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
Summary of Contents for OMB-CHARTSCAN 1400
Page 1: ...August 2002 OMB CHARTSCAN 1400 Portable Data Recorder p n OMB 483 0901 Rev 3 1...
Page 6: ...iv ChartScan User s Manual...
Page 24: ...ChartScan User s Manual...
Page 32: ...2 8 General Information ChartScan User s Manual Notes...
Page 56: ...3 24 ChartScan User s Manual Notes...
Page 124: ...6 20 Calibration ChartScan User s Manual...
Page 126: ...A ii ChartScan User s Manual...
Page 136: ...API Commands Appendix A A 10 ChartScan User s Manual Notes...
Page 176: ...API Commands Appendix A A 50 ChartScan User s Manual...
Page 230: ...Appendix C Registers Data Formats Queries ChartScan User s Manual C 13...
Page 237: ...Registers Data Formats Queries Appendix C C 20 ChartScan User s Manual Notes...
Page 257: ...E 2 ChartScan User s Manual Notes...
Page 265: ...ASCII Code Summary Appendix F F 8 ChartScan User s Manual Notes...
Page 269: ...Abbreviations Appendix H H 2 ChartScan User s Manual Notes...
Page 271: ...ChartScan User s Manual...