53
Signametrics
Value Meaning
DMM_
y term
Negative Value
Exa
(0,64);
while( ! DMMReady(0));
Buffer[i] = DMMReadBuffer(0);
DMMBurstBu
;
SMX2042
Remarks
M
.
y
returns TRUE, it should not be used again until the buffer is read,
ing when it detects a ready
dition.
ter
OKAY
Operation successfull
inated
Error code.
mple
double
Buffer[64];
DMMArmTrigger
for(i=0; i < 64 ; i++)
ffRead
;
SMX2044
;
SMX2040
Description
Setup the DMM for Triggered operation.
#include "sm204032.h"
#include "UserDMM.h"
int
DMMBurstBuffRead(int
nDmm, int iSettle, int iSamples)
Following reception of this command the DMM enters a burst read mode, where it takes
iSettle
+ 1 readings at the set measurement function, range, and reading rate; and saves
the last reading to the on-board buffer. This process repeats for
iSamples
. No other DM
command should be issued to the DMM until the it completes the operation, and the
buffer is read. One exception is the
DMMDisarmTrigger
command, which terminates
the process. No autoranging is allowed in this mode. This function is usable for VDC,
VAC, Ohms, IAC, IDC, and RTD measurements. Measurement rate should be set to
10rps or higher. The total time it takes to complete this process is equal to
iSamples
* (
iSettle
+ 1) / (measurement rate).
Use the
DMMReady
to monitor if the has completed the operation, and is ready. When
ready, read up to
iSamples
, using
DMMReadBuffer
or
DMMReadBufferStr
functions
Once
DMMRead
since it clears som
con
e flags in preparation for buffer read
Parame
Type/Description
iDmm
int
Identifies the DMM. DMMs are numbered starting with zero.
iSettle
int
The number of settling measurements prior to read value. Mu
set between 0 and 250. Recommended value is 4.
int
The nu
st be
iSamples
mber of samples the DMM takes following the same
ber must be between 1 and 64,
Return Value
The return valu
he following constants.
number of trigger pulses. This num
inclusive.
e is one of t
Value Meaning
DMM_OKAY
Operation successfully terminated
Example
Negative Value
Error code.
double
Buffer[50];
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