Signametrics
48
****
* M
" /D "_CONSOLE" /D "_MBCS"
040.pch" /YX /Fo"Release/" /Fd"Release/" /FD /c
* C
032.DLL and SM204032.LIB to the project directory.
*
****
// #d
#inc
#inc
#ifde
#define _W
#end
#inc
// functions declarations and error codes.
#inc
// All functions, range and rate info and function declarations.
int m
// Address first DMM in the system
char
,"C:\\sm40cal.dat");
// initialize SMX2044, and read calibration file
alization ERROR !", "Startup SM204032 DLL",MB_OK);
// Error
m,VDC);
// Set to DCV function
,_30V);
// and to 33V range
E_10);
// 60 samples per sec
//
Clear
string
store
// take 5 readings
DMMReadStr(nDmm,
ead);
//
read
strcat(strMsg,Read);
//
Append
each
reading
// insert space between readings
DC",MB_OK);
// Show readings
5.3
on Pane App
The
e control panel for the SMX2040 DMM.
Dur
he hardware before the front panel is
displ
The
abeled
V,
I
, etc. control the DMM function. As you push a function, the front panel application
will sw
ge an
de is selected by pushing the
AutoRange
chec
the D
me state prior to operation. (This is an
inte
er
t from
dards and writes to the
SM
rrect fo
e to changes in operating
temp
The
eq.
and
per
check boxes are context sensitive and appear in ACV and ACI. When
freq.
is enabled, the
is slower than indicated. When
s, which are disabled if an
SMX2040 is detected.
*
* A simple Windows .EXE example for demonstrating the SMX2040,44
* DMMs using "C"
* Sets Function to VDC, Range to 33V, rate to 10rps.
* Display five measurements using a Message box.
*
******************************************************************
ake sure SM204032.lib is included in the libraries. For Microsoft
* Version 4.0 C++ and above, place under 'Source Files' in the
* Workspace, along side with Exmp2040.c
* PROJECT SETTINGS:
*
* /nologo /ML /W3 /GX /O2 /D "WIN32" /D "NDEBUG
* /FR"Release/" /Fp"Release/Exmp2
*
opy both SM204
*******************************************************************/
efine WINAPI __stdcall
lude <windows.h>
lude <string.h>
f _Windows
INDOWS
if
lude "sm204032.h"
lude "UserDMM.h"
ain(void){
int I, nDmm = 0;
char
Read[16];
strMsg[256];
i = DMMInit(nDmm
if(i<0)
MessageBox(0,"Initi
DMMSetFunction(nDm
DMMSetRange(nDmm
DMMSetRate(nDmm,RAT
strcpy(strMsg,"");
for(i=1; i<= 5; i++){
R
strcat(strMsg," ");
}
MessageBox(0,strMsg, "SM204032.DLL Read Resistance & V
return
0L;
}
Visual Basic Fr
t
l
lication
Visual Basic front panel application,
SM2044.EXE,
is an interactiv
ing loading, which takes a few seconds, it initializes and self calibrates
t
ayed.
push buttons l
itch the DMM to the selected ran
d function. Autorange mo
box ecalibra es
k box. The
S-Cal
r
t
MM, leaving the DMM in the sa
rnal calibration only. It is diff en
the external calibration, which uses external stan
r any
nd gain drifts du
40CAL.DAT
file.
S-Cal
is used to co
internal offset a
erature).
fr
frequency and amplitude are shown at the same time. In this mode, the reading rate
per
is enabled, the period is shown. The SMX2044 panel has additional capabilitie
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