Operator`s manual
Table Of Contents
- 1.0 Introduction
- 2.0 Specifications
- 2.1 DC Voltage Measurement
- 2.2 DC Current Measurement
- 2.3 Resistance Measurements
- 2.4 AC Voltage Measurements
- 2.5 AC Current Measurement, True RMS
- 2.6 Leakage Measurement (SMU2064)
- 2.7 RTD Temperature Measurement
- 2.8 Thermocouple Temperature Measurement
- 2.9 Additional Component Measurement Capability
- 2.10 Time Measurements
- 2.11 Trigger Functions
- 2.12 Measurement Times
- 2.12.1 Measurement Apertures and Read Interval
- 2.12.2 Range and Function Transition Times
- Range switching within Volts DC, using DMMSetRange()
- Range switching in Resistance (2-W or 4-W), using DMMSetRange()
- Switching between VDC and Resistance, using DMMSetFuncRange()
- Switching between Ohms and IDC, using DMMSetFuncRange()
- Switching between VDC and Capacitance, using DMMSetFuncRange()
- Switching between Ohms and Capacitance, using DMMSetFuncRange()
- Switching ranges within DC Current using DMMSetRange()
- Switching Capacitance ranges using DMMSetRange()
- 2.13 Source Functions (2064)
- 2.14 Accuracy Notes
- 2.15 Other Specifications
- 3.0 Getting Started
- 4.0 DMM Operation and Measurements Tutorial
- 4.1 Voltage Measurement
- 4.2 Current Measurements
- 4.3 Resistance Measurements
- 4.3.1 2-Wire Ohm Measurements
- 4.3.2 4-Wire Ohm Measurements
- 4.3.3 Using Offset Ohms function (SMU2064)
- 4.3.4 6-wire Guarded Resistance Measurement (SMU2064)
- 4.3.5 Extended Resistance Measurements (SMU2064)
- 4.3.6 Effects of Thermo-Voltaic Offset
- 4.3.7 Guarding High Value Resistance Measurements (SMU2064)
- 4.4 Leakage Measurements (SMU2064)
- 4.5 Anatomy of measurement timing
- 4.6 RTD Temperature Measurement (SMU2064)
- 4.7 Internal Temperature (SMU2064)
- 4.8 Diode Characterization
- 4.9 Capacitance Measurement, Charge Balance method
- 4.10 In-Circuit Capacitance Measurement (SMU2064)
- 4.11 Measuring the resistance in a series RC network (2064)
- 4.12 Inductance Measurement (SMU2064)
- 4.13 Characteristic Impedance Measurement (SMU2064)
- 4.14 Trigger Operation
- 4.15 Time and Frequency Measurements
- 4.16 Source Functions (2064)
- 4.17 Interfacing to an external device
- 4.18 Measuring Thermocouples’ Temperature
- 4.19 Auxiliary VDC inputs (2064)
- 5.0 Windows Interface
- 5.1 Distribution Files
- 5.2 Using the SMU2060 Driver With C++ or Similar Software
- 5.3 Visual Basic DMM Panel Application
- 5.4 Windows DLL Default Modes and Parameters
- 5.5 Using the SMU2060 DLL with LabWindows/CVI
- 5.6 Windows Command Language
- DMMArmAnalogTrigger
- DMMArmTrigger
- DMMBurstBuffRead
- DMMBurstRead
- DMMCalibrate
- DMMCleanRelay
- DMMClearMinMax
- DMMCloseUSB
- DMMDelayedTrigger
- DMMDisableTrimDAC
- DMMDisarmTrigger
- DMMDutyCycleStr
- DMMErrString
- DMMFrequencyStr
- DMMGetACCapsR
- DMMGetAperture
- DMMGetAverageVAC
- DMMGetBufferSize
- DMMGetBusInfo
- DMMGetCalDate
- DMMGetdB
- DMMGetdBStr
- DMMGetCJTemp
- DMMGetCounterRange
- DMMGetDeviation
- DMMGetDeviatStr
- DMMGetDevLocation
- DMMGetDiffMnMxStr
- DMMGetFuncRange
- DMMGetFunction
- DMMGetGrdVer
- DMMGetHwVer
- DMMGetHwOption
- DMMGetID
- DMMGetLowFreqVRMS
- DMMGetManDate
- DMMGetMax
- DMMGetMaxStr
- DMMGetMin
- DMMGetMinStr
- DMMGetNumDevices
- DMMGetRange
- DMMGetReadInterval
- DMMGetSourceFreq
- DMMGetStoredReading
- DMMGetSourceMode
- DMMGetTCType
- DMMGetTrigger
- DMMGetTriggerInfo
- DMMGetType
- DMMGetVer
- DMMInit
- DMMIsAutoRange
- DMMIsInitialized
- DMMIsRelative
- DMMLongTrigger
- DMMLongTrigRead
- DMMOpenCalACCaps
- DMMOpenTerminalCal
- DMMOpenUSB
- DMMOutputSync
- DMMPeriodStr
- DMMQuickInit
- DMMRead
- DMMReadBuffer
- DMMReadBufferStr
- DMMReadCJTemp
- DMMReadCrestFactor
- DMMReadDutyCycle
- DMMReadSR
- DMMReadFrequency
- DMMReadHiLoSense
- DMMReadHiSense
- DMMReadInductorQ
- DMMReadInductorR
- DMMReadLoSense
- DMMReadMeasurement
- DMMReadMedian
- DMMReadNorm
- DMMReadNsamples
- DMMReadPeakToPeak
- DMMReadPeriod
- DMMReadStr
- DMMReadTestV
- DMMReadTotalizer
- DMMReadWidth
- DMMReady
- DMMSetACCapsDelay
- DMMSetACCapsLevel
- DMMSetACVSource
- DMMSetAperture
- DMMSetAutoRange
- DMMSetBuffTrigRead
- DMMSetCapsAveSamp
- DMMSetCJTemp
- DMMSetCompThreshold
- DMMSetCounterRng
- DMMSetDCISource
- DMMSetDCVSource
- DMMSetFastRMS
- DMMSetFuncRange
- DMMSetFunction
- DMMSetInductFreq
- DMMSetOffsetOhms
- DMMSetPLC
- DMMSetPulseGen
- DMMSetRange
- DMMSetReadInterval
- DMMSetReference
- DMMSetRelative
- DMMSetRTD
- DMMSetSensorParams
- DMMSetSourceMode
- DMMSetSourceRes
- DMMSetSync
- DMMSetTCType
- DMMSetTempUnits
- DMMSetTrigPolarity
- DMMSetTrigRead
- DMMSetTrimDAC
- DMMStartTotalizer
- DMMStopTotalizer
- DMMTerminate
- DMMTrigger
- DMMTriggerBurst
- DMMUnlockCounter
- DMMWaitForTrigger
- DMMWidthStr
- 5.7 Calibration and Service Commands
- 5.8 Service Commands
- 5.9 Error Codes
- 5.10 Warning Codes
- 5.11 Parameter List
- 6.0 Maintenance
- 7.0 Warranty and Service
- 8.0 Accessories

77 Signametrics
Negative Value
Error code
Positive Value < 100
The length of the returned string
Postive Value ≥ 100
Warning code
Example char cBuf[64];
int length = DMMErrString( -3, cBuf, 48);
DMMFrequencyStr
SMU2060 SMU2064
Description Return the next DMM frequency reading, formatted for printing.
#include "SMU2060.h"
int DMMFrequencyStr(int nDmm, LPSTR lpszReading)
Remarks This function makes frequency measurement and returns the result as a string formatted
for printing. The print format is fixed to six digits plus units, e.g., 05.001 Hz. If the
DMM is in Autorange, be certain to take an amplitude reading before using this
command. It may take several calls to DMMFrequencyStr() to get the measured
frequency, because the DMM frequency counter uses a frequency ranging scheme which
gets activated only when a frequency or period reading function is received. If the
previously measured frequency was 2 Hz and the frequency being measured is 300 kHz
(or vise versa), it might take as many as six calls to DMMFrequencyStr() or any of the
other frequency measurement functions, to read the correct frequency. To improve this
use the DMMSetCounterRng() is function requires the DMM to be in either VAC or
IAC function and at the appropriate range.
Parameter
Type/Description
nDmm
int Identifies the DMM. DMMs are numbered starting with zero.
lpszReading
LPSTR Points to a buffer (at least 64 characters long) to hold the
converted result.
Return Value The return value is one of the following constants.
Value
Meaning
Negative Value
Error code
Positive Value < 100
The length of the returned string
Postive Value ≥ 100
Warning code
Example char cBuf[64];
int status;
status = DMMFrequencyStr(0, cBuf);
DMMGetACCapsR
SMU2060 SMU2064