Specifications

Signametrics 84
bsequent thrermocouple
measurements. When measuring temperature using thermocouples it is necessary
to establish a reference or cold junction temperaturem. This is the temperature at
ooper easuring the cold junction sensor
is func ReadCJTemp() function reads the sensor output
(0 to + d converts it to cold junction temperature using the built
and m are
terminal block.
f the cold junction temperature is saved internally for subsequent
surements as well as return at the location pointed to by
Parame
Remarks Read the cold juncion temperature sensor for su
which the them
card’s c
ocouple wires are connected to the DMM or to the switching
wires. One way to do this is by m
using th
voltage
tion. DMM
/-3.3V), an
in equation Temp = b + (Vcjs – a)/m. The default values of a, b
designed specifically for the temperarute sensor of the SM40T
The value o
thermocouple mea
lpdTemp.
ter Type/Description
int Identifies th
double * Points to the location to hold the tem
nDmm
e DMM. DMMs are numbered starting with zero.
lpdTemp
perature.
lue
Value
Return Va The return value is one of the following constants.
Meaning
DMM_OKAY
lly terminated
ue
Example DMMReadCJT
DMMReadCrestFactor
SMX2040  SMX2042 ; SMX2044
Description CV sig
"sm2
Rem ndary function and the DMM must be in ACV measurement function, and
e set. A double-precision floating-point Crest Factor is stored in the
lpdResult. This measurement is a composite function, utilizing
Factor
Parame
Operation successfu
Negative Val
Error code.
emp(0, &temp);
;
Return A nal’s Crest Factor.
#include 04032.h"
int DMMReadCrestFactor(int nDmm, double FAR *lpdResult)
arks This is a Seco
a valid range must b
location pointed to by
several sub functions, and could take over 10 seconds to perform. See the Crest
measurement section of the manual for more detail.
ter
Type/Description
nDmm
arting with zero.
lpdResult
double FAR * Points to the location to hold the Crest Factor.
int Identifies the DMM. DMMs are numbered st
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