Omega Engineering OMB-CHARTSCAN 1400, User Manual

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API Commands Appendix A
A-42 ChartScan User’s Manual
M#
- Set Measuring Mode
TYPE System
EXECUTION Deferred
SYNTAX
M#mode
Specify measuring mode. Valid options for
mode
are:
0
- Line cycle
integration / high-speed multi-channel mode, and
1
- Single channel high-
speed burst mode.
DESCRIPTION
The Set Measuring Mode (
M#
) command selects one of the two internal measuring modes supported by the
ChartScan/1400 units:
Normal Mode (for Line Cycle Integration and High-Speed Multi-Channel applications). Normal mode is the
system default. In this mode each channel is averaged over a selected number of samples as specified with the
Set Averaging Weight (
W#
) command. As there are 32 samples per line cycle, 32, 64, 128, or 256 samples will
automatically enable line cycle noise rejection.
Thermocouples and DC Volts are averaged over the specified number of samples. For AC Volts, the root mean
square (RMS) is computed over the specified number of samples.
High-speed, Single-Channel Mode (Burst mode) is used to sample a single channel at a frequency specified
by the Set Frequency (
F#
) command. The channel is sampled in blocks of 256 readings, with the number of
blocks specified by the Set Counts (
Y
) command.
Refer to Measuring Mode section of Appendix B for more detailed information.
EXAMPLES
PRINT#1, “OUTPUT07;M#0X”
‘ Select Line Cycle Integration/High-Speed Multi-Channel Mode
PRINT#1, “OUTPUT07;W#32X”
‘ Select number of samples = 32
PRINT#1, “OUTPUT07;Y0,10,0”
‘ 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
PRINT#1, “OUTPUT07;M#1X”
‘ Select Single Channel High-Speed Burst Mode
PRINT#1, “OUTPUT07;F#10000.0X”
‘ Set sampling frequency = 10 KHz
PRINT#1, “OUTPUT07;Y0,4096,0”
‘ Set count to take 1 MB’s worth of samples
PRINT#1, “OUTPUT07;C1,26X”
‘ Select channel 1 for reading 250 Volts AC samples
PRINT#1, “OUTPUT07;T1,8,0,0X”
‘ Arm the unit
PRINT#1, “OUTPUT07;@X”
‘ Trigger unit and collect scans