ELAP LQRQ VD3 Series, Quick Start Manual

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VD3LQRQ_ING.doc 03/09/2020 1/2
PANEL DIGITAL READOUTS
SERIES VD3 LQRQ
Versions VD30 VD30TF VD31 VD31TF
Digital readouts series VD3 LQRQ can be coupled to
linear or rotary potentiometer transducers with
resistive value ranging between 1 and 100 Kohm.
The value of the measured magnitude can be
adjusted from zero up to the instrument full range
scale value.
The number of decimal digits can be selected by
means of internal bridges. All instruments are
provided with extractable terminal board.
Specifications
:
Power supply 24 Vac or 115/230 Vac ±10% 50/60Hz
Absorption 3 VA
Display
7-segment LED display h. 12.7 mm
Display range VD30 -999 ÷ 999
VD31 -1999 ÷ 1999
Decimal digits 0, 1, 2, 3
Polarity automatic with ± sign indication
Resolution VD30 0.1% FSR value
VD31 0.05% FSR value
Accuracy ± 0.05% of the calibration value
Operating temperature 0 ÷ 45° C
Voltage provided by the instrument for
the transducer supply 2.5 Vdc steady
Panel cut off dimensions 92 x 45 mm
Front case dimension 48 x 96 mm
I
nstallation and maintenance
Connect the instrument as described in the enclosed
diagram C2421; check that the power supply
corresponds to the label indication.
In order to change the position of the decimal point
extract the circuit from the rear case after removing
the restrained frame; then select the jumper as
required.
Configuration
In order to configurate the instrument it is necessary
to plug it off, take out the extractable terminal board,
remove the frame placed back of the instrument
(levering on the proper housings) and remove the
circuit completely from its holder.
By positioning the jumpers as described in the
connection diagram tables it is possible to adjust the
decimal point position, the input gain value, and the
full range scale excursion.
After positioning the jumpings it is highly
recommended to close the instrument before
energising it.
Full range scale adjusting
The instrument is normally supplied with adjustment
value = 20 digits.
Use the adjusting trimmers P1 and P2 to set the
display values as needed. In case you cannot
achieve the needed values, it is necessary to set the
FRS at the next superior value.