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Models 175, 177 & 179
Users Manual
14
Frequency Counter Sensitivity
Typical Sensitivity (RMS Sine Wave)
Input Range
1, 2
2 Hz to 45 Hz 45 Hz to 10 kHz 10 kHz to 20 kHz 20 kHz to 50 kHz 50 kHz to 100 kHz
Volts AC 600 mV Unspecified
3
80 mV 150 mV 400 mV Unspecified
3
6 V 0.5 V 0.6 V 1.0 V 2.8 V Unspecified
3
60 V 5 V 3.8 V 4.1 V 5.6 V 9.6 V
600 V 50 V 36 V 39 V 45 V 58 V
1000 V 500 V 300 V 320 V 380 V NA
Volts DC 6 V 0.5 V 0.75 V 1.4 V 4.0 V Unspecified
3
60 V 4 V 3.8 V 4.3 V 6.6 V 13 V
600 V 40 V 36 V 39 V 45 V 58 V
1000 V 500 V 300 V 320 V 380 V NA
AC/DC Amps mA 5 mA 4 mA 4 mA 4 mA
4
NA
A 0.5 A 0.4 A 0.4 A 0.4 A
4
NA
1. Maximum input for specified accuracy = 10X Range or 1000 V.
2. Noise at low frequency and amplitude may exceed the frequency accuracy specification.
3. Unspecified but usable depending on quality and amplitude of signal.
4. In mA and A ranges, frequency measurement is specified to 30 kHz.