Specifications

Signametrics 108
OOP or
ED_LOOP the Trim DAC is also used, which augments the 12 bit DAC to
e bits. Open loop updates are very quick. In ClosedLoop mode the
sted every time the DMM is read, making small corrections until the
voltage. However, for the ClosedLoop mode to update the
ry to read the DMM multiple times. See DMMSetDCVSource
for more details.
Parame
Remarks This Secondary function sets the DC and AC voltage sources to either OPEN_L
CLOSED_LOOP. In CLOSED_LOOP the sources use the main 12 bit source DAC. In
CLOS
produce 16 effectiv
source level is adju
reading is equal to the set
source level, it is necessa
and DMMSetACVSource
ter
Type/Description
Ms are numbered starting with zero.
iMode
Return Value ger error co
nDmm
int Identifies the DMM. DM
int Source adjustment mode: CLOSED_LOOP or OPEN_LOOP
Inte de.
Value
Meaning
DMM_OKAY
Oper
Negative Value
Error
DMMSetSynchronized
SMX2040 ; SMX2042 ; SMX2044 ;
escript Enable or disable Synchroneous operation of the DMM.
#include "sm204032.h"
ronized(int nDmm, BOOL bSync)
he Synchronized operation of the DMM. Default
ect the Synchronized mode when it is necessary to
itions from one reading to the next, and maintain the accuracy
priate for VDC, Ohms, Leakage, DCI, Diode and Guarded
zed mode is a reduced measurement rate. To run
er.
Parame
ation successfully completed.
code
Example
DMMSetSourceMode(0, CLOSED_LOOP); // Select closed loop mode
D ion
int DMMSetSynch
Remarks This function enables or disables t
operation is non-synchronized. Sel
settle full scale input trans
of the DMM. This is appro
Ohms. The result of the synchroni
synchronized, reading rate must be set to 10 rps or high
ter
Type/Description
int Identifies the DMM. DMMs are numbered st
nDmm
arting with zero.
bSync
BOOL Determines whether or not synchronized operation is enabled.
TRUE enables and FALSE disables synchronization. The default is
FALSE.
Return Value return value ing constants.
The is one of the follow
Value
Meaning
DMM_OKAY
Negative Value
Error code
Function succeeded.
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