Ametek Land Landmark Graphic AE, User Manual, Page: 48 / 84

Page 42
Signal Processor User Guide
LMG AE
The format of the data extraction/modifications via the serial port is identical
to that of the standard Landmark Graphic processor (see appropriate User
Guide for details).
Glossary
Tmax This is the maximum displayed value for the Snap Shot window.
Tmin This is the minimum displayed value for the Snap Shot window.
Interval This parameter sets the collection time period for the whole
Snap Shot display. (i.e. 150 points in 1.5 seconds minimum
≡1 reading every 10ms, 150 points, in 90.0 seconds maximum
≡1 reading every 600ms (1.5 sec increments).
Threshold This is the level which the measured temperature must cross
before the Snap Shot capture function is initiated.
Pre Trigger This parameter allows the user to see a fixed amount of
temperature data prior to the actual threshold being crossed.
Cursor 1 (1*) This parameter allows the user to select a point which will be
used as the primary measurement point for the
d
T calculation.
Cursor 2 (2*) This parameter allows the user to select a point which will be
used as the secondary measurement point for the calculation
of
d
T.
NOTE
The cursor positions are always taken from the threshold crossing points.
(See Fig. 27 and 28).
d
T is always calculated by subtracting cursor 2 (2*)
value from cursor 1(1*). The processor outputs live data, however, the
Snap Shot display is held on screen and is not updated until a new trigger
signal is received.
Mnemonics Description Access
STH Snapshot display temperature max value R/W
STL Snapshot display temperature min value R/W
SSI Snapshot display interval 0-5 in increments of 1 R/W
SST Snapshot display Threshold value R/W
CP1 Cursor 1 position R/W
CP2 Cursor 2 position R/W
PTV Pre trigger range R/W
CT1 Cursor 1 temperature value R
CT2 Cursor 2 temperature value R