Multi
Pump
Level Control |
Level control in sewage lift
stations is normally provided by two or more pumps, with a level
controller to tell the pumps when to start and stop. |
| Level
#1 |
Continuous level measurement in
process vessels can be problematical when critical high and low
alarms are required, but the level system is unable to guarantee
a reliable signal at the extremes of span due to coned bottoms
or minimum ranges. |
| Level
#2 |
Continuous level measurement in
vessel containing solids can cause problems due to angles of
repose from filling cycles. |
| Level
#3 |
Continuous level measurement in
process vessels can call for high accuracy linearization. |
| Flow
#1 |
MEDACS can interface with any level
transmitter output and linearize any vessel shape, with up to 60
co-ordinate pairs for straight line interpolation, or up to a
15th order polynomial for highest accuracy. Alarms serial
communication, local display etc. are all standard. |
| Flow
#2 |
Accurate measurement of flow over a
wide flow range can be problematical due to the turndown of the
flowmeter providing inaccurate measurement at extremes of span. |
| Flow
#3 |
Flow control, to ensure a constant
flow to a process is often achieved by regulation of a valve or
penstock. The valve position is governed by the output from a
signal from an upstream flow sensor. Direct control, and even
PID control can cause the valve to hunt. |
| Flow
#4 |
"No Flow" alarm. A
single channel MEDACS with analog and relay outputs is used with
an OEM acoustic solids flow sensor. |
| Flow
#5 |
MEDACS can be used with almost any
level sensor to measure "head" upstream of a flume or
weir. |
| Flow
#6 |
MEDACS can be used with almost any
sensors to measure differential. |
| Flow
& Level #1 |
A Dual Channel MEDACS can monitor
"overflow to storm" in a Storm Sewer Overflow (SSO). |
| Dewpoint
#1 |
Dewpoint measurement can be critical
in a number of manufacturing processes. |
| PID
Control #1 |
MEDACS can provide full three mode
control, by downloading the TFML function from our website.
This can be used for all types of heater control, with a choice
of analog or relay output dependent on application. |
| Temperature
#1 |
The universal input to MEDACS will
allow a temperature sensor input, RTD or Thermocouple, to be
conditioned without additional devices. |
| Temperature
#2 |
Critical control or monitoring of a
process variable may require "dual validation" where
two sensors are used to ensure contingency in the event of a
sensor failure. |
| Temperature
#3 |
Monitoring of temperature may require
only peak, valley or average temperature to be recorded. |
| Density,
Level, Temperature #1 |
MEDACS offers flexibility. In this
application in a brewery, raw level, pressure and temperature
inputs are being conditioned to provide linearized level, volume
and temperature. |
