E-Mon E-PS-A-RTU-N - Manual (Page 68)

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
68 PowerSmart+ Advanced Power Quality Meter
Option Range Description
AI type 0-1mA
±1mA
0-20mA
4-20mA
The analog input type. When connected to the meter,
shows the actual type received from the device. When
working off-line, select the analog input option
corresponding to your meter.
Zero scale -999,999 to
999,999 Defines the low engineering scale (in primary units) for
the analog input corresponding to a lowest (zero) input
current (0 or 4 mA)
Full scale -999,999 to
999,999 Defines the high engineering scale (in primary units) for
the analog input corresponding to a highest input
current (1 or 20 mA)
Dec. Places 0-3 The number of decimal digits in a fractional part of the
scaled engineering value
Value label An arbitrary name you can give the analog input value
Always save your analog inputs setup to the site database in order to keep the
labels you give the analog inputs. They are not stored in your device.
Scaling Non-directional Analog Inputs
For non-directional analog inputs with the 0-1mA, 0-20mA and 4-20mA current options,
provide both zero and full engineering scales. Each of the scales operates independently.
Scaling ±1 mA Analog Inputs
For directional ±1 mA analog inputs, you should provide only the engineering scale for the
+1 mA input current. The engineering scale for the 0 mA input current is always equal to
zero. The device does not allow you to access this setting. Whenever the direction of the
input current is changed to negative, the device automatically uses your full engineering
scale settings for +1 mA with a negative sign.
Scaling Analog Inputs for 0-2 mA and ±2 mA
The input scales for 0-1 mA and ±1 mA analog inputs are always programmed for 0 mA
and +1 mA regardless of the desired input range. If you want to use the entire input range
of 2 mA or ±2 mA, set the analog input scales in your device as follows:
0 0 0 0----2 mA 2 mA 2 mA 2 mA: set the 1 mA scale to 1/2 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 2 mA 2 mA 2 mA: set the 1 mA scale to 1/2 of the required full-scale output for both uni-directional
and bi-directional parameters.
For example, to convert voltage readings from the analog transducer that transmits
them in the range of 0 to 2 mA to the range 0 to 120V, set the full range for the
+1 mA analog input to 60V; then the 2 mA reading is scaled to 120V.
Programming Analog Outputs Programming Analog Outputs Programming Analog Outputs Programming Analog Outputs
The meter can be ordered with two optional analog outputs with options for 0-1mA,
±1mA, 0-20mA or 4-20mA output currents.
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 set for the 1 mA or ±1mA.
To configure the Analog Outputs in your device, select General Setup from the
Meter Setup menu, then click on the Analog Outputs tab. If you are programming
your device online, analog outputs are designated as not available if they are not
present in the device.
The available analog output options are described in the following table.