Fluke 87 III Manual de usuario descargar pdf (Pagina 34)

80 Series III

Users Manual

Table 7. Functions and Trigger Levels for Frequency Measurements

Function Range

Approximate

Trigger Level Typical Application

K 4 V, 40 V, 400 V,

1000 V

0 V Most signals.

K 400 mV 0 V High-frequency 5 V logic signals. (The dc-coupling of the L function can

attenuate high-frequency logic signals, reducing their amplitude enough

to interfere with triggering.)

L 400 mV 40 mV Refer to the measurement tips given before this table.

L 4 V 1.7 V 5 V logic signals (TTL).

L 40 V 4 V Automotive switching signals.

L 400 V 40 V Refer to the measurement tips given before this table.

L 1000 V 400 V

ReEG Frequency counter characteristics are not specified for these functions.

\ All ranges 0 A AC current signals.

µAF 400 µA Refer to the measurement tips given before this table.

^ 40 mA

AF 4 A

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 ... 57 58

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Fluke 87 III Manual de usuario Pagina 34