The [transmitting] recorder 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 shall be

visible through a shatterproof clear window. 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 shall be

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

[_____] phase, [_____] Hertz service. [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 of the meter. Power shall be [_____] volt, [_____] Hertz service.]

The case shall be aluminum, fiberglass, or painted steel and part of with

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.

2.12.2.4

[Transmitting] Recorder-Totalizer-Indicator

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NOTE: On the project drawings, show:

1. Type of plant: (Extended aeration, Step

Aeration, or Complete Mixing).

2.

Design flow.

3.

5-day BOD loading.

4.

Suspended solids loading.

SECTION 11375N

Page 66