Calibration Standards and Reference Sources Specifications

Dimensional Standards



	Your choices are...
	Angle Gage Block		Gage blocks are manufactured to a precise angle for gaging angles or for checking angle gages and protractors.
	End Measuring Rod		End measuring rods or micrometer standards are fixed length setting gage or standards used for checking or calibrating micrometers or other length / thickness gages. End measuring rods consist of long, ground bars manufactured to precise tolerances, and with a central insulating handle.
	Gage Block		Gage blocks provide fixed length, thickness, or angle standards and are manufactured to specific flatness, parallelism, and dimensional standards.
	Pin / Plug Gage		Pin / plug gages are production functional gages for go / no-go assessment of hole and slot dimensions or locations compared to specified tolerances.
	Precision Gage Ball		Precision balls are precisely manufactured spherically shapes for gaging spherical cavities, tapered holes, or machine tool set up.
	Ring Gage		Ring gages are production functional gages for go / no-go assessment compared to specified tolerances of the dimensions or attributes of pins, shafts, or threaded studs.
	Square Gage Block		Square gages blocks do not have a central hole and are held together with an external gage block holder.
	Rectangular Gage Block		Rectangular gage blocks have one or more centrally located holes for mounting on holding bars.
	Wear Gage Block		Wear gage blocks are used on the ends of the gage block stack that contact the parts or variable gages being evaluated.
	Other		Other unlisted, specialized, or proprietary gage block types.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

	Tolerance Grade (Gage Block / Pin Gage)
	Your choices are...
	Grade 0.5 (Lab Master or AAA)		Federal Grade 0.5, Grade AAA, or Laboratory Master Grade products provide the highest degree of accuracy and are used in precision or master calibration gaging operations in temperature controlled metrology or standards laboratories. Grade 0.5 gage blocks under one inch in length should have length tolerances of +/- 1 microinches (1 mike or 1 millionth of an inch) and flatness and parallelism variation of not more than 1 microinches. Federal Grade 0.5 exceeds German Grade 00 as well as DIN, ISO, and BSS Grade K.
	Grade 1 (AA)		Federal Grade 1, Grade AA, or Laboratory Grade products provide a high degree of accuracy and are used in precision gage checking or setting operations in quality control or metrology laboratories. Grade 1 gage blocks under one inch in length should have length tolerances of +/- 2 microinches (2 mikes or 2 millionths of an inch) and flatness and parallelism variation of not more than 2 microinches. Federal Grade 1 exceeds German Grade 00. as well as DIN, ISO, and BSS Grade K.
	Grade 2 (A1 / A+)		Federal Grade 2 or Grade A or Inspection Grade products provide a high degree of accuracy and are used in precision gage checking or setting operations in quality control or metrology laboratories. Grade A+ block indicates a manufacturer that provides higher level or precision compared to the government Grade A standards. Grade gage blocks under one inch in length should have length tolerances of +/- 2 microinches (2 mikes or 2 millionths of an inch) and flatness and parallelism variation of not more than 2 microinches. Federal Grade 2 exceeds German, DIN, ISO, and BSS Grade 0 standards.
	Grade 3 (A)		Grade A, or Inspection Grade, products provide sufficient accuracy for use in gaging, setting and general inspection operations in production or tool room areas.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

Electrical Standards & Sources



	Your choices are...
	Capacitance / Capacitor		Capacitance standards and decades provide a highly accurate standard value of capacitance for calibration and testing.
	Inductance / Inductor		Inductance standards and decades provide a highly accurate standard value of inductance for calibration and testing.
	Resistance / Resistor		Resistance standards and decades provide a highly accurate standard value of resistance for calibration and testing.
	Voltage Reference		Voltage standards, sources and dividers provide a highly accurate value or ratio (V_out / V_in) of voltage for calibration and testing using very precise standard DC cells, power supplies, fixed resistors, and/or potentiometers.
	Current Reference		Current standards or sources provide a highly accurate value or ratio (I_out / I_in) of current for calibration and testing using very precise power supplies, fixed resistors, and/or potentiometers.
	Specialty / Other		Other specialized, unlisted or proprietary electrical standard, reference source or decade box.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

	Form / Technology
	Your choices are...
	Standard		Standards provide a highly accurate standard value of resistance, capacitance, inductance, voltage or other electrical parameter for calibration and testing. Standards usually consist of a single, fixed value component or a several components not in the same circuit. Some standards are available that are continuously variable, often incorporating a potentiometer. Standards having more than one component (e.g., several fixed value resistors) have multiple posts or a rotary switch to select different resistance values.
	Decade Box / Substituter		Decade boxes, decades or decade substituters provide highly accurate and digitally variable standard values of resistance, capacitance, inductance or combinations of these electrical parameters for calibration and testing. Decade boxes usually consist of several components (e.g., resistors) within the same circuit. The standard resistance value is selected by varying of the number resistors in the series or parallel circuit.
	Digital Potentiometer / Bridge		The device is a rheostat or potentiometer, or a rheostat or potentiometer is an integral part of the device (or integral option).
	Voltage Divider		Voltage dividers are the equivalent of digital potentiometer with a variable potentiometer (in series) for fine-tuning. Voltage dividers provide a highly accurate ratio (V_out / V_in) of voltage and current for calibration and testing using a very accurate potentiometer in combination with a series of fixed resistors. Kelvin-Varley voltage dividers use a bridge circuit with two standard value resistors. The ratio of the resistance value determines the voltage or current ratio that is provided.
	RTD Simulator		RTD simulators provide an output to simulate an RTD resistance value for calibration and testing of resistance temperature detectors.
	Thermocouple Simulator		Thermocouple simulators output a precise voltage to simulate the millivolt potential of K, J, R, or other thermocouple junctions.
	Other		Other unlisted forms or categories.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

Inspection & NDT Standards



	Your choices are...
	Flaw Standard / Test Panel		Any standards with artificial flaws used to verify readings and calibrate flaw detectors. Some examples of flaw standards are QQIs (Quantitative Quality Indicators) used in magnetic particle inspection or FPI test panels.
	Conductivity Standard		Metal or material sample of known and uniform conductivity, composition and processing used to verify readings and calibrate conductivity testers.
	Densitometer Standard		Black & white or color images with known patterns and area density variations usually made a specific standard.
	Hardness Standard		Blocks of metal or material of known hardness and heat treatment usually calibrated to ASTM standards that are used to verify hardness test readings.
	Radiographic Film Standard		X-ray reference radiographs, reflectance standards, contrast shims.
	Thickness Calibration Block		Blocks or stepped blocks of a known material and thickness used for calibration of thickness or flaw detection instruments such as ultrasonic or eddy current units.
	Other		Other NDT standards and references not listed elsewhere.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

Signal Standards & Sources


	Signal / Waveform
	Your choices are...
	Continuous Wave (CW)		Continuous wave (CW) generators produce sine waves. Sine wave frequency and amplitude can be set in most CW sources.
	Function		Function generators create square waves by applying a bipolar sine wave to a comparator’s input.
	Noise		Noise generators and noise sources produce random noise outputs for testing RF equipment, integration with RF and microwave devices, and use as calibration standards. Applications for noise generators and noise sources include: Built-in testing for RF receivers Eb / No vs. BER testing (modems or digital receivers) Encryption Dithering circuits Jamming or jamming simulation Baseband signal simulation Calibration sources or standards
	Pulse		Pulses are current or voltage that changes abruptly from one value to another and back to the original value in a finite length of time.
	Signal		Signal generators output signals or sine waves that carry information. There are many ways to add information to sine waves. Basic signal generators include frequency, amplitude and phase modulation capabilities. Advanced signal generators offer pulse and IQ modulation capabilities.
	Sweep		Swept sources are able to automatically vary the output frequency or amplitude of a sine wave over a range of frequencies or amplitudes in a controlled manner.
	Other		Other unlisted generator type.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

Features


	Features
	Your choices are...
	System Component		Standard, source or decade suitable for use as a precision component in a larger system or product.
	Laboratory / Transfer		Transfer grade standards are used to compare or transfer the accuracies from NIST or national lab certified standards to working standards or inspection
	NIST / National Lab Traceable		Standard calibration that can be traced to the National Institute of Technology Standards (NIST) or other National Lab. The standard has been compared to a master standard that has been checked against a NIST standard.
	Reference / Working		Reference or working standards are compared or verified by transfer or laboratory standards and then used for calibration, testing and inspection of other components and instruments.
	Other		Other unlisted, proprietary or specialized feature.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

What do you want to do?
		Show All Calibration Standards and Reference Sources Companies
		Learn more about Calibration Standards and Reference Sources
		Search By Specification