How To View The Bus Waveform Screen - Fluke 123B User Manual

Figure 12 shows the bus health indicator boundaries. The
high level voltage of a bus must be between +3.0 V (MIN)
and +15.0 V (MAX). Depending on the measurement
result, the displayed indicator will be:
Result is between 4.2 and 13.8V. (10 % of
f
12 V = 1.2 V)
Result is between 3 V and 4.2 V, or between
d
13.8 V and 15 V.
Result is <3 V or >15 V.
e
Figure 12. Bus Health Indicator Boundaries

How to View the Bus Waveform Screen

To view the waveform eye pattern of the bus voltage:
1. Push 3. The screen shows the eye pattern. The
screen shows the waveforms of one bit time
triggered on a positive, as well as, on a negative
edge in persistence mode.
2. Push 1 to clear the persisted waveforms and
restart to show the waveform.
hxv34.eps
3. Push  to freeze the screen. Push  again to
clear the persistence waveform and restart the
waveform eye pattern.
Industrial ScopeMeter®
Fieldbus Mode
hxv35.eps
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