GO AND PLAY (serv.man3) - Harman Kardon Audio EMC - CB Certificate (repair manual). Page 74

Nemko USA, Inc. 

 

 

 
Nemko USA, Inc. operates a comprehensive Periodic Calibration Program in order to ensure the validity of 
all test data.  Nemko USA’s Periodic Calibration Program is fully compliant to the requirements of 
NVLAP Policy Guide PG-1-1988, ANSI/NCSL Z540-1 (1994), ISO 10012-1 (1993-05-01), ISO Standard 
17025, ISO-9000 and EN 45001.  Nemko USA, Inc.’s calibrations program therefore meets or exceed the 
US national commercial and military requirements [N.B. ANSI/NCSL Z540-1 (1994) replaces MIL-STD-
45662A]. 
 
Specifically, all of Nemko USA’s primary reference standard devices (e.g. vector voltmeters, multimeters, 
attenuators and terminations, RF power meters and their detector heads, oscilloscope mainframes and plug-
ins, spectrum analyzers, RF preselectors, quasi-peak adapters, interference analyzers, impulse generators, 
signal generators and pulse/function generators, field-strength meters and their detector heads, etc.) and 
certain secondary standard devices (e.g. RF Preamplifiers used in CISPR 11/22 and FCC Part 15/18 tests) 
are periodically recalibrated by: 
 

o  A Nemko USA-approved  independent (third party) metrology laboratory that uses NIST-

traceable standards and that is ISO Guide 25-accredited as a calibration laboratories by 
NIST; or, 

o  A Nemko USA-approved  independent (third party) metrology laboratory that uses NIST-

traceable standards and that is ISO Guide 25-accredited as a calibration laboratory by 
another accreditation body (such as A2LA) that is mutually recognized by NIST; or, 

o  A manufacturer of Measurement and Test Equipment (M&TE), if the manufacturer uses 

NIST-traceable standards and is ISO Guide 25-accredited as calibration laboratory either by 
NIST or by another accreditation body (such as A2LA) that is mutually recognized by NIST; 
or 

o  A manufacturer of M&TE (or by a Nemko USA-approved independent third party metrology 

laboratory) that is not ISO Guide 25-accredited.  (In these cases, Nemko USA conducts an 
annual audit of the manufacturer or metrology laboratory for the purposes of proving 
traceabilty to NIST, ensuring that adequate and repeatable calibration procedures are being 
applied, and verifying conformity with the other requirements of ISO Guide 25). 

 
In all cases, the entity performing the Calibration is required to furnish Nemko USA with a calibration test 
report and/or certificate of calibration, and a “calibration sticker” on each item of M&TE that is 
successfully calibrated. 
 
Calibration intervals are normally one year, except when the manufacture advises a shorter interval or if 
US Government directives or client requirements demand a shorter interval.  Items of 
instrumentation/related equipment which fail during routine use, or which suffer visible mechanical 
damage (during use or while in transit), are sidelined pending repair and recalibration.  (Repairs are carried 
out either in-house [if minor] or by a Nemko USA-approved independent [third party] metrology 
laboratory, or by the manufacturer of the item of M&TE). 
 
Each antenna used for CISPR 11 and CISPR 22 and FCC Part 15 and Part 18 radiated emissions testing 
(and for testing to the equivalent European Norms) is calibrated annually by either a NIST (or NVLAP) 
ISO Standard 17025-Accredited third-party Antenna Calibration Laboratory or by the antenna’s OEM if 
the OEM is NIST or NVLAP ISO Standard 17025-accredited as an antenna calibration laboratory.  The 
antenna calibrations are performed using the methods specified in Annex G.5 of CISPR 16: 2003 or ANSI 
C63.4: 2003, including the “Three-Antenna Method”.  Certain other kinds of antennas (e.g. magnetic-
shielded loop antennas) are calibrated annually by either a NIST (or NVLAP) ISO Standard 17025-