Instruction 3015-4275
53
Working with the Trend Screen
Overview - Log Interval
The AGM300 retains a data log of 100 measurements for each zone. The log interval is the number of minutes
from 1 to 1440 between each log point. This parameter can be changed from the
Zone Setup #1 Screen
(Page 41).
The default setting for this parameter is 1440 minutes (24 hours). If the log interval time is set to 0, then a
measurement is recorded in the trend log after
every measurement cycle
. Therefore, after the trend log is filled it
will contain the last 100 measurement points for a zone. If you want the data logged less frequently you should
increase this value. It is important to remember that cycle time is dependent on many factors, including the
number of zones being monitored, input line length, and the run zeroing mode selected. Before changing this
value it may be useful to first review the log data using the
Trend Screen
to determine the nominal cycle time.
Navigating To the Trend Screen
Access the
Trend Screen
from either the
System Screen
or
Zone Screen
as follows:
• From the
System Screen
(Page 31) press the key adjacent to the AGM300 unit associated with the zone you
wish to work with to display that monitor's
AGM Setup Screen #1.
Next, press the ZONES key to go to
Zone
Setup Screen #1
, and then press the TREND key at the bottom of the display to go to the
Trend Screen
.
• From the top level
Zone Screen
(Page 44) press the key adjacent to the zone you wish to work with to first
display its
Zone Setup Screen #1
. Then press the TREND key at the bottom of the display to go to the
Trend
Screen
.
Trend Screen
The trend graph opens with the cursor located over the most recent data point. Use the LEFT/RIGHT cursor
keys to move the cursor to different data points. Holding a key down will cause cursor to move rapidly across
the screen. As you move the cursor position, the date and time of that reading, along with the PPM value, are
displayed at the top of the screen above the graph. The trend graph is automatically scaled to accommodate
the largest PPM value displayed. The ZOOM OUT and ZOOM IN keys allow you to adjust the vertical scale of
the graph.
The trend data is stored on a first-in, first-out basis. After 100 trend values have been stored the 101
st
value will
replace the first value stored. Therefore, in normal operation, when entering the trend mode the cursor will be
located at the most recent data point. The data points to the left of the initial cursor location will be the next
most recent. The data point to the right will be the oldest data point in the buffer and will be over written by the
next data point.
Summary of Contents for ADM800
Page 17: ...Instruction 3015 4275 9 AGM300 AC Input Power and Ground Connections...
Page 33: ...Instruction 3015 4275 25 ADM800 AC Input Power and Ground Connections...
Page 70: ...62 Instruction 3015 4275 Notes...
Page 71: ...Instruction 3015 4275 63 Appendix...
Page 74: ...66 Instruction 3015 4275 ADM800 Logic Diagram...
Page 93: ...Instruction 3015 4256 85 Notes...
