User Manual

The menu system
External shunt
scaling. This scaling is applied to the current measurement
channel voltage inputs. This is used for current transducers that have a voltage
output. These include Hall effect transducers as well as simple resistive shunts.
The scaling factor is expressed in Amps (read) per Volt (applied). The default
value is 1. This means that with 1 V
rms
applied, the current channel will read 1 A
rms
.
An example w ould be a clamp-on Hall effect current transducer measures up to
100 A. It has a voltage output of 10 mV per Amp, which is equivalent to 100 A /
V. Enter “100.00” and the power analyzer will display the correct system current.
Analog inputs
The power analyzer has four analog inputs on the rear of the instrument. Each of
the four inputs can be used to measure signals from a device such as a torque or
speed s ensor. Each of the four inputs has two different ranges. The ranges are
±10 V (default range) and ±1 V. Each input is sampled every millisecond and
the reported measurement is the average of the sa mples over the time period
controlled by the update rate.
Analog inputs are made available to the MATH setup. They can b e incorporated
into the MATH formula and displayed on the MATH screen. (See page 56, Math
results.)
Graphs and waveforms
The PA3000 provides different ways to display data:
Waveforms
Harmonic bar charts
Vect or d i a g r a m s
Integrator graphs
There are menu options for wavefor
ms and integrator graphing, bar charts, and
vector diagrams. (See page 12, Quick view keys.)
Waveforms
Use the waveform menu to select waveforms to display. For each group, y ou can
select any voltage, current, or watts waveform for each channel in the group to
display on the waveform graph. (See page 12, Quick view keys.)
To change groups use the left and right arrow keys at the bottom left of the display.
Integrator parameters
Use the Integrator Graph menu to select one parameter to display on the integrator
graphing screen. The following integrator parameters are available:
Watt Hours
VA H o u r s
PA3000 Power Analyzer User Manual 53