Level Pro ITC 450, User Manual

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If the result of measurement exceeds the permissible measurement range, warning ”-Hi-” or ”-Lo-” is
displayed rather than input signal, depending on exceeded value (seedescription of “Lo r” and “Hi r”
parameters, paragraph ”inPt” menu). The warning can be effect of measurement circuit malfunction. In that
case “-Lo-” means shortcut and “-Hi-” means break of measurement circuit. If sensor failure will be detected
(e.g. broken wires), then ”S.Err” warning will be displayed
If the measurement value do not exceeds permissible measurement range but displayed value
exceeds range -999 ÷ 9999, the warning ”-Ov-” is displayed rather than the calculated result.
nominal measurement range
permissible measurement range
4 mA 20 mA
Figure 6.1. Definitions of measurement ranges in mode 4 - 20mA
"Lo r" parameter
"Hi r" parameter
Figure 6.2. Definitions of measurement ranges in mode 0 ÷ 150mV
”Hi r” parameter
0 mV 150 mV
permissible measurement range
nominal measurement range
Figure 6.3. Definitions of measurement ranges in mode Pt100
permissible measurement range
”-Lo-” message
displayed
”-Hi-” message
displayed
-100°C +600°C
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ITC 450/470
User manual