Operator`s manual

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100

99 Signametrics

level.

Volts)

e measurement of the output voltage. This function acts on

the main 12 bit source DAC. If better accuracy is needed it can be accomplished by

ecting the Cl MMSetSourceMode). This mode engages the Trim

DAC, which augments the 12 bit DAC to produce 16 effective bits. In ClosedLoop

mode, the sourc tions

until the reading is equal to ldVolts. However, for the ClosedLoop mode to update the

source level, it t

exceed 10 rps when using the Closed Loop mode. The DMM reads voltages using the 33

eter

Description Set the DCV source output

#include "sm204032.h"

#include "UserDMM.h"

int DMMSetDCVSource(int nDmm, double ld

Remarks This Secondary function sets the DC voltage source to ldVolts. The DMM must be in

VDC_SRC for this function to execute properly. When the DMM is in VDC_SRC

operation, and the DMMSetDCVSource is applied, reading the DMM (DMMRead or

DMMReadStr) will return th

sel osedLoop mode (D

e level is adjusted every time the DMM is read, making small correc

is necessary to read the DMM multiple times. Update rate should no

V range.

Param Type/Description

nDmm

int Identifies the DMM. DMMs are numbered starting with zero.

voltage to be set. Can be –10.5 to 10.5 V

Return Value or co

ldVolts

double DC

Integer err de.

Value Meaning

DMM_OKAY

Operation successfully completed.

1.25); // Set source to 1.25V

, CLOSED_LOOP); // Closed loop mode

; // update 100 times

SetExter

SM2040  SM2042 

Description Set the value of the leakage function external shunt

#include "sm204032.h"

int DMMSetExternalShunt(int nDmm, double ldShunt)

Remarks This Secondary function sets the value of the external shunt resistor being used. The

d in measurement functions such as Leakage and Extended

resistance, Synthesized resistance etc. It is available with S/W versions 1.75 or higher.

ldShunt set t value, such that 10,000.0 correxponds to a 10k

Ω shunt.

Negative Value

Error code

Example

double reading; int I;

DMMSetDCVSource(0,

DMMSetSourceMode(0

for(I=0;I<100;I++) DMMRead(0,&reading)

DMM nalShunt

SM2044 ;

shunt value is utilize

s the shun

Parameter Type/Description

nDmm

int Identifies the DMM. DMMs are numbered starting with zero.