ADS Environmental Services IntelliServe 2.8.1 950026A7 User Manual

Page 267

A-4

IntelliServe

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User’s Guide

CONFIDENTIAL – Covered by ADS Terms of Use and Confidentiality Agreement in Contract

Overflow – Dry Weather

This event indicates that a dry weather overflow may be
occurring (or has occurred) at the specified location. A High or
High High alarm was received from the location, IntelliServe
collected and evaluated the rain data collected from the rain
gauges configured for the wet/dry overflow evaluation and
determined that little or no rainfall occurred during the specified
time period. An overflow during a dry weather condition
warrants immediate investigation of the data reported, perhaps
including a field visit to the monitoring location.

Overflow – Wet Weather

This event indicates that a wet weather overflow may be
occurring (or has occurred) at the specified location. A High or
High High alarm was received from the location, IntelliServe
collected and evaluated the rain data collected from the rain
gauges configured for the wet or dry overflow evaluation and
determined that sufficient rainfall occurred during the specified
time period. Investigation of the potential wet weather overflow
should follow local, state, and federal regulation criteria.

Possible Backwater
Conditions

This event detects an increase in the flow depth concurrent with
a decrease or less-than-expected increase in the velocity. These
conditions could indicate a blockage downstream. IntelliServe
initiates an alarm when average velocity reads less than 75
percent of velocity back-calculated from the Manning SAG
equation for 1 hour of consecutive readings. Alarm conditions
cease when average velocity readings are equal to or more than
75 percent of velocity back-calculated from the Manning SAG
equation for 1 hour of consecutive readings.

Pressure Depth Readings
Used

This event indicates the system no longer referenced the
ultrasonic depth sensor to obtain Unidepth, but obtained depth
readings from the pressure depth sensor for a specific time
period. This may have occurred due to a submerged ultrasonic
depth sensor during surcharge conditions.

Rain Exceeding
Threshold

This event indicates a rain event in progress has exceeded a
specified threshold.

Surcharge Conditions

This event indicates that a location is experiencing surcharge
conditions. A surcharge exists when the flow completely fills
the pipe and begins to fill the manhole. IntelliServe must detect
this condition for 4 consecutive depth readings to initiate an
alarm. IntelliServe clears this alarm (returns to normal) when
the depth readings fall to at least 2 inches below the pipe height
for 4 consecutive readings.

Ultrasonic Sensor
Temperature

This event indicates that the temperature sensor in the first
ultrasonic depth sensor is producing invalid temperature
readings. Temperatures are reading either extremely high or
extremely low.