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Accredited
Calibration Services
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The international recognition of the
ÖKD calibration certificates is guaranteed by BMWA membership
of the European cooperation for Accreditation (EA). At present
the calibration services of 24 European countries are members of
the EA.
Sixteen of these calibration services, including the BMWA, have
concluded a multilateral agreement on the mutual recognition of
their calibration certificates.
In addition similar agreements have been concluded with the
following accreditation bodies: |
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| Certificate of Accreditation
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Measuring uncertainty
The ÖKD accreditation guarantees following outstanding
uncertainty of the E+E calibration
laboratory.
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| Adjustment
- Definition
The output of the instrument under test is compared with a reference. Each deviation is corrected by hardware or software. All E+E instruments are adjusted before delivery. Depending on the instrument, the standard adjustment is made in one or two points. |
| Calibration
- Definition
The output of the instrument under test is compared with a reference The deviations are documented as
a calibration certificate, but not changed. |
| ÖKD certificate - Definition
The ÖKD certificate is issued by the accredited E+E calibration laboratory
for measured values between 10 and 95 %RH at a temperature of 25 ±3
°C. |
| E+E works
certificate - Definition
The E+E works certificate is a specific test report according
to DIN EN 10204-2.3.
It is issued by E+E Elektronik and for measured values between 10 and 95 %RH at a temperature of 23 ±2
°C. |
| Maintenance of RH Transmitter
Due to the excellent reliability and long term stability
under normal operation conditions the E+E relative humidity and
temperature transmitters do not require any maintenance. For use
in high polluted environment the filter cap shall be
periodically exchanged with a new original one.
For high accuracy requirements under extreme humidity and
temperature operating conditions the transmitters can be
periodically recalibrated. The recalibration interval can be
extended by a special E+E low or high humidity calibration. The
following graph should be used as guide for the recalibration
interval: |
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| Order
Information |
| ÖKD - Certificate Order Number |
ÖKD calibration at three humidity values between 10 and 95 %RH.
If not otherwise specified: 30, 50, 80 %RH
T = 25 °C ±3 °C
ÖKD-CERT/H30-50-80 |
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| E+E - Certificate - Humidity |
E+E calibration at three humidity values between 10 and 95 %RH.
If not other way specified: 30, 50, 80 %RH
T = 23 °C ±2 °C
E+E-CERT/H30-50-80 |
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| E+E - Certificate - Temperature |
E+E calibration at three temperature values.
If not other way specified: 5, 20, 40 °C
E+E-CERT/T5-20-40 |
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| E+E - Certificate - Air velocity |
E+E calibration at three low air velocity values.
If not other way specified: 0.5, 1.0, 1.5 m/s
T = 23 °C ±2 °C
E+E-CERT/V0.5-1-1.5 |
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| E+E - Certificate - Air velocity |
E+E calibration at three high air velocity values.
If not other way specified: 5, 10, 15 m/s
T = 23 °C ±2 °C
E+E-CERT/V5-10-15 |
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Calibrations
carried out by E+E accredited calibration laboratory guarantees
reliable measurement results. The E+E calibration laboratory is
accredited for relative humidity of air and supervised by BMWA
(Federal Ministry for Economic Affairs). The laboratory
calibrates electric instruments measuring humidity in the range
of 10% -95 %RH at a temperature of 25 °C ±3 °C. The
registration number of the calibration laboratory is ÖKD 23.
The ÖKD Calibration Certificates prove traceability to national
standards as required in the ISO 9000 and EN 45 000 series of
European standards.
