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Application/Duty: Level Measurement
1.
With power on and the MSP900SH transmitter giving a 4-20mA signal to the MCU901 unit (see previous pages), you can
now programme the MCU901 for an application. This application example is for level measurement.
3.
Start the "Duty" Wizard by pressing the yellow (ENTER) key once.
4.
Work through the "Duty" Wizard prompts (see next page) until completion; this occurs when the menu system re-
appears. Keypad hints, for the illustrated Wizard sequence on the next page, are provided alongside the prompts. If
applicable, adapt the example to suit your application.
5.
Circled numbers in the illustrated Wizard sequence relate to these notes:
Select "Level" from the multiple-choice list.
Programme the 4-20mA output span with a level range (e.g. 0 to 11.7 metres)
Set-up a high level alarm – the relay RL1 is energised whenever the measured level exceeds a pre-set level and
de-energises below another pre-set level, as defined at these prompts.
Optional overrides to prevent individual relays from being energised for too little time or too much time.
Option to set-up further relays.
6.
Return to the main menu by holding the ESC key for a few seconds, releasing it when the main menu appears. Next, go
on-line by selecting the "Go on-line" menu option and then pressing the ENTER key once. Finally, press the ESC key
repeatedly until the primary display appears. The level measurement will be live on the primary display.
(IP2040/QS)
Requirements
Live level measurement in units of metres over a range of 0 to 11.7 metres.
High level alarm.
Input Data
Tank Shape: Linear (e.g. Square)
Bottom Reference: 12 metres
The MSP900SH transmitter is supplying the live level measurements in units of
metres.
6
2.
Navigate the menu system to get to the
"Duty Wizard" screen. Keypad hints are
alongside the screens.
January 2006
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