Signametrics Corporation SMU2055 Operator's Manual

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[Page 1] Signametrics Corporation SMU2055

Operator's Manual Model SMU2055 6½ Digit USB Digital Multimeter Signametrics Corporation April, 2010 Compatible with Rev 1.62 Hardware ...

[Page 2] Signametrics Corporation SMU2055

Signametrics 2 CAUTION In no event shall Signametrics or its Representatives be held liable for any consequential damages whatsoever (including, without limitation, ...

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3 Signametrics TABLE OF CONTENTS 1.0 INTRODUCTION ..............................................................................................................................................

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Signametrics 4 DMMCloseUSB...............................................................................................................................26 DMMDelay ................................

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5 Signametrics 5.11.1 Measurement and Source Functions....................................................................................58 5.11.2 Range Values ...................................

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1.0 Introduction Congratulations! You have purchased a USB Digital Multimeter. The SMU2055 Digital Multimeter (DMM) has sophisticated analog and digital circuitry to provide repeatable measurements, and its protected to handle any unexpected s...

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7 Signametrics SMU2055 basic features: Function SMU2055 DMM Volts DC; four ranges, 240mV to 240V  Volts AC; TRMS; four ranges, 240mV to 240V  2-Wire Ohms, six ranges 240  to 24 ...

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Signametrics 8 2.2 DC Current Measurement Input Characteristics  Number of built-in shunts Two  Currents greater than 2.4A require external shunt  Protected with 2.5A Fast blow fu...

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9 Signametrics 2.4.1 AC Voltage True RMS Measurement Range [1] Full Scale 6-½ Digits Lowest specified Voltage Resolution 240 mV 240.0000 mV 5 mV 100 V 2.4 V 2.400000 V 20 mV 1 ...

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Signametrics 10 2.5 AC Current Measurement, True RMS Input Characteristics  Crest Factor 4 at Full Scale  Number of built-in shunts Two  Currents greater than 2.4A require exter...

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11 Signametrics 2.7 Measurement Rates Control  Use DMMSetRate() using the following codes. Power line Rejection Rate (Readings/sec) Symbol Code 50Hz 60Hz 400Hz 0.5 RATE_p5 0 �...

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Signametrics 12 2.9 Other Specifications Temperature Coefficient Less than 0.1 x accuracy specification below 18C and over 28C ...

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13 Signametrics 2.10 Accessories Several accessories are available for the SM2060 series DMMs, which can be purchased directly from Signametrics Corp, or from one of its approved distributors ...

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Signametrics 14 3.0 Getting Started After unpacking the DMM, please inspect for any shipping damage that may have occurred, and report any claims to your transportation carrier. The packag...

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A copy of the calibration file resides on an EEProm on the DMM and is copied to your computer the first time you use the instrument. A backup copy of the calibration file is included on a diskette that comes with the DMM. The default locatio...

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Figure 3-2. The Rear panel has the USB BF type connector. Compatible with BM cable. 3.7 Starting the Control Panel You can verify the installation and gain familiarity with the DMM by exercising its measurement functions using the Windows base...

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17 Signametrics Note: All of the controls described below correspond to their respective software function, which can be invoked within your control software or as objects in a visual programmi...

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Signametrics 18 4.0 DMM Operation and Measurement Tutorial Most of the measurement functions are accessible from the Windows Control Panel (Figure above). All of the functions are included in ...

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19 Signametrics The Current functions are protected with a 2.5 A, 250 V fuse internal to the DMM. The 2.4mA and 24mA ranges utilize a 10 shunt, while the 240mA and 2.4A ranges use a 0.1 s...

[Page 20] Signametrics Corporation SMU2055

4-wire Ohm makes very repeatable low ohms measurements, from 10 m to 200 k. It is not recommended to use 4W when making measurements above 200 k. Figure 4-1. The I,4+ and I,4- sense leads should be closest to the body of th...

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21 Signametrics 5.0 Windows Interface The SMU2060 Windows interface package provided, contains all required componenets for the following products: SMU2055, SMU2060 and SMU2064. It is a 32bi...

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Signametrics 22 0.0 0.84 1.015461 23 0.0043 1.0256 22 0.1 1.02205 2 0.4 1.031386 1 0 1.0 0 ;Place holder on SMU2055 idc ; IDC 240nA to 2.5A ranges. 1 st entry is offset...

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23 Signametrics 5.3 Visual Basic Front Panel Application The Visual Basic front panel application, SMU2064.EXE, is an interactive control panel for the SM2060 family of DMMs. When it loads it ...

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Signametrics 24 Private Sub ReadBotton_Click() 'Read Botton Click action. Dim i As Long 'Any time this botton is pressed Dim dReading As Double 'the DMM takes...

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25 Signametrics DMMCalibrate Description Internally calibrate the DMM. #include "SMU2060.H" int DMMCalibrate(int nDmm) Remarks This function performs self calibration of the v...

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Signametrics 26 Value Meaning DMM_OKAY Operation successfully completed. Negative Value Error code Example int status = DMMCleanRelay(0, 2, 100); // Shake K2 1000 DMMClearMinMax Descr...

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27 Signametrics Negative Value Error code Example int status = DMMCloseUSB(0); DMMDelay Description Wait for a given time. #include "SMU2060.H" int DMMDelay(double ...

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Signametrics 28 Negative Value Error code Example char cBuf[64]; int length = DMMErrString( -3, cBuf, 48); DMMGetBusInfo Description Returns the PCI Bus and Slot numbers for the selected ...

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29 Signametrics DMMGetCalDate Description Return the calibration date string from the DMM. int DMMGetCalDate(int nDmm, LPSTR lpszCalDate) Remarks This function reads the calibration dat...

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Signametrics 30 DMMGetdBStr Description Get dB deviation from the reading at the time relative was activated. #include "SMU2060.H" int DMMGetdBStr(int nDmm, LPCSTR lpszDB) R...

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31 Signametrics Remarks This function returns a double floating value that is the percent deviation relative to the reading made just before the relative function was activated (DMMSetRelative...

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Signametrics 32 int DMMGetDiffMnMxStr (int nDmm, LPSTR lpszReading) Remarks This function return the difference between the current Max. and Min values, which is the peak-to-peak range of rec...

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33 Signametrics int DMMGetGrdVer(int nDmm) Remarks This function returns the DMM firmware version of the on-board controller. Parameter Type/Description nDmm int Identifies the DMM. D...

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Signametrics 34 Parameter Type/Description nDmm int Identifies the DMM. DMMs are numbered starting with zero. Return Value DMM hardware code or an error code. Value Meaning Positive v...

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35 Signametrics DMMGetManDate Description Get Manufacturing date stamp from the DMM hardware #include "SMU2060.H" int DMMGetManDate(int nDmm, int *month, int *day, int *year) ...

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Signametrics 36 Value Meaning DMM_OKAY Operation successfully completed. Negative Value Error code Example double Mx; int status = DMMGetMax(0, &Mx); DMMGetMaxStr Description Re...

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37 Signametrics Parameter Type/Description nDmm int Identifies the DMM. DMMs are numbered starting with zero. lpdMax double * Pointer where the Min value is to be saved. Return Value ...

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Signametrics 38 Parameter Type/Description nDevices * int Points to a location at which the number of devices is saved. Return Value Integer string length if successful, or an error code. ...

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39 Signametrics Negative Value Error code Example int status; double rate; status = DMMGetRate(0, & rate); DMMGetSupplyV Description Returns the one of the DMM supplies voltages. ...

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Signametrics 40 nDmm int Identifies the DMM. DMMs are numbered starting with zero. iIndex int Index to the stored reading, can be 0 to the total of number of readings taken mins 1. lpdRd...

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41 Signametrics nDmm int Identifies the DMM. DMMs are numbered starting with zero. lpfResult double * Pointer to the location which holds the version. Return Value Integer error code. ...

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Signametrics 42 int DMMIsAutoRange(int nDmm) Remarks This function returns the DMM autorange flag state. Parameter Type/Description nDmm int Identifies the DMM. DMMs are numbered starti...

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43 Signametrics Remarks This function returns the DMM Relative flag state. Parameter Type/Description nDmm int Identifies the DMM. DMMs are numbered starting with zero. Return Value In...

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Signametrics 44 Remarks Executing the DMMRead function causes the DMM to perform a single conversion and retrieve the result. The DMM, performs all scaling and conversion required, and returns ...

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45 Signametrics Example double reading; int status = DMMReadNorm(0, &reading); DMMReadNsamples Description Take a reading that is in base value. #include "SMU2060.h" ...

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Signametrics 46 Value Meaning DMM_OKAY Valid return. Negative Value Error code DMM_E_RANGE DMM over range error occurred. Example char cBuf[64]; int status = DMMReadingStr(0, cBuf); ...

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47 Signametrics Parameter Type/Description nDmm int Identifies the DMM. DMMs are numbered starting with zero. nFunc int A pre-defined constant corresponding to the desired function. Re...

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Signametrics 48 DMMSetRate Description Set the measurement rate. #include "SMU2060.h" #include "USBDMMUser.h" int DMMSetRate(int nDmm, int iRate) Remarks This funct...

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49 Signametrics DMMSetRelative Description Set the DMM relative reading mode for the present function. #include "SMU2060.H" int DMMSetRelative(int nDmm, int bRelative) Remarks ...

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Signametrics 50 AC_zero Description Disable AC measurement zero funciton. #include "SMU2060.H" #include "UseroDMM.h" int AC_zero(int nDdmm, int bACZero ) Remarks ...

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51 Signametrics Return Value The return value is one of the following constants. Value Meaning DMM_OKAY Cal record loaded successfully. Negative Value Error code Example /* Load a mo...

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Signametrics 52 Remarks This function returns the currently set gain,. This is the gain associated with the currently selected function and range. The value should be the same as that set in th...

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53 Signametrics SetFcomp Description Set the ACV Frequency compensation factor during service. #include "SMU2060.H" int SetFcomp(int nDmm, int iFcomp) Remarks This function s...

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Signametrics 54 Example SetOffset(0, 11212.0); // Assert the offset factor Linearize_AD Description Activate/Deactivate A/D linearization correction during service. #include "SMU206...

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55 Signametrics 5.8 Maintanance Commands GrdXingTest Description Perform the specified test #include "SMU2060.H" int GrdXingTgest(int nDmm, int iNumber, int iTest) Remarks ...

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Signametrics 56 Value Meaning Any value not 0 int Eror or warning code Example int i = WrCalFileToStore (0, "C:\\SM60CAL.dat"); WrCalStoreToFile Description Transfer the c...

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57 Signametrics Value Meaning Any value int Eror or warning code. Example int i = EraseCalStore(0); // Erase/Format cal store EEProm 5.9 Error Codes Operation of the DMM may be im...

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Signametrics 58 TRIG_SAMPL_ERR 109 // Wrong number of Trigger samples ERR_PARAMETER 110 // wrong parameter value ...

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59 Signametrics #define _240 1 #define _2400 2 #define _24k 3 #define _240k 4 #define _2400k 5 // Two Meg range #define _24MEG 6 // 2-Wire // Diode t...

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Signametrics 60 6 Calibration Each SMU2055 DMM uses its own SM60CAL.DAT calibration record to ensure the accuracy of its functions and ranges. The SM60CAL.DAT file is a text file that contains...

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61 Signametrics The SM60CAL.DAT file is created by performing external calibration. The general calibration algorithm consists of applying a zero value to the DMM followed by a value of 2/3 ...

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Signametrics 62 7.0 Warranty and Service The SMU2060, SMU2064 and SMU2055 are warranted against defects in manufacturing and materials for a period of one year from date of purchase. Removal o...