Introduction and Specifications
Specifications 1
1-7
Table 1-1. Specifications (cont)
Frequency Counter Sensitivity and Trigger Level
Input Range*
Minimum Sensitivity (RMS Sine Wave)
500 Hz to 20 kHz 1.0 Hz to 500 Hz**
400 mV ac 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*
Input
Impedance
(Nominal )
Common Mode
Rejection Ratio (1
KΩ Unbalance)
Normal Mode
Rejection
600V dc
600V ac rms (sine)
>10 MΩ,
<100 pF
>120 dB at dc,
50 Hz, or 60 Hz
>60 dB at 50
Hz or 60 Hz
600V dc
600V ac rms (sine)
10 MΩ,
<100 pF
>120 dB at dc,
50 Hz, or 60 Hz
>60 dB at 50
Hz or 60 Hz
600V dc
600V ac rms (sine)
>10 MΩ,
<100 pF
>60 dB, dc to
60 Hz
(ac-coupled)
Ω Open Circuit
Test Voltage
Full Scale Voltage Short Circuit
Current
< 4.0 MΩ <40 MΩ
600V dc,
600V rms (sine)
<1.3V dc <450 mV dc <1.3V dc <500 uA
Diode Test
600V dc,
600V rms (sine)
<3.1V dc 2.45V dc 800 uA typical
*10
7
V-Hz max.
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