Fluke 76 TRUE RMS Bedienungshandbuch Seite 43

Frequency Counter Sensitivity
Minimum Sensitivity (RMS Sine Wave)
Input Range*
500 Hz to 20 kHz 1.0 Hz to 500 Hz"
Not Applicable Not Applicable
4V ac 0.3V 0.7V
40V ac 3V 7V
400V ac 30V 70V
600V ac 300V Not Applicable
* Maximum input for specified accuracy = 10 x Range or 600V.
** Display rattle for sine waves below 500 Hz = 5 counts.
Function Overload
Protection*
V 600V dc
600V ac rms (sine)
mV 600V dc
600V ac rms (sine)
¥ 600V de
600V ac rms (sine)
600V dc,
600V rms (sine)
—- 600% dc,
600V rms (sine)
* 10° V-Hz max.
Input
Impedance
(Nominal)
>10 MQ,
<100 pF
10 MQ,
<100 pF
>10 MQ,
<100 pF
(ac-coupled)
Open Circuit
Test Voltage
<1.3V de
<3.1V de
Common Mode
Rejection Ratio
(1 KQ Unbalance)
>120 dB at dc,
50 Hz, or 60 Hz
>120 dB at dc,
50 Hz, or 60 Hz
>60 dB, dc to
60 Hz
Full Scale Voltage
To4.0MQ 40Mn
«450 mV dc «1.3V dc
560 dB at 50
Hz or 60 Hz
>60 dB at 50
Hz or 60 Hz
Short Circuit
Current
«500 pA
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