E-Mon E-PS-A-RTU-N - Manual (Page 69)

Chapter 4 Power
S O F T W A R E G E N E R A L M E T E R S E T U P
PowerSmart+ Advanced Power Quality Meter 69
Option Range Description
AO type 0-1mA
±1mA
0-20mA
4-20mA
The analog output type. When connected to the
meter, shows the actual AO type read from the
device. When working off-line, select the analog
output option corresponding to your meter.
Output
parameter See Appendix B Selects the measured parameter to be transmitted
through the analog output channel.
Zero scale Defines the low engineering scale (in primary units)
for the analog output corresponding to a lowest
(zero) output current (0 or 4 mA)
Full scale Defines the high engineering scale (in primary units)
for the analog output corresponding to a highest
output current (1 or 20 mA)
When you select an output parameter for the analog output channel, the default
engineering scales are set automatically. They represent the maximum available scales. If
the parameter actually covers a lower range, you can change the scales to provide a better
resolution on the analog outputs.
Scaling Non-directional Analog Outputs
When programming scales for non-directional analog outputs with a 0-1mA, 0-20mA or
4-20mA current option, you can change both zero and full engineering scales for any
parameter. The engineering scale need not be symmetrical.
Scaling Directional Power Factor
The engineering scale for the signed power factor emulates analog power factor meters.
The power factor scale is -0 to +0 and is symmetrical with regard to ±1.000 (-1.000 ≡
+1.000). Negative power factor is scaled as -1.000 minus measured value, and non-
negative power factor is scaled as +1.000 minus measured value. To define the entire
power factor range from -0 to +0, the default scales are specified as -0.000 to 0.000.
Scaling ±1 mA Analog Outputs
Programming engineering scales for directional ±1mA analog outputs depends on
whether the output parameter represents unsigned (as volts and amps) or signed
(as powers and power factor) values.
If the output value is unsigned, you can change both zero and full engineering
scales.