Data Acquisition and Signal Conditioning Reference Materials

Description: In a vacuum, light travels 299,792,458 meters per second, which translates to over 670 thousand miles per hour. Light is so fast that it’s difficult to comprehend what that even means. ...

Description: Failure rate calculations for the SCM5B modules are derived from the MIL-HDBK-217E specification. The stress-analysis method is used at ground benign environment, 35°C temperature, and quality ...

Description: The NEC, National Electrical Code (Ref. 4) requires the installation of grounds for safety and does not allow load currents in ground lines. Unfortunately, unwanted ground currents (Ig) often exist ...

Description: Modern integrated circuit (IC) operational amplifiers (Op Amps) have made quality instrumentation signal conditioning economically practical. Although accurate and stable Op Amp ICs are available for ...

Description: How do I make use of the Shunt Calibration feature for the model 126? ...

Description: How can I translate the Error Code identified with a particular fault with my model 133 conditioner? Is there a definition of the particular error codes, since it is unclear what the error codes mean? ...

Description: Industrial environments are particularly challenging for data communications network designs for a variety of reasons. Typically rife with electromagnetic interference (EMI), unless every precaution ...

Description: High common-mode noise is a significant problem that automotive system designers must overcome when designing a practical and reliable powertrain drive system. Common-mode noise (also known as dV/dt ...

Description: This application note describes a method to automatically detect the memory size of a serial EEPROM connected to an I 2 C bus. The topics include: Automatic detection of memory size on the I 2 C bus ...

Description: Analog filters can be found in almost every electronic circuit. Audio systems use them for preamplification, equalization, and tone control. In communication systems, filters are used for tuning in ...

Description: A Microchip Technology analog-to-digital converter, a 2K-byte CMOS static RAM, and some gates and counters can be combined to form a low-cost, flexible, standalone data logging system. All the ICs are ...

Description: For reliable operation the optoisolator should be biased to saturation, so: IOPTO = + = 2k The introduction of single-voltage EPROMS and dynamic RAMs has permitted designers to produce complete ...

Description: Portability is and will continue to be one of the key features driving the design and development of new electronic equipment. Existing products such as palmtop computers, cellular phones and data ...

Description: System error budgets should be developed and analyzed as an integral part of system designs. System engineers must determine the necessary levels of accuracy for system elements such as field sensors, ...

Description: Bridge circuits have been in use for well over 150 years. To date, the bridge is still the most economical circuit technique for accurately measuring resistance. The original bridge circuit topology ...

Description: The "power factor" of AC systems or components is the cosine of the angle by which the AC current leads or lags the applied AC excitation voltage. The physics of inductance and capacitance behavior ...

Description: Signal conditioning modules, SCMs, used for measuring process control variables such as temperature, pressure, strain, position, speed, level, etc. are always subject to externally induced noise ...

Description: As a prerequisite to this Application Note, the reader is encouraged to examine Dataforth's Application Note AN112, Reference 2, which describes the amplitude characteristics and reviews the ...

Description: Information that varies continuously as a function of time is analog information. Computers are digital devices and, therefore, must convert analog information to a digital format in order to work ...

Description: Isolating power sources and sensor signals is the most effective method for eliminating undesirable ground loop currents and induced electrical noise. Dataforth Signal Conditioning Modules (SCMs) use ...

Description: Application Note ...

Description: For LDM485 or other RS-485 device at the extreme ends of the line: The need for termination depends on data rate, line length, cable electrical characteristics and environment, and if applicable, the ...

Description: When the SCM5B37 thermocouple modules are used to measure temperature, the measured output voltage must often be converted back to temperature. This is readily done with the SCM5B37 series because ...

Description: Use of the ground jumper arrangement on the SCMPB01 and SCMPB02 backpanels depends on the particular host analog-to-digital converter (ADC) system connected to the backpanels and SCM5B modules. This ...

Description: Read the drift specifications under the "Stability" heading on the appropriate spec sheet. Determine the overall gain of the module by dividing the output range by the input range. 1. Calculating ...

Description: Many sensors used in industry exhibit a deviation from an ideal (linear) relationship between input and output. For example, a given change in temperature does not give rise to the same change in emf ...

Description: Industrial equipment located in the "field" is exposed to electrical noise, power surges, and transient events such as static discharge or lightning strikes. One of the functions of the Dataforth line ...

Description: Cable shielding is used primarily to minimize or eliminate capacitively coupled interference from electric fields. When properly implemented, it can also be used to minimize inductive coupling from ...

Description: In today's dynamic industrial environments, electronic devices, signal and power wiring, and other electrical plant/process equipment often interact to create "noise" or electromagnetic interference ...

Description: Linear variable displacement transducers (LVDTs) provide a method of measuring displacements with very high accuracy and infinite resolution. These type of transducers utilize a precision linear ...

Description: When SCM7B37 thermocouple modules are used to measure temperature, the measured output voltage must often be converted back to temperature. This is readily done with the SCM7B37 series because Cold ...

Description: Figures 1 through 4 are the result of performing a 100-run Monte Carlo analysis on the SCM7B filter circuitry in both the frequency and time domains.* In this type of analysis, all component values ...

Description: Failure rate calculations for the SCM7B modules are derived from 1.) the MILHDBK- 217 (Reliability Prediction of Electronic Equipment), and 2.) Demonstrated Performance. The "Part Stress Analysis" ...

Description: Using the module data sheet or module top label, determine the input and output ranges of the module. Connect a precision voltage source, current source, frequency source, RTD simulator, resistance or ...