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SM2020

5-1/2 digit DMM

picture of 5 1/2 Digit DMM Card (21K)

Features

  • Flexible, full featured autoranging DMM
  • DC & AC Volts & Current, 2-wire & 4-wire Ohms
  • True AC RMS measurements, 10Hz to 100KHz
  • Measurement range from 1µV to 300V
  • Self-Calibrating
  • Up to 1000 Samples/Sec. for for SM2020-CT (200 Samples/Sec. for SM2020)
  • Optional 2Hz to 300KHz Frequency Counter (SM2020-CT)
  • 300V isolation barrier

Description

The SM2020 is a 5-1/2 digit DMM that plugs into any full length PC ISA bus slot. It has all the functionality and performance of a bench top instrument. The SM2020CT version adds frequency counting, external triggering and a programmable level trigger.

The PC plug in design provides the convenience of automated measurement cost effectively in the smallest possible footprint with no compromise in performance. There is no dealing with unnecessary interconnecting or power cables. Signal leads go straight from the SM2020 in your PC to the device under test or scanner. It couldn't be more straight forward.

The front panel for the SM2020 appears on your PC monitor. All of the familiar DMM controls are available on this virtual front panel in either DOS or Windows. You can control the SM2020 without any programming or configuration using your mouse to manipulate the virtual front panel controls straight out of the box.

Automated applications can be configured using TestPoint, ATEasy, Matlab, Visual Basic or C. To get you started, source code for the virtual front panel (written in Visual Basic) is provided with your SM2020.

The SM2020 is controlled with high level commands to its on-board controller. The controller both simplifies programming and minimizes overhead on the PC. This architecture also insures that the SM2020 will operate well with all operating systems even those with slower real time response.

For safety and accuracy the SM2020 has a 300V isolation barrier from the PC. The rugged input protection is virtually indestructible. Accuracy is maintained with state of the art, precision components.

Hardware Features

  • Flexible, full featured autoranging DMM
  • DC & AC Volts & Current, 2-Wire & 4-Wire Ohms
  • True AC RMS measurements, 10Hz to 100kHz
  • Measure 1 µV to 300 V
  • Self-calibrating
  • Up to 1000 samples/sec SM-2020CT (200 samples/sec SM-2020)
  • Optional frequency counter 2 Hz to 300 kHz (SM-2020CT)
  • 300V isolation barrier
  • CE Approved

Software Features

  • Extensive Windows support Win 3.x, Win 95, Win NT
  • Language support - Visual Basic, MSVisual C++, Quick C, Borland C++
  • Package support - TestPoint, ATEasy, Matlab, VBA & more

The SM2020(-CT) is supplied with software drivers to support development environments such as: Microsoft Visual C++, Borland C, ATEasy, Microsoft Visual Basic, Borland Pascal, Borland Delphi, and more. A virtual panel is provided for standalone applications and debug mode.

  • 32-bit MS-Windows DLL - to be used with a WIN32 application running under Windows 95 and Windows NT.
  • 16-bit MS-Windows DLL (Dynamic Link Library) - to be used with a 16-bit Windows application running under Windows 3.1.
  • DOS static libraries - Microsoft format and Borland format - used by DOS applications compiled with Microsoft or Borland development tools.

 

Applications

  • Automated production testing
  • Low level resistance, voltage and current measurements
  • Laboratory automation
  • OEM equipment
  • Portable/field test

Specifications

DC VOLTAGE

Range

Full Scale
4 1/2 Digits

Resolution

Accuracy 18°C to 28°C
% of reading + Number of counts
(Note 1)

 

 

 

 

One
Year

Two Years

Three Years

Notes

300mV

300.00mV

1µV

0.024 +
6(Note 2)

0.034 +
6(2)

0.042 +
6(2)

1000M Input Impedance, 300mV and 3V Range

3V

3.00000V

10µV

0.010 +
4

0.013 +
6

0.017 +
7

30V

30.0000V

100µV

0.022 +
5

0.031 +
7

0.040 +
8

10M Input Impedance, 30V and 300V Range

300V

300.000V

1mV

0.018 +
5

0.026 +
6

0.030 +
7

DC CURRENT

Range

Full Scale
4 1/2 Digits

Resolution

Accuracy 18°C to 28°C
% of reading + Number of counts(1)

 

 

 

 

One Year

Two Years

Three Years

Notes

3mA

3.00000mA

10nA

0.070 + 8

0.090 + 8

0.120 + 8

Burden voltage <0.5V for the 3mA and 30mA range, <1.2V for the 300mA range

Protected with 500mA fuse (5 x 20mm, 250V fast)

30mA

30.0000mA

100nA

0.090 + 15

0.120 + 17

0.140 + 17

300mA

300.000mA

1µA

0.090 + 15

0.120 + 17

0.140 + 17

RESISTANCE

Range

Full Scale
4 1/2 Digits

Resolution

Accuracy 18°C to 28°C
% of reading + Number of
counts(1)

 

 

 

 

One Year

Two Years

Three Years

 

300

300.000

0.001

0.030 + 6

0.050 + 6

0.060 + 6

 

3K

3.00000K

0.01

0.029 + 4

0.040 + 5

0.050 + 6

 

30K

30.0000K

0.1

0.029 + 5

0.040 + 6

0.050 + 6

 

300K

300.000K

1

0.029 + 5

0.040 + 6

0.050 + 6

 

3M

3.00000M

10

0.190 + 10

0.280 + 10

0.330 + 10

 

30M

30.0000M

100

0.650 + 10

0.700 + 10

0.750 + 10

 

AC VOLTAGE, TRUE RMS

Range

Frequency

Accuracy 18°C to 28°C
% of reading +
Number of counts(1)

 

 

 

One
Year

Two Years

Three Years

Notes

300mV

10Hz to 20Hz

2.5 + 400

2.8 + 400

2.9 + 400

Input Resistance 1M, shunted by <80pF, all ranges

Crest Factor 3 at Full Scale, increasing to 7 at lowest specified voltage

20Hz to 45Hz

1.0 + 400

1.2 + 400

1.3 + 400

45Hz to 1KHz

0.3 + 300

0.4 + 300

0.5 + 300

1KHz to 10KHz

0.4 + 350

0.5 + 400

0.6 + 350

10KHz to 50KHz

2.0 + 400

2.1 + 400

2.2 + 400

50KHz to 100KHz

4.0 + 500

4.3 + 500

4.5 + 500

3V to 300V

10Hz to 20Hz

2.5 + 300

2.6 + 300

2.7 + 300

20Hz to 45Hz

1.0 + 300

1.2 + 300

1.3 + 300

45Hz to 1KHz

0.1 + 275

0.2 + 275

0.3 + 275

1KHz to 10KHz

0.3 + 275

0.4 + 275

0.5 + 275

10Hz to 50KHz

1.0 + 300

1.1 + 300

1.2 + 300

50KHz to 100KHz

4.0 + 500

4.3 + 500

4.5 + 500

AC CURRENT, TRUE RMS

Range

Frequency

Accuracy 18°C to 28°C
% of reading +
Number of counts(1)

 

 

 

One
Year

Two Years

Three Years

Notes

3mA

10Hz to 20Hz

2.2 + 400

2.3 + 400

2.4 + 400

Burden voltage <0.5Vrms for the 3mA and 30mA range, <1.2Vrms for the 300mA range

Crest Factor 3 at Full Scale, increasing to 7 at lowest specified current

Protected with 500mA fuse (5 x 20mm, 250V fast)

20Hz to 45Hz

0.8 + 400

0.9 + 400

1.0 + 400

45Hz to 1Hz

0.7 + 300

0.8 + 300

0.9 + 300

1KHz to 10KHz

0.8 + 400

0.9 + 400

1.0 + 400

30 to 300mA

10Hz to 20Hz

2.0 +300

2.1 + 300

2.2 + 300

20Hz to 45Hz

0.8 + 300

0.9 + 300

1.0 + 300

45Hz to 1KHz

0.7 + 300

0.8 + 300

0.9 + 300

1KHz to 10KHz

0.8 + 400

0.9 + 400

1.0 + 400
Notes:
1. To convert "Number of Counts" to volts, multiply the "Resolution" by the "Number of Counts". For example: the 300mVDC Range has 6 counts of error or 6mV.
2. Within one hour of DCV zero, using Relative Control.
 

FREQUENCY (-CT MODEL)

Frequency Range

5Hz to 300KHz

Period Range

5µSec to 200mSec

Resolution

5 Digits

Accuracy

100ppm ± 2 counts

Input Level

15% of Full Scale MIN

TRIGGERED MEASUREMENT (-CT MODEL)

External Trigger

± 3.5VDC Threshold

Internal Trigger

± 310VDC in 300V range

VAC RMS Thres

Programmable according to range

# Readings

1 to 64 Stored Internally

Reading Rate

10 to 1000 Readings/Sec

GENERAL SPECIFICATIONS

Reading Rate
      (4-Wire Ohms)

 
0.1 to 20 RPS

Reading Rate
      (Other functions)

 
1 to 200 RPS

Temperature Range
      Operating
      Storage

 
0°C to 50°C
-20°C to +70°C

Overload Protection

300VDC, 250VAC

Isolation

300VDC, 250VAC
from earth ground

Power Requirements

+5V, 300mA Max.

Size

13.125" x 4.5" (Full length ISA-Slot)

Weight

720g

Connections

Connections to the SM2020 and the SM2020-CT are made using 4 banana jacks (not included). A mini-phone jack is used for the trigger input of the SM2020-CT (Counter/Trigger option).

Ordering Information

 

SM2020

Full featured 5 1/2 digit DMM

 Order directly from www.signametrics.com

SM2020-CT

SM2020 with frequency counter and period measurement

 Order directly from www.signametrics.com

 

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sales@team-solutions.com


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