AMETEK i Series - Manual (Page 315)

User Manual
i Series / iX Series 301
Sub-Tab Description
For three- phase EUT‟s, any imbalance in power between the
three phases is calculated by the GUI program and compared
against Figure 9 of the ABD0100.1.8 specification. The
amount of imbalance is displayed in % of total VA to the right
of the power readings.
Inrush Current (A) Displays peak current detected per phase in Amps since last
measurement was taken.
Power Factor Displays power factor for each phase. Power factor
measurement data is compared against Figure 10 of the
ABD0100.1.8 specification for both leading and lagging
power factors. If one or more phases is outside the allowable
limits, a Fail indication is displayed.
Current Distortion
(%) Displays Total Current Distortion for each phase in percent of
fundamental current. No limits are applied although the user
can set a maximum limit for this parameter if needed in the
“ABD010018_Distortion_Limits.ini” setting file by adding “Ithd
= n.n” in either TABLE_F or TABLE_G sections..
The bottom half of the Parameters tab contains user controls and a text entry field
for entering observations regarding the EUT operation.
Test Frequency
Dropdown control The frequency selection drop down control is active only for
Table C mode (Variable Frequency) and can be used to set
the frequency at which data from the EUT is to be acquired.
For all other modes, it is fixed to either 400 Hz or DC.
Acquire Data at all
frequencies This button caused data to be acquired at all frequencies
available in the Test Frequency Dropdown control.
For all tables other than C, this button functions like the
Update Meas. Button located above the subtabs.
Abort Meas. This button aborts measurements in progress. In case of
Table C, acquiring data at all 12 frequency settings can take
a long time. This button allows this process to be aborted.
Read Meas. Data
from File This button reads measurement data from disk. Each time
measurement data is acquired by the GUI, it is saved to an
ASCII text file. A separate file is used for each frequency or
DC setting. To recall data taken at a specific frequency
setting, select the desired frequency using the Test
Frequency Dropdown control before clicking on this button.
Note that all measurement data files are saved in the Reports
subdirectory of the GUI application directory using file name
convention “MeasData_ABD01008_nnn_Hz.txt” where „nnn‟
is the frequency setting or DC.
Waveforms This tab displays the voltage and current waveform (time domain) for each phase.
The sample rate is automatically set to display about 20 msec of time.
Cur Graph This tab displays the Current harmonics in a bar graph format. Up to 50 harmonics
are displayed.
Cur Spectrum This tab displays the same current harmonics as the Current Graph tab except in a
tabular format. Data is shown in both absolute and relative form (percent of
fundamental current). A limit table is applied and a pass or fail indication is shown
in the last column. Values that exceed the allowable limits are shown with a red
background in the Pass/Fail column.
No. Harmonic number, 1 through 50
Freq (Hz) Frequency of harmonic in Hz.
Curr (A) Absolute current (rms) in Amps.
% Fund. Relative current in percent of the fundamental current (I1).
Limit Allowable current harmonic limits per Table F for single-phase
EUT‟s or Table G for three-phase EUT‟s of ABD0100.1.8.
Distortion limits per tables F and G are contained in the
“ABD010018_Distortion_Limits.ini” file located in the
“ABD_Dbase” directory or the selected airframe directory.
P/F Pass or Fail indication.
A phase selection is available to the left of the graphs and table, which allows each