Black Box ServSensor JR EME102A, Руководство пользователя, Страница: 105 / 135

103
CONTENTS
103
5.4 Graphing
The graphing capabilities of the ServSensor JR are designed for
functionality: they are simple and easy to use. However if greater
flexibility is desired you should consider the use of third party graphing
tools. BLACK BOX has written a data capture utility that it includes
for no charge on the CD ROM included with the system. This utility
records the value of a sensor on a host system. It is then possible to use
a large number of third party tools to graph this data.
How much data can be graphed?
The ServSensor JR has enough memory to save 8640 data points for
each sensor. If data is recorded every 15 minutes, there is enough data
to display measurements for 90 days. If the recording is made every
minute, there is enough memory to hold data for 6 days.
Note: Whenever power is recycled the data logging is reinitialized and
all previous data is lost.
Whenever a sensor is taken off-line and then placed back online the
data logging is reinitialized and all previous data is lost.
High and low values
The High value and the low values for every period are displayed. If
the sensor is removed and a
sensorError is observed, then no value
will be recorded at that time.
Time Accuracy
The time is determined by a battery-backed clock in the ServSensor JR.
Data averaging
The data recorded is the average for the high and low value during that
period. The data is clipped at 0 and 100. Any value over 100 will
display as 100. Any value less than 0 will display as 0.