Trend Display Mode Basics; Using Trend Mode Softkeys - Fluke 867B User Manual

867B/863
Users Manual

Trend Display Mode Basics

Trend can be used in VAC, VDC, mV DC, Ohms,
Amps, and mAµA functions. This mode uses the
graphical window to plot 120 data points over a
selectable time ranging from 1 second to 15 minutes.
Each data point can represent an actual reading, an
average of readings, or a pair of high and low
readings. You can also enable serial output of the
data points as they occur.

Using Trend Mode Softkeys

Enable Time Time
RS232 Longer Shorter
1 (Enable RS232) starts transmitting readings
(with time stamps) with the first press and stops
transmitting with the second press. (You can also
press F to stop transmission.) The time stamp
(hours:min:sec) resets each time RS232 is enabled.
The time rolls over at 24 hours. Refer to Chapter 6
for serial output connection descriptions.
2 or 3 (Time Longer, Time Shorter) selects
the interval to use on the horizontal scale as data
5-10
Trend >
Restart
Type Trend
points are plotted on the trend graph. (Seconds: 1, 2,
5, 10, 15, 30, 45; Minutes: 1, 2, 5, 10, 15)
For "Sampled" and "Average" Trend Type selections,
the GMM plots the most recent 120 data points. For
"High Low" Trend Type, 120 data point pairs are
plotted. Earlier data points are not stored.
4 (Trend Type) accesses the Trend Type
softkeys, allowing you to plot average, sampled, or
high/low excursions of the measurement value.
5 (Restart Trend) starts plotting a new trend
graph as new samples are acquired. Primary
readings are displayed and plotted; there are no
secondary readings in Trend Mode.
Trend Mode Considerations
Only the value being trended is shown in the primary
display. For example, a "dB" or "Rel" value that
normally occupied the primary display in DC Volts
function will be replaced with a VDC reading.
Frequency values do remain in the primary display
during Trend.
The vertical scale in the Trend display depends on
the range setting and the type of measurement. A