Specifications

Signametrics 50
parameters on your DMM are set up as follows:
• Temperature units are set to
°C
the S s/CVI®
When using the SMX2040 DLL wi ou should read the LabWin.txt file included with the
software diskette.
ication of
ions measur
NOTE: Although these me
Test Executive, they are no
/* function: measure_ohms
int measure_ohms(double
short ret, i;
DMMSetFunction
DMMSetAutoRan
/* to settle auto-ra
for( i = 0 ; i < 4 ; i+
return ret;
}
int measure_vdc(double Vr
short ret, i;
DMMSetFunction
DMMSetAutoRan
/* to settle auto-ra
for( i = 0 ; i < 4 ; i+
return ret;
}
fter initialization, the Windows DLL default modes and A
• Autoranging: Off
• Function: DC Volts
• Range: 330V
• Relative: Off
• Synchronized Mode: Off
• Measurement rate: 10 rps
•
Offset Ohms: Off
Peak.
•
AC Caps level: 0.45V
5.5 Using MX2040 DLL with LabWindow
th LabWindows/CVI, y
An example appl SMX2040 DLL calls from LabWindows/CVI ® is shown below. It
contains funct e_ohms() and measure_vdc(), with sample calls to the SMX2040.
asurement functions use LabWindows/CVI® and the LabWindows/CVI(R)
t necessarily coded to LabWindows® instrument driver standards.
, purpose: measure 2-wire ohms */
OHMreading) {
s (0, OHMS2W);
ge (0, TRUE);
nge and function changes ignore three readings */
+ ) ret = DMMReadNorm (0, & OHMreading);
/* function: measure_vdc, purpose: measure DC Volts */
eading) {
(0, VDC);
s
ge (0, TRUE);
nge and function changes ignore three readings */
+ ) ret = DMMReadNorm (0, &Vreading);
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