User manual for meter with U/I input PD72S
6. PRINCIPLE OF OPERATION
After turning the power supply on, device ID and software version are showed on the display,
next the controller goes to the measurement mode.
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, 6.2).
Figure 6.1. Definitions of measurement ranges in mode 4 ÷ 20 mA
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
).
Figure 6.2. Definitions of measurement ranges in mode 0 ÷ 20 mA
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.
In the measurement mode user can check main thresholds values. After pressing
[^]
or
[v]
button, name of the threshold (e.g.
“rEL1”
) and his value will be displayed on the display in
alternating mode. If
[^]
or
[v]
will be pressed in 5 sec again, the next threshold will be displayed,
else the device comes back to the measurement mode. If a
free access
is enabled (see
description of
“SECu” menu
), user can change the value of particular threshold pressing
button
[ENTER]
(see:
PARAMETERS EDITION
).
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