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. |
