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Transcript of calibration services J 19636-01-00 Calibration certificate Calibration mark 2014-11 Gegenstand...
113
MF
calibration services
J Purpose of calibration
J overview measured values
J scope of accreditation
DB_Calibration_services 01/2015
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The purpose of calibration
Correct and reliable measurements are prerequisites for all
high-quality industrial production. Among other things,
measuring and testing equipment is used for quantitatively
determining properties, as well as for controlling, regulating
and automating processes used in manufacturing. Measure-
ments are therefore an important element of industrial quality
assurance, as can be seen in DIN EN ISO 9000 and 9001.
All equipment used for measurements, including equipment for
auxiliary measurements, e. g. of environmental conditions, and
which have a significant influence on the accuracy and validity
of the result of the test or sampling, must be calibrated prior
to use.
To ensure the accuracy of measurement results, the
measuring instruments, test equipment and standards
must be referred back to SI units. All standards are
almost the same – but not quite. This is because the
different standards within the calibration hierarchy
are regularly compared to a fixed hierarchical
structure.
Measuring devices must be calibrated. In other words,
the deviation of the device reading from the correct
value of the measured quantity must be known.
PTBNationalStandard
Accredited DAkkS laboratory
ReferenceDAkkS certificate
Internalworks laboratory
Company standardsWorks certificates / Test certificates
Calibrator
Test equipment of the company
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At the very bottom of the hierarchy are the many different pieces
of test equipment within a company. In terms of temperature
measurement technology, these include desktop or hand-held
instruments, for example. Manual measuring instruments and
digital or analogue manometers are frequently used in pressure
measuring technology.
Since this test equipment wears, ages or drifts as a result of
constant use, it must be regularly connected to a company
standard. In the case of temperature or pressure measurement,
this standard is a temperature or pressure calibrator, which is
very often kept in protective storage in the company laboratory
and used solely for calibration purposes.
These calibrators are in turn regularly connected and tested
with standardsof the next higher hierarchy level, such as a
reference standard of a DAkkS laboratory.
At the very end of this closed chain is the national standard.
In Germany, the Physikalisch-Technische Bundesanstalt
(PTB) is responsible for realising and disseminating SI units.
It collaborates closely with the national metrology institutes
(NMI) in other countries to ensure the international equivalence
of measurement findings.
The following questions frequently arise: Are we actually using
the same dimensions? And do our instruments all operate
in the same way? So it is not surprising that reference to the
national standards is increasingly becoming the „norm“.
The decision as to which stage in the calibration hierarchy one
should „enter“ at is largely determined by the required level of
measurement accuracy. The following rule of thumb applies:
The further down the hierarchy, the more stages of comparison
between the standards have already been completed. The
standard is less accurate - but calibration is usually cheaper
and faster because it is less complicated.
A national standard embodies the most accurate
realisation of the unit of the International System of
Units (SI) available in a country.
With a DAkkS-certified temperature or pressure
calibrator, the customer receives a very precise
company standard. This company standard allows
works test certificates to be created for existing test
equipment very cost effectively. Traceability to national standards
is thus ensured.
Dr. Siebert & Kühn GmbH & Co. KG * Struthweg 7-9 * D-34260 Kaufungen * Telefon: 0 56 05/ 8 03 - 0 * Fax: 0 56 05/ 803 - 54/ 60
Dr. Siebert & Kühn GmbH & Co. KG Struthweg 7-9 34260 Kaufungen Germany
akkreditiert durch die / accredited by the
Deutsche Akkreditierungsstelle GmbH
als Kalibrierlaboratorium im / as calibration laboratory in the
Deutschen Kalibrierdienst 000271
Kalibrierschein Kalibrierzeichen
D-K- 19636-01-00
Calibration certificate Calibration mark 2014-11
Gegenstand Object
Mikrokalibrierbad Micro calibration bath
Hersteller Manufacturer
Dr. Siebert & Kühn GmbH & Co. KG 34260 Kaufungen
Typ Type
TP3M165E
Fabrikat/Serien-Nr. Serial number
1411861
Auftraggeber Customer
Mustermann AG Mustergass 1 12345 Musterstadt
Auftragsnummer Order No.
100 741 854
Anzahl der Seiten des Kalibrierscheines Number of pages of the certificate
4
Datum der Kalibrierung Date of calibration
2014-11-30
Dieser Kalibrierschein dokumentiert die Rück-führung auf nationale Normale zur Darstellung der Einheiten in Übereinstimmung mit dem Internationalen Einheitensystem (SI). Die DAkkS ist Unterzeichner der multilateralen Übereinkommen der European co-operation for Accreditation (EA) und der International Labora-tory Accreditation Cooperation (ILAC) zur ge-genseitigen Anerkennung der Kalibrierscheine. Für die Einhaltung einer angemessenen Frist zur Wiederholung der Kalibrierung ist der Benutzer verantwortlich. This calibration certificate documents the traceability to national standards, which realize the units of measurement according to the International System of Units (SI). The DAkkS is signatory to the multilateral agreements of the European co-operation for Accreditation (EA) and of the International Laboratory Accreditation Cooperation (ILAC) for the mutual recognition of calibration certifica-tes. The user is obliged to have the object recali-brated at appropriate intervals.
Dieser Kalibrierschein darf nur vollständig und unverändert weiterverbreitet werden. Auszüge oder Änderungen bedürfen der Genehmigung sowohl der Deutschen Akkreditierungsstelle GmbH als auch des ausstellenden Kalibrierlaboratoriums. Kalibrierscheine ohne Unterschrift haben keine Gültigkeit. This calibration certificate may not be reproduced other than in full except with the permission of both the Deutsche Akkreditierungsstelle GmbH and the issuing laboratory. Calibration certificates without signature are not valid.
Datum Date 2014-11-30
Stellv. Leiter des Kalibrierlaboratoriums Assistant Head of the calibration laboratory
Olaf Schilling
Bearbeiter Person in charge Olaf Schilling
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Temperature LaboratoryThe temperature laboratory is accredited for temperatures
from -30 °C to 1300 °C. Thermocouples, indicating temperature
measuring and test instruments, as well as temperature block
calibrators can be calibrated within this measuring range.
Resistance thermometers can be calibrated between -30 °C
and 960 °C. The basis of each calibration is the international
temperature scale of “ITS-90”. Measurements are executed
in accordance with DAkkS calibration guidelines of the
German national metrology institute (PTB) for temperatures
close to defined fixed points. This ensures the best possible
determination of the temperature characteristic curve. If
desired, other temperature values (e.g. from real operational
areas) can be included in the calibration.
Calibration services
For Pressure, Temperature and Electrical ValuesThe creation of a calibration service according “DAkkS Deutscher
Kalibrierdienst” for temperature, pressure and electrical
measured values firmly continues and underlines the long
tradition and more than 100 years of experience which SIKA has
in this sector. SIKA temperature and pressure sensors, as well
as measure, test and calibration instruments are available with
either a works test certificate or DAkkS calibration certificate.
This guarantees the traceability of measured values to approved
(national) standards as specified by DIN EN ISO 9000 ff in
numerous areas. Our DAkkS laboratory is your competent
contact for recalibration. Our services also include calibration
to DAkkS guidelines or calibration on the basis of works test
certificates for external products.
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Pressure LaboratoryThe calibration laboratory for “absolute pressure and positive
overpressure” allows the calibration of analogue and digital
pressure measuring devices and pressure sensors with an
electrical output signal (e. g. 0...10 V, 4...20 mA, ...). Calibration
is carried out as a comparison measurement against a dead
weight tester utilised as the DAkkS reference standard. The
dead weight tester is used to pressurise the instrument under
test with a defined pressure from 1...1200 bar. Depending on
the actual measuring range, the smallest possible measuring
uncertainties are 0.7 mbar.
Laboratory for Electric ValuesResistors and ohmmeters can be calibrated from 0 to 2 kΩ.
Depending on the resistance value, the smallest possible
measuring uncertainty is 0.1 mΩ. DC voltmeters and
transmitters can be calibrated between 0 and 20 VDC with a
smallest possible measuring uncertainty of 2 μV. DC testing
and measuring devices for standard signals (0)4...20 mA can
be calibrated with a smallest possible measuring uncertainty
of 0.05 μA.
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Scope of accreditation
* The smallest assignable measurement uncertainties are specified by DAkkS-DKD-3 (EA-4/02). These are expanded measurement uncertainties with a coverage probability of 95 % and, unless stated otherwise, have the multiplying factor k = 2. Uncertainties for which no unit of measurement is given are relative values in relation to the measuring value unless otherwise specified.
Measured value Measuring range Uncertainty of measurement
PressureAbsolute pressure Pabs 1 bar DIN EN 837:1997 / DAkkS-DKD-R 6-1:2010
EURAMET cg-17 / version 2.0principle of measurement pabs = pe + pamb
2...61 bar
> 61...1201 bar
Positive overpressure pe 0 bar DIN EN 837:1997 / DAkkS-DKD-R 6-1:2010EURAMET cg-17 / version 2.01...60 bar
> 60...1200 bar
Temperature
Resistance thermometers and direct indicating thermometer
0.00 °C Icepoint
-30...0 °C Oil bath with Al-Block
> 0...100 °C
> 100...300 °C Silicon oil bath with Al-Block
> 300...550 °C Salt bath
> 550...660 °C Tube furnace withNa-Heat pipe> 660...960 °C
Noble metal thermocouples -30...550 °C Oil bath with Al-Block
> 550...1000 °C Tube furnace with Na-Heat pipe
> 1000...1300 °C Tube furnace
Base metal thermocouples -30...200 °C Thermostatted bath
> 200...550 °C
> 550...1000 °C Tube furnace with Na-Heat pipe
> 1000...1300 °C Tube furnace
Temperature block calibrators -55...-35 °C DAkkS-DKD-R 5-4:2010
> -35...133 °C
> 133...660 °C
> 660...1000 °C
> 1000...1300 °C
Electrical Values
Indicators and simulators for thermocouples
-200...1750 °C Noble metal thermocouples / DAkkS-DKD-R 5-5:2010
-200...1750 °C Base metal thermocouples / DAkkS-DKD-R 5-5:2010
Indicators and simulators for resistance thermometer
-200...850 °C Direct resistance measuring / DAkkS-DKD-R 5-5:2010
-200...850 °C Calibration with resistance simulator / DAkkS-DKD-R 5-5:2010
Voltage (DC) 0.0...0.1 V
> 0.1...0.2 V
> 0.2...20 V
Current (DC) 0...2 mA
> 2...20 mA
Electrical resistance 0...2 kΩ Measuring with digital multimeter
0 ...25 Ω AC measuring, 75 Hz
> 25...100 Ω
> 100...400 Ω
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Measured value Measuring range Uncertainty of measurement Minimum measurement uncertainty * Remarks
PressureAbsolute pressure Pabs 0.1 mbar + 6.5 x 10-5 x pabs Pressure medium: Oil
The expected uncertainty of measurement of the used barometer is to be considered. Atmospheric air pressure pamb1.5 mbar + 7.0 x 10-5 x pabs
Positive overpressure pe 0.1 mbar + 6.5 x 10-5 x pe Pressure medium: Oil
1.5 mbar + 7.0 x 10-5 x pe
Temperature
Resistance thermometers and direct indicating thermometer
10 mK Calibration on fixed-point of temperatur
30 mK In comparison with resistance thermometer in thermostatted baths
15 mK
25 mK
25 mK
0.1 K In comparison with resistance thermometer
0.8 K
Noble metal thermocouples 0.5 K In comparison with thermocouples
1.2 K
1.8 K
Base metal thermocouples 0.2 K In comparison with resistance thermometer and thermocouples
1.0 K
1.5 K
2.5 K
Temperature block calibrators 0.3 K In comparison with resistance thermometer and thermocouplest = Measuring value °C0.2 K
1.5 mk* t / °C
2.5 K
4.5 K
Electrical Values
Indicators and simulators for thermocouples
0.70 K
0.20 K
Indicators and simulators for resistance thermometer
6 x 10-6 x R R =Measuring value
10 mK
Voltage (DC) 2 μV U = Measuring value
4 μV
50 x 10-6 x U
Current (DC) 0.05 μA I = Measuring value
0.1 x 10-3 x I
Electrical resistance 10 x 10-6 x R + 1 mΩ R = Measuring value
0.1 mΩ
5 x 10-6 x R
6 x 10-6 x R