Laurel Electronics LAUREATE SERIES DPM - Manual (Page 32)

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16. AC (RMS) VOLTS & AMPS
This section provides basic setup instructions for true RMS voltage or current monitoring. An RMS
signal conditioner is required. Some menu items, such as leading zero blanking, display filtering,
etc., are not discussed in this section and have been set to the most commonly used values.
Should these items require change, refer to section 10 for selection information. For configuration
of optional boards, see the appropriate section elsewhere in the manual.
16. 1 RANGE JUMPER SELECTIONS
Voltage
Jumpers Required
Input AC Coupled
200mV
g, k
2V g, j
20V h, k
200V h, j
660V f, j
Current
Jumpers Required
Input AC Coupled
2mA
e, f, k
20mA d, f, k
200mA c, f, k
5A a, b, f, m
Figure 16. 1 RMS Signal Conditioner
16. 2 MENU SELECTION
Whenever the scale factor is 1.0 and offset is zero, the meter displays a direct readout of the
signal input in (milli)volts or (milli)amperes. In the following example, the meter is configured
for a full scale display of 0 to 20V or 0 to 20mA equals 20.000. Other ranges follow the same
setup format. Note that the decimal point selection does not affect the displayed value. A full
scale value of 20000 may be displayed as 20.000 Volts or 20000 millivolts. When an external
shunt or current transformer is used to monitor current, the appropriate scale factor must be
entered. A 5A CT input to the meter displays 20000 (2000 when 3 1/2 digit is selected). For
an 800 Amp CT, divide 8000 (desired full scale display with .1 Amp resolution) by 20000 (full
scale when the scale factor is 1.0) for the correct scale factor. Enter .4 as a scale factor. During
setup, it may be necessary to enable some menu items that are locked out. See Section 9 for
further information.
a
b
c
d e
f
m j
k
h
g