Signametrics SM2060, SMX2060, SMX2064, SM2064 Operator's Manual

Operator's Manual

Model SM2060 7½ Digit Digital PCI Multimeter Model SMX2060 7½ Digit Digital PXI Multimeter Model SM2064 7½ Digit High Work Load PCI Digital Multimeter Model SMX2064 7½ Digit High Work Load PXI Digital Multimeter

Signametrics Corporation

February 2005 Rev 1.1

CAUTION

In no event shall Signametrics or its Representatives are liable for any consequential damages whatsoever (including, without limitation, damages for loss of business profits, business interruption, loss of business information, or other loss) arising out of the use of or inability to use Signametrics products, even if Signametrics has been advised of the possibility of such damages. Because some states do not allow the exclusion or limitation of liability for consequential damages, the above limitations may not apply to you.

reproduced in any form without the permission of Signametrics Corporation.

Signametrics 2

TABLE OF CONTENTS

1.0 INTRODUCTION.................................................................................................................................................8

1.1 S

AFETY CONSIDERATIONS

1.2 M

INIMUM REQUIREMENTS

1.3 F

EATURE SET

2.0 SPECIFICATIONS.............................................................................................................................................10

2.1 DC V

2.2 DC C

2.3 R

2.4 AC V

2.5 AC C

2.6 L

2.7 RTD T

2.8 T

2.9 A

2.10 T

2.11 T

2.12 M

2.13 S

2.14 A

2.15 O

OLTAGE MEASUREMENT

URRENT MEASUREMENT

ESISTANCE MEASUREMENTS

2.3.1 2-wire.....................................................................................................................................11

2.3.2 4-wire.....................................................................................................................................11

2.3.3 6-wire Guarded Resistance Measurement (SM2064)............................................................11

2.3.4 Extended Resistance Measurements (SM2064) .....................................................................12

OLTAGE MEASUREMENTS

2.4.1 AC Voltage True RMS Measurement.....................................................................................12

2.4.2 AC Peak-to-Peak Measurement (SM2064)............................................................................14

2.4.3 AC Crest Factor Measurement (SM2064) .............................................................................15

2.4.4 AC Median Value Measurement (SM2064)...........................................................................15

URRENT MEASUREMENT

EAKAGE MEASUREMENT

HERMOCOUPLE TEMPERATURE MEASUREMENT

DDITIONAL COMPONENT MEASUREMENT CAPABILITY

2.9.1 Diode Characterization .........................................................................................................17

2.9.2 Capacitance, Ramp Method (SM2064)..................................................................................17

2.9.3 Capacitance, In-Circuit Method (SM2064)..........................................................................19

2.9.4 Inductance Measurement (SM2064)......................................................................................19

IME MEASUREMENTS

2.10.1 Threshold DAC ....................................................................................................................19

2.10.2 Frequency and Period Measurement...................................................................................20

2.10.3 Duty Cycle Measurement.....................................................................................................20

2.10.4 Pulse Width..........................................................................................................................20

2.10.5 Totalizer...............................................................................................................................21

RIGGER FUNCTIONS

2.11.1 External Hardware Trigger (at DIN-7 connector) ..............................................................21

2.11.2 Analog Threshold Trigger....................................................................................................21

2.11.3 Delayed Hardware Trigger..................................................................................................21

EASUREMENT APERTURE AND READ INTERVAL

OURCE FUNCTIONS

2.13.1 DC Voltage Source ..............................................................................................................24

2.13.2 AC Voltage Source...............................................................................................................24

2.13.3 DC Current Source..............................................................................................................24

CCURACY NOTES

THER SPECIFICATIONS

.............................................................................................................................................9

EMPERATURE MEASUREMENT

..........................................................................................................................8

.........................................................................................................................9

.................................................................................................................10

..................................................................................................................11

...............................................................................................................12

, T

RUE

RMS .............................................................................................15

(SM2064) ......................................................................................................16

(SM2064) .....................................................................................16

(SM2064) ...................................................................17

..........................................................................17

...........................................................................................................................19

.............................................................................................................................21

..................................................................................21

(SMX2064)...........................................................................................................23

.................................................................................................................................24

.........................................................................................................................25

3.0 GETTING STARTED.........................................................................................................................................27

3.1 S

ETTING THE

3.2 I

NSTALLING THE

3.3 I

NSTALLING THE SOFTWARE

3.4 DMM I

3.5 S

TARTING THE CONTROL PANEL

3.6 U

SING THE CONTROL PANEL

4.0 DMM OPERATION AND MEASUREMENT TUTORIAL...........................................................................32

DMM .................................................................................................................................27

DMM M

NPUT CONNECTORS

ODULE

.............................................................................................................27

....................................................................................................................27

......................................................................................................................28

..............................................................................................................29

....................................................................................................................30

3 Signametrics

4.1 V

OLTAGE MEASUREMENT

4.1.1 DC Voltage Measurements ....................................................................................................32

4.1.2 True RMS AC Voltage Measurements ...................................................................................32

4.1.3 AC Peak-to-Peak and Crest Factor (SM2064)......................................................................33

4.1.4 AC Median Value Measurement (SM2064)...........................................................................33

4.2 C

URRENT MEASUREMENTS

4.2.1 Extended DC Current Measurements (SM2064) ...................................................................34

4.2.2 Improving DC Current Measurements ..................................................................................34

4.2.3 DC Current Measurements at a specific voltage...................................................................34

4.3 R

ESISTANCE MEASUREMENTS

4.3.1 2-Wire Ohm Measurements ...................................................................................................35

4.3.2 4-Wire Ohm Measurements ...................................................................................................35

4.3.3 Using Offset Ohms function (SM2064)..................................................................................36

4.3.4 6-wire Guarded Resistance Measurement (SM2064)............................................................36

4.3.5 Extended Resistance Measurements (SM2064) .....................................................................37

4.3.6 Effects of Thermo-Voltaic Offset ............................................................................................38

4.3.7 Guarding High Value Resistance Measurements (SM2064) .................................................39

4.4 L

EAKAGE MEASUREMENTS

4.5 M

EASUREMENT TIMING

4.5.1 Aperture.................................................................................................................................40

4.5.2 Read Interval..........................................................................................................................40

4.6 RTD T

4.7 I

4.8 D

4.9 C

4.10 IN-C

4.11 I

4.12 C

4.13 T

4.14 F

4.15 S

4.16 I

4.17 M

4.18 U

EMPERATURE MEASUREMENT

NTERNAL TEMPERATURE

IODE CHARACTERIZATION

APACITANCE MEASUREMENT

IRCUIT CAPACITANCE MEASUREMENT

NDUCTANCE MEASUREMENT

HARACTERISTIC IMPEDANCE MEASUREMENT

RIGGER OPERATION

4.13.1 External Hardware Trigger.................................................................................................44

4.13.2 Analog Threshold Trigger....................................................................................................45

4.13.3 Software Generated Triggered Operations..........................................................................45

REQUENCY AND TIME MEASUREMENTS

4.14.1 Threshold DAC ....................................................................................................................47

4.14.2 Frequency and Period Measurements .................................................................................48

4.14.3 Duty Cycle Measurement.....................................................................................................48

4.14.4 Pulse Width..........................................................................................................................48

4.14.5 Totalizer Event Counter.......................................................................................................48

OURCING FUNCTIONS

4.15.1 DC Voltage Source ..............................................................................................................49

4.15.2 AC Voltage Source...............................................................................................................50

4.15.3 DC Current Source..............................................................................................................51

4.15.4 Source Current - Measure Voltage......................................................................................51

NTERFACING TO THE

4.16.1 Triggering the SM2060 DMM’s...........................................................................................51

4.16.2 Multiplexing with the SM2060 DMM’s................................................................................52

4.16.3 Interface Commands and Timing .........................................................................................52

EASURING TEMPERATURE WITH THERMOCOUPLES

SING THE

PXI

BUS TRIGGER FACILITIES

4.18.1 Selecting PXI Trigger Outputs.............................................................................................53

4.18.2 Selecting PXI Trigger Inputs ...............................................................................................54

........................................................................................................................32

......................................................................................................................33

..................................................................................................................35

(SM2064)..................................................................................................... 39

...........................................................................................................................40

(SM2064) .......................................................................................................42

.....................................................................................................................42

(SM2064) ...............................................................................................43

(SM2064) ............................................................................................... 44

.............................................................................................................................44

(SM2064)..........................................................................................................49

SM4040

SERIES RELAY SCANNERS

(SM2064) .....................................................................................42

(SM2064) ..........................................................................43

(SM2064)..................................................................... 44

...............................................................................................47

......................................................................51

.............................................................................53

(SMX2064)..........................................................................53

5.0 WINDOWS INTERFACE..................................................................................................................................55

5.1 D

ISTRIBUTION FILES

5.2 U

SING THE

5.3 V

ISUAL BASIC FRONT PANEL APPLICATION

5.4 W

INDOWS

SM2060 D

5.2.1 Multiple Card Operations under Windows............................................................................57

5.3.1 Visual Basic Simple Application............................................................................................59

DLL D

EFAULT MODES AND PARAMETERS

Signametrics 4

................................................................................................................................55

RIVER WITH

C++

OR SIMILAR SOFTWARE

.............................................................................................58

............................................................57

.............................................................................60

5.5 U

SING THE

5.6 W

INDOWS COMMAND LANGUAGE

SM2060 DLL

DMMArmAnalogTrigger ................................................................................................................60

DMMArmTrigger............................................................................................................................62

DMMBurstBuffRead .......................................................................................................................63

DMMBurstRead..............................................................................................................................64

DMMCalibrate................................................................................................................................65

DMMCleanRelay ............................................................................................................................66

DMMClearBuffer............................................................................................................................67

DMMClearMinMax ........................................................................................................................67

DMMClosePCI ...............................................................................................................................68

DMMDelay .....................................................................................................................................68

DMMDelayedTrigger .....................................................................................................................69

DMMDisableTrimDAC...................................................................................................................70

DMMDisArmTrigger ......................................................................................................................70

DMMDutyCycleStr .........................................................................................................................71

DMMErrString................................................................................................................................71

DMMFrequencyStr.........................................................................................................................72

DMMGetACCapsR .........................................................................................................................73

DMMGetAperture...........................................................................................................................73

DMMGetBufferSize.........................................................................................................................74

DMMGetBusInfo.............................................................................................................................74

DMMGetCalDate............................................................................................................................75

DMMGetdB.....................................................................................................................................76

DMMGetdBStr................................................................................................................................76

DMMGetCJTemp............................................................................................................................77

DMMGetDeviation .........................................................................................................................77

DMMGetDeviatStr..........................................................................................................................78

DMMGetFuncRange.......................................................................................................................78

DMMGetFunction...........................................................................................................................79

DMMGetGrdVer.............................................................................................................................79

DMMGetHwVer..............................................................................................................................80

DMMGetID.....................................................................................................................................80

DMMGetManDate..........................................................................................................................81

DMMGetMax..................................................................................................................................82

DMMGetMaxStr .............................................................................................................................82

DMMGetMin...................................................................................................................................83

DMMGetMinStr.............................................................................................................................. 83

DMMGetRange...............................................................................................................................84

DMMGetReadInterval ....................................................................................................................85

DMMGetSourceFreq ......................................................................................................................85

DMMGetTCType.............................................................................................................................86

DMMGetTriggerInfo.......................................................................................................................86

DMMGetType .................................................................................................................................87

DMMGetVer ...................................................................................................................................87

DMMInit .........................................................................................................................................88

DMMIsAutoRange ..........................................................................................................................88

DMMIsInitialized............................................................................................................................89

DMMIsRelative...............................................................................................................................89

DMMOpenPCI................................................................................................................................90

DMMOpenCalACCaps...................................................................................................................90

DMMOpenTerminalCal..................................................................................................................91

DMMPeriodStr ...............................................................................................................................92

DMMPolledRead ............................................................................................................................92

DMMPolledReadCmd.....................................................................................................................93

DMMPolledReadStr........................................................................................................................94

DMMQuickInit................................................................................................................................94

DMMRead.......................................................................................................................................95

DMMReadBuffer.............................................................................................................................96

DMMReadBufferStr........................................................................................................................97

WITH LABWINDOWS

...........................................................................................................60

/CVI®............................................................................60

5 Signametrics

DMMReadCJTemp .........................................................................................................................97

DMMReadCrestFactor ...................................................................................................................98

DMMReadDutyCycle......................................................................................................................99

DMMReadFrequency......................................................................................................................99

DMMReadInductorQ....................................................................................................................100

DMMReadMeasurement...............................................................................................................101

DMMReadMedian......................................................................................................................... 101

DMMReadNorm............................................................................................................................102

DMMReadPeakToPeak.................................................................................................................102

DMMReadPeriod..........................................................................................................................103

DMMReadStr................................................................................................................................104

DMMReadTotalizer ......................................................................................................................105

DMMReadWidth...........................................................................................................................105

DMMReady...................................................................................................................................106

DMMSetACCapsDelay .................................................................................................................106

DMMSetACCapsLevel..................................................................................................................107

DMMSetACVSource .....................................................................................................................107

DMMSetAperture..........................................................................................................................108

DMMSetAutoRange ......................................................................................................................109

DMMSetBuffTrigRead ..................................................................................................................109

DMMSetCapsAveSamp.................................................................................................................110

DMMSetCJTemp...........................................................................................................................111

DMMSetCompThreshold ..............................................................................................................112

DMMSetCounterRng..................................................................................................................... 112

DMMSetDCISource......................................................................................................................113

DMMSetDCVSource.....................................................................................................................114

DMMSetFastRMS.........................................................................................................................115

DMMSetFuncRange......................................................................................................................115

DMMSetFunction..........................................................................................................................116

DMMSetInductFreq......................................................................................................................116

DMMSetOffsetOhms.....................................................................................................................117

DMMSetPXITrigger......................................................................................................................117

DMMSetRange..............................................................................................................................118

DMMSetReadInterval...................................................................................................................119

DMMSetReference........................................................................................................................119

DMMSetRelative...........................................................................................................................120

DMMSetRTD ................................................................................................................................121

DMMSetSensorParams.................................................................................................................122

DMMSetSourceMode....................................................................................................................122

DMMSetSync ................................................................................................................................123

DMMSetTCType ........................................................................................................................... 124

DMMSetTempUnits....................................................................................................................... 124

DMMSetTrigPolarity....................................................................................................................125

DMMSetTrigRead.........................................................................................................................125

DMMSetTrimDAC ........................................................................................................................126

DMMStartTotalizer.......................................................................................................................127

DMMStopTotalizer .......................................................................................................................128

DMMTerminate.............................................................................................................................128

DMMTrigger.................................................................................................................................129

DMMTriggerBurst........................................................................................................................ 130

DMMWidthStr...............................................................................................................................131

5.7 C

ALIBRATION SERVICE COMMANDS

AC_zero ........................................................................................................................................133

DMMLoadCalFile.........................................................................................................................133

GetGain.........................................................................................................................................134

GetOffset.......................................................................................................................................134

SetFcomp ......................................................................................................................................135

SetOffset........................................................................................................................................136

Linearize_AD................................................................................................................................136

Read_ADcounts ............................................................................................................................137

......................................................................................................133

Signametrics 6

5.8 M

AINTANANCE COMMANDS

GrdXingTest ..................................................................................................................................138

5.7 E

RROR CODES

5.8 W

ARNING CODES

..................................................................................................................138

........................................................................................................................................138

...................................................................................................................................139

6.0 MAINTENANCE ..............................................................................................................................................139

6.1 P

ERFORMANCE TESTS

6.2 DC V

6.3 R

6.4 R

6.5 AC V

6.6 DC C

6.7 AC C N

OTE

6.8 C

6.8 I

6.9 F

6.10 C

OLTAGE TEST

ESISTANCE TEST

OLTAGE TEST

URRENT TEST

: S

OME RANGES APPLY TO

APACITANCE TEST

NDUCTANCE TEST

REQUENCY COUNTER TEST

ALIBRATION

............................................................................................................................141

................................................................................................................................141

, 2-

WIRE

.....................................................................................................................142

, 4-

WIRE

.....................................................................................................................143

................................................................................................................................144

................................................................................................................................145

................................................................................................................................146

2064

ONLY

. P

(SM2064

LEASE REFER TO CHAPTER

ONLY

) ....................................................................................................147

ONLY

) ...................................................................................................... 148

( SM2064

ONLY

) ......................................................................................149

2.0 (S

PECIFICATION

). .................146

.......................................................................................................................................150

7.0 WARRANTY AND SERVICE.........................................................................................................................152

8.0 ACCESSORIES.................................................................................................................................................152

7 Signametrics

1.0 Introduction

Congratulations! You have purchased a Personal Computer (PC) Plug-in instrument with analog and systems performance that rivals the best, all-in-one box, instruments. The SM2060 and SMX2064 Digital Multimeters (DMM’s) are easy to setup and use, have sophisticated analog and digital circuitry to provide very repeatable measurements, and are protected to handle any unexpected situations your measurement environment may encounter. To get years of reliable service from these DMM’s, please take a few moments and review this manual before installing and using this precision instrument.

This manual describes the SM2060 and SM2064 DMM’s. The SMX2060 is identical to the SM2060 and the SMX2064 is identical to the SM2064. The only difference is the bus type. The SM206X is a PCI module, while the SMX206X is a PXI/cPCI module.

Note: In this manual, all references made to the "SM2060" are applicable to the SMX2060, and references to the “SM2064” are applicable to the SMX2064. References to “DMM” apply to the SM2060, SMX2060, SM2064 and SMX2064. Features unique to the SM2064 will be identified as such.

1.1 Safety Considerations

Safety Considerations

The SM2060 series of DMM’s is capable of measuring up to 300 VDC or 250 VAC across the Volt HI and LO terminals, and can also measure common mode signals that "float" the DMM above EARTH ground by up to 300 VDC or 250 VAC. When making common mode measurements, the majority of the

circuits inside the DMM are at the common mode voltage. These voltages can be lethal and can KILL!

During and after installing your DMM, check to see that there are no wires or ribbon cables from your PC trapped inside the DMM.

The DMM comes installed with four shields (bottom, top and two edge strips) that must not be removed for performance as well as safety reasons. Removal of these shields and/or improper assembly of the

shields can result in lethal voltages occurring within your PC. Be sure to check your installation before closing the cover on your personal computer.

Warning

Check to see that no loose wires or ribbon cables infringe upon any of the internal circuits of the DMM, as this may apply measurement voltages to your computer, causing electrocution and/or damage to your computer!

To avoid shock hazard, install the DMM only into a computer that has its power connector connected to a power receptacle with an earth safety ground.

When making any measurements above 50 VDC or 40 VAC, only use Safety Test Leads. Examples

of these are the Signametrics Basic Test Leads and Deluxe Test Leads, offered as an accessory with the Signametrics DMM’s.

Signametrics 8

1.2 Minimum Requirements

The SM2060 series of system DMM’s are precision plug-in modules that are compatible with IBM type personal computers (PCs), PXI and cPCI chassis. It requires as a minimum a Pentiums computer. They require a half-length expansion slot on the PCI bus or 3U PXI slot. A mouse must be installed when controlling the DMM from the Windows Control Panel. The SM2060 comes with a Windows' DLL, for operation with Windows' Version

95/98/Me/2000/XP and NT4.0.

1.3 Feature Set

The base unit, the SM2060, has traditional 7-1/2 digit features and it can be used as a general purpose DMM, where accuracy and speed are important. The High Workload Multi Function SM2064 adds timing, capacitance, inductance, sourcing and a lot more speed. With its specialized measurements, it can replace some costly instruments, shrinking the size and cost of a test system.

SM2060 and SM2064 7½ Digit DMM’s feature table:

Function SM/SMX2060

DMM

DCV five ranges 240mV to 330V ACV five ranges 240mV to 330V 2-Wire Ohms, six ranges 240 Ω to 24 MΩ √ √ 4-Wire Ohms, six ranges 240 Ω to 24 MΩ √ √ DC current, four ranges 2.4 mA to 2.4 A AC current, four ranges 2.4 mA to 2.4 A Diode V/I characteristics at 100 ηA to 1mA √ √ (plus 10mA) Auto range, Relative Min/Max, dB and percent deviation functions On board measurement buffer External and threshold trigger Thermocouples type;

High Dynamic range; +24,000,000 counts

Frequency / Period measurement Measurement rate: 0.2 to 1,400/sec Measurement rate: to 20,000/sec Capacitance, ramp type, eight ranges, 1 nF to 10 mF Capacitance, In-Circuit method five ranges, 24nF to 2.4mF Inductance, six ranges 33 µH to 3.3 H Internal DMM temperature sensor Offset Ohms Temperature types pt385, 3911, 3916, 3926, Copper, variable Ro Pulse width, pos./neg., & duty cycle Totalizer/event counter Variable threshold DAC; all timing measure. Peak to Peak, Crest factor, Median Six wire Ohms (with force/sense) DCV source to ±10.0 V ACV source 0 to 20 V pk-pk, 2 Hz to 75 KHz DC current source, 1 nA to 12.5 mA Leakage measurement to ±10.0V three ranges 240nA, 2.4uA, 25uA

Expanded ranges

2-Wire Ohms two additional ranges 24 Ω and 240 MΩ 4-Wire Ohms additional range 24 Ω Resistance with V&I limits (to 10GΩ) DC Current four additional ranges 240nA, 2.4µA, 24µA, 240µA

B, E, J, K, N, R, S, T

√ √ √ √

√ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √

SM/SMX2064

High Workload

DMM

√ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √

9 Signametrics

2.0 Specifications

The following specifications are based on both, verification of large number of units as well as mathematical evaluation. They should be considered under the environment specified.

It is important to note that a DMM specified range is expressed as a numeric value indicating the highest absolute voltage that can be measured. The lowest value that can be detected is expressed by the corresponding resolution for the range.

2.1 DC Voltage Measurement

Input Characteristics

• Input Resistance 240 mV, 2.4 V Ranges: >10 GΩ, with typical leakage of 50pA

• Input Resistance 24 V, 240 V, 330V Ranges: 10.00 MΩ

Accuracy ± (% of reading + Volts) [1]

Range Full Scale

7-½ Digits

240 mV 240.00000 mV

2.4 V 2.4000000 V 24 V 24.000000 V

240 V 240.00000 V 330 V

330.00000 V

Resolution 24 hours

23°C ± 1°C

10 ηV 0.003 + 1 µV 0.004 + 1.5 µV 0.005 + 2 µV

100 ηV 0.002 + 3 µV 0.0025 + 5 µV 0.003 + 10 µV

1 µV 0.003 + 150 µV 0.004 + 250 µV 0.005 + 300 µV

10 µV

0.004 + 200 µV 0.005 + 300 µV

10 µV

0.005 + 250 µV 0.01+ 400 µV

90 Days 23°C ± 5°C

One Year 23°C ± 5°C

0.006 + 0.5 mV

0.015 + 0.7 mV

[1] With Aperture set to  0.5 Sec, and within one hour from Self Calibration (S-Cal).

For resolution at smaller Apertures, see the following table. Use this table for DC Volts, DC current and Resistance measurements.

Measurement Aperture

SM2060, SM2064

Maximum reading

rate

Resolution

0.5 s < Aperture 2 / second 7-1/2 digits 25 bits

10 ms < Aperture 100 / second 6-1/2 digits 22 bits 625µs < Aperture

1200 / second 5-1/2 digits 18 bits

2.5us < Aperture [2] 20,000 / second [2] 4-1/2 digits 14 bits

[2] Available only with the SM2064.

DCV Noise Rejection Normal Mode Rejection, at 50, 60, or 400 Hz ± 0.5%, is better than 95 dB for apertures of 0.160s and higher. Common Mode Rejection (with 1 kΩ lead imbalance) is better

than 120 dB for these conditions.

2.2 DC Current Measurement

Input Characteristics

• Number of shunts Five in SM2064, two in the SM2060

• Protected with 2.5A Fast blow fuse

Accuracy ± (% of reading + Amps) [1]

Range Full Scale

6-½ Digits

240 ηA [2] 240.0000 ηA

2.4 µA [2] 2.400000 µA 24 µA [2] 24.00000 µA

240 µA [2] 240.000 µA 10 ηA

2.4 mA 2.40000 mA 24 mA 24.0000 mA

240 mA 240.000 mA

2.4 A 2.40000 A

Resolution Max Burden

Voltage

0.1 pA 1 pA

10 pA

10 ηA

100 ηA

1 µA 10 µA

100 µV 100 µV 100 µV

2.5mV 25mV 250mV 55mV 520mV

24 hours 23°C ± 5°C

0.07 + 40pA 0.1 + 45pA 0.17 + 60pA

0.05 + 70pA 0.08 + 90pA 0.21 + 150pA

0.05 + 400pA 0.08 + 600pA 0.13 + 0.8nA

0.052 + 200 ηA 0.07 + 300 ηA 0.1 + 400 ηA

0.05 + 300 ηA 0.06 + 400 ηA 0.07 + 550 ηA

0.05 + 350 ηA 0.065 + 450 ηA 0.08 + 550 ηA

0.05 + 50 µA 0.055 + 60 µA 0.065 + 80 µA

0.3 + 60 µA 0.4 + 70 µA 0.45 + 90 µA

90 Days 23°C ± 5°C

[1] With Aperture set to  0.96 Sec, and within one hour from Zero (Relative control). [2] Available only with the SM2064.

One Year 23°C ± 5°C

Signametrics 10

2.3 Resistance Measurements

2.3.1 2-wire

Accuracy ± (% of reading + Ω) [1]

Range [4] Full Scale

7 ½ Digits

24 Ω[3] 24.000000 Ω 1 µΩ 240 Ω 240.00000 Ω 10 µΩ

2.4 kΩ 2.4000000 kΩ 100 µΩ 24 kΩ 24.000000 kΩ 1 mΩ 100 µA 0.0025 + 300 mΩ 0.004 + 330 mΩ 0.006 + 350 mΩ 240 kΩ 240.00000 kΩ 10 mΩ 10 µA 0.0055 + 3.2 Ω 0.006 + 4 Ω 0.007 + 5 Ω

2.4 MΩ 2.4000000 MΩ 100 mΩ 1 µA 0.018 + 40 Ω 0.03 + 50 Ω 0.04 + 70 Ω 24 MΩ 24.0000 MΩ 100 Ω 240 MΩ[3] 240.000 MΩ 1 kΩ

Resolution Source

current 10 mA 1 mA 1 mA

100 nA 10 nA

24 hours 23°C ± 1°C

0.0038 + 1.4 mΩ [2] 0.005 + 1.6 mΩ [2] 0.008 + 2 mΩ [2]

0.0037 + 4.5 mΩ [2] 0.0046 + 5 mΩ [2] 0.007 + 6 mΩ [2]

0.0023 + 28 mΩ 0.004 + 32 mΩ 0.006 + 33 mΩ

0.12 + 400 Ω 0.13 + 500 Ω 0.2 + 600 Ω

0.8 + 20 kΩ 1.0 + 30 kΩ 1.3 + 50 kΩ

90 Days 23°C ± 5°C

One Year 23°C ± 5°C

[1] With Aperture set to  0.5 Sec, and within one hour from Self Calibration (S-Cal). [2] Use of S-Cal and Relative to improve measurement floor. [3] Ranges are only available with the SM2064.

Ω

[4] Test voltages are 2.4V max with the exception of the 24

and 240 Ω ranges 240 mV.

2.3.2 4-wire

Accuracy ± (% of reading + Ω) [1]

Range [4] Full Scale

7 ½ Digits

24 Ω [3] 24.000000 Ω 1 µΩ 240 Ω 240.00000 Ω 10 µΩ

2.4 kΩ 2.4000000 kΩ 100 µΩ 24 kΩ 24.000000 kΩ 1 mΩ 100 µA 0.0025 + 300 mΩ 0.004 + 330 mΩ 0.006 + 350 mΩ 240 kΩ 240.00000 kΩ 10 mΩ 10 µA 0.0055 + 3.2 Ω 0.007 + 4 Ω 0.007 + 5 Ω

2.4 MΩ 2.4000000 MΩ 100 mΩ 1 µA 0.018 + 40 Ω 0.03 + 50 Ω 0.04 + 70 Ω 24 MΩ 24.0000 MΩ 100 Ω

Resolution Source

current 10 mA 1 mA 1 mA

100 nA

24 hours 23°C ± 1°C

0.0038 + 0.7 mΩ [2] 0.005 + 0.8 mΩ [2] 0.008 + 1 mΩ [2]

0.0037 + 3 mΩ [2] 0.0046 + 4 mΩ [2] 0.007 + 5 mΩ [2]

0.0023 + 28 mΩ 0.004 + 32 mΩ 0.006 + 33 mΩ

0.12 + 400 Ω 0.13 + 500 Ω 0.2 + 600 Ω

90 Days 23°C ± 5°C

One Year 23°C ± 5°C

[1] With Aperture set to  0.5 Sec, and within one hour from Self Calibration (S-Cal). [2] Use of Relative to facilitate indicated floor (adder part of spec). [3] 24 Ω range only available with SM2064.

Ω

[4] Test voltages are 2.4V max with the exception of the 24

and 240 Ω ranges 240 mV.

2.3.3 6-wire Guarded Resistance Measurement (SM2064)

This is an in-circuit forced guard measurement method, as implemented in ICT testers. Add this typical additional error to the above specification.

Range Guard forced current

24 Ω [3] 240 Ω

2.4 kΩ 24 kΩ 100 µA 0.03 + 1 Ω 240 kΩ 10 µA 0.35 + 10 Ω 24 MΩ 1 µA 0.85 + 1000 Ω

[1] This table should be used in conjunction with the 2-wire and 4-wire table above.

10 mA 1 mA 1 mA

Accuracy ± (% of reading + Ω)

One Year 23°C ± 5°C [1]

0.3 + 4 mΩ

0.003 + 20 mΩ

0.005 + 100 mΩ

11 Signametrics

2.3.4 Extended Resistance Measurements (SM2064)

Characteristics

• Test Voltage Adjustable between -10V and +10V in 5mV steps

Accuracy ± (% of reading + Amps) [1]

Range

400kΩ

4MΩ

40MΩ

Measurement range

1kΩ to 100MΩ

10kΩ to 1GΩ

100kΩ to 10GΩ

Resol ution

10Ω

100Ω

1kΩ

Current Limit [3] 90 Days

25µA

2.5µA 250nA

23°C ± 5°C

0.2 +

50Ω

0.3 +

350Ω

0.4 +

3kΩ

One Year 23°C ± 5°C

0.33 + 90Ω

0.43 +

0.55 + 4.5kΩ

550Ω

[1] With Aperture set to  0.5 Sec, and within one hour from Zero (Relative control). [2] Multiply “% of reading” by 1/Voltage Source for applied voltages below 1V [3] Limit is reached when the test current exceeds the Current Limit, or it is below 0.04% of this value.

2.4 AC Voltage Measurements

Input Characteristics

• Input Resistance 1 MΩ, shunted by < 300 pF, all ranges

• Max. Crest Factor 4 at Full Scale, increasing to 7 at Lowest Specified Voltage

• AC coupled Specified range: 10 Hz to 100 kHz

• Typical Settling time < 0.5 sec to within 0.1% of final value

• Typical Settling time Fast RMS < 0.05 sec to within 0.1% of final value

2.4.1 AC Voltage True RMS Measurement

Range Full Scale 7-½ Digits Lowest specified Voltage Resolution

240 mV 240.0000 mV 5 mV [1]

2.4 V 2.400000 V 10 mV 24 V 24.00000 V 100 mV

240 V 240.0000 V 1 V 330 V

[1] Between 5 mV and 10 mV, add 100 µV additional errors to the accuracy table below. [2] Signal is limited to 8x10 32 kHz, or 8x10

330.0000 V 2 V

Volt Hz Product. For example, the largest frequency input at 250 V is

Volt x Hz.

100 ηV

1 µV

10 µV 100 µV 100 µV

Signametrics 12

AC Volts Accuracy with Fast RMS disabled (default).

With Fast RMS disabled, settling time to rated accuracy is within 0.5 s. Accuracy ± (% of reading + Volts) [1]

Range Frequency 24 hours

23°C ± 1°C

240 mV

2.4 V

24 V

240 V

330 V

10 Hz - 20 Hz 20 Hz - 47 Hz 47 Hz - 10 kHz 10 kHz - 50 kHz 50 kHz - 100 kHz 10 Hz - 20 Hz 3.0 + 2 mV 3.1 + 2.2 mV 3.2 + 2.5 mV 20 Hz - 47 Hz 0.93 + 1.3 mV 0.96 + 1.5 mV 1.0 + 1.7 mV 47 Hz - 10 kHz 0.05 + 1 mV 0.055 + 1.1 mV 0.065 + 1.2 mV 10 kHz - 50 kHz 0.62 + 1.2 mV 0.65 + 1.3 mV 0.70 + 1.5 mV 50 kHz - 100 kHz 5.1 + 1.5 mV 5.2 + 1.7 mV 5.3 + 2 mV 10 Hz - 20 Hz 3.0 + 14 mV 3.1 + 16 mV 3.3 + 20 mV 20 Hz - 47 Hz 0.93 + 12 mV 0.96 + 14 mV 1.0 + 16 mV 47 Hz - 10 kHz 0.06 + 10 mV 0.065 + 11 mV 0.073 + 13 mV 10 kHz - 50 kHz 0.31 + 18 mV 0.33 + 21 mV 0.35 + 25 mV 50 kHz - 100 kHz 2.0 + 30 mV 2.2 + 35 mV 2.4 + 40 mV 10 Hz - 20 Hz 3.0 + 140 mV 3.1 + 160 mV 3.3 + 200 mV 20 Hz - 47 Hz 0.93 + 120 mV 0.96 + 130 mV 1.0 + 150 mV 47 Hz - 10 kHz 0.04 + 100 mV 0.045 + 110 mV 0.06 + 130 mV 10 kHz - 50 kHz 0.32 + 150 mV 0.4 + 170 mV 0.45 + 200 mV 50 kHz - 100 kHz 2.5 + 200 mV 2.8 + 240 mV 3.2 + 300 mV 10 Hz - 20 Hz 3.0 + 200 mV 3.1 + 160 mV 3.3 + 200 mV 20 Hz - 47 Hz 1.0 + 180 mV 1.1 + 200 mV 1.1 + 250 mV 47 Hz - 10 kHz 0.05 + 150 mV 0.07 + 200 mV 0.08 + 230 mV 10 kHz - 50 kHz 0.34 + 200 mV 0.45 + 250 mV 0.5 + 300 mV 50 kHz - 100 kHz 2.5 + 270 mV 2.8 + 350 mV 3.2 + 400 mV

3.0 + 350 µV 3.1 + 380 µV 3.2 + 430 µV

0.92 + 150 µV 0.93 + 170 µV 0.95 + 200 µV

0.13 + 100 µV 0.14 + 110 µV 0.15 + 120 µV

0.55 + 160 µV 0.6 + 200 µV 0.63 + 230 µV

5.3 + 350 µV 5.4 + 370 µV 5.6 + 400 µV

90 Days 23°C ± 5°C

One Year 23°C ± 5°C

ACV Noise Rejection Common Mode rejection, for 50 Hz or 60 Hz with 1 kΩ imbalance in either lead, is better

than 60 dB.

AC Volts Accuracy with Fast RMS enabled.

13 Signametrics

Fast RMS settles to rated accuracy within 50ms.

Accuracy ± (% of reading + Volts) [1]

Range Frequency 24 hours

23°C ± 1°C

240 mV

2.4 V

24 V

240 V

330 V

350 Hz - 800 Hz 800 Hz - 10 kHz 10 kHz - 50 kHz 50 kHz - 100 kHz 350 Hz - 800 Hz 0.93 + 1.3 mV 0.96 + 1.5 mV 1.0 + 1.7 mV 800 Hz - 10 kHz 0.068 + 1 mV 0.075 + 1.1 mV 0.08 + 1.2 mV 10 kHz - 50 kHz 0.62 + 1.2 mV 0.65 + 1.3 mV 0.70 + 1.5 mV 50 kHz - 100 kHz 5.1 + 1.5 mV 5.2 + 1.7 mV 5.3 + 2 mV 350 Hz - 800 Hz 0.93 + 12 mV 0.96 + 14 mV 1.0 + 16 mV 800 Hz - 10 kHz 0.065 + 10 mV 0.068 + 11 mV 0.073 + 13 mV 10 kHz - 50 kHz 0.31 + 18 mV 0.33 + 21 mV 0.35 + 25 mV 50 kHz - 100 kHz 2.0 + 30 mV 2.2 + 35 mV 2.4 + 40 mV 350 Hz - 800 Hz 0.93 + 120 mV 0.96 + 130 mV 1.0 + 150 mV 800 Hz - 10 kHz 0.062 + 100 mV 0.065 + 110 mV 0.08 + 130 mV 10 kHz - 50 kHz 0.32 + 150 mV 0.4 + 170 mV 0.45 + 200 mV 50 kHz - 100 kHz 2.5 + 200 mV 2.8 + 240 mV 3.2 + 300 mV 350 Hz - 800 Hz 1.0 + 180 mV 1.1 + 200 mV 1.1 + 250 mV 800 Hz - 10 kHz 0.065 + 150 mV 0.07 + 200 mV 0.08 + 230 mV 10 kHz - 50 kHz 0.34 + 200 mV 0.45 + 250 mV 0.5 + 300 mV 50 kHz - 100 kHz 2.5 + 270 mV 2.8 + 350 mV 3.2 + 400 mV

0.6 + 150 µV 0.65 + 170 µV 0.7 + 200 µV

0.13 + 100 µV 0.14 + 110 µV 0.15 + 120 µV

0.55 + 160 µV 0.6 + 200 µV 0.63 + 230 µV

5.3 + 350 µV 5.4 + 370 µV 5.6 + 400 µV

90 Days 23°C ± 5°C

One Year 23°C ± 5°C

AC Volts Accuracy with Slow RMS (default).

Settles to rated accuracy within 1X to 10X signal period, settable by user.

Range Frequency 24 hours

23°C ± 1°C

240 mV

2.4 V

24 V

240 V

330 V

0.5 Hz - 10 Hz 10 Hz - 20 Hz 20 Hz - 60 Hz 60 kHz - 200 Hz

0.5 Hz - 10 Hz 0.2 + 2 mV 0.25 + 2.2 mV 0.3 + 2.5 mV 10 Hz - 20 Hz 0.3 + 1.3 mV 0.35 + 1.5 mV 1.0 + 1.7 mV 20 Hz - 60 Hz 0.5 + 1 mV 0.55 + 1.1 mV 0.65 + 1.2 mV 60 kHz - 200 Hz 0.62 + 1.2 mV 0.65 + 1.3 mV 0.70 + 1.5 mV

0.5 Hz - 10 Hz 3.0 + 14 mV 3.1 + 16 mV 3.3 + 20 mV 10 Hz - 20 Hz 0.93 + 12 mV 0.96 + 14 mV 1.0 + 16 mV 20 Hz - 60 Hz 0.06 + 10 mV 0.065 + 11 mV 0.073 + 13 mV 60 kHz - 200 Hz 0.31 + 18 mV 0.33 + 21 mV 0.35 + 25 mV

0.5 Hz - 10 Hz 3.0 + 140 mV 3.1 + 160 mV 3.3 + 200 mV 10 Hz - 20 Hz 0.93 + 120 mV 0.96 + 130 mV 1.0 + 150 mV 20 Hz - 60 Hz 0.04 + 100 mV 0.045 + 110 mV 0.06 + 130 mV 60 kHz - 200 Hz 0.32 + 150 mV 0.4 + 170 mV 0.45 + 200 mV

0.5 Hz - 10 Hz 3.0 + 200 mV 3.1 + 160 mV 3.3 + 200 mV 10 Hz - 20 Hz 1.0 + 180 mV 1.1 + 200 mV 1.1 + 250 mV 20 Hz - 60 Hz 0.05 + 150 mV 0.07 + 200 mV 0.08 + 230 mV 60 kHz - 200 Hz 0.34 + 200 mV 0.45 + 250 mV 0.5 + 300 mV

0.25 + 100 µV 0.3 + 200 µV 0.35 + 300 µV

0.3 + 150 µV 0.35 + 170 µV 0.4 + 200 µV

0.13 + 100 µV 0.14 + 110 µV 0.15 + 120 µV

0.55 + 160 µV 0.6 + 200 µV 0.63 + 230 µV

2.4.2 AC Peak-to-Peak Measurement (SM2064)

• Measures the peak-to-peak value of a repetitive waveform.

Signametrics 14

90 Days 23°C ± 5°C

One Year 23°C ± 5°C

ACV Range

240 mV 0.1 V 1.9 V 1 mV

2.4 V 1.0 V 16 V 10 mV 0.5 ± 40 mV

24 V 10 V 190 V 100 mV 0.5 ± 700 mV

240 V 100 V 850 V 1 V 0.55 ± 6 V

[1] Signal frequency range 30 Hz to 60 kHz.

2.4.3 AC Crest Factor Measurement (SM2064)

•

Measures the crest factor (CF) of a repetitive waveform

Lowest specified

input voltage

(Vp-p)

Full Scale

reading (Vp-p)

Resolution

Typical Accuracy 23°C ± 5°C

One Year [1]

0.5 ± 3 mV

ACV Range

240 mV 0.1 V 1.9 V 0.01

2.4 V 1.0 V 16 V 0.01 2.1 ±0.1

24 V 10 V 190 V 0.01 2.0 ±0.1

240 V 100 V 700 V 0.01 2.0 ±0.1 330 V 100 V 850 V 0.01 2.0 ±0.1

[1] Crest factor measurement requires signal frequency of 30 Hz to 60 kHz.

2.4.4 AC Median Value Measurement (SM2064)

• Measures the mid-point between the positive and negative peaks of a repetitive waveform

• Used to determine the Threshold DAC setting for optimal frequency and timing measurements

ACV Range

240 mV 0.08 V

2.4 V 0.80 V 24 V 8 V

240 V 80 V 330 V 80 V

[1] Median measurements require a repetitive signal with frequency range of 30 Hz to 30 KHz.

Lowest specified

input voltage

(Vp-p)

Lowest specified input

voltage (Vp-p)

Highest specified input

voltages (Vp-p)

Full Scale

reading

±0.95 V

±9.5 V

±95.0 V ±350.0 V ±350.0 V

Resolution

1 mV

10 mV 3% ±160 mV

100 mV 3% ±1.4 V

1 V 3% ±12 V 1 V 3% ±12 V

Resolution

Typical Accuracy 23°C ± 5°C

One Year [1]

2.2 ±0.3

Typical Accuracy 23°C ± 5°C One Year [1]

2.0% ±17 mV

2.5 AC Current Measurement, True RMS

15 Signametrics

Input Characteristics

• Crest Factor 4 at Full Scale, increasing to 10 at Lowest Specified Current

• Protected with 2.5 A

Fast Blow fuse

Range Full Scale 6 1/2 Digits Lowest Specified

Current

2.4 mA 2.400000 mA 24 mA 24.00000 mA

240 mA 240.0000 mA 3 mA 55mV 100 nA

2.4 A 2.400000 A 30 mA 520mV 1 uA

60 µA

300 µA

Accuracy ± (% of reading + Amps)

Range Frequency [1] 24 hours

23°C ± 1°C

2.4 mA

24 mA

240 mA

2.4 A

10 Hz - 20 Hz 20 Hz - 47 Hz 47 Hz - 1 kHz 1 kHz - 10 kHz 10 Hz - 20 Hz 20 Hz - 47 Hz 47 Hz - 1 kHz 1 kHz - 10 kHz 10 Hz - 20 Hz 20 Hz - 47 Hz 47 Hz - 1 kHz 1 kHz - 10 kHz 10 Hz - 20 Hz 1.8 + 4 mA 2.5 + 4.5 mA 2.7 + 5 mA 20 Hz - 47 Hz 0.66 + 4 mA 0.8 + 6 mA 0.9 + 6 mA 47 Hz - 1 kHz 0.3 + 3.8mA 0.33 + 3.8 mA 0.35 + 4 mA 1 kHz - 10 kHz 0.4 + 4mA 0.45 + 4.5 mA 0.5 + 5 mA

3.8 + 4 µA 2.7 + 4 µA 2.9 + 4 µA

0.9 + 4 µA 0.9 + 4 µA 1.0 + 4 µA

0.04 + 1.5 µA 0.08 + 3 µA 0.12 + 4 µA

0.12 + 4 µA 0.14 + 4 µA 0.22 + 4 µA

1.8 + 30 µA 2.6 + 30 µA 2.8 + 30 µA

0.6 + 30 µA 0.9 + 30 µA 1.0 + 30 µA

0.07 + 10 µA 0.15 + 20 µA 0.16 + 30 µA

0.21 + 30 µA 0.3 + 40 µA 0.4 + 40 µA

1.8 + 400 µA 2.7 + 400 µA 2.8 + 400 µA

0.6 + 400 µA 0.9 + 400 µA 1.0 + 400 µA

0.1 + 100 µA 0.17 + 180 µA 0.2 + 220 µA

0.3 + 300 µA 0.35 + 350 µA 0.4 + 400 µA

[1] All AC Current ranges have typical measurement capability of at least 20 kHz.

Maximum Burden

Voltage (RMS)

25mV 1 nA

250mV 10 nA

Resolution

90 Days 23°C ± 10°C

One Year 23°C ± 10°C

2.6 Leakage Measurement (SM2064)

Characteristics

• Burden Voltage: < 100

• Test Voltage: Adjustable between -10V to +10V in 5mV steps

Accuracy ± (% of reading + Amps) [1]

Range Full Scale

6-½ Digits

240 ηA 240.0000 ηA

2.4 µA 2.400000 µA 24 µA 24.00000 µA

[1] With Aperture set to  0.5 Sec, and within one hour from Zero (Relative control).

Resolution 24 hours

23°C ± 5°C

0.1 pA 0.15 + 50pA 0.2 + 65pA 0.17 + 100pA 1 pA 0.1 + 350pA 0.15 + 500pA 0.2 + 600pA

10 pA 0.08 + 3nA 0.12 + 4nA 0.18 + 2nA

90 Days 23°C ± 5°C

One Year 23°C ± 5°C

2.7 RTD Temperature Measurement (SM2064)

Signametrics 16

• Ro: Variable from 10

Ω

to 10 kΩ

• Measurement Method: 4-Wire

• Temperature units: Selectable

C or oF

RTD Type

pt385, pt3911, pt3916, pt3926 pt385, pt3911, pt3916, pt3926 Cu (Copper)

Cu (Copper)

Ro (Ω)

100, 200 Ω 0.01°C -150 to 650°C ±0.06°C

500, 1 kΩ 0.01°C -150 to 650°C ±0.03°C

Less than 12 Ω 0.01°C -100 to 200°C ±0.18°C for temperatures ≤ 20°C, ±0.05°C

Higher than 90 Ω 0.01°C -100 to 200°C ±0.10°C for temperatures ≤ 20°C, ±0.05°C

[1] With Aperture of 0.5s and higher, using a 4-wire RTD. Measurement accuracy does not include RTD probe error.

Resolution Temperature

range

Temperature Accuracy 23°C ± 5°C [1]

One Year

otherwise

2.8 Thermocouple Temperature Measurement (SM2064)

• Cold Junction Compensation: By Sensor measurement or S/W setting.

• Cold Junction Temperature range: 0

• Cold Junction Sensor: Use SMX40T or SM40T Isothermal unit, or define sensor equation

to 50

• Isothermal Block compatibility: SM4022, SM4042, SMX4032, SM40T, SMX40T

• Temperature units: Selectable

C or oF

TC Type Resolution Maximum Temperature

[2] B E J K N R S T

0.01°C 2200°C ±0.38 °C

0.01°C 1200°C ±0.035 °C

0.01°C 2000°C ±0.06 °C

0.01°C 3000°C ±0.07 °C

0.01°C 3000°C ±0.10 °C

0.01°C 2700°C ±0.25 °C

0.01°C 3500°C ±0.35 °C

0.01°C 550°C ±0.06 °C

[1] With Aperture of 0.5s and higher. Measurement accuracy does not include Thermocouple error. [2] DMM Linearization temperature range may be greater than that of the Thermocouple device.

Temperature Accuracy 23°C ± 5°C [1]

One Year

2.9 Additional Component Measurement Capability

2.9.1 Diode Characterization

• Available DC current values 100 ηA, 1 µA, 10 µA, 100 µA and 1 mA.

• SM2064 add variable current of 10 ηA to 12.5 mA

• Typical Current Value Uncertainty 1%

• Typical Voltage Value Uncertainty 0.02%

•

Maximum diode voltage compliance 4 V

2.9.2 Capacitance, Ramp Method (SM2064)

Accuracy ± (% of reading + Farads) [1]

17 Signametrics

Range Full Scale

Reading

1,200 pF 1,199.9 pF 0.1 pF 1.5 ± 0.25 pF

12 ηF 11.999 ηF 120 ηF 119.99 ηF

1.2 µF 1.1999 µF 12 µF 11.999 µF 1 ηF

120 µF 119.99 µF 10 ηF

1.2 mF 1.1999 mF

12 mF 50.000 mF

Resolution One Year

23°C ± 5°C

1 pF 1.2 ± 5 pF 10 pF 1.0

100 pF 1.0

100 ηF

1 µF

1.0

1.2 2

[1] Within one hour of zero, using Relative control. Accuracy is specified for values higher than 5% of the selected

range with the exception of the 1,200 pF range.

This Measurement is independent of set Aperture and Read Interval. If desired, the DMMSetCapsAveSamp() function may be used to control measurement parameters. It is provided

the application, trading off accuracy for speed.

Measurement time will vary as function of the set parameters, selected range and measured capacitance. The following are measurement times associated with the default parameters, as range is selected.

Range Input Measurement Time Measurement Rate (rps) 1,200 pF 5% of Scale 1,200 pF Full Scale

12 ηF

12 ηF 120 ηF 120 ηF

1.2 µF

12 µF

12 µF 120 µF 120 µF

1.2 mF 5% of Scale

1.2 mF Full Scale

12 mF 5% of Scale 12 mF Full Scale

5% of Scale

Full Scale

5% of Scale

Full Scale

5% of Scale

Full Scale

5% of Scale

Full Scale

5% of Scale

Full Scale

19.5 ms 51.3

52.3 ms 19.1

70.0 ms 14.3 118ms 8.5

8.9 ms 112.4

127 ms 7.9

15.6 ms 64.1

175 ms 5.7

14.1 ms 70.9

480 ms 2.1

17.3 ms 57.8

50.3 ms 19.9

52.6 ms 19.0

151.5 ms 6.6

52.8 ms 18.9

170 ms 5.9

means to fine tune the measurement timing for

Signametrics 18

2.9.3 Capacitance, In-Circuit Method (SM2064)

• Adjustable Peak Voltages Stimulus 100mV to 1.3V

• Minimum Parallel Load Resistance 100Ω

Accuracy ± (% of reading + Farads) [1]

Range Full Scale

3-½ Digits

24 ηF 23.99 ηF

240 ηF 239.9 ηF

2.4 µF 2.399 µF 24 µF 23.99 µF 10 ηF

240 µF 239.9 µF 100 ηF

2.4 mF 2.399 mF

24 mF 23.99 mF

Resolution One Year

23°C ± 5°C [2]

10 pF 2.7 ± 100 pF

100 pF 2.5 ± 500 pF

1000 pF

1 µF

10 µF

2.5 ± 5 ηF

[1] Within one hour of zero, using Relative control, and Caps Open-Cal operation

[2] Accuracy is specified for values higher than 5% of the selected range with the exception of the 2.4

F range.

Capacitance Measurement time is independent of set Aperture and Read Interval. It depends on range, and capacitance

2.9.4 Inductance Measurement (SM2064)

Range Test frequency Full Scale

4 ½ Digits

24 µH

240 µH

2.4 mH 4 kHz 3.3000 mH

24 mH 1.5 kHz 33.000 mH

240 mH 1 kHz 330.00 mH

2.4 H 100 Hz 3.3000 H

75 kHz 50 kHz

33.000 µH 1 ηH 3.0% + 500 ηH

330.00 µH 10 ηH 2.0% + 3 µH

[1] Within one hour of zero, and Open Terminal Calibration. [2] Accuracy is specified for values greater than 5% of the selected range.

Resolution

100 ηH 1.5% + 25 µH

1 µH 1.5% + 200 µH

10 µH

100 µH

Accuracy 23°C ± 5°C

One Year [2]

2.5 + 3 mH 3 + 35 mH

2.10 Time Measurements

2.10.1 Threshold DAC

• The Threshold DAC is used for selecting a detection level, providing optimal frequency and timing measurements even at extreme duty cycle values.

± (% of setting + volts)

Selected VAC

range [1]

240 mV -1.0 V to +1.0 V 0.5 mV 1.900 V 0.2% + 4 mV

2.4 V -10.0 V to +10.0 V 5.0 mV 19.00 V 0.2% + 40 mV 24 V -100.0 V to 100.0 V 50 mV 190.0 V 0.2% + 0.4 V 240 V -400 V to 400 V 500 V 850.0 V 0.2% + 4 V

[1] This table should be used in conjunction with the AC volts section above.

Threshold range (DC

level)

Threshold

DAC

resolution

Highest allowed input

Vp-p

Typical one year setting

uncertainty

19 Signametrics

2.10.2 Frequency and Period Measurement

ACV Mode

•

Input Impedance 1 MΩ with < 300 pF

Frequency Range 2 Hz - 100 Hz 100 Hz-1 kHz 1 kHz-10 kHz 10 kHz-100 kHz 100 kHz-300 kHz

Resolution 1 mHz 10 mHz 100 mHz 1 Hz 1 Hz

Uncertainty is ±0.002% of reading ± adder shown Input Signal Range [1] 10% - 200%

[

1] Input RMS voltage required for a valid reading. Do not exceed 250 V RMS input. For example, 10% -200%

4 mHz 20 mHz 200 mHz 2 Hz 5 Hz

of range

of range indicates that in the 240 mVAC range, the input voltage should be 24 mV to 660 mV RMS.

ACI Mode

•

Input Impedance 10 Ω in the 3 mA and 30 mA ranges, 0.1 Ω in the 330 mA and 2.5 A ranges.

Frequency Range 2 Hz - 100 Hz 100 Hz-1 kHz 1 kHz-10 kHz 10 kHz-500 kHz

Resolution 1 mHz 10 mHz 100 mHz 1 Hz

Uncertainty 0.01% ±4 mHz 0.01% ±20 mHz 0.01% ±200 mHz 0.01% ±2 Hz Input Signal Range,

2.4 mA, 240mA Ranges [1] Input Signal Range, 24 mA, 2.4 A ranges

10% -500%

of range

50% -100%

of range

10% - 200%

of range

10% - 500%

of range

50% - 100%

of range

10% -200%

of range

10% -500%

50% - 100%

of range

10% - 200%

of range

45% -200%

of range

10% - 500%

of range

50% - 100%

of range

[1] Input current required to give a valid reading. For example, 10% -500% of range indicates that in the 3.3 mA range, the input current should be 0.33 mA to 16.5 mA.

2.10.3 Duty Cycle Measurement

Frequency Range 2 Hz to 100 Hz 100 Hz to 1 kHz 1 kHz to 10 kHz 10 kHz to 100 kHz

Resolution 0.02% 0.2% 2% 20%

Typical Uncertainty is ±0.03% of reading ± adder shown Full scale reading 100.00 % 100.00 % 100.00 % 100.00 %

0.03% 0.3% 3% 20%

2.10.4 Pulse Width

Polarity Frequency range Resolution Width range Typical

Positive or negative pulse widths

2 Hz to 100 kHz

1 µs 2 µs to 1 s 0.01 +/- 4 µs

± (% of reading + sec)

Uncertainty

Signametrics 20

2.10.5 Totalizer

(s)

• Active edge polarity: Positive or negative transition

• Maximum count: 10^9

•

Allowed rate: 1 to 30,000 events per second

Uses Threshold DAC

•

2.11 Trigger Functions

2.11.1 External Hardware Trigger (at DIN-7 connector)

Trigger Input voltage level range +3 V to +15 V activates the trigger. Trigger Pulse Width Minimum trigger input current 1 mA Internal Reading Buffer Circular; 80 or 120 readings depending on resolution. Isolation of trigger input ±50 V from analog DMM inputs, and from chassis

Minimum = 1/Aperture + 50µS

earth ground.

2.11.2 Analog Threshold Trigger

• Trigger point: Selectable positive or negative transition of set threshold.

• Buffer type: Circular

• Captures up to 120 post-trigger readings for apertures

• Captures up to 80 post-trigger readings for apertures > 625uSec.

•

Aperture range: 160ms to 625

•

Read Interval

• User selects number of post-trigger readings.

• The number of pre-trigger readings: buffer size – post-trigger count.

• The number of cycles the circular filled, and the trigger point are retrievable.

range

: 1/Aperture to 65ms

µS (to 2.5µS with SM2064)

< 625uSec.

2.11.3 Delayed Hardware Trigger

This function allows time for the signal to settle after a trigger has occurred. It allows readings to be delayed up to 65mSec with 1 It allows readings to be delayed up to 1s with 2

µs resolutions.

µSec resolution

2.12 Measurement Aperture and Read Interval

Both Aperture and The Read Interval may be set. The range of values depend on the DMM model and its mode of operation. For example, when using the internal buffer such as in External Trigger mode, the Read Interval can be set smaller than in Command/Response operation. The time involved in processing the measurement command and the post processing and transmission of the measurement results constitute an overhead, which limits the minimum Read Interval to a value that is greater than the Aperture. Setting it to zero (default) results in the fastest measurement rates at the selected Aperture. The faster SM2064 has lower overhead and therefore a shorter minimum Read Interval than the SM2060. For instance, with Aperture set to 625us and Read Interval set to zero, in command/response operation the SM2060 measurement rate is about 1,090/s while that of the SM2064 is 1,370/s. This indicates overhead of about 300µs for the SM2060 and 100µs for the SM2064.

The SM2064 has 31 A/D apertures available, ranging from 5 Seconds to 2.5µS

available measurement apertures and the corresponding minimum read intervals and measurement rates.

Power Line Rejection Command/Response

mode min. Read

21 Signametrics

. The following table contains all

H/W Trigger mode min. Read Interval

/ max meas. Rate

Interval(s) / max meas.

(Hz)

rate(Hz)

Aperture 60Hz 50Hz 400Hz

5.1200s [1]

5.0666s [1]

√ √ √ √

2.08s [1]

2.0s [1]

1.06666s [1]

√ √ √ √

960ms [1]

533.33ms [1]

√

480ms [1]

266.666ms [1]

160.0ms

133.33ms

√ √ √ √ √

80.00ms

66.6667ms

√

40.00ms

33.333ms

√

20.00ms

16.6667ms

√

5.0677s / 0.2 N/A √ √

1.067s / 1 N/A √ √

533.6ms / 2 N/A √ √

268ms / 4 N/A

134ms / 8 133.5 ms / 8 √ √

67.2ms / 15 66.713 ms / 15 √ √

33.643ms / 29.72 33.38 ms / 30 √ √

16.77ms / 59.6 16.89 ms / 59

5.121s / 0.2 N/A

2.081s / 0.5 N/A

2.001s / 0.5 N/A

0.9605s / 1 N/A

480.2ms / 2 N/A

166ms / 6 160.3 ms / 6

80.4ms / 13 80.2 ms / 13

40.4ms / 25 40.32 ms / 24.8

20.098ms / 49.76 20.33 ms / 50

10ms 10.094ms / 99 10.25 ms / 97

8.333ms 8.422ms / 119 8.503 ms / 115 5ms 5.109ms / 195 5.187 ms / 185

4.16667ms 4.265ms / 234 4.274 ms / 220

2.5ms 2.598ms / 385 2.614 ms / 350

2.0833ms 2.177ms / 458 2.216 ms / 410

1.25ms 1.344ms / 744 1.380 ms / 625

1.0417ms 1.133ms / 880 1.158 ms / 864 625µS

520.83µS

312.5µS

260.42µS

130.21µS

2.5µS

719µs / 1,390 728 µs / 1,370 617µs / 1,625 622 µs / 1,610 410µs / 2,445 414 µs / 2,445 355µs / 2,825 358 µs / 2,825 223µs / 4,475 217 µs / 4,660 47µs / 21,600 45 µs / 22,200

[1] Not available with any of the Triggered modes.

Signametrics 22

The SM2060 has are 26 A/D apertures available, ranging from 5 Seconds to 625uSec. The following table contains all available measurement apertures corresponding minimum read intervals and measurement rates.

Power Line Rejection Command/Response

mode min. Read Interval(s) / max meas. rate(Hz)

Aperture 60Hz 50Hz 400Hz

5.1200s [1]

5.0666s [1]

2.08s [1]

2.0s [1]

1.06666s [1] 960ms [1]

533.33ms [1] 480ms [1]

266.666ms [1]

160.0ms

133.33ms

80.00ms

66.6667ms

40.00ms

33.333ms

20.00ms

16.6667ms 10ms 10.36ms / 97 10.25 ms / 97

8.333ms 8.68ms / 115 8.503 ms / 115 5ms 5.36ms / 185 5.187 ms / 185

4.16667ms 4.52ms / 220 4.274 ms / 220

2.5ms 2.86ms / 350 2.614 ms / 350

2.0833ms 2.44ms / 410 2.216 ms / 410

1.25ms 1.6ms / 625 1.380 ms / 625

1.0417ms 1.39ms / 719 1.158 ms / 864 625µS

[1] Not available with any of the Triggered modes.

Precise control of the measurement timing and line frequency rejection can be accomplished by controlling the Read Interval and Aperture. Line rejection is dictated by the Aperture, and the duration of measurement is controlled with Read Interval

Read Interval can be programmed in

√ √ √ √

√

√ √ √ √ √

√

5.0677s / 0.2 N/A √ √

1.067s / 1 N/A √ √

533.6ms / 2 N/A √ √

268ms / 4 N/A

134ms / 8 133.5 ms / 8 √ √

67.2ms / 15 66.713 ms / 15 √ √

33.7ms / 30 33.38 ms / 30 √ √

16.9ms / 59 16.89 ms / 59

µs increments for values up to 65ms

5.121s / 0.2 N/A

2.081s / 0.5 N/A

2.001s / 0.5 N/A

0.9605s / 1 N/A

480.2ms / 2 N/A

166ms / 6 160.3 ms / 6

80.4ms / 13 80.2 ms / 13

40.4ms / 25 40.32 ms / 24.8

20.35ms / 50 20.33 ms / 50

917µs / 1,090 728 µs / 1,370

H/W Trigger mode min. Read Interval(s) / max meas. Rate (Hz)

, and in 20µs increments to 1 second.

Figure 2-1: Time frame of a single measurement.

.13 Source Functions (SMX2064)

23 Signametrics

•• Isolated to 300 V DC from the Chassis

Current can be paralleled with multiple SM

•

Voltage can be pu

t in series with multiple SMX2064s

X2064s

2.13.1 D

Output Voltage range -10.000 V to +10.000 V Typical Current source/sink at 5V output 5 mA 5 mA DAC resolution 18 bits 12 bits Accuracy 23°C ± 10°C One Year 0.015% ± 350 µV Typical settling time 3 S (rate set to 2/s) 1 ms Typical source resistance

[1] An Aperture 3ms or higher is required for the clos e. set to 13 ed loop mod

C Voltage Source

Parameter Closed Loop [1] Open Loop

1.0% ± 35 mV

250 Ω

2.13.2 AC Voltage Sourc

The AC Voltage source has two ranges. 900 m generating 5 mV t 9.3V while 0 o n generate 300mV to 7.2V RMS.

Parameter Specification Ranges 900mV and 8V Output Voltage, sine wave 30mV to 7.2 V RMS (0.14 to 20.0V peak-to-peak) DAC resolution 12 bits Typical Current Drive at 3.5V RMS 3 mA RMS Accuracy 18 C to 2 Typical settling time (f-out > 40 Hz) 0.5 s Typical source resistance Frequency range / resolution 10 Hz to 100 kHz / 10 mHz SFDR (spurious free dynamic range) 60dBc THD (total harmonic distortion) 59dBc Frequency stability 100 ppm ± 10 mHz

[1] 166ms er Aperture is for prop ed loop mo

8°C One Yea

or high required er clos de.

the higher range ca

V range and 8V range. The lower range is capable of

ACV spec + 0.8% ± 20 mV

250 Ω

2.13.3 DC Current Source

Range Comp

1.25 µA

12.5 A 5 A 10 A 1% + 100 A µ

125 µA

liance Voltage Resolution [1] Minimum level

4.2 V 500 pA

4.2 V

η η η

50 ηA 100 ηA 1% + 500 ηA

1 ηA 1% + 10 ηA

Accuracy 23

°C ± 10°C One Year

1.25 mA 4.2 V

12.5 mA 1.5 V

[1] Resolution without Trim DAC. The use of the Trim DAC can improve the resolution by a factor of 10, but it has

be set separately since it is not calibrated.

2.14 Accuracy Notes

Signametrics 24

500 ηA 1 µA 1% + 5 µA

5 µA 10 µA 1% + 50 µA

Important: all accuracy specifications for DCV, Resistance, DCI, ACV, and ACI apply for the time periods show

in the respective specification tables. To meet these specifications, Self Calibration must be performed once a day o as indicated in the specification table. This is a simple software operation that takes a few sec

erformed by calling Windows command DMMCal(), or selecting S-Cal in the control panel.

onds. It can be

These products are capable of continuous m second (rps). In general, to achieve 7-1/2 D 6-1/2 digit resolution requires at least 10ms Aperture. For 5-1/2 use at lea

easurement as well as data transfer rates of up to 20,000 readings per

igits of resolution, the Aperture should be set to 0.5s or a higher value.

st 625us Aperture.

2.15 Other Specifications

Temperature Coefficient over 0°C to 50°C Range

• Less than 0.1 x accuracy specification per °C At

Aperture

• 2.5

• In Triggered modes Aperture is limited to 160ms or shorter.

Read Interval

• 47

ardware fa Single PCI slot

Overload Protection (voltage inputs) 330 VDC, 250 VAC

Isolation 330 VDC, 250 VAC from Earth Ground

Maximu 8x10

1x106 Volt x Hz Common Mode input (from Voltage HI or

afety 0-1, Installation Category II.

alibration Calibrations are

Temp at n ra -10°C to 65°C

Temperature Range Storage -40°C to 85°C

(user selectable)

• 625 µs to 2s in 26 di screte values, SM2060 (approx. 0.5 t

s to 2s in 31 discrete values, SM2064 (approx. 0.

(user selectable)

• 47µs to 65ms, 1µs steps in Trigger modes, SM2064

• 730

• 916

Inter ce

m Input (Volt x Hertz)

er ure Ra ge Ope ting

s to 65ms, 1us steps in Trigger modes, SM2060

s to 1s, 1µs step o , in command/respons

s to 1s, 1µs ste el s, in command/respon

Size SM2060, SM2064: 4.5” X 8.5” (PCI form

SMX2060, SMX2064: Single 3U PXI

DMM Internal Temperature sensor accuracy ±1°C (SM2064)

ower +5 volts, 300 mA maximum

Note: Signam accessories without notice.

etrics reserves the right to make changes in materials, specifications, product functionality, or

23C ± 5°C

o 1,400 readings per second)

5 to 20,000 readings per second)

s bel w 65ms e modes, SM2064 ps b ow 65m se modes, SM2060

Volt x Hz normal mode input (across Voltage HI &

LO).

LO relative to Earth Ground).

Designed to IEC 101

performed by Signametrics in a computer at

23°C internal tem stored in a text file.

perature rise. All calibration constants are

at)

or CompactPCI slot

25 Signametrics

Accessories

v SM2060 series DMM’s, which can be purchased directly from

Se eral accessories are available for the Signametrics, or one of its approved distributors or representatives. These ar

e some of the accessories available:

• DMM probes SM-PRB ($15.70)

• DMM probe kit SM-PRK ($38.50)

• Deluxe probe kit SM-PRD ($95.00).

• Shielded SMT Tweezers Probes SM-PRSMT ($24.90).

• Multi Stacking Double Banana shielded cable 36” SM-CBL36 ($39.00).

• Multi Stacking Double Banana shielded cable 48” SM-CBL48 ($43.00).

Mini DIN Trigger, 6-Wire

• Ohms connector SM2060-CON7 ($14.00).

• Lab View VI’s library SM204x.llb (free).

• Extended 3 Year warrantee (does not include calibration) $150.00 for SM2060 and SMX2060, $240 for the

SM2064 and SMX2064.

Signametrics 26

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 DMM is shipped with the Digital Multimeter module; Installation CD and a floppy disk that contain the calibration and verification files. Also included is the Certificate of Calibration.

3.1 Setting the DMM

The SM2060 series DMM’s are PCI plug-and-play devices and do not require any switch settings, or other adjustments prior to installation.

The SM60CAL.DAT file supplied with your DMM has a unique calibration record for that DMM (See "Calibration" at the end of this manual.) When using multiple DMM’s in the same chassis, the SM60CAL.DAT

file must have a calibration record for each DMM. Append the unique calibration records of each DMM into one

SM60CAL.DAT file using a text editor such as Notepad. The default location for the SM60CAL.DAT file is at

the root directory C:\.

3.2 Installing the DMM Module

Warning

To avoid shock hazard, install the DMM only into a personal computer that has its power line connector connected to an AC receptacle with an Earth Safety ground.

After installation, check to see that no loose wires or ribbon cables infringe upon any of the internal circuits of the DMM, as this may apply measurement voltages to your computer, causing personal injury and/or damage to your computer!

Caution: Only install the DMM module with the power turned OFF to the PC!

Use extreme care when plugging the DMM module(s) into a PCI bus slot. If possible, choose an empty slot away

from any high-speed boards (e.g. video cards) or the power supply. Please be patient during the installation process! The DMM comes with 4 safety-input jacks. Because of their necessary size, they are a tight fit in many

PC chassis. Insert the bracket end of the DMM into your PC first, watching for any interference between the safety

input jacks and your PC chassis. “Sliding” the bracket end of the DMM into the chassis may be helpful. Be

patient! You should only have to install it once!

3.3 Installing the Software

It is recommended that you first plug in the DMM into the PC chassis, than turn on the computer power. The first time you power up your computer with the DMM installed, your computer will detect it as new hardware and prompt you for a driver. The driver your computer requires is located on the installation CD (SM2060.INF).

Following the above driver installation, run the ‘SETUP’ program provided on the CD. This takes care of all

installation and registration requirements of the software. If you are installing the DMM on a computer that had an SM2060 series install in it, you should first uninstall the old software. Also make sure you backup and remove the old calibration record (SM60CAL.DAT). For a clean reinstallation remove all INF files containing reference to the Signametrics DMM. Depending on operating system, these files will be located at Windows\inf, Windows\inf\other or WINNT\inf. The files will be named Oemx.INF where x is 0,1,2,… and/or SIGNAMETRICSSM2060.INF. If present, these files will prevent “Found New Hardware” wizard from detecting the new DMM.

27 Signametrics

3.4 DMM Input Connectors

Before using the DMM, please take a few moments and review this section to understand where the voltage,

current, or resistance and other inputs and outputs should be applied. This section contains important

information concerning voltage and current limits. Do not exceed these limits, as personal injury or damage to the instrument, your computer or application may result.

Figure 3-1. The DMM input connectors.

V, Ω + This is the positive terminal for all Volts, 2WΩ, capacitance, diode and inductance measurements, and for sourcing of VDC, VAC and IDC. It is also the Source HI for 4WΩ measurements. The maximum input across V, Ω

+ and V, Ω - is 300 VDC or 250 VAC when in the measuring mode. When in the sourcing mode, the maximum input allowed before damage occurs is 100 volts.

V, Ω - This is the negative terminal for all Volts, 2WΩ, capacitance diode and inductance measurements, and or sourcing of VDC, VAC and IDC. It is also the Source LO for 4WΩ. Do not float this terminal or any other DMM terminal more than 300 VDC or 250 VAC above Earth Ground. (Also, see Trig, 6W Guard below.)

I + This is the positive terminal for all Current measurements. It is also the Sense HI for 4WΩ measurements and

6WΩ guarded measurements. The maximum input across I, 4WΩ + and I, 4WΩ - is 2.5 A. Do not apply more

than 5 V peak across these two terminals!

I – This is the negative terminal for all Current measurements. In the Current modes, it is protected with a 2.5 A, 250 V Fast Blow fuse (5 x 20 mm). It is also the Sense LO for 4WΩ measurements and 6WΩ guarded measurements. V, Ω - and I, 4WΩ - should never have more than 5 V peak across them.

Signametrics 28

TRIG / GUARD Both the Trigger and Guard functions are at the DIN-7 connector. This group of pins includes

the positive and negative hardware trigger input lines and the two SM2064 Guarded Measurement Force and Sense signals. The external trigger initiates reading(s) into the onboard buffer, and the 6W guard signals facilitate incircuit resistor measurements by means of isolating a loading node. The DIN-7 plug can be ordered from Signametrics and is also available at many electronic hardware distributors. The connector is generically referred to as a mini DIN-7 male. The trigger signal should be in the range of 3 V to 12 V peak. The two 6W guard signals should never have more than 5 V peak across them.

Warning! The DIN connector pins are protected to a maximum of 35 V with respect to the PC chassis and any other DMM terminal. Do not apply any voltages greater than 35 V to the DIN connector pins. Violating this limit may result in personal injury and/or permanent damage to the DMM.

DIN-7, Pin number Function 2 Sync output, referenced to pin 4 7 External Trigger input, Positive 4 Trigger and Sync Common 1 Guard Source (SM2064) 6 Guard Sense (SM2064)

DIN-7 Connector Pin Description, view from bracket side.

3.5 Starting the Control Pane

You can verify the installation and gain familial rity with the DMM by exercising its measurement functions using the Windows based Control Panel. To run the control panel, double click the “SM2064.EXE” icon. If you do not hear the relays click, it is most likely due to an installation error. Another possible source for an error is that the

SM60CAL.DAT file does not correspond to the installed DMM.

When the DMM is started the first time, using the provided control panel (SM2064.EXE), it takes a few extra seconds to extract its calibration data from the on-board store, and write it to a file C:\SM60CAL.DAT

The Control Panel is operated with a mouse. All functions are accessed using the left mouse button. When the DMM is operated at very slow reading rates, you may have to hold down the left mouse button longer than usual for the program to acknowledge the mouse click.

29 Signametrics

Note: The SM2060 front panel powers up in DCV, 0.5s Aperture, 0 Read Interval and 240 V range. If the DMM operated in Autorange, with an open input, it will switch between the 2.4V and 24V ranges every few seconds, a range change occurs. This is perfectly normal with ultra high impedance DMM’s such as the SM2060. This phenomenon is caused by the virtually

put will read whatever charge is associated with the signal conditioning of the DMM. As this electrical charge

in changes, the SM2060 will change ranges, causing the range switching. This is normal.

infinite input impedance of the 2.4V DC range. On these ranges, an open

3.6 Using the Control Panel

s a

The Control Panel for the SM2064. The three main groups include Measure, Source and Figure 3-2.

nge buttons. The Range but

Ra tons are context sensitive such that only “240m, 2.4, 24, 240 and 330 appear when in AC Voltage Function is selected, and 2.4m, 24m, 240m and 2.4 appear when AC Current functions is selected, etc.

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 programming environment. T

f the SM2060 provides a powerfuo ut are in the software.

DC/AC This function switches between DC and AC. This is applicable for the following DMM functions:

Voltage, Current, and Voltage-Source. If Voltage-Source is the function presently in use, the Source control under the Tools menu can be used to set frequency and amplitude in ACV, and amplitude only in DCV and DCI.

l set of capabilities. Some of the functions are not included in the control panel,

he software command language

Relative This is the Relative function. When activated, the last reading is stored and subtracted from all

bsequent readings. This is a very important function when making low-level DCV measurements, or in 2WΩ.

su For example, when using 2WΩ, you can null out lead resistance by shorting the leads together and clicking on

Relative. When making low level DC voltage measurements (e.g., in the µV region), first apply a copper short to the V,Ω + & - input terminals, allow the reading to stabilize for a few seconds, and click on Relative. This will correct for any offsets internal to the SM2060. The Relative button can also be used in the Percent and dB

deviation displays (shown below), which are activated using the

The Min/Max box can be used to analyze variations in terms of Min, Max, Percent and dBV. This display can be activated by selecting the Min/Max/Deviation from the Tools menue. For instance, testing a circuit bandwidth with an input of 1V RMS, activate the Relative function with the frequency set to 100Hz, than sweep gradually the frequency, and monitor the percent deviation as well as the dBV error and capture any response anomalies with the Min/Max display. The left display indicates peaking of 2.468% (0.21 dBV) and maximum peaking in the response of +56.24mV and a notch of –

10.79mV from the reference at 100Hz.

Tools in the top menu.

Aperture Box: Controls the SM2060 reading aperture. As aperture decreases, the measurement noise increas

For best accuracy set to the longest aperture acceptable for the application. Also consider the line frequency (50 Hz) of operation when setting it, as certain apertures have better noise rejection at either 50 or 60 Hz. (See

Signametrics 30

es.

/60

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Signametrics SM2060, SMX2060, SMX2064, SM2064 Operator's Manual

Specifications and Main Features

Frequently Asked Questions

User Manual