Signametrics
112
Remarks
This function makes a single resistance reading. The funciton uses the value of C to help
measure the resistance in series with it. If C is unknown enter 0.0 for C. The
measurement result is stored as double-precision floating-point numbers in the location
pointed to by
lpdR
. The DMM must be set to the ESR function during this operation. It
assumes that an DMMOpenCalACCaps() was performed prior to using this funciton.
Note: Avilable with DLL Version 1.52 and higher.
Parameter Type/Description
nDmm
int
Identifies the DMM. DMMs are numbered starting with zero.
dC
double
Phas the nominal value of the capacior. Can be set to a value
between 0 and 1uF (1.0e-6).
lpdDcy
double *
Points to the location which holds the duty cycle.
Return Value
The return value is one of the following constants.
Value Meaning
DMM_OKAY
Operation successfully completed.
Negative Value
Error code
Example
double
R;
DMMReadSR(0, 47e-9, &R); // Read the resistor in series with
47nF
DMMReadFrequency
SMU2060
SMU2064
Description
Return the next double floating-point frequency reading from the DMM.
#include "SMU2060.h"
int DMMReadFrequency
(
int
nDmm,
double
*
lpdResult
)
Remarks
This is function, that is the DMM must be in ACV measurement function, and a valid
range must be selected for proper operation. If the frequency counter is not engaged,
select it. Make a single frequency measurement, and store the result as a 64-bit double-
precision floating-point number in the location pointed to by
lpdResult
.
See
DMMFrequencyStr()
for more details. In cases where the of frequency being measured
is approximately known, use
DMMSetCounterRng
to select the appropriate range. This
will eliminate the self ranging of the counter, resulting in a single measurement to
acquire the frequency.
Parameter Type/Description
nDmm
int
Identifies the DMM. DMMs are numbered starting with zero.
lpdResult
double *
Points to the location to hold the frequency.
Return Value
The return value is one of the following constants.
Value Meaning
DMM_OKAY
Operation successfully completed.
