2.0 SPECIFICATIONS. Signametrics SMX2040

2.0 Specifications

2.1 DC Voltage Measurement

Input Characteristics

• Input Resistance 330 mV & 3.3 V Ranges: >10 GΩ ,

• Input Resistance 33 V & 330 V Ranges: 10.0 MΩ

Accuracy ± (% of reading + Volts) [1]

6 ½ Digits

Resolution 24 hours

23

°C ± 1°C

330 mV 330.0000 mV

100

ηV

3.3 V 3.300000 V

1

µV

33 V 33.00000 V

10

µV

330 V 330.0000 V

100

µV

0.003 + 4.5

0.002 + 10

0.003 + 250

µV

µV

µV

0.004 + 1 mV

90 Days

23

°C ± 5°C

One Year 23

°C

± 5°C

0.004 + 5.5

µV

0.007 + 8

µV

0.0025 + 12

µV

0.0045 + 17

µV

0.004 + 280

µV

0.007 + 330

µV

0.005 + 1.2 mV 0.008 + 1.5 mV

[1] With reading rate set to 10 readings per second (rps) or slower, and within one hour of DCV zero, using Relative control.

DCV Noise Rejection Normal Mode Rejection, at 50, 60, or 400 Hz ± 0.5%, is better than 95 dB for reading rates of 10 rps or lower. Common Mode Rejection (with 1 k

Ω lead imbalance) is better than 120 dB for these conditions.

2.2 DC Current Measurement

Input Characteristics

• Burden Voltage < 350 mV for all ranges

• Protected with 2.5A fuse ( 5x20mm, 250 V Fast)

Accuracy ± (% of reading + Amps) [1]

3.3 mA

33 mA

330 mA

2.5 A

5 ½ Digits

3.30000 mA

33.0000 mA

330.000 mA

2.50000 A

Resolution

10

ηA

100

ηA

1

µA

10

µA

24 hours

23

°C ± 5°C

90 Days

23

°C ± 5°C

0.052 + 200

ηA

0.07 + 350

ηA

0.04 + 1

µA

0.05 + 30

µA

0.55 + 50

µA

0.06 + 2

µA

0.055 + 40

µA

0.6 + 200

µA

One Year 23

°C

± 5°C

0.1 + 400

ηA

0.1 + 3

µA

0.075 + 60

µA

0.65 + 350

µA

[1] With reading rate set to 10 rps or slower, and within one hour of DCI zero, using Relative control.

2.3 AC Voltage Measurements

Input Characteristics

• Input Resistance 1.0 MΩ, shunted by < 100 pF, all ranges

• Crest Factor 3 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

2.3.1 AC Voltage True RMS Measurement

Range

330 mV

3.3 V

33 V

250 V [2]

Full Scale 6 ½ Digits

330.0000 mV

3.300000 V

33.00000 V

250.0000 V

Lowest specified Voltage

5 mV [1]

10 mV

100 mV

1 V

Resolution

100

ηV

1

µV

10

µV

100

µV

[1] Between 5 mV and 10 mV, add 100

µV additional error to the accuracy table below. In many computer installations, if the DMM is not near a noisy board, usable voltage measurements of 1 mV can be obtained.

[2] Signal is limited to 8x10

6

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

32 kHz, or 8x10

6

Volt x Hz.

9 Signametrics