KROHNE OPTIBAR PC 5060 C EN - Manual (Page 14)

2
DEVICE DESCRIPTION
14
OPTIBAR PC 5060 C
www.krohne.com 04/2014 - 4003437201 - MA OPTIBAR PC 5060 C R01 en
2.4 Terms and abbreviations
The following terms and abbreviations are used in this document.
URL URL URL URL
Upper Range Limit Upper measuring range limit. Also called nominal range. The highest value that
can be measured by a particular device.
LRL LRL LRL LRL
Lower Range Limit Lower measuring range limit. The lowest value that can be measured by a
particular device.
URV URV URV URV
Upper Range Value The calibrated measuring range or the highest adjusted measured value. This
value corresponds to the 20 mA signal.
LRV LRV LRV LRV
Lower Range Value The calibrated measuring range or the lowest adjusted measured value. This
value corresponds to the 4 mA signal.
SPAN SPAN SPAN SPAN
Span Span or measuring range. SPAN = URL – LRL
CAL SPAN CAL SPAN CAL SPAN CAL SPAN
calibrated Span Calibrated or adjusted measuring span. CAL SPAN = URV – LRV. Also called
"cSPAN".
This is the span set to the 4…20 mA output.
TD TD TD TD
Turn Down The ratio from the measuring span to the adjusted measuring span.
TD= SPAN/(CAL SPAN)= (+URL)/(CAL SPAN)
The following applies: URV ≤ URL, CAL SPAN ≤ SPAN, TD ≥ 1
Example: URL
URL URL URL= 3 bar
LRL
LRL LRL LRL= 0 bar
SPAN SPAN SPAN SPAN= 3 bar
URV URV URV URV= 2 bar
LRV
LRV LRV LRV= 0.5 bar
CAL SPAN CAL SPAN CAL SPAN CAL SPAN= 1.5 bar TD TD TD TD= 2:1
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