Taylor-Wharton KeepFull Telemetry System - Manual (Page 5)

Figure 1: General Layout and dimensions
Solar
Panel
Telemetry
Unit
High
Pressure
Tap Low
Pressure
Tap
Button
For Local
Display
Differential
Pressure
Transmitter
Mounting
Bracket
Tank
Pressure
Gauge
Introduction
The bulk tank liquid level monitoring system provided by
Taylor Wharton provides the latest technology for local as
well as remote observation of a bulk tank’s contents. This
system enables an operator to check tank liquid level
from any computer that has Internet access as well as at
the tank site. With its local digital display it is a direct
replacement for the analog differential pressure “Con-
tents Gauge” commonly being used. Because wireless
transmission is used and the unit is battery powered, no
external wiring is required. Therefore installation is as
easy as the replacement of the “Contents Gauge.”
The system consists of a differential pressure transmitter,
a local digital display, a cellular transmitter/receiver, and a
database service that is accessed through an Internet
Web site. Solar assisted batteries supply power for long
life. The differential pressure transmitter connects to the
same tank instrument lines as the “Contents Gauge.”
This component comes with 0-325” and 0-600” water
column spans. Every hour the pressure transmitter
senses the tank liquid level by measuring the differential
pressure produced by liquid in the tank. Transmitter
output is communicated to the tank mounted telemetry
device in the form of a 4 to 20 mA electrical signal. The
hourly readings are locally stored and at least one time
per day they are all transmitted to the database. For local
observation of the current liquid level
, a button is de-
pressed causing a tank reading to be taken. The tank will
be sampled every 10 seconds for 15 minutes. During a
fill the same button is used and the tank will be sampled
at the same rate for 1 hour.
Figure 1 below shows the general layout of the telemetry
device.
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