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Frequency Analysis of Mains
The chart in Fig
.
14 shows an ana-
lysis of a 50 Hz mains signal
.
The
content of harmonics is measured
up to the 23rd harmonic (1150Hz)
the level of which is seen to be
80 dB below the level of the Funda-
mental
.
The analysis was carried
out using the analyzer section of
the 2010 connected to a Level Re-
corder 2307. The 3,16 Hz band-
width was used for the analysis
.
ANALYZER SECTION
Frequency
Range:
2Hz to 200kHz in three linear and logar-
ithmic ranges
Pos.
x
0
,
1: 2 Hz to 2 kHz
Pos.
x
1: 20Hz to 20kHz
Pos.
x
10: 200Hz to 200kHz
Frequency
Response:
Linear Mode:
±
0, 2 dB (10Hz to 50 kHz)
±
0
,
5 dB (2Hz to 200kHz)
Selective Mode:
1: Six constant bandwidth band-pass fil-
ters
2: A
,
B
,
C and
0
weighting networks
3: External filter
Sensitivity:
1 011V to
300V for full deflection in
1 OdB steps
Input Section:
Input Impedance: 1 MO 1180 pF (direct in-
put)
Output
Impedance
(to
ext.
filter):
<250
Max. Output Voltage: 5 V PEAK
Input Amplifier Gain: 40 dB
Gain Control: 0 dB (cal) to -10 dB
Input Attenuator range
:
90 dB in 1 0 dB
steps
Accuracy of attenuator:
±
0
,
1 dB rela-
tive to
"
0
,
1 V
"
at 1 kHz
Distortion: <
0,01% (20Hz to 50 kHz
,
output voltage
~
1 V)
<
0,03% (20Hz to
100kHz.
output vol
-
tage~
1 V)
Noise:
With max
.
amplification and input short
circuited.
Center
frequency
~
2
x
bandwidth
.
Bandwidths 3,16 to
100Hz: <
0
,
6 11V
Bandwidths 316 to 1000Hz:
<
1,2J1V
A, B and C weighting:
<
2 11V
D weighting:
<
5 J1V
Linear (2Hz to 200kHz):
<
7 11V
Constant Bandwidth Filters:
Type: Double 2 pole butterworth
3,5 dB
Bandwidths:
(Effective
noise
bandwidths)
3,16Hz,
10Hz,
31
, 6Hz,
100Hz,
31 6 and 1 000 Hz
3 dB
bandwidth
effective
noise
bandwidth
x
0 ,96
Accuracy of bandwidths:
±
5%
Shape factor of filter characteristic:
BW60dB
~
7
BW3dB
DOOOOOOOOOODOOOOOOOOOOOODDOOOODOODOODDOODOOODOOOOOOOOOOOOOOOOOOOO
.u.l
&
K)mr
BNoi&Kjoo<
t~g-o
Hz
100 Hz
-
200 Hz
-
300 Hz
-
400 Hz
-
500 Hz
-
600
Hz-
700 Hz =800 Hz=900 Hz =1000 Hz =1100 Hz
=
====::
Funda-
5
_
40 mental
3
I-50
7
2
9
13
6
15
-
11
17
4
10
'-70
8
12
19
14
=
!==16
_
21
6
t---
18
23
===:
r--80
----
-
GP 110
2
171495
Fig.14. Analysis of harmonics on mains
Specifications 201 0
Dynamic Range:
>
85 dB (in bandwidths 3
,
16 to 100Hz)
>
75 dB
(in
bandwidths
316
and
1000Hz)
Distortion (Input section and filter)
:
<
0,01
%
(60Hz to 50 kHz)
<
0
,03%
(20Hz to 100kHz)
Bandwidth Compensation:
Automatic 1
/
vB
compensation
Weighting Networks:
Curves A
,
B and C in accordance with
IEC standard (IEC 179)
Curve
0
in accordance with proposed
standard
Output Section
:
Input
Impedance
(from
ext.
filter)
:
1461<0
Output Amplifier Gain: 80 dB
Output
Attenuator
Range:
60 dB
in
10 dB steps
Accuracy of steps
±
0.1 dB relative to the
x 1 position at 1 kHz
Meter:
Full Scale deflection: 1 0 V RMS at Re-
corder Output (l inear)
31.6 V RMS at Recorder Output (logarith
-
mic)
Scale range (log
mode):
50 dB
Averaging times:
"Fast"
and
"
Slow"
ac-
cording to IEC 179 and 0
, 1;
0
,3; 1; 3;
10; 30; 1 00s
Scales: Interchangeable, for direct read
-
ing of voltage
,
dB
,
dB Lin
/
Log
,
sound
le-
vel
.
acceleration
,
power spectral
density,
absorption coefficient
.
dB
/
dBm
.
using
dif-
ferent
transducers
and
accessories
.
Scales can be custom made to order
Recorder Output:
AC:
Output voltage: 1 0 V RMS at fu'll
deflec-
tion (linear meter mode)
Max.
voltage: 50 V Peak
Output impedance: 500 in series with
32J1F
Load impedance:
~
1 2 kO
Frequency of Output Signal: 30kHz (in
316Hz
and
1000Hz
bandwidth)
750Hz (3
,
16 -
100Hz bandwidth) -
signal frequency in linear and A, B. C
and 0 filter mode
DC Linear
mode:
Output voltage: 4
,
5 V at full deflection
~
10V RMS AC
Max. voltage: 1 5 V
Dynamic range: -50 dB to + 1 0 dB re
fu II meter deflection
Crest factor
capability:
Up to 5 at full
deflection decreasing to 1 .4 at
+
1 0 dB
Accuracy of RMS indication:
±
0 ,5 dB
for crest factors up to 5
Linearity of RMS indication:
±
0 ,3 dB in
the range -40 dB to 0 dB and
±
0, 5 dB
over the entire range
Output impedance:
<
1 0 0
Load impedance:
~
5 kO
Averaging times: 0,1
;
0,
3; 1; 3;
1
0; 30;
100s
DC Logarithmic mode:
Output
voltage:
4,5 V at full deflection
~
31,6 V AC.
Lin/
log conversion ratio
0 ,09 V
(DC)/
dB (AC)
Dynamic
range:
-50 dB
to
0 dB
re
4,5V
Crest factor capability:
Up
to
5 at
-1 0 dB decreasing to 1.4 at 0 dB
Accuracy of RMS indication:
±
0,5 dB
for crest factors up to 5
Linearity:
±
0 ,5 dB
Output impedance:
<
1 0 0
Load impedance:
~
5 kO
Averaging times: As for linear mode
AFC
:
Active
in the
Bandwidths
3
.
16Hz to
100Hz
"PULL IN"
Range:
10Hz to 1 kHz de-
pending
on
bandwidth
and frequency
range
.
See table inside leaflet
Overload Indicators:
Overload indicators for input and output
amplifiers
Lamps light for overload pulse longer
than 0
,
2 ms
,
remain lit for min. 0
,
5 s
Relay output of overload function
Reference Voltage (built-in
oscillator):
50 mV RMS at 1000Hz sinusoidal
Amplitude
stability:
±
0 ,2 dB
Frequency stability:
±
2%
Distortion:
<
2%
B
&
T Program:
Automatic
switching
of
bandwidth
B
and averaging time T (see text)
.
Input
socket for external control
11
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