Fluke 28IIEX Fluke 28IIEx User Manual - Page 42

Table 7. Functions and Trigger Levels for Frequency Measurements, Function, Range, Approximate

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28 II Ex Users Manual Function Table 7. Functions and Trigger Levels for Frequency Measurements Range Approximate Trigger Level Typical Application  6 V, 60 V, ±5 % of scale Most signals. 600 V, 1000 V  600 mV ±30 mV 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.)  600 mV 40 mV Refer to the measurement guidelines given before this table. V 6 V 1.7 V 5 V logic signals (TTL). V 60 V 4 V Automotive switching signals. V 600 V 40 V Refer to the measurement guidelines given before this table. V 1000 V  100 V Frequency counter characteristics are not available or specified for these functions.  μA All ranges ±5 % of scale 600 μA, 6000 μA 30 μA , 300 μA AC current signals. Refer to the measurement guidelines given before this table.  A 60 mA, 400 mA 3.0 mA , 30 mA 6 A, 10 A .30 A, 3.0 A 32

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28 II Ex
Users Manual
32
Table 7. Functions and Trigger Levels for Frequency Measurements
Function
Range
Approximate
Trigger Level
Typical Application
6 V, 60 V,
600 V, 1000 V
±
5 % of scale
Most signals.
600 mV
±
30 mV
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.)
600 mV
40 mV
Refer to the measurement guidelines given before this table.
V
6 V
1.7 V
5 V logic signals (TTL).
V
60 V
4 V
Automotive switching signals.
V
600 V
40 V
Refer to the measurement guidelines given before this table.
V
1000 V
100 V
Frequency counter characteristics are not available or specified for these functions.
All ranges
±
5 % of scale
AC current signals.
μ
A
600
μ
A, 6000
μ
A
30
μ
A , 300
μ
A
Refer to the measurement guidelines given before this table.
60 mA, 400 mA
3.0 mA , 30 mA
A
6 A, 10 A
.30 A, 3.0 A