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Appendix A API Commands
ChartScan User’s Manual A-61
W#
- Set Average Weight
TYPE
System
EXECUTION
Deferred
SYNTAX
W#wt
Specify the number of samples to average in the Normal mode, where
wt
is the
average weight. Valid options for
wt
are:
1
,
2
,
4
,
8
,
16
,
32
,
64
,
128
, and
256
(with
32
being the default value).
DESCRIPTION
Normal mode is used for line cycle integration for noise filtering, or for high-speed multiple channel use when
noise is not a problem. The selection for Average Weight (
W#
) determines how many samples to average for
each thermocouple or DC volts channel, or how many samples over which the root mean square (RMS) is
calculated for AC volts. As there are 32 samples per line cycle, setting
wt
to
32
,
64
,
128
, or
256
samples will
automatically enable line cycle noise rejection.
Note: Due to hardware constraints, weights greater than
128
limit the number of channels which can be active
in an acquisition to 122 channels, maximum.
Weight (wt) Maximum # of Channels
1,2,4,8,16,32, 64, 128
128
256
122
EXAMPLE
PRINT#1, “OUTPUT07;M#0X”
‘ Select line cycle integration/high-speed multi-channel mode
PRINT#1, “OUTPUT07;W#64X”
‘ Select number of samples = 64
PRINT#1,
“OUTPUT07;Y0,10,0X”
‘ Setup to read 10 post trigger scans
PRINT#1, “OUTPUT07;C1-
3,1X”
‘ Enable channels 1 - 3 for Type J thermocouples
PRINT#1,
“OUTPUT07;T1,8,0,0X”
‘ Arm the unit
PRINT#1, “OUTPUT07;@X”
‘ Trigger unit and collect scans