Siemens sitrans PROBE LU Instruction Manual page 9

Short
Long Form
form
ppm parts per million
PV Primary Variable
SELV Safety extra low voltage
SV Secondary Variable
TVT Time Varying Threshold
U Input voltage
i
U Output voltage
o
URV Upper Range Value
USL Upper Sensor Limit
1.
100% is most commonly set to 20 mA, and 0% to 4 mA: however, the settings
can be reversed.
7ML19985HT01 SITRANS Probe LU – INSTRUCTION MANUAL
Description
measured value
equivalent value
sensitivity threshold
value for process full level
above which no PV is
anticipated
Units
V
V
1
20 mA
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