• 17025

  
  NZS/ISO/IEC 17025 covers the "General Requirements for the Competence of Testing and Calibration Laboratories". NZS/ISO/IEC 17025 assures the customer that: procedures used, and results issued, by a laboratory are technically valid; an effective quality system is in use; and staff are competent.
  
  

• AC

  
  Alternating Current
  An electric current that reverses its direction at regularly recurring intervals.
  
  

• Accuracy

  
  The closeness of an indication or reading of equipment to the actual value of the quantity being measured. A typical accuracy statement may combine a % of reading, % of range, n * digits, etc.
  
  

• Ambient Temperature

  
  The average or mean temperature of the surrounding air which comes in contact with the equipment and instruments under test.
  
  

• Ampere

  
  The unit of measure (A) used to define the rate of flow of electricity (current) in a circuit (one coulomb (6.25 x 108 electronics) per second). Also know as an Amp.
  
  

• ANSI

  
  American National Standards Institute
  Coordinates the development and use of voluntary consensus standards in the United States and represents the needs and views of U.S. stakeholders in standardization forums around the globe.
  
  

• APLAC

  
  Asia Pacific Laboratory Accreditation Cooperation
  APLAC groups accreditation bodies in the Asia Pacific region responsible for accrediting calibration, testing and inspection facilities.
  
  

• AS/NZS 3760

  
  In-service Safety Inspection and Testing of Electrical Equipment is a joint Australia and New Zealand Standard. This standard specifies in-service safety inspection and testing protocols and criteria that satisfy the OSH obligations of employers and employees, and provides a cost effective approach to safety without jepoardising the safety of personnel or involving excessive equipment downtime.
  
  

• Bandwidth

  
  The frequency range between frequency points at which the signal is attenuated by 3 dB.
  
  

• BMC

  
  Best Measurement Capabilities
  The highest level of calibration or measurement accuracy available to a customer, provided by the calibration laboratory.
  
  

• Calibration

  
  A set of operations, under specified environmental conditions, that establish the relationship between measured values of the equipment under test and the corresponding values of the reference standards or materials.
  
  

• Conductance

  
  The measure of the ability of a material or solution to carry an electrical current. Unit of measure is the Siemens (S).
  
  

• Confidence Interval

  
  The range of values that encompases the standard uncertainty multiplied by the coverage factor. In the formula below, ± ks represents the confidence interval.
  
  value = m ± ks
  
  value = value of the measurement
  m = measurement (or mean of measurements)
  k = coverage factor
  s = standard uncertainty
  
  

• Coverage Factor

  
  A numerical factor k is used as a multiplier of the combined standard uncertainty in order to obtain an expanded uncertainty. In general, the value of the coverage factor k is chosen on the basis of the desired level of confidence to be associated with a measurement. With a normal distribution, k=2 giving a level of confidence of approximately 95 % that the measured value m is within ± ks of the value.
  
  value = m ± ks
  
  value = value of the measurement
  m = measurement (or mean of measurements)
  k = coverage factor
  s = standard uncertainty
  
  

• Current

  
  The rate of flow of electricity. The unit of measure is the ampere (A).
  
  

• DC

  
  Direct Current
  An electric current flowing in one direction only and constant in value.
  
  

• Decibel

  
  The decibel (dB) is a logarithmic unit used to describe a ratio of power, voltage, etc.
  
  

• Digit

  
  A measure of the display span of a meter. By convention, a full digit can assume any value from 0 through 9, a 1⁄2-digit will display a 1 and overload at 2, a 3⁄4-digit will display digits up to 3 and overload at 4, etc. For example, a meter with a display span of ±399 counts is said to be a "2 and 3⁄4 digit" meter.
  
  

• DUT

  
  Device Under Test
  The item of equipment being calibrated. Also know as "UUT" (Unit Under Test).
  
  

• ESD

  
  ElectroStatic Discharge
  The rapid, spontaneous transfer of electrostatic charge induced by a high electrostatic field.
  Electrostatic Sensitive Device
  Any component which is prone to damage by static electricity charges which build up on people, tools, packaging, etc.
  
  

• Estimated Uncertainty

  
  See "Expanded Uncertainty".
  
  

• Expanded Uncertainty

  
  The quantity defining an interval about the measurement m, that may be expected to encompass a large percentage of the distribution of values (typically 95% or greater) that could reasonably be attributed to the measured value. In the formula below, ks represents the expanded uncertainty.  
  
  value = m ± ks
  
  value = value of the measurement
  m = measurement (or mean of measurements)
  k = coverage factor
  s = standard uncertainty
  
  

• Frequency

  
  The number of cycles over a specified time period over which an event occurs. Unit of measure is the Hertz (Hz).
  
  

• Hertz

  
  Units (Hz) in which frequency is expressed.
  
  

• IANZ

  
  International Accreditation New Zealand
  The New Zealand national authority for the accreditation of testing laboratories, radiology services, and inspection services. promote the development and maintenance of good practices in testing and inspection, maintaining a registration scheme for those organisations accredited.
  
  

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