Chapter 5 Configuring
T H E P M 1 3 0 P L U S
General
M E T E R S E T U P
PM130 PLUS Powermeter Series
85
you can change the scales to provide a better resolution on an analog
output.
Scaling Non-Directional Analog Outputs
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). The negative power factor is scaled as -1.000
minus the measured value, and non-negative power factor is scaled as
+1.000 minus the 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 ±1mA 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.
For an unsigned output value, you can change both zero and full
engineering scales.
For a signed (directional) value, you should only provide the engineering
scale for the +1 mA output current.
The engineering scale for the 0 mA output current is always equal to zero
for all values except the signed power factor, for which it is set to 1.000
(see
Scaling Directional Power Factor
The meter does not allow access to the low scale setting if the parameter
is directional. Whenever the sign of the output parameter is changed to
negative, the meter automatically uses the full engineering scale setting
for +1 mA with a negative sign.
Scaling Analog Outputs for 0-2 mA and ±2 mA
The 0-1mA and ±1mA current outputs provide a 100% overload, and
actually output currents up to 2 mA and ±2mA whenever the output value
exceeds the engineering scale you set for the 1 mA or ±1mA.
The output scales for 0-1 mA and ±1 mA analog outputs are programmed
for 0 mA and +1 mA regardless of the required output current range.
To use the entire output range of 2 mA or ±2 mA, set the analog output
scales as follows:
0-2 mA: set the 1 mA scale to ½ of the required full scale output for
uni-directional parameters, and set the 0 mA scale to the negative
full scale and the 1 mA scale to zero for bi-directional parameters.
±2 mA: set the 1 mA scale to ½ of the required full-scale output for
both uni-directional and bi-directional parameters.
For example, to provide the 0 to 2 mA output current range for Volts
measured by the meter in the range of 0 to 120V, set the 1 mA scale to
60V; then the 120V reading will be scaled to 2 mA.
Configuring Counters
The PM130 PLUS has four six-digit general counters that can count pulses
delivered through the device digital inputs with a programmable scale
