Specifications

Signametrics 98
SMX2040  SMX2044 ;
Description Th
" "
" .h"
em dary function sets the output of the Threshold DAC. To use this function, the
be in AC volts. This function sets the detection threshold of the AC
mpared by the comparator to the AC coupled input voltage. This
function is associated with the following functions: Totalizer, Frequency counter, Period,
urements. ldThreshold range is determined by the
lected ACV range. For instance, when the 250 V AC range is selected, the allowed
00 V to +500 V. See the specification section for more details.
Parameter
DMMSetCompThreshold
Set the reshold DAC level.
#include
#include
sm204032.h
UserDMM
int DMMSetCompThreshold(int nDmm, double FAR ldThreshold)
R arks This Secon
DMM must
comparator. It is co
Pulse width and Duty Cycle meas
se
range of ldThreshold is –5
Type/Description
nDmm
int Identifies the DMM. DMMs are numbered starting with zero.
ldThresh
Return Value
Value
old
double FAR DC voltage to be set. Allowed range depends on
selected ACV range.
Integer error code.
Meaning
DMM_OKAY
Operation successfully completed.
Negative Value
Error code
Example
DMMSetCompThreshold(0,28.5); // Set comp. threshold to 28.5V
SMX2040  SMX2042 ; SMX2
Description fre
" "
" .h"
fr
em n forces the auto-ranging frequency counter to a specific range, frange. Use
he approximate frequency to be measured is known. It will eliminate the
he counter to autorange to the appropriate range. Saves time by
removing the requirement to make multiple frequency measurements in order to allow
defind in UserDMM.h file.
Parame
DMMSetCounterRng
044 ;
Set the quency counter to a specific range.
#include
#include
sm204032.h
UserDMM
int DMMSetCounterRng(int nDmm, int ange)
R arks This functio
this function
if t
time necessary for t
the counter to range. All ranges are
ter
Type/Description
nDmm
int Identifies the DMM. DMMs are numbered starting with zero.
frange
int The range to be set is a value between 0 and 7. See UserDMM.h
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