User manual - METER SWE-N55L
6.
PRINCIPLE OF OPERATION
Device is supplied from current loop. For proper work of device it is required to guarantee
that signal value of current loop is greater than 3.5 mA. If signal value is too low then running
decimal point is displayed. Device configuration using remote controller is possible if signal
value of current loop is greater than 10 mA (it is signalised by front panel LED marked
“
IR”
)
.
6.1.
MEASUREMENT MODE
In the measure mode, the measurement results, converted over selected characteristic,
are displayed on the LED display. The measurement range equal to the nominal range is
called:
nominal measurement range,
and the measurement range equal to the extended
nominal range is called:
permissible measurement range
(figure 6.1).
Figure 6.1. Definitions of measurement ranges in mode 4 ÷ 20mA
If the result of measurement exceeds the
permissible measurement range
, warning
“-Hi-”
or
“-Lo-”
is displayed rather than input signal,
depends on exceeded value (see
description of
“Lo r”
i
“Hi r”
parameters, paragraph
“
inPt” menu
).
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.
Range of displaying values, characteristic of conversion, decimal point position and
measure filtering ratio, are user configurable parameters. All accessible parameters can be
changed by entering the menu (see:
DEVICE PROGRAMMING
). Use the remote controller to
do it.
Configuration of the device via menu
do not stops measures
.
10
i
“Lo r”
parameter
“Hi r”
parameter
4 mA
20 mA
permissible measurement range
nominal measurement range
i
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