Laurel Electronics LT SERIES TRANSMITTERS ANALOG INPUT - Manual (Page 17)

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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.
Board Revision S
1. Use 2.5 mm (0.1") jumpers .
2. Store spare jumpers on an unused jumper post.
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.