Fluke 867B User Manual page 78

unipolar arrangement (0 to full scale) is used for
VAC, AAC, and frequency. Bipolar readings
(negative to zero to positive) are used for VDC and
Ohms.
RS232 Trend Output Format
Trend data for each data point is sent out as it is
measured. ASCII format is used, as follows:
•
For "Sampled" or "Average" Trend Type:
[Value] [Units] [Time Stamp] <cr> <lf>
•
For "High Low" Trend Type:
[Value High] [Units] [Time Stamp] <cr> <lf>
[Value Low] [Units] [Time Stamp] <cr> <lf>
•
For "Glitch" Trend Type (Ohms only), the
following line is added at the end of each
"Sampled" or "Average" line or pair of lines:
[Glitch State] [Time Stamp] <cr> <lf>
[Time Stamp] is in hh:mm:ss format, representing
time since the Trend start. Time rolls over at 24
hours.
Using View and Trend Display Modes
Using Trend Mode Softkeys
Selecting the Trend Type
Average Sampled
1 (Average) plots the average of all samples
taken by the GMM during the plot interval.
2 (Sampled) plots the last sample taken by the
GMM at the time the data point is plotted.
3 (High Low) plots the maximum and minimum
sample value taken during the time interval. A
vertical bar where the bottom end represents the
lowest sample and the top end represents the
highest sample is placed on the plot.
4 (Normal Glitch) selects "Normal" or "Glitch" in
Ohms function only. Glitch setting display and
highlight fast-occurring discontinuities on the trend
line. Markers along the bottom of the display identify
discontinuities as they appear on the Trend Plot. A
discontinuity is recorded when the measured
resistance rapidly passes (decreasing or increasing)
through a low resistance continuity point. Each range
uses a different continuity point (See Continuity
Beeper Values in Chapter 8 of this manual). Note:
When Glitch is first enabled, the GMM sets manual
5
High Normal
Low Glitch Exit
5-11