FAQ

What is metrology?

The Metrology is the science of measurement and its applications.
Metrology includes all theoretical and practical aspects of measurement, whatever the measurement uncertainty and field of application. The direct objective of the Metrology is Measure, ie, to determine a numerical measure.

What is calibration?

Calibration is a set of operations and measures to establish, under specified conditions, the relationship between indicated values by a measuring instrument, or values represented by a reference material and the corresponding values of the magnitude to be measured.

Where can I calibrate my equipment?

You can calibrate your equipment in the EH Lab calibrations laboratory. You can contact us or in option to send a list of equipments, calibration range, so that will be sent a proposal for the service.

What is Verification?

Set of operations carried out by an agency of the National Legal Metrology (or other authorized body) to verify and confirm that the measuring instrument fully meet regulatory requirements.

Why Calibrate?

To eliminate waste because of non-compliant production or misfit costs.
To understand the behavior of the instruments.
To ensure quality standards in manufactured products.
To ensure traceability of measurements.

Calibrate what?

All instruments whose accuracy has influence on the quality of the results, either in the production area, which in the Laboratory.

Examples:
- Balances production / Laboratory
- Indicators / controllers / Loops temperature
- Thermometers
- Greenhouses
- Indicators / pressure gauges
- Meters pH and free chlorine
- Autoclave
- Conductivity Meters
- Flow Meters
- Etc.

What is the MPE (maximum permissible error) or Acceptance Criteria?

These are the extreme values of the error permitted by specifications, regulations, procedures, etc., for a given instrument.
Sets the maximum acceptable stopping | Error | + | Uncertainty | equipment.

What is the "error"?

It is the algebraic difference between the measurement result and the true value of the measured quantity, ie, the difference between the indicated value by the calibration of equipment and the default value generated.

What is Uncertainty?

It is non-negative parameter that characterizes the dispersion of values that are assigned to the magnitude measured from the information used.
Associated legislation: European Standard EA-4/02

That acceptance criteria should I use?

Depends primarily on the intended use of the measuring instrument, the gain to be achieved economically acceptable values and in which the equipment is running.

What is the frequency of calibration for a particular measuring instrument or standard?

Given the desired feedback gain, comprises the varying of the conditions of use, frequency of use, the associated risk derives from the correct calibration mode to set the appropriate frequency and monitoring the adequacy of the same.

How do I identify my equipment?

The device shall be identified by code (serial number or not) such that it is not confused with other similar equipment. This identification should be visible through a label, which may also be identified a range of equipment operation, resolution, in serial, code.
With the equipment must also be placed a label to identify the last and next calibration.

What are of Calibration / compliance seals?

The calibration/compliance seals, are labels which identify the state of a given compliance of the equipment, ie, whether or not this is the state values within the predetermined acceptance criterion. Usually indicates whether the equipment is "Approved" or "Rejected", being identified with the "Rejected " should be put out of operation until correction.
The seal calibration / conformity must unambiguously identify the equipment to which it relates.

Have more questions?

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end faq