User Manual

The menu system
Sum Voltage and Sum
Current Formulas
The PA3000 prov
ide a choice between two methods of summing voltage values
and current values. The voltage methods are unrelated to the current methods. For
a list of the sum voltage and current formulas, refer to sum equations later in this
document. (See page 142, Sum equations.)
Modes
Modes are used to set up the instrument in specific way to allow certain types of
measurements. These modes provide necessary filtering and unique configuration
parameters to measure specifi c signals found in certain applications.
Modes are applied on a group basis. For example, in light ballast applications,
group A could be in normal mode measuring the input power and group B could
be in ball
ast mode measuring the output power.
The following modes are available:
Normal
Ballast
Standby Power
Integrator
PWM Mo
tor
It is often necessary to force the instrument in to a certain way of operating w hen
apar
ticular mode is selected. An example is forcing high bandwidth when B allast
mode is selected. In these cases two things will happen:
Rev
erting back to Normal mode restores any changed settings.
When a setting is forced, it cannot be changed by the operator while the power
an
alyzer is in the non-normal mode
Normal mode
Normal mode is used for most power measurements where signals are uniform and
no special measurement methods are required. Normal mode is the default mode.
B
allast mode
Ballast mode is designed to configure the group to make measurements on the
complex ballast output modulated waveforms. In modern electronic lighting
ballasts, it is often difficult to take accurate measurements because the output
signals are high frequency waveforms that are heavily modulated by the power
frequency. Ballast mode provides a way of locking the measurement period to
the power frequency.
42 PA3000 Power Analyzer User Manual