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Specifications
DC CURRENT |
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Range |
Full Scale Reading |
Resolution |
Accuracy 90 Days 23°C ± 5°C 1 |
Accuracy 1 Year 23°C ± 5°C 1 |
3.3 mA |
3.30000 mA |
10 nA |
0.07 + 200 nA |
0.08 + 200 nA |
33 mA |
33.0000 mA |
100 nA |
0.06 + 1.5 µA |
0.07 + 1.5 µA |
330 mA |
330.000 mA |
1 µA |
0.08 + 20 µA |
0.1 + 20 µA |
2.5 A |
2.50000 A |
10 µA |
0.32 + 250 µA |
0.4 +250 µA |
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1 Accuracy is % of reading + Amps |
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AC VOLTS (RMS) |
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Range |
Full Scale Reading |
Resolution |
Accuracy 90 Days 23°C ± 5°C 1 |
Accuracy 1 Year 23°C ± 5°C 1 |
330 mV (Signal >5 mV) |
330.000 mV |
100 nV |
10 Hz - 20 Hz |
3.0 + 400 µV |
20 Hz - 47 Hz |
0.8 + 400 µV |
47 Hz - 10 kHz |
0.13 + 300 µV |
10 kHz - 50 kHz |
1.3 + 400 µV |
50 kHz - 100 kHz |
3.9 + 500 µV |
3.3 V (Signal >10 mV) |
3.300000 V |
1 µV |
10 Hz - 20 Hz |
3.0 + 3 mV |
20 Hz - 47 Hz |
0.8 + 3 mV |
47 Hz - 10 kHz |
0.07 + 2.75 mV |
10 kHz - 50 kHz |
0.7 + 3 mV |
50 kHz - 100 kHz |
3.9 + 3 mV |
33 V (Signal >100 mV) |
33.00000 V |
10 µV |
10 Hz - 20 Hz |
3.0 + 30 mV |
20 Hz - 47 Hz |
0.8 + 30 mV |
47 Hz - 10 kHz |
0.07 + 27.5 mV |
10 kHz - 50 kHz |
0.7 + 30 mV |
50 kHz - 100 kHz |
3.9 + 30 mV |
250 V 2 (Signal >1 V) |
250.0000 V |
100 µV |
10 Hz - 20 Hz |
3.0 + 300 mV |
20 Hz - 47 Hz |
0.8 + 300 mV |
47 Hz - 10 kHz |
0.09 + 275 mV |
10 kHz - 50 kHz |
0.7 + 300 mV |
50 kHz - 100 kHz |
3.9 + 300 mV |
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1 Accuracy is % of reading + Volts. 2 Signal is limited to 8x106 Volt Hz Product. |
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AC CURRENT (RMS) |
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Range |
Full Scale Reading |
Resolution |
Accuracy 90 Days 23°C ± 5°C 1 |
Accuracy 1 Year 23°C ± 5°C 1 |
3.3 mA (Signal >50 uA) |
3.30000 mA |
1 nA |
10 Hz - 20 Hz |
2.7 + 4 µA 1 |
20 Hz - 47 Hz |
0.9 + 4 µA |
47 Hz - 1 kHz |
0.18 + 3 µA |
1 kHz - 10 kHz |
0.5 + 4 µA |
33 mA (Signal >500 uA) |
33.0000 mA |
10 nA |
10 Hz - 20 Hz |
2.6 + 30 µA |
20 Hz - 47 Hz |
0.9 + 30 µA |
47 Hz - 1 kHz |
0.15 + 30 µA |
1 kHz - 10 kHz |
0.4 + 40 µA |
330 mA (Signal >5 mA) |
330.000 mA |
100 nA |
10 Hz - 20 Hz |
2.7 + 400 µA |
20 Hz - 47 Hz |
0.9 + 400 µA |
47 Hz - 1 kHz |
0.22 + 300 µA |
1 kHz - 10 kHz |
0.5 + 400 µA |
2.5 A (Signal >50 mA) |
2.50000 A |
1 µA |
10 Hz - 20 Hz |
2.5 + 3 mA |
20 Hz - 47 Hz |
0.8 + 3 mA |
47 Hz - 1 kHz |
0.4 + 3 mA |
1 kHz - 10 kHz |
0.6 + 4 mA |
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1Accuracy is % of reading + Amps |
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Temperature (SMX2044) |
RTD Type 1 |
Ro () |
Resolution |
Temperature range |
Accuracy 23°C ± 5°C One Year 1 |
pt385, pt3911, pt3916, pt3926 |
100 , 200 |
0.01 °C |
-150 to 650 °C |
±0.06 °C |
pt385, pt3911, pt3916, pt3926 |
500 , 1 k |
0.01 °C |
-150 to 650 °C |
±0.03 °C |
Cu (Copper) |
Less than 12 |
0.01 °C |
-100 to 200 °C |
±0.18 °C for temp. <= 20°C, otherwise ±0.05 °C |
Cu (Copper) |
Higher than 90 |
0.01 °C |
-100 to 200 °C |
±0.10 °C for temp. <= 20°C, otherwise ±0.05 °C |
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1 These specifications are valid for 4-wire type RTD. |
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Leakage (SMX2044) |
Leakage reading |
Voltage range |
Accuracy 23°C ± 5°C One Year 1 |
1.00 nA to 100.00 nA |
-10 V to + 10 V |
2 + 350 pA |
100.00 nA to 1000.00 nA |
-9 V to + 9 V |
1.2 + 2 nA |
1000.00 nA to 3300.00 nA |
-7 V to + 7 V |
1.5 + 20 nA |
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1 These specifications are valid for 4-wire type RTD. |
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Peak to Peak, Crest and Median (SMX2044) |
ACV Peak-to-Peak 1 |
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ACV Range |
Full Scale reading (Vp-p) |
Resolution |
Lowest specified input voltage (Vp-p) |
Accuracy 23°C ± 5°C One Year 2 |
330 mV |
1.85 V |
1 mV |
0.1 V |
2.1 ± 10 mV |
3.3 V |
18.5 V |
10 mV |
1 V |
1.5 ± 60 mV |
33 V |
185 V |
100 mV |
10 V |
1 ± 600 mV |
250 V |
850 V |
1 V |
100 V |
1 ± 6V |
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1 Peak-to-Peak measurement requires signal frequency range is 30 Hz to 30 kHz. 2 Accuracy is % of reading + Volts |
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AC Crest Factor1 |
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ACV Range |
Resolution |
Lowest specified input voltage (Vp-p) |
Accuracy 23°C ± 5°C One Year 2 |
330 mV |
0.01 |
0.1 V |
2.5 ± 0.1 |
3.3 V |
0.01 |
1 V |
2.0 ± 0.1 |
33 V |
0.01 |
10 V |
2.0 ± 0.1 |
250 V |
0.01 |
100 V |
2.0 ± 0.1 |
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1 Specified from 30 Hz to 10 kHz. Allowed signal frequency range is 30 Hz to 30 kHz. 2 Accuracy is % of reading + Constant |
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AC Median 1 |
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ACV Range |
Full Scale reading |
Resolution |
Accuracy 23°C ± 5°C One Year 2 |
330 mV |
± 0.950 V |
1 mV |
3.3 ± 17 mV |
3.3 V |
± 9.50 V |
10 mV |
3 ±160 mV |
33 V |
± 95.0 V |
100 mV |
3 ±1.4V |
250 V |
± 425 V |
1 V |
3% ± 12V |
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1 Specified from 30 Hz to 10 kHz. Allowed signal frequency range is 30 Hz to 30 kHz. 2 Accuracy is % of reading + Volts |
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Timing Function (SMX2044) |
Timing Threshold DAC |
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Selected VAC range |
Threshold Range |
Threshold DAC Resolution |
Typical one year setting uncertainty 1 |
330 mV |
-1.0 V to +1.0 V |
0.5 mV |
0.2% + 4 mV |
3.3 V |
-10.0 V to +10.0 V |
5.0 mV |
0.2% + 40 mV |
33 V |
-100.0 V to +100.0 V |
50 mV |
0.2% + 0.4 mV |
250 V |
-500 V to +500 V |
500 mV |
0.2% + 4 V |
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1 Accuracy ± (% of setting + volts) |
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ACV Frequency |
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Frequency Range |
1 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 |
4 mHz |
20 mHz |
200 mHz |
2 Hz |
5 Hz |
Input Signal Range 1 |
10 - 200% of range |
10 - 200% of range |
10 - 200% of range |
10 - 200% of range |
25 - 200% of range |
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1 Input RMS voltage required for a valid reading. For example, 10% -200% of range indicates that in the 330 mVAC range, the input voltage should be 33 mV to 660 mV. |
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ACI Frequency |
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Frequency Range |
1 Hz - 100 Hz |
100 Hz - 1 kHz |
1 kHz - 10 kHz |
10 kHz - 100 kHz |
Resolution |
1 mHz |
10 mHz |
0.01% ±200 mHz |
0.01% ±2 Hz |
Input Signal Rangem, 3.3 mA Range |
10% - 500% |
10% - 500% |
10% - 500% |
10% - 500% |
Input Signal Range, 33 mA Range |
50% - 100% |
50% - 100% |
50% - 100% |
50% - 100% |
Input Signal Range, 330 mA, 2.5 A ranges |
50% -110% |
50% - 100% |
50% - 100% |
50% - 100% |
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Duty Cycle |
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Frequency Range |
1 Hz - 100 Hz |
100 Hz - 1 kHz |
1 kHz - 10 kHz |
10 kHz - 100 kHz |
Resolution |
0.02% |
0.2% |
2% |
20% |
Typical Uncertainty is ±0.03% of reading ± adder shown |
0.03% |
0.3% |
3% |
30% |
Full scale reading |
100.00% |
100.00% |
100.00% |
100.00% |
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Pulse Width |
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Polarity |
Frequency range |
Resolution |
Width range |
Uncertainty |
Positive and Negative pulse |
1 Hz to 100 kHz |
2 µS |
2 µS to 1S |
0.01% ±4 µS |
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Capacitance Measurements (SMX2044) |
Capacitance |
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Range |
Full Scale Reading |
Resolution |
Accuracy One Year 23°C ± 5°C 1 |
10 nF |
11.999 pF |
1 pF |
2 ± 4 pF 2 |
100 nF |
119.99 nF |
10 pF |
2 ± 100 pF |
1 µF |
1.1999 µF |
100 pF |
2 ± 1 nF |
10 µF |
11.999 µF |
1 nF |
2 ± 10 nF |
100 µF |
119.99 nF |
10 nF |
2 ± 100 nF |
1 mF |
1.1999 mF |
100 nF |
2.5 ± 2 µF |
10 mF |
11.999 mF |
1 µF |
3.5 ± 50 µF |
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1 Accuracy is % of reading + Farads 2 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 10 nF range, which is capable of measuring down to 0 pF |
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Inductance Measurements (SMX2044) |
Capacitance |
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Range |
Full Scale Reading |
Resolution |
Default Frequency |
Accuracy One Year 23°C ± 5°C 1 |
33 µH |
33.00 µH |
1 nH |
75 kHz |
3 + 500 nH 2 |
330 µH |
330.0 µH |
10 nH |
50 kHz |
2 + 3 µH |
3.3 mH 3 |
3.300 mH |
100 nH |
4 kHz |
1.5 + 25 µH |
33 mH |
33.00 mH |
1 µH |
1.5 kHz |
1.5 + 200 µH |
330 mH |
330.0 mH |
10 µH |
1 kHz |
2.5 + 3 mH |
3.3 mH |
3.300 µH |
100 µH |
100 kHz |
3 + 35 mH |
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1 Accuracy is % of reading + Henry 2 Accuracy is specified for values greater than 5% of the selected range 3 Minimum measurable 500 nH |
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AC/DC VOLTAGE SOURCE AND CURRENT SOURCE (SMX2044) |
DC Voltage Source |
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Parameter |
Closed Loop |
Open Loop |
Output Voltage range |
-10.000 V to +10.000 V |
Maximum Current source/sink |
10 mA |
DAC resolution |
16 bits |
12 bits |
Accuracy 23°C ±5°C One Year 1 |
0.015% ± 250 µV |
0.13% ± 35 mV |
Typical setting time |
3 s |
2 ms |
Typical source resistance |
250 |
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1 Accuracy is % of reading + Volts |
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AC Voltage Source |
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Parameter |
Closed Loop |
Open Loop |
Output Voltage range |
0 to 20 V peak-to-peak (0 to 7.071068V RMS) |
DAC resolution |
16 bits |
12 bits |
Peak Current |
10 mA |
Accuracy 23°C ±5°C One Year 1 |
ACV spec ± 2 mV |
ACV spec + 0.8% ± 8 mV |
Typical setting time |
10 s |
1.5 s |
Typical source resistance |
250 |
Frequency range / resolution |
2 Hz to 75 kHz / 2 Hz |
Frequency stability |
100 ppm ± 1 Hz |
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1 Accuracy is % of reading + Volts |
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DC Current Source |
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Range |
Compliance Voltage |
Resolution |
Minimum level |
Accuracy 23°C ± 5°C One Year 1 |
1.25 µA |
4.2 V |
400 pA |
1 nA |
0.2% + 1 nA |
12.5 µA |
4.2 V |
4 nA |
10 nA |
0.1% + 10 nA |
125 µA |
4.2 V |
40 nA |
100 nA |
0.1% + 100 nA |
1.25 mA |
4.2 V |
400 nA |
1 µA |
0.1% + 1 µA |
12.5 mA |
4.0 V |
4 µA |
10 µA |
0.1% + 10 µA |
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1 Accuracy is % of reading + Amps |
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OTHER SPECIFICATIONS |
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Temperature Coefficient |
All Functions Less than 0.1 x accuracy specification per °C at 23°C ± 5°C |
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Reading Rate |
(user selectable) 0.5 to 1,000 rps up to 10 rps, 6-½ digits up to 30 rps, 5-½ digits |
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Hardware Interface |
PXI Bus |
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Overload Protection |
(voltage inputs) 300 VDC, 250 VAC (DIN Connector) 50 VAC |
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Isolation |
300 VDC, 250 VAC from Earth Ground |
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Maximum Input (Volt x Hertz) |
8x106 Volt x Hz Common Mode input (across Voltage HI & LO) 1x106 Volt x Hz Common Mode input (across Voltage HI & LO) relative to Earth Ground) |
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Safety |
Designed to IEC 1010-1 guidlines, for IEC 664 Installation Category II. All DMM inputs are to be based in protected, low energy circuits only. Approved |
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Calibration |
Calibrations are performed at the factory in a computer with a 10°C internal temperature rise. All calibration contants are stored in a text file. Calibration can be performed by any calibration laboratory having the appropriate equipment. |
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Temperature Range |
0°C to 50°C, operating |
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Power |
+5 VDC, 300 mA maximum |
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Size |
8.2" x 4.4" |
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INPUT CHARACTERISTICS |
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DC Volts |
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Input Resistance |
330 mV & 3.3 V Ranges |
>10 G |
33 V & 330 V Ranges |
10 M |
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Noise Rejection |
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NMRR 50, 60, 400 Hz |
>95 dB |
CMRR @ ²10 rps with 1 k lead imbalance |
>120 dB |
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DC Current |
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Burden Voltage |
<350 mV for all ranges |
Over Current Protected |
Fuse, top accessible |
AC Volts |
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Input Resistance |
1 M, shunted by < 100 pF, all ranges |
Crest Factor |
3 at Full Scale, increaseing 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 |
CMRR @ ²10 rps with 1 k lead imbalance |
>60 dB |
AC Current |
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Burden Voltage |
350 mV RMS all Ranges |
Crest Factor |
3 at Full Scale, increasing to 7 at Lowest Specified Current |
Over Current Protected |
2.5 A fuse, top accessible |
Trigger Input |
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Input active voltage level range |
+3 V to +15 V |
Minimum input current |
1 mA |
Timing Characteristics |
Trigger occurs within 1/reading rate |
Isolation |
±35 V from analog DMM inputs and from computer chassis Earth Ground |
Connections
Connections to the SMX2040 series are made using 4 banana jacks (not included). A DIN connector on the SMX2040 series carries trigger input and the 6- wire guarded force and sense lines
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Descripcion
Features
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Flexible, full-featured auto-ranging DMM |
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DC & AC Volts & Current, 2-Wire and 4-Wire Ohms |
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AC True RMS Measurements, 10 Hz to 100 kHz |
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Measure 1 µV to 330 V |
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Self-calibrating |
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Up to 1000 rps |
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Frequency counter 1 Hz to 300 kHz |
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300 V Isolation Barrier |
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Inductance |
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Capacitance |
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Leakage |
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6-Wire Guard |
The SMX2040 plugs into any PXI or CompactPCI chassis to provide a combination of resolution, accuracy and speed that surpasses rivals. A 6-½ digit display, 0.006% basic DCV accuracy and 1,000 rps assure you of measurements that are accurate, fast and repeatable. The SMX2044 adds a comprehensive repertoire of measurements and source functions. Both measurements and sourcing functions are isolated from the PXI bus and are therefore truly differential. An on-board controller responds to high level commands from the PXI bus, minimizing overhead.
The SMX2040 series is designed as a universal, multifunction DMM. Measurements commonly associated with "high-end" system DMMs are standard features with the SMX2040 family. Functions include 2-wire, 4-wire and 6-wire guarded resistance measurements, inductance and capacitance, leakage and temperature, RMS and peak-to-peak, frequency and timing, sourcing of voltage and current, and much more. The SMX2044 is best suited for applications demanding precision sources with simultaneous measurements such as in Parametric testing, while the SMX2040 is best suited where basic DMM functions are required.
The SMX2040 series' unique "Relative" function allows you to remove lead resistance or other fixed offsets in your measurement and to perform percent deviation and dB measurements. An external, level controlled trigger can be used for capturing single-shot events, and can store up to 64 measurements on-board.
Applications
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Automated production testing |
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Laboratory automation |
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Portable/field test |
Programming
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Supports Plug-and-PlayTM operating systems. |
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Intuitive GUI gets you up and making measurements in minutes. |
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Windows 98/95 and NT support for both textual programming languages such as ATEasy, Visual Basic, C, C++, and LabWindows/CVI, and graphical environments such as LabView and HPVee. |
Features
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Function |
SMX2040 DMM |
SMX2044 LCR Sourcing DMM |
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DCV 4 ranges, >10 GW and 10 MW input resistance |
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ACV 4 ranges, 1 M input |
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2-Wire Ohms, six ranges, 330 to 33 M |
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plus 33, 330 M |
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4-Wire Ohms, four ranges, 330 to 330 k |
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plus 33 range |
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DC current, four ranges, 3.3 mA to 2.5 A |
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AC current, four ranges, 3.3 mA to 2.5 A |
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Diode V/I characteristics at 100 nA to 1 mA |
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plus 10 mA |
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Auto range, relative |
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Min/Max, dB and percent deviation functions |
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On-board measurement buffer |
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Measurement rate: 0.2 to 1,000/sec |
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External and threshold trigger |
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Capacitance, seven ranges, 10 nF to 10 mF |
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Temperature (five basic RTD types) |
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Frequency / Period measurement |
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Pulse width, pos./neg, & duty cycle |
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Totalizer/event counter |
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Variable threshold DAC, all timing measure |
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Peak to Peak, Crest factor, Median |
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Internal DMM temperature sensor |
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6-wire Ohms (with force/sense) |
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Inductance, six ranges, 33 mH to 3.3 H |
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DCV source 0 to ±10.0 V |
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ACV source 0 to 20 V pk-pk, 2 Hz to 75 kHz |
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DC current source, 1 nA to 12.5 mA |
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Leakage (with external 1 Meg) |
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High Ohms range 1,000 Meg |
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6-wire Guarded Resistance Measurement (SMX2044)
The SMX2044 provides a guarded 6-wire resistance measurement method. It is used to make resistance measurements when the resistor-under-test has other shunting paths which can cause inaccurate readings. This method isolates the resistor-under-test by maintaining a guard voltage at a user defined node. Applications include in current test, Resistor Networks, etc.
Example: Assume a 30 k resistor is in parallel with two resistors (510 and 220 ), that are connected in series. By sensing the voltage at the top of the 30 k, and then applying this same voltage to the junction of the 510 and 220 there is no current flow through the shunting path. With this "guarding", the SMX2044 accurately measures the 30 k resistor.
Extended Resistance (SMX2044)
When utilizing the Leakage Measurement configuration, Use the following equation to derive the resistance being measured: Rx = Vs/I, where Vs is the DC voltage source, and I is the leakage current being measured. For example, if you set the leakage test voltage to 9.0V and measure 9 nA of leakage current, this corresponds to 1,000 M of resistance. This application is useful for testing cables, printed circuit boards, connectors and semiconductors.
Internal Temperature (SMX2044)
A special on-board temperature sensor allows monitoring of the DMM's internal temperature. This provides the means to determine when to run the self-calibration function (S-Cal) for the DMM, as well as predicting the performance of the DMM under different operation conditions. When used properly, this measurement can enhance the accuracy and stability of the DMM. It also allows monitoring of the PC internal temperature.
Capacitance Measurement (SMX2044)
The SMX2044 measures capacitance using a differential charge slew method, usable down to a few pF. With the exception of the 10 nF range, each of the ranges has a reading span from 5% of range to full scale. For testing surface mount parts, use the optional Signametrics SMT Tweezer probes.
Inductance Measurement (SMX2044)
The SMX2044 measures inductance using a precision AC source with a frequency range of 20 Hz to 75 kHz. Since inductors can vary greatly with frequency, you should choose the appropriate generator frequency. In addition to inductance, the inductor's Q factor is measured.
Sourcing Functions (SMX2044)
The SMX2044 adds a number of sourcing functions, giving great versatility for a variety of applications. All of the available sources, VDC, VAC, and IDC are isolated. This allows sourcing with a significant common mode voltage as well as the ability to connect several SMX2044 units in parallel for increased DC current, or in series for increased DC voltage.
Two D/A converters (DACs) are used for the source functions, a 12-bit DAC, and a Trim DAC. The last augments the 12-bit DAC to form a 16-bit composite DAC. For functions requiring high precision, use both DACs by selecting the ClosedLoop mode, otherwise only the 12-bit DAC is engaged.
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