Egokitze-tolerantzia produktuaren tamaina onartzen da erabilitako fabrikazioan. Adibidez, φ20H7 zulo produktuaren tolerantzia [+ 0.021_0] da, hau da, zuloaren gehieneko eta gutxieneko tamaina onargarria .20.021 eta φ20 da, hurrenez hurren.

GO eta NO GO muga entxufe neurgailu pare bat gutxieneko eta gehieneko tamainako zuloa ikuskatzeko erabiltzen dira, hurrenez hurren. Tapoi neurgailu bakoitzak fabrikazio tolerantziak ditu. Adibidez, fabrikazio-tolerantzia GO entxufearen neurgailua .20.0 + 0.001 / + 0.005 da, eta NO GO entxufe neurgailua φ20.021 ± 0.002 da.

Kalibrazio ziurtagiria normalean neurtzeko eta probatzeko ekipoen gaitasuna eta errendimendua egiaztatzen duen dokumentua da, neurketa estandar trazagarriekin alderatuta.

Kalibrazio ziurtagiriarekin batera, trazabilitate ziurtagiria, trazabilitate sistemaren diagrama, epaiaren emaitzari buruzko txostena eta kalibraziorako erabilitako tresnen kalibrazio eta ikuskapen ziurtagiriak ere ematen ditugu. Ziurtagiriak emateko tasaren erantzule zara.

Accurate gauge with air tooling depends on the ability of the tool to produce consistent measurements, regardless of the tool's position within the workpiece. This means that the airflow and characteristics of the two jets must be "balanced". Since the air amplifier reacts to changes in this airflow, any position of the tool in the workpiece which reduces the airflow from one jet, must create a proportionate increase in airflow from an opposing jet. Jet diameters and "nozzle drops" must be identical, and on a common centerline with the outer diameter of the plug itself.

Any deviation in these two conditions of "balance" and "centrality" will cause indicator fluctuations commonly referred to as "total shake error". The following test procedures are recommended as the best methods of determining when an air tool should be removed from service. (Note these are only generalized recommendations and the results from each of these tests should be considered against the tolerance being measured with any specific air tool).

Accurate gauge with air tooling depends on the ability of the tool to produce consistent measurements, regardless of the tool's position within the workpiece. This means that the airflow and characteristics of the two jets must be "balanced". Since the air amplifier reacts to changes in this airflow, any position of the tool in the workpiece which reduces the airflow from one jet, must create a proportionate increase in airflow from an opposing jet. Jet diameters and "nozzle drops" must be identical, and on a common centerline with the outer diameter of the plug itself.

Any deviation in these two conditions of "balance" and "centrality" will cause indicator fluctuations commonly referred to as "total shake error". The following test procedures are recommended as the best methods of determining when an air tool should be removed from service. (Note these are only generalized recommendations and the results from each of these tests should be considered against the tolerance being measured with any specific air tool).

Ezin dugu neurgailuen iraupena aurreikusi. Probatutako pieza kopuru errealak (erabilera maiztasuna), neurgailuak probatzerakoan garbitasunak eta neurgailuak zatitzeko estankotasunak eragina dute neurgailuen bizitza ziurtagarrian.

Neurgailuak erabili bitartean higatu egin daitezke. Hala ere, higadura prebenitu daiteke neurgailua produktuan itsasten den hautsa, txirbilak edo burruna zainduz. Garbitu produktua horrelako gauzetatik ikuskatu aurretik neurgailua erabiliz.  

Berme epea ez da bereziki zehazten. Erosi ondoren epe laburrean ohiko erabileran gertatzen diren kalteak edo sintoma anormalak bereiz aztertuko eta kudeatuko ditugu.