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Users Manual

Frequency Counter Specifications

Function Range Resolution Accuracy

99.999 Hz 0.001 Hz 0.02 % + 5

999.99 Hz 0.01 Hz 0.005 % + 5

9.9999 kHz 0.0001 Hz 0.005 % + 5

99.999 kHz 0.001 Hz 0.005 % + 5

[1]

Frequency

(0.5 Hz to 999.99 kHz, pulse

width >0.5 μs)

999.99 kHz 0.01 Hz 0.005 % + 5

Duty Cycle

[2][3]

1.00 % to 99.00 % 0.01 % 0.2 % per kHz + 0.1 %

0.1000 ms 0.0001 ms 0.002 ms + 3 counts

1.000 ms 0.001 ms 0.002 ms + 3 counts

10.00 ms 0.01 ms 0.002 ms + 3 counts

Pulse Width

[2][3]

1999.9 ms 0.1 ms 0.002 ms + 3 counts

[1] For 64.000 kHz to 67.000 kHz, accuracy = ±5 Hz, at -20 to +55 °C with R.H. 0 % to 90 % (0 °C to 37 °C), 0 % to 65 % (37 °C to 45 °C), 0 % to 45 %

(45 °C to 55 °C).

[2] For rise times <1 μs. Signals centered around trigger levels.

[3] 0.5 to 200 kHz, pulse width >2 μs. Pulse width range is determined by the frequency of the signal.

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Fluke 289 Manual do Utilizador Página 84