Philips PM2521 Service Manual page 151

3
2.1.4.
Alternating current
measurements
Ranges
Maximum
input current
in
range
20
A
Resolution
Number
of
representation units
Accuracy
(valid
between
3
%
and 100
%
of range)
Temperature coefficient
Voltage
drop over
shunt
AC
detector
Crest factor
Response time
Protection
Maximum Common
Mode
voltage
Maximum
input voltage
fiA
2
20
200
mA
2
20 200
A
2
20
10
A
1
nA
in
range 2 iiA
Measured value
less
than 0.5
%
of range
is
displayed as
zero
2100
40 Hz
-
200 Hz ±
(0.4
%
of reading
+0.15
%
of range)
+
(0.03
%
of reading
/°C
+
0.01 of range
/°C)
Range Voltage
drop
Frequency
2 iuA
20
mA
200
pA
2
mA
<
2.5
mV
50
Hz
20
mA
200
mA
<
25
mV
2
A
20
A
<
250
mV
RMS
convertor, ac
coupled
2
at
range
end
1
s
without ranging
3
s
including ranging
Range
2
ijlA-20
mA;
250
V
rms
Range 200
mA
-
20
A
are
not protected
Imax. = 20
A
for
20 seconds
400
V
rms,
560
V
peak
In
all
ranges;
Between
Hi
and Lo
250
V
rms
Between
Hi
and
earth
400
V
rms
Between Lo and earth
400
V
rms
2.1.5.
dB measurements
(valid
in
function
V~
rms)
Range
0
dB
reference
Resolution
Number
of representation units
Accuracy
-57,7
dB
. . .
+57,7
dB
1
mW
in
600
L2,
0.775
V
or
when
selecting
the relative
reference function
with
pushbutton
ZERO
SET
at
the
front of the
PM
2521
0.1
dB
Measured value
less
than
-57.7
dB
is
displayed as
-99.9 dB
999
Signals
Frequency
Accuracy
-31,7
dB
...
+47 dB
40 Hz-
20kHz
20
kHz
-
100
kHz
±
0.2
dB
±
1
dB
-50
dB...-31,7dB
40
Hz-
20kHz
+
2
dB
-57,7
dB
...
-50 dB 40
Hz
-
20
kHz
±3
dB
>
+47 dB
40
Hz
-
500
Hz
±
1,5dB