Maintenance
39
Data Outputs
Tabular Display
Graphical Display
Customer Service
Any
maintenance
or
service
procedure
beyond
the
scope
of
those
in
this
chapter
should
be
referred
to
a
qualified
service
center.
If
the
unit
needs
to
be
returned
for
any
reason,
request
an
Return
Material
Authorization
(RMA)
through
the
Bird
Technologies
website.
All
instruments
returned
must
be
shipped
prepaid
and
to
the
attention
of
the
RMA
number.
Bird Service Center
30303
Aurora
Road
Cleveland
(Solon),
Ohio
44139
‐
2794
Fax:
(440)
248
‐
5426
E
‐
mail:
For
the
location
of
the
Sales
Office
nearest
you,
visit
our
Web
site
at:
Parameter
Definition
Symbol
Unit
Frequency
Fundamentals (F
o
),Harmonics (F
1
, F
1
…F
15
), and IMD
F
n
Hz
Voltage
RMS voltage
V
rms
Volts
Current
RMS current
I
rms
Amps
Impedance
Magnitude of Impedance,
Z
Ohms
Phase Angle
Phase between V and I
n
Degrees
Power
Average Power
cosine (
)
P
Watts
Relative Power
Harmonic power relative to the fundamental power
dBc
Decibels
Relative Phase
Phase between harmonic and F
0
.
n
Degrees
Parameter
Definition
Symbol
Unit
Voltage Waveform
Voltage waveform versus time, V(t) vs. t
V(t)
Volts
Current Waveform
Current waveform versus time, I(t) vs. t
I(t)
Amps
Impedance Waveform Impedance waveform versus time,
vs. t
Z(t)
Ohms
Power Waveform
Power waveform versus time, P(t) vs. t
P(t)
Watts
Voltage Magnitude Plot Voltage magnitude of a selected frequency vs. t
V(f)
Volts
Current Magnitude Plot Current magnitude of a selected frequency vs. t
I(f)
Amps
Impedance Plot
Impedance magnitude of selected frequency vs. t
Z(f)
Ohms
RMS Power Plot
RMS power of a selected frequency vs. t.
P(f)
Watts
Phase Angle Plot
Phase angle between V and I of selected frequency vs. t
(f)
Degrees
Power Spectral Density Relative power versus frequency
dBr
Decibels
V
I
V
rms
I
rms
y
x b
+
acos
=
Z
