Fluke 87 III Manuel d'utilisateur télécharger pdf (Page 56)

80 Series III

Users Manual

Table 17. Frequency Counter Sensitivity and Trigger Levels

Minimum Sensitivity (RMS Sinewave) Approximate Trigger Level

Input Range

5 Hz - 20 kHz 0.5 Hz - 200 kHz (DC Voltage Function)

400 mV dc

4 V

40 V

400 V

1000 V

70 mV (to 400 Hz)

150 mV

0.3 V

3 V

30 V

300 V

70 mV (to 400 Hz)

150 mV

0.7 V

7 V (≤140 kHz)

70 V (≤14.0 kHz)

700 V (≤1.4 kHz)

40 mV



1.7 V

4 V

40 V

400 V

Duty Cycle Range Accuracy

0.0 to 99.9% Within ±(0.05% per kHz + 0.1%) of full scale for a 5 V logic family input on the 4 V dc range.

Within ±((0.06 x Voltage Range/Input Voltage) x 100%) of full scale for sine wave inputs on ac voltage ranges.

1. Maximum input for specified accuracy = 10X Range or 1000 V.

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Fluke 87 III Manuel d'utilisateur Page 56