NI-DMM C Function Reference Help

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niDMM_ConfigureRTDType

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  • Updated2023-02-21
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ViStatus = niDMM_ConfigureRTDType(ViSession Instrument_Handle, ViInt32 RTD_Type, ViReal64 RTD_Resistance)

Purpose

Configures the RTD Type and RTD Resistance parameters for an RTD.

Parameters

Input
Name Type Description
Instrument_Handle ViSession Identifies a particular instrument session. You obtain the Instrument_Handle parameter from niDMM_init or niDMM_InitWithOptions. The default is None.
RTD_Type ViInt32 Specifies the type of RTD used to measure the temperature resistance. NI-DMM uses this value to set the RTD Type property. The default is NIDMM_VAL_TEMP_RTD_PT3851.

Enum Standards Material TCR (α) Typical R0 (Ω) Callendar-Van Dusen Coefficient Notes
NIDMM_VAL_TEMP_RTD_PT3851 IEC-751
DIN 43760
BS 1904
ASTM-E1137
EN-60751 		Platinum .003851 100 Ω
1000 Ω		 A = 3.9083 × 10–3
B = –5.775×10–7
C = –4.183×10–12		 Most common RTDs
NIDMM_VAL_TEMP_RTD_PT3750 Low-cost vendor compliant RTD* Platinum .003750 1000 Ω A = 3.81 × 10–3
B = –6.02×10–7
C = –6.0×10–12		 Low-cost RTD
NIDMM_VAL_TEMP_RTD_PT3916 JISC 1604 Platinum .003916 100 Ω A = 3.9739 × 10–3
B = –5.870×10–7
C = –4.4 ×10–12		 Used in primarily in Japan
NIDMM_VAL_TEMP_RTD_PT3920 US Industrial Standard D-100
American 		Platinum .003920 100 Ω A = 3.9787 × 10–3
B = –5.8686×10–7
C = –4.167 ×10–12		 Low-cost RTD
NIDMM_VAL_TEMP_RTD_PT3911 US Industrial Standard
American 		Platinum .003911 100 Ω A = 3.9692 × 10–3
B = –5.8495×10–7
C = –4.233 ×10–12		 Low-cost RTD
NIDMM_VAL_TEMP_RTD_PT3928 ITS-90 Platinum .003928 100 Ω A = 3.9888 × 10–3
B = –5.915×10–7
C = –3.85 ×10–12		 The definition of temperature
*No standard. Check the TCR.
RTD_Resistance ViReal64 Specifies the RTD resistance in ohms at 0 °C. NI-DMM uses this value to set the RTD Resistance property. The default is 100 (Ω).

Return Value

Name Type Description
Status ViStatus Reports the Status of this operation. To obtain a text description of the status code, call niDMM_GetErrorMessage. To obtain additional information concerning the error condition, use niDMM_GetError.

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