Test Equipment and Instrument Repair Services Specifications

Acoustic / Vibration Equipment


	Acoustic / Vibration Equipment:
	Your choices are...
	Accelerometer / Vibration Sensor		Accelerometers are sensors and instruments for measuring, displaying and analyzing acceleration and vibration. They can be used on a stand-alone basis, or in conjunction with a data acquisition system. Accelerometers are available in many forms. They can be raw sensing elements, packaged transducers, or as a sensor system or instrument, incorporating features such as totalizing, local or remote display and data recording. Accelerometers can have from one axis to three axes of measurement, the multiple axes typically being orthogonal to each other. These devices work on many operating principles. The most common types of accelerometers are piezoelectric, capacitance, null-balance, strain gage, resonance, piezoresistive and magnetic induction. Vibration sensors are sensors for measuring, displaying and analyzing linear velocity, displacement and proximity, or else acceleration. They can be used on a stand-alone basis, or in conjunction with a data acquisition system. Vibration sensors are available in many forms. They can be raw sensing elements, packaged transducers, or as a sensor system or instrument, incorporating features such as totalizing, local or remote display and data recording.
	Acoustic Sensors / Microphones		Measurement microphones are most commonly condenser microphones in which sound pressure actuates a diaphragm that is one plate of a capacitor. The relative motion of the capacitor plates causes a change in capacitance and the resulting voltage is measured and converted into a reading such as sound pressure level (SPL). Measurement microphones are described by type of sound field. Pressure field measurement microphones are used to measure sound pressure that has the same magnitude and phase throughout the field. Free field microphones are used to measure a plane wave that is propagating freely in one defined direction. Diffuse field measurement microphones, also known as random incidence microphones, measure sound waves from all directions.
	Acoustic / Ultrasonic Transducers		Ultrasonic transducers send and receive waves for many types of sensing. Distance, proximity, level, nondestructive evaluation, web break detection, counting, and security applications are some examples. They typically operate at their resonant frequency with various construction options, beam patterns, and power levels. Underwater acoustic transducers can contain both transmitters and receivers, or they can be solely transmitters used in conjunction with a hydrophone. They sense reflected sound and use distance and directional data for communication, mapping and navigation. Underwater acoustic transducers have an operational range, but are usually designed to operate at their resonance frequency to maximize output power. They are most typically single frequency transmitters, but they may contain multiple transmitters and receivers for different frequencies.
	Hydrophones		Hydrophones are underwater acoustic sensors, which most commonly use piezoelectric technology. They can be used singly or in arrays that can contain dozens or hundreds of individual units. They are used in marine geological and biological research, undersea mapping and navigation, and various commercial and military applications.
	Impact Hammers		Impact hammers are used in structural and modal analysis to determine component or system response to impacts of varying amplitude and duration. It is simply a hammer with a force transducer in its head is paired with an accelerometer on the component being tested to compare impact and response. Impact hammers are used for modal and structural behavior analysis for all types of components and systems. The most critical specifications for impact hammers are the force and pulse duration, both rated by minimums and maximums. Force is measured in pounds, kg, N and other similar units. The pulse duration, a measurement of the time the hammer is imparting a force on the object being tested, is a very short span of time, often measured in milliseconds. Another important specification is the upper limit of the frequency range. This is the highest frequency for which the response will be tested, and can be altered by using accessory tips, if available.
	Shakers		Shakers and vibration and shock testing equipment are force generators or transducers that provide a vibration, shock or modal excitation source for testing and analysis. Shakers are used to determine product or component performance under vibration or shock loads, detect flaws through modal analysis, verify product designs, measure structural fatigue of a system or material or simulate the shock or vibration conditions found in aerospace, transportation or other areas.
	Shaker Controllers		Shaker controllers are units designed to control shaker tables. The simplest types of shaker controllers are controlled manually and depend on the operator to read and evaluate the feedback signal and adjust the amplifier signal input voltage accordingly. This type of system can be as simple as a sine wave signal generator and an accelerometer monitored by a voltmeter. It is left to the operator to manually make the necessary gain compensation for changes in frequency or desired level specifications.
	Sound Level Meters / Dosimeters		Sound level meters and noise dosimeters are used in many kinds of sound and noise analysis including industrial safety, traffic and transportation noise quantification, and scientific noise measurement. They are frequently hand-held and battery-powered. Sound level meters measure real-time sound and can have functions such as signal analysis, noise dose measurement, and different time and frequency weighting.
	Vibration / Noise Analyzer (FFT)		Instruments for measuring and analyzing vibration or acceleration, using accelerometers or displacement sensors including systems for vibration testing, and modal analysis such as the instrumentation to acquire data and/or analyze results. Vibration instruments are used for measuring, displaying and analyzing vibration. Typically these instruments comprise a transducer, data acquisition and either a local display or some sort of output to a computer or another instrument. Vibration instruments can have many features, including incorporating features such as totalizing, local or remote display and data recording. They may be stationary or else portable field-type instruments.
	Position Sensor / Instrument		Position sensors encompasses a wide range of sensors, switches and technologies that are used to determine the placement, speed or movement, direction, and location of a given target. Linear position devices include cable extension, capacitive, eddy current, fiber optic, Hall effect, inductive, magneto resistive, optical triangulation, photoelectric, position displacement, ultrasonic, and variable resistance technology sensors. Other instruments include laser micrometers, linear encoders, linear potentiometers, and LVDTs. Rotary position sensors include rotary encoders and angular position sensors. Orientation position sensors include encoders, inertial gyros, and inclinometers.
	Speed / Velocity Instrument		Instruments and controllers that measure monitor or adjust velocity or speed in shafts, moving webs and other components.
	Specialty / Other		Other unlisted, specialized or proprietary acoustic or vibration instrument or test equipment.
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Electrical / Electronic Test Equipment


	Electrical / Electronic Test:
	Your choices are...
	Analyzers		Any type of analyzer such as signal or function analyzers.
	Automated Test Equipment (ATE)		Automated Test Equipment (ATE) is computer controlled test and measurement equipment that is arranged in such a way as to be able to test a unit with minimal human interaction. The advantage of this kind of test is that each test is repeatable and cost efficient in high volume. The chief disadvantage is the high cost of programming and setup.
	Data Acquisition / Signal Conditioning		Data acquisition is the digitizing and processing of multiple sensor or signal inputs for the purpose of monitoring, analyzing and/or controlling systems and processes. Signal conditioning includes the amplification, filtering, converting, and other processes required to make sensor output suitable for rereading by computer boards. Data acquisition systems and instruments collect, digitize and process multiple sensor or signal inputs for the purpose of monitoring, analyzing and/or controlling systems and processes. They are configured in a wide variety of instrumentation and modular systems.
	Data / Chart Recorders		Data loggers and data recorders acquire digital data from sensors and other signals. They are primarily used to store data (for subsequent download to a host PC), but may also include real-time features including monitors and alarms. Chart recorders and strip charts are data acquisition tools used to generate a plot, graph or other visualization of data versus time. Common applications include temperature and humidity measurements, chromatography, spectroscopy graphs, and plots of the output of a wide range of other lab and test equipment.
	Multimeter / Electrical Meters		Any electrical quantity measuring meter or multimeter, either analog or digital.
	RF / Microwave Instruments		Any instrument involved in RF, microwave or wireless communication including transmitters, receivers, antennas, etc.
	Generators (Function, Pulse, etc.)		Any digital or analog type generator such as function generators, signal generators, pulse generators etc.
	Oscilloscopes / Scopes		Any digital scope including oscilloscopes or PC based scopes for capturing and analyzing electronic signals.
	Power Supplies / Amplifiers		Any AC or DC power supply, power amplifier or power conditioner.
	Specialty / Other		Other unlisted, specialized or proprietary electrical or electronic instrument or test equipment.
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Laboratory Equipment / Instruments


	Process / Laboratory Instruments:
	Your choices are...
	Conductivity / Dissolved Solids Meters		Conductivity meters, dissolved solids meters, and resistivity meters are used to measure liquid materials to determine the qualities of particles that are dissolved within them.
	Calorimeters / Thermal Analyzers		Calorimeters are instruments that measure heat flux. These heat fluxes may be by the measurement of specific heat capacity, measurement of the heat of reaction and measurement of the heat produced by living organisms.
	Circulators and Baths		Refrigerated and heated circulators and baths are designed for controlling temperature in external instrumentation and for immersion applications within the biotechnology, chemical, laser, and medical industries. They are used for warming or cooling liquid samples to sustain or impede reactions. In addition to heating and cooling samples, some varieties are available with built-in shakers to agitate samples. Proper circulator and bath design includes a number of physical and mechanical features, and the electronic temperature controls. Conventional circulator and bath designs use separate heating and cooling devices immersed in the bath liquid, although other systemic styles are available. To maintain an even temperature, the bath fluid must be stirred vigorously. However this must be accomplished without the formation of air bubbles or vortices in the fluid, which could interrupt the temperature transmission, or negatively impact the samples. The temperature control system, including the temperature sensor or thermistor, must be responsive enough to maintain uniform temperatures for long periods.
	Chromatography Instruments		Instruments used to separate chemical mixtures, carried by liquids or gases, into components as a result of differential distribution of the solutes as they flow around or over a stationary liquid or solid phase. High Performance Liquid Chromatography (HPLC) is one mode of chromatography. Chromatographic processes can be defined as separation techniques involving mass-transfer between stationary and mobile phases. Gas chromatography is a technique used to separate volatile organic compounds. Gas chromatography columns (GC columns) are of two types: packed and capillary. Solutes to be measured travel through the column at a rate primarily determined by their Gas chromatography detectors (GC detectors) identify solutes as they exit the chromatographic column. A chromatogram is generated plotting the signal versus time. physical properties, and the temperature and composition of the column.
	Density Instruments		Density and specific gravity instruments are meters used to determine the density and specific gravity of a mixture that may be solid, gas, or liquid. The density range (mass per volume), accuracy, and response time characterize most of these instruments. Simultaneous measurements and user interfaces are also important in choosing the proper density and specific gravity instruments.
	Dissolved Gas Meters		Dissolved gas sensors are used to measure the amount of oxygen, carbon dioxide or other gases dissolved in a unit volume of water. In water quality applications, such as aquaculture (including fish farming) and wastewater treatment, the amount of dissolved oxygen (DO) must be kept high.
	Dust / Opacity Instruments		Opacity sensors, dust sensors and visibility sensors measure the amount of light transmitted through a sample.
	Environmental Test Chambers		Environmental test chambers provide a temperature, humidity, or atmosphere controlled environment for testing for testing or evaluating products or materials. Environmental test chambers are used to ensure the reliability of industrial products, especially electronic items through tests such as prolonged thermal cycling and prolonged exposure to humidity.
	Flow Instruments		Any instruments relating to process flow such as flow meters and sensors, gauges, totalizers or valve position indicators.
	Force, Weight, or Torque Instruments		Any instruments relating to force, weight or mass measurement including strain gauges, load cells, scales or torque monitors.
	Freezers / Refrigerators		Laboratory refrigerators and laboratory freezers are used to cool or freeze samples for preservation. Cryogenic freezers will cool to below negative 133, the temperature at which metabolic activity stops.
	Furnaces / Ovens		Laboratory ovens and laboratory furnaces are used in a variety of thermal processing applications including general lab work, component and stability testing, core hardening, drying glassware, and sterilizing.
	Gas / Air Instruments		Gas instruments and air instruments detect, monitor or analyze gases present in an environment. Detectors sense situations outside normal operating parameters and are set to alarm when these conditions are violated. Monitors are also set up to alarm, but their role is to determine which gases are in the stream being measured, and in what quantity they are present. Analyzers provide a breakdown of what is found, log the information, and can download it to a computer where further analysis and record keeping can be performed. Gas instruments and air instruments can sense sometimes just one gas or else can sense multiple types of gases with one instrument.
	Humidity Generators		Humidity generators continuously supply an accurately known humidity value for instrument calibration, evaluation, and verification, as well as for environmental testing.
	Humidity / Moisture Instruments		Any instruments relating to humidity or moisture monitoring including absolute or relative humidity, moisture content or dew point measuring devices.
	Ion Specific Meters		An ion meter is a millivolt meter that interfaces with the ion selective electrode (ISE). The meter takes the potential generated by the electrode and converts it into units of concentration.
	Leak Testing Equipment		Leak testing equipment is a type of nondestructive testing equipment used to measure the escape of liquids, vacuum or gases from sealed components or systems. Some configurations require a separate leak detector or sensor as an input. They are often equipped with various other components such as pumps, calibrators, gauges and cases.
	Level Sensors / Instruments		Level sensors are used to detect liquid or powder levels, or interfaces between liquids. These level measurements can be either continuous or point values represented with various output options. Continuous level sensors are devices that measure level within a specified range and give output of a continuous reading of level. Point level sensors devices mark a specific level, generally used as high alarm or switch. Multiple point sensors can be integrated together to give a stepped version of continuous level. These level sensors can be either plain sensors with some sort of electrical output or else can be more sophisticated instruments that have displays and sometimes computer output options.
	Oil in Water Monitors		Oil in water instruments monitor for the presence of hydrocarbons in water
	pH / ORP Meters		pH and oxidation reduction potential (ORP) instruments are used to measure or monitor pH and oxidation-reduction potential. pH is the negative logarithm of the hydrogen ion activity in solution. The pH value of a substance is directly related to the ratio of the hydrogen ion [H+] and the hydroxyl ion [OH-] concentrations. It is one of the most common laboratory measurements because many chemical processes are dependent on pH. Oxidation-reduction is a type of chemical reaction where electrons are transferred from one substance to another. The oxidized species loses electrons and the reduced species gains electrons. Both species must be present for the reaction to occur
	Pressure Instruments		Any instruments relating to pressure measurement such as pressure sensors or gauges, meters or transducers.
	Process Controllers / Control Systems		General purpose process controllers monitor various parameters and initiate controller functions based on measurements of temperature, pressure, level or other process parameters.
	Radiation Detectors		Devices used for medical diagnoses, radioactive dating measurements, measurement of background radiation, activity level and radiation dose.
	Spectrometers		Spectrometers and photometers are analytical instruments in which the characteristic emission or absorption of radiation by a material or substance is measured to determine elemental composition or constituents. Specific spectrometer types include UV/Visible, Raman, infrared, x-ray fluorescence (XRF), mass spectrometers, nuclear magnetic resonance (NMR) and other specialized units.
	Temperature Instruments		Any instruments relating to process temperature measurement including thermocouple, RTD or thermistor type devices.
	Titrators		Titrators or titration instruments are used in the titration analysis. Titration is an analytical technique that allows the quantitative determination of a specific substance dissolved in a sample. It is based on a complete chemical reaction between the specific substance, the analyte, and a reagent or titrant of known concentration that is added to the sample.
	TOC Analyzers		Total organic carbon (TOC) analyzers measure the amount of total organic carbon present in a liquid sample.
	Turbidity Analyzers		Turbidity instruments measure the average volume of light scattering over a defined angular range. Both particle size and concentration of suspended solids as well as dissolved solids can affect the reading.
	Vacuum Instruments		Instrument, sensor or device for measuring vacuum or sub-atmospheric pressures.
	Vacuum Pumps / Generators		Vacuum pumps and vacuum generators provide sub-atmospheric pressure for a variety of industrial and scientific applications. Different technologies of pumps are used for industrial gripping and chucking, laboratory degassing, and purification in the fields of chemical and semiconductor processing. Vacuum handling systems are used in diverse industries such as pharmaceutical, food processing, and agricultural applications.
	Viscometers / Rheometers		Rheometers and viscometers are used to define the viscous properties of fluids at ambient or defined temperatures and characterize liquids according to their viscous properties and elastic responses.
	Water Quality Instruments		Water quality testing instruments and sensors are designed to read water for a variety of chemical and biological agents as well as clarity, rate of movement, etc. Monitored water quality factors may include pH, dissolved carbon dioxide, dissolved oxygen, biological oxygen demand (BOD), conductivity or dissolved solids, suspended solids, turbidity, presence of oil in water and oil/water interface levels. Water quality testing instruments can have control functionality such as set limits, regulator and P/PI/PID control functions. They can also have simple control relay outputs.
	Weather Instruments / Solar Radiometers		Weather instruments are specifically designed to measure one or multiple components of weather; including wind speed and direction, rain/snow fall, solar radiation, temperature, pressure and humidity.
	Other		Other unlisted, specialized or proprietary process or laboratory instrument. or test equipment.
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Inspection / NDT


	Inspection / NDT:
	Your choices are...
	Coordinate Measuring Machines (CMM)		Coordinate Measuring Machines (CMMs) are mechanical systems designed to move a measuring probe to determine coordinates of points on a work piece surface. CMMs are comprised of four main components: the machine itself, the measuring probe, the control or computing system, and the measuring software. Machines are available in a wide range of sizes and designs with a variety of different probe technologies.
	Dimensional Gages / Instruments		Dimensional gages and instruments provide quantitative measurements of a product's or component's attributes such as wall thickness, depth, height, length, I.D., O.D., taper or bore. Dimensional gages and instruments encompass: Air or pneumatic gages Bore and ID gages Calipers Digital or electronic gages Custom or OEM gages Depth gages Masters, setting gages and other dimensional standards (Gage blocks, end measuring rods, gaging balls) Gage head or probes Gage sets or measuring tool kits Gaging systems or stations Go / no-go, attribute or functional gages (plugs, rings, snaps, flush-pins) Height gages Indicators and comparators Laser micrometers Mechanical micrometers Micrometer heads Thickness gages Thread or serration gages Specialty and other gages - designed specifically for gear, spring, runout, impeller, form or other special functions
	Eddy Current Instruments		Eddy current instruments are nondestructive devices that induce detectable eddy currents in conductive materials and analyze the response for flaw detection, thickness, weld inspection, conductivity, alloy sorting, heat treat verification and other applications.
	Hardness Testers		Hardness is a characteristic of a material, not a fundamental physical property. It is defined as the resistance to indentation, and it is determined by measuring the permanent depth or projected area of the indentation. More simply put, when using a fixed force (load) and a given indenter, the smaller the indentation, the harder the material.
	Materials Testing Equipment		Materials or mechanical testing equipment includes adhesion or bond testers, compressive testers, creep and stress relaxation testers, drop or shock testers, ductility testers, fatigue testers, impact toughness testers, shear testers, tensile testers, and vibration testers.
	Magnetic Particle (MPI) Equipment		Instruments and test equipment required to preform magnetic particle inspection (MPI) such as demagnetizers, magnetometers, magnetizer power packs and coil or yoke magnetizers.
	Microscopes / Optical Instruments		Microscopes are instruments that are capable of producing a magnified image of a small object. They are used in many applications in the scientific and industrial arenas. Common applications include manufacturing inspection, high-technology quality control in areas such as semiconductor processing, medical imaging, cell research, and metallurgical analysis.
	Probes / Styli		Styli, probes and cantilevers are slender rod-shaped stems & contact tips or points used to probe surfaces in conjunction with profilometers, SPMs, CMMs, gages and dimensional scanners.
	Ultrasonic Instruments		Ultrasonic instruments (UT) are devices that use ultrasonic signals to inspect materials and components. UT inspection techniques can be used, for instance, to detect surface and subsurface flaws or to measure thickness. Beams of high frequency acoustic energy are introduced into the material and subsequently retrieved. Distance calculations are based on the speed of sound through the material being evaluated. The most widely used of all UT techniques is the pulse-echo technique. Flaws are detected and sizes estimated by comparing the amplitude of a reflected echo from an interface (flaw or back surface) with that of a reference interface of known size.
	Video / Imaging Equipment		Equipment and components for the capture, processing, display and storage of video signals in analog or digital format.
	X-ray Instruments / Diffractometers		X-ray instruments and x-ray systems use penetrating X-rays or gamma radiation to capture images of the internal structure of a part or finished product. The density and composition of the internal features will alter the intensity or density of these features in the X-ray image. X-ray diffractometers or diffraction instruments are used to measure crystal structure, grain size, texture and/or residual stress of materials and compounds through interaction of the X-ray beam with a sample. The wavelengths of X-Rays are of the same order of magnitude as the distances between atoms or ions in a molecule or crystal (Å, 10-10 m). A crystal diffracts an X-Ray beam passing through it to produce beams at specific angles depending on the X-Ray wavelength, the crystal orientation, and the structure of the crystal.
	Specialty / Other		Other unlisted, specialized or proprietary inspection instruments or test equipment.
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Specialty Instruments / Test Equipment


	Specialty Instruments / Test Equipment:
	Your choices are...
	Avionics / Navigational Instruments		Specialized instruments or test equipment for aircraft such as internal inflight instrument or avionics as well as diagnostic test equipment.
	Calibration Instrument		Calibration instruments use either electrical signals or actual physical quantities to calibrate sensors and meters. They can be used as a precise meter for sensors or simulate sensor output to another device.
	Displays / Panel Meters		Any type of equipment used to present information in various formats including, displays, digital readouts, indicator lights or panel meters.
	Light Instruments (UV Meters, Fiber Optic Testers)		Any fiber optic or lightwave instrument including multiplexers, analyzers, isolators etc.
	Industrial Computers		Industrial computers are intended for use on factory floors or in other harsh environments. Unlike office computers, these systems are designed to withstand shock, vibration, humidity, EMI, RFI, dust, mist, and splash. Industrial computers are available in many configurations with a variety of CPUs, displays, and I/O interfaces.
	Marine Instruments		Specialized instruments or test equipment for ship or boats such as onboard instruments for use underway as well as diagnostic test equipment.
	Medical / Biotech Instruments		Specialized instruments or test equipment used in hospitals, laboratories or doctors' offices for diagnostics, treatment or research.
	Surveying / Geophysical Instruments		Surveying instruments are used for accurate measurement of features, orientation and absolute positioning of large scale objects in engineering, construction, mapping, industry, defense and other applications.
	Vehicular / Automotive Instruments		Specialized instruments or test equipment for automobiles, trucks, buses, trains or off-road vehicles such as onboard instruments for use during driving as well as diagnostic test equipment.
	Other Specialty Instruments		Any other instrument type not listed.
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Quality Requirements


	Certifications / Quality Requirements:
	Your choices are...
	ISO / IEC 17025		ISO 17025 addresses the proficiency of the organization to perform the testing and calibration activities. It is a standard geared towards technical qualification and deals heavily with measurement uncertainties. This is layered on top of an ISO 9000 certification, which is a standard, used for total company quality system. The 17025 standard requires that all functions within the scope of a given instrument must be tested and calibrated. Example: A Digital Multimeter would require a lab to have a scope that contained ALL of the functions that the meter can measure (AC volts, DC volts, Freq., Resistance, AC current, DC current, etc.) Only service providers that list all functions within the necessary scope can provide 17025 calibration for a given instrument. Note: 17025 replaced ISO Guide 25.
	ANSI / NCSL Z540-1		Formerly MIL-STD 45662A, American National Standard ANSI / NCSL Z540-1 is a requirements document titled "Calibration Laboratories and Measuring and Test Equipment - General Requirements." This is a standard that is used primarily by government community. It is very close to the 17025 standard.
	A2LA		A2LA is the American Association for Laboratory Accreditation. A2LA accreditation is defined as formal recognition of an organization's technical competency to perform specific tests, types of tests, or calibrations. The general requirements for laboratory accreditation are contained in ISO / IEC 17025. This standard contains quality system requirements and technical requirements that the laboratories must meet. Laboratory accreditation requirements, however, go beyond just ISO / IEC 17025.
	QS 9000		Set of standards based on ISO 9001 with particular application to the automotive industry; standards are defined and maintained by major automotive manufacturers. Standards concern part fabrication and quality in areas such as materials, heat treatment, finishing, and production processes.
	ISO 9001		In 1987, the International Organization for Standardization (ISO) 9000 standards were developed to ensure that companies' products and services have consistent, documented approaches that meet the European community's quality requirements. ISO 9001 sets out the requirements for an organization whose business processes range all the way from design and development, to production, installation and servicing.
	ISO 9002		In 1987, the International Organization for Standardization (ISO) 9000 standards were developed to ensure that companies' products and services have consistent, documented approaches that meet the European community's quality requirements. ISO 9002 is for an organization, which does not carry out design and development. It does not include the design control requirements of ISO 9001 - otherwise, its requirements are identical.
	MIL-SPEC / STD		Company is certified or experienced in provided tools and/or coatings that comply with military specifications or standards.
	NIST		Calibrations are traceable to National Institute of Standards and Technology.
	NVLAP		The National Voluntary Laboratory Accreditation Program (NVLAP) provides third-party accreditation to testing and calibration laboratories.
	Other		Any unlisted quality requirement.
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