Fluke 87 III User Manual
Page 34
80 Series III
Users Manual
26
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.
µ
A
F
400
µ
A
Refer to the measurement tips given before this table.
^
40 mA
A
F
4 A