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Laurel Electronics LTA DPM SERIES ANALOG INPUT User Manual

Page 18

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10. AC RMS SIGNAL CONDITIONER BOARD JUMPER SETTINGS

Five voltage and four current ranges are jumper selectable. These also have to be selected in
Instrument Setup software.

To minimize noise pickup, the input signal wiring should utilize a shielded twisted pair, and the
shield should be connected to signal low at the RMS board, as illustrated below. If signal low is
close to earth ground, such as within 2V, signal low can further be connected to earth ground.

Signal Source

RMS

Board

Sig High
Sig Low

Earth Ground

Shield around twisted pair

Shielding for AC noise reduction










Voltage Ranges

Jumpers

200.00 mV
2.0000 V
20.000 V
200.00 V
600.00 V

j

c, g, h

c, i

c, k

c, m

Current Ranges

Jumpers

2.0000 mA
20.000 mA
200.00 mA
5.000 A

l, k

b, m
a, m

c, d, e, m

Signal Coupling

Jumpers

AC + DC
AC only

f

none

m

l

k

i

h

g

j

f

e

d

c

b

a

The flexible noise shield may be removed for
jumper setting, but must then be reinstalled.