KROHNE SU 600 Ex EN User Manual
Page 21
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The max. filling volume is 2650 l, the min. filling volume 50 l
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The level sensor in the vessel is a pressure transmitter
(passive), outputting a standardised 4 … 20 mA signal
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For further processing, an additional 4 … 20 mA output
signal is required
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The full and empty adjustment was carried out directly in
the sensor. The following values are outputted:
- max. volume (display max.) 20 mA = 2650 l
- min. volume (display min.) 4 mA = 50 l
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Relay 1 should switch on an emptying pump at a level of
90 % and switch off the pump at a level of 10 %
1 Select the following functions with the rotary switch.
2 Push one of the two [+/-] adjustment keys, the digital
indication flashes (if the rotary switch is set to "OPERATE",
the [+/-] keys are inoperable).
3 Adjust the requested value with the [+/-] keys. If you hold
the key pushed, the digital indication changes the value
more quickly.
4 Save your settings by pushing the [+/-] keys simultane-
ously.
à
Set the function switch to position [8]. Select with the [+/-]
keys the measured value output 4 … 20 mA or 0 … 20 mA.
For this example, choose 4 – 20.
The displayed numbers have the following meanings:
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0 – 20 = 0 … 20 mA
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4 – 20 = 4 … 20 mA
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Save the value by pushing the [+/-] keys simultaneously.
To scale the indication of SU 600 Ex, the filling volumes for 0 %
and 100 %. The vessel does not have to be filled or emptied.
1 Set the function switch to position [7] (display min.).
2 Set the value to 50 via the [+/-] keys.
3 Save the value by pushing both keys simultaneously.
1 Set the function switch to position [6] (display max.).
2 Set the value to 2650 via the [+/-] keys.
3 Save the value by pushing both keys simultaneously.
Because the range of the example vessel is between 50 l to
2650 l, you will need all four positions of the digital indication.
General procedure
Current output
Scaled indication at 0 %
Scaled indication at 100 %
Decimal point
SU 600 Ex - 4 ... 20 mA signal conditioning
21
Setup with the integrated indicating and adjustment unit
30653
-EN
-050803