Fluke 225C User Manual - Page 79

Table 1. Bus Test Screen Indicators, Bus Health Indicator Boundaries, MIN and +15.0 V MAX.

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Table 1. Bus Test Screen Indicators : bus activity indicators. Bus activity indicator 1: Q (filled) : voltage measured { (open) : no voltage measured Bus activity indicators 2 and 3: { { (both open) : no activity ÑÑ(blinking) : activity Busy, the test tool is measuring/processing data. No reading available. Test OK. Measurement results are within 80% of allowable range, see Figure 36. Warning. Measurement results are between 80% and 100% of allowable range, see Figure 36 Test failed. Measurement results are out of allowable range, see Figure 36. 6 Using The Bushealth Function Reading the Screen Figure 36 shows the bus health indicator boundaries. MIN MAX BAD WEAK GOOD WEAK BAD 10 % 80 % 10 % Figure 36. Bus Health Indicator Boundaries Example: 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: If the result is between 4.2 and 13.8V. (10% of 12 V = 1.2 V) If the result is between 3 V and 4.2 V, or between 13.8 V and 15 V. If the result is < 3 V or >15 V. 69

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Using The Bushealth Function
Reading the Screen
6
69
Table 1. Bus Test Screen Indicators
: bus activity indicators.
Bus activity indicator
1
:
(filled)
:
voltage measured
(open)
:
no voltage measured
Bus activity indicators
2
and
3
:
(both open)
: no activity
(blinking)
: activity
Busy, the test tool is measuring/processing
data.
No reading available.
Test OK. Measurement results are within 80%
of allowable range, see Figure 36.
Warning. Measurement results are between
80% and 100% of allowable range, see Figure
36
Test failed. Measurement results are out of
allowable range, see Figure 36.
Figure 36 shows the bus health indicator boundaries.
80 %
10 %
10 %
GOOD
WEAK
WEAK
BAD
BAD
MAX
MIN
Figure 36. Bus Health Indicator Boundaries
Example:
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:
If the result is between 4.2 and 13.8V. (10% of
12 V = 1.2 V)
If the result is between 3 V and 4.2 V, or between
13.8 V and 15 V.
If the result is < 3 V or >15 V.