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GOSSEN-METRAWATT 3
Specifications METRA
Hit
18S
dB ranges
Measuring
function
Measuring range
METRA
Hit
18S
Resolution
Input impedance
Inherent deviation of the digital display
±(...% of meas. val. +... digits) for ref. conditions
Overload capacity
2)
Measuring
function
1) 1) 1) 1)
Overload
value
Overload
duration
V
300.00 mV 10 µV >10 G 5M//<40pF 0.05 + 3; 0.05 + 20
3)
0.5 + 30 (> 500 D)
1200 V
DC
AC
RMS
sinusoidal
cont.
V
3.0000 V 100 µV 11 M 1M//<40pF 0.05 + 3 0.3 + 30 (> 300 D)
30.000 V 1 mV 10 M 1M//<40pF 0.05 + 3 0.3 + 30 (> 300 D)
300.00 V 10 mV 10 M 1M//<40pF 0.05 + 3 0.3 + 30 (> 300 D)
1000.0 V 100 mV 10 M 1M//<40pF 0.05 + 3 0.3 + 30 (> 300 D)
dB
See table below Same as with V ± 0,5 dB
4)
dB
Voltage drop, approx.
1) 1)
mA
300.00 µA 10 nA 15 mV 15 mV 0.2 + 20 0.5 + 30 (> 300 D)
0.36 A cont.
mA
3.0000 mA 100 nA 150 mV 150 mV 0.2 + 10 0.5+ 30 (> 300 D)
30.000 mA 1 µA 30 mV 30 mV 0.05 + 10 0.5+ 30 (> 300 D)
300.00 mA 10 µA 300 mV 300 mV 0.2 + 10 0.5 + 30 (> 300 D)
A
3.0000 A 100 µA 150 mV 150 mV 0.5 + 10 0.75 + 30 (> 300 D)
12 A
5)
5 min
A
10.000 A 1 mA 400 mV 400 mV 0.5 + 10 0.75 + 30 (> 300 D)
No-load voltage Short circuit current
300.00 10m max. 4.00 V max. 1 mA 0.1 + 6; 0.1 + 30
3)
500 V
DC
AC
RMS
sinusoidal
10 min
3.0000 k 100 m max. 1.25 V max. 100 µA 0.1+6
30.000 k 1 max. 1.25 V max. 10 µA 0.1+6
300.00 k 10 max. 1.25 V max. 1 µA 0.1+6
3.0000 M 100 max. 1.25 V max. 0,1 µA 0.1+6
30.000 M 1k max. 1.25 V max. 0,1 µA 1.0+6
3.0000 V– 1mV max. 4.00 V 0.2+6
Discharge resist. U
0 max
F
3.000 nF 1 pF 1.5 M 4V 1.0 + 8; 1.0 + 60
3)
500 V
DC
AC
RMS
sinusoidal
10 min
F
30.00 nF 10 pF 1.5 M 4V 1.0 + 8; 1.0 + 30
3)
300.0 nF 100 pF 150 k 4V 1.0 + 3
3.000 µF1nF 150 k 4V 1.0 + 3
30.00 µF10nF 15 k 2V 1.0 + 3
300.0 µF 100 nF 1.5 k 2V 5.0 + 6
3000 µF1µF 1.5 k 2V 5.0 + 6
10000 µF10µF 1.5 k 2V 5.0 + 6
f
min
6)
Hz
300.00 Hz 0.01 Hz 10 Hz
0.1 + 3
7)
3kHz:
1200 V
cont.
Hz
3.0000 kHz 0.1 Hz 10 Hz
30 kHz:
30.000 kHz 1 Hz 10 Hz
300 V
100.00 kHz 10 Hz 100 Hz
100 kHz:
30 V
°C
Pt
100
– 200.0 ...
+ 100.0 °C
0.1 °C 0.5 Kelvin + 3
8)
500 V
DC
AC
eff
sinus
10 min
°C
+ 100.0 ...
+ 850.0 °C
0.1 °C 0,5+3
8)
Pt
1000
– 100.0 ...
+ 100.0 °C
0.1 °C 0.5 Kelvin + 3
8)
+ 100.0 ...
+ 850.0 °C
0.1 °C 0.5+3
8)
Measuring ranges
Display span at reference voltage
U = 0.775 V
Display span at reference voltage
U
ref
(V)
300 mV
3V
30 V
300 V
1000 V
– 48 dB ... – 8 dB
– 38 dB ... + 12dB
– 18 dB ... + 32 dB
+ 2 dB ... + 52 dB
+ 22 dB ... + 63 dB
– 40 dB ...+ 110 dB
– 60 dB ...+ 100 dB
– 80 dB ... + 80 dB
– 100 dB ... + 60 dB
– 110 dB ... + 40 dB
Display (dB) =
20 lg U
x
(V) / 0.775 V
Display (dB) =
20 lg U
x
(V) / U
ref
(V)
1) TRMS measurement
2) At –10 °C...+40°C
3) With zero setting; w/o zero setting
4) At a resolution of 0.01 dB
5) 16 A for 30 s
6) Lowest measurable frequency with sinusoidal measuring signal symmetrical to zero
7) Range 3 V : U
E
=1V
rms
. . . 10 V
rms
30 V : U
E
=10V
rms
. . . 100 V
rms
300 V :U
E
= 100 V
rms
. . . 1000 V
rms
8) Without sensor
Analog-digital multimeters
METRA 18S
3


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