52
Configuring the Model 1133A
◦
Loss Compensation:
Compensates for copper loss and hysteresis in transformers.
◦
Anti-Creep:
Thresholds set the minimum value at which the meter begins to “turn.”
◦
Internal Calibration:
Sets the 1133A internal calibration constants; set by the factory.
◦
Voltage Linearity Correction:
Helps compensate for non-linear variations in calibrated
values.
Figure 7.3: Measurement Parameters
Configuration Screen
1. Make certain that there is an open connection with the 1133A and that you are logged on
with permission to configure. If you are not, see “Basic Configuration Requirements” in the
introduction of this section.
2. From the PSCSV, select Connection
>
Configure
>
Measurement Parameters, or click the
measurement parameters button. Choose DSP Mode to select the type of electrical system
being measured. Allowed electrical systems are listed in each category drop-down list. See
also Section 3.2.3 for additional details on electrical connections.
3. Select the CTPT tab to reveal the installation area, and type in the required values.
At the
least, always enter a value in Calibration Point 1 for all phases.
The 1133A uses these as
defaults for all cal points if all others are missing. Without this, the 1133A may represent
current phase angles 180 degrees out of phase with the voltage. If you are not entering in a
CT ratio, enter a value of “1” for CT calibration points based on input configuration as seen
in the Figure 7.4. If out of phase by 180
◦
, add 180 to “CT Error Phase 1” for each configured
phase.
Figure 7.4: CT Cal. Points
4. Select Loss Compensation to install transformer constants for transformer secondary-side
metering, if it is used.
