03/09/2007Häfelfinger/Roth

Slide 1

E+H Calibration Philosophy

03/09/2007

The Proline Concept

Calibration

Promag

Promass

Prosonic Flow

Prowirl

T-mass

DP-Flow

Calibration

E + H Flow meters …………..

JA Salusbury

Slide 2

03/09/2007

The Proline Concept

Calibration

Promag

Promass

Prosonic Flow

Prowirl

T-mass

DP-Flow

Calibration

Flow Measurement - Calibration E+H Philosophy

Häfelfinger/Roth

Slide 3

What are we talking about

Flowmeter Accuracy

03/09/2007

The Proline Concept

Calibration

Promag

Promass

Prosonic Flow

Prowirl

T-mass

DP-Flow

Calibration

Flow Measurement - Calibration E+H Philosophy

Häfelfinger/Roth

Slide 4

Accuracy and Repeatability

A B

DC

High accuracy = good repeatability (A), but good repeatability does not necessarily mean high accuracy (C)!

03/09/2007

The Proline Concept

Calibration

Promag

Promass

Prosonic Flow

Prowirl

T-mass

DP-Flow

Calibration

Flow Measurement - Calibration E+H Philosophy

Häfelfinger/Roth

Slide 5

0

2

4

6

8

10

0 2 4 6 8 10

Meter reading

Ref

eren

ce re

adin

g

Zero offset

gain error

ideal output

Calibration does matter

Calibration Definition:

Calibration is the comparison of a meter with a well know reference (calibration rig) and if necessary adjustment in order to obtain a correct reading.

Compensate for:• Zero offset

• Gain error

For proper, credible calibration you need to have a good reference

=> The rig must be accredited

03/09/2007

The Proline Concept

Calibration

Promag

Promass

Prosonic Flow

Prowirl

T-mass

DP-Flow

Calibration

Flow Measurement - Calibration E+H Philosophy

Häfelfinger/Roth

Slide 6

E+H Flow meter specifications (acc. to standards)

=

Accredited calibration capabilitymeter capabilityspecified accuracy

+

This means meter accuracy can never be better than calibration capability!!!

03/09/2007

The Proline Concept

Calibration

Promag

Promass

Prosonic Flow

Prowirl

T-mass

DP-Flow

Calibration

Flow Measurement - Calibration E+H Philosophy

Häfelfinger/Roth

Slide 7

Accreditation, What‘s it all about

Accreditation is the formal recognition of nationalgovernmental authority to execute a specific service

Examples of Accredition Bodies are:

METAS (Switzerland), NMI (Holland), A2LA (USA)

Accredited organinsations may be:

material testing labs (TÜV, Lloyds etc.) or even private companies

The Procedures for Laboratory Accreditation are defined in ISO17025

Endress+Hauser Flowtec is accredited as a flow calibration laboratory by METAS and A2LA

03/09/2007

The Proline Concept

Calibration

Promag

Promass

Prosonic Flow

Prowirl

T-mass

DP-Flow

Calibration

Flow Measurement - Calibration E+H Philosophy

Häfelfinger/Roth

Slide 8

Accreditation, What’s it all about

Accreditation is the key to transparency, confidence and comparability and it should eliminate international trade barriers.

Together with the accrediting body the uncertainty and traceability of the measuring chain is established

Measuring uncertainty claims coming from non accredited calibration rigs are generally regarded as not credible.

E+H aims to have technical solutions (specs) and accreditations based on ISO 17025, in all production and service centers world wide!

03/09/2007

The Proline Concept

Calibration

Promag

Promass

Prosonic Flow

Prowirl

T-mass

DP-Flow

Calibration

Flow Measurement - Calibration E+H Philosophy

Häfelfinger/Roth

Slide 9

Calibration Methods

Primary Calibration Secondary Calibration

Weight scale Flying-Start-Stop (diverter)

Master meter

Weight scale Standing-Start-Stop (inferior)

Secondary methods inherently have higher uncertainties than any primary calibration method. Reproducibility of master does add to uncertainty.

ISO 4185: Standard for calibration with gravimetric references

Factory Calibration

Mobile Calibration

Calibration Management

03/09/2007

The Proline Concept

Calibration

Promag

Promass

Prosonic Flow

Prowirl

T-mass

DP-Flow

Calibration

Flow Measurement - Calibration E+H Philosophy

Häfelfinger/Roth

Slide 10

State of the art, Gravimetric/Flow diverter (Primary)

Constant Flowrate

Water - Reservoir

UUT =unit under test

weighing tank

Flow Diverter

Freq

uenc

y

kg

START

STOP

oC

ComputerComputer

03/09/2007

The Proline Concept

Calibration

Promag

Promass

Prosonic Flow

Prowirl

T-mass

DP-Flow

Calibration

Flow Measurement - Calibration E+H Philosophy

Häfelfinger/Roth

Slide 11

Master Cal. (Secondary Calibration)

Water - Reservoir

UUT

Mas

ter

Ger

äte

Constant flow

oC

START

STOPComputer

Freq

uenc

yFr

eque

ncy

Freq

uenc

yFr

eque

ncy

time&temp.

03/09/2007

The Proline Concept

Calibration

Promag

Promass

Prosonic Flow

Prowirl

T-mass

DP-Flow

Calibration

Flow Measurement - Calibration E+H Philosophy

Häfelfinger/Roth

Slide 12

Water Tower with Overflow (Cernay)

Tower-Tank25 m3

Edge

of o

verf

low

= 2

3,9

m

Q Max. 1650 l/s

Main-water-reservoir 1‘300 m3 total

Dev

ice

unde

r te

st

Constant overflow = stableconditions at the location of

the DUT

03/09/2007

The Proline Concept

Calibration

Promag

Promass

Prosonic Flow

Prowirl

T-mass

DP-Flow

Calibration

Thermal Flow

Slide 13

Calibration Rig Characteristics

Calibration with air at 1 atm.

Repeatable and stable ambient conditions

Controlled temperature and humidity

Undisturbed fully developed flow profile

Master meters: turbines, rotary pistons and sonic nozzles for various flow ranges

Max. flow rate: 10 000 kg/h

Measurement uncertainty: ±0.3 % o.r.

ISO/IEC 17025 accredited*

65F / 65I

03/09/2007

The Proline Concept

Calibration

Promag

Promass

Prosonic Flow

Prowirl

T-mass

DP-Flow

Calibration

Thermal Flow

Slide 14

Calibration Benches

Automated positioning of the Device Under Test

Revolvers for flanged sensors DN15…100 (1/2”…4”)

Optional calibration with flow conditioner (65F sensor)

Straight pipe section for insertion sensors

Specific calibration for DN80 (3”), DN100 (4”) and ≥DN150 (6”)

65F / 65I

03/09/2007

The Proline Concept

Calibration

Promag

Promass

Prosonic Flow

Prowirl

T-mass

DP-Flow

Calibration

Thermal Flow

Slide 15

Standard Calibration Certificate

65F / 65I

03/09/2007

The Proline Concept

Calibration

Promag

Promass

Prosonic Flow

Prowirl

T-mass

DP-Flow

Calibration

Flow Measurement - Calibration E+H Philosophy

Häfelfinger/Roth

Slide 16

Advantages of a Water Tower with Overflow

Absolutely stable conditions during the entire calibration

No pump pulsations

No entrained air in the water

No pressure changes during calibration

No differences in compressibility of the water between DUT and scales (masters)

No regulation of the flow rate during calibration

No level measurement

03/09/2007

The Proline Concept

Calibration

Promag

Promass

Prosonic Flow

Prowirl

T-mass

DP-Flow

Calibration

Flow Measurement - Calibration E+H Philosophy

Häfelfinger/Roth

Slide 17

Influence on calibration accuracy

Gravimetric

kg

Vol/d

How big is the influence of the surrounding air on the reading of the scales? Make a guess.

Answer: approx. 0.1%!!!

This must be compensated by the calibration rig in order for the meters to be within the specs.

03/09/2007

The Proline Concept

Calibration

Promag

Promass

Prosonic Flow

Prowirl

T-mass

DP-Flow

Calibration

Flow Measurement - Calibration E+H Philosophy

Häfelfinger/Roth

Slide 18

Traceability chain of E+H Flowtec calibration standExample, FCP 7.2 in Cernay

FullTraceability means an uninterrupted

chain of proof regarding the test equipment, from the test device to the hierarchically

highest standard in each country

“national standard”,confirmed by an accreditation: Switzerland-Metas

Germany-PTB

03/09/2007

The Proline Concept

Calibration

Promag

Promass

Prosonic Flow

Prowirl

T-mass

DP-Flow

Calibration

Flow Measurement - Calibration E+H Philosophy

Häfelfinger/Roth

Slide 19

The E+H way: World wide use of primary calibrations

±0,05% Total Accredited

Uncertainty

“Accredited calibration stands (ISO 17025)”in all production locations used by E+H for all

produced Coriolis meters.

≡≡ ≡

METAS A2LA Accreditation in progress

Identical technical solutions

03/09/2007

The Proline Concept

Calibration

Promag

Promass

Prosonic Flow

Prowirl

T-mass

DP-Flow

Calibration

Flow Measurement - Calibration E+H Philosophy

Häfelfinger/Roth

Slide 20

Promass is used as „Transfer standard“ at BIPM

Because of highest accuracy and repeatability PROMASS was selected as the transfer normal for inter comparison test of national metrology institutes

Target of this inter comparison test was to determine the uncertainty of the calibration stands of these national metrology institutes.

Source: BIPM BIPM = Bureau International des Poids et Measure

03/09/2007

The Proline Concept

Calibration

Promag

Promass

Prosonic Flow

Prowirl

T-mass

DP-Flow

Calibration

Flow Measurement - Calibration E+H Philosophy

Häfelfinger/Roth

Slide 21

Comparison of national calibration rigs

Country Institute Max. flow rate (m3/h)

Uncertainty (%)

Confident interval (%)

Korea KRISS 400 0.072 95

Japan NMIJ 3000 0.06 95

Germany PTB 2100 0,02* 95

U.K. NEL 5760 0.1 95

Mexico Cenam 720 0.12 95

03/09/2007

The Proline Concept

Calibration

Promag

Promass

Prosonic Flow

Prowirl

T-mass

DP-Flow

Calibration

Flow Measurement - Calibration E+H Philosophy

Häfelfinger/Roth

Slide 22

ABB Stonehouse UK

Best uncertainty

0.053%

03/09/2007

The Proline Concept

Calibration

Promag

Promass

Prosonic Flow

Prowirl

T-mass

DP-Flow

Calibration

Flow Measurement - Calibration E+H Philosophy

Häfelfinger/Roth

Slide 23

ABB Alzenau (Gas) and Göttingen

• Göttingen, ex F&P, 1,5 – 16m3/h – 0,1% 50 – 3000m3/h – 0,15% (Accred),

- 23‘000m3/h, n.A.

03/09/2007

The Proline Concept

Calibration

Promag

Promass

Prosonic Flow

Prowirl

T-mass

DP-Flow

Calibration

Flow Measurement - Calibration E+H Philosophy

Häfelfinger/Roth

Slide 24

Siemens Flow Instruments Ltd. UK

• Nordholt (DK) 0,03 – 28 m3/h – 0,07%1,0 – 1000m3/h - 0,1 %1,0 – 1400m3/h – 0,25%

Ex Danfoss

03/09/2007

The Proline Concept

Calibration

Promag

Promass

Prosonic Flow

Prowirl

T-mass

DP-Flow

Calibration

Flow Measurement - Calibration E+H Philosophy

Häfelfinger/Roth

Slide 25

Sensus Metering DE

Best uncertainty 0.12%

03/09/2007

The Proline Concept

Calibration

Promag

Promass

Prosonic Flow

Prowirl

T-mass

DP-Flow

Calibration

Flow Measurement - Calibration E+H Philosophy

Häfelfinger/Roth

Slide 26

Rota Yokogawa, Wehr GE

Best uncertainty:

0.1%

03/09/2007

The Proline Concept

Calibration

Promag

Promass

Prosonic Flow

Prowirl

T-mass

DP-Flow

Calibration

Flow Measurement - Calibration E+H Philosophy

Häfelfinger/Roth

Slide 27

KEM Küppers, Karlsfeld GE

Manufacturer of Turbines, 0.1%

03/09/2007Häfelfinger/Roth

Slide 28

Thank you very muchfor your attention