Manual Supplement 175, 177 & 179 Users
2 7/10
Change #2, 55420
On page 14, add the following table to the bottom of the page:
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.