L-3 Communications, Narda Safety Test Solutions
Page 11
Narda 8950/10 Stray Voltage Detector
Control
Function
The Mode controls set the system for Bandpass
(Normal) or Harmonics measurement modes.
Bandpass (60 Hz +/- 3 Hz) is the preferred setting
for mobile testing. Harmonics (optional) analysis
is slower and would normally be used when the
vehicle is stationary to determine if the field is
from a primary (low harmonics) or neutral (high
harmonics) side fault.
Clears plot on screen, does not clear data from
log file.
Amount of charge left in probe. Full blue bars
means system is fully charged and will operate for
up to 10 hours.
Numerical display of detected field levels.
Display scale on plot. Unit can be set to auto
range or to fixed scales such as 1, 2 or 5 Volts full
scale. Default setting is auto range, recommended
setting for fixed range is normally 5 volts full
scale.
Marker allows the input of a text line in the log
file to act as a marker. Files are logged with date
and time (standard) but markers can be added
such as address of suspected fault.
IPR2014-00839
Exhibit 2178
Page 11 of 15