technical protocol for gulfmet.m.p-s1 digital pressure ...€¦ · the final report will form the...
TRANSCRIPT
Technical Protocol for GULFMET.M.P-S1 Digital Pressure Gauge Comparison in Gas Pressure in the Range of 0.7 MPa to 7 MPa
1/13
TECHNICAL PROTOCOL
for GULFMET.M.P-S1
Digital Pressure Gauge Comparison in Gas
Pressure in the Range from 0.7 MPa to 7 MPa
TÜBİTAK UME
(Rev. 1)
February 21, 2017
Technical Protocol for GULFMET.M.P-S1 Digital Pressure Gauge Comparison in Gas Pressure in the Range of 0.7 MPa to 7 MPa
2/13
Contents
Contents 1. Introduction ................................................................................................................................... 3
2. Transfer Standard.......................................................................................................................... 3
2.1. Stability of Transfer Standard .................................................................................................. 5
3. Participant Laboratories ................................................................................................................. 5
4. Time Schedule .............................................................................................................................. 5
5. Transportation ............................................................................................................................... 6
6. Measurement Quantities and Points................................................................................................ 6
7. Calculation of the Comparison Reference Value .............................................................................. 6
8. Measurement Procedure ................................................................................................................ 6
8.1. Unpacking, handling, and care of the standards ....................................................................... 6
8.2. Measurement Method and Instructions .................................................................................... 7
9. Measurement Uncertainty .............................................................................................................. 8
10. Evaluation of Results and Report ................................................................................................ 8
10.1. Reporting Results................................................................................................................... 8
11. Final Report of the Comparison................................................................................................... 9
12. References .............................................................................................................................. 11
ANNEX 1* .......................................................................................................................................... 12
ANNEX 2* .......................................................................................................................................... 13
Technical Protocol for GULFMET.M.P-S1 Digital Pressure Gauge Comparison in Gas Pressure in the Range of 0.7 MPa to 7 MPa
3/13
1. Introduction
Interlaboratory comparisons are significant tools for the test/calibration laboratories to
assuring the quality of test and calibration results. Accredited laboratories and other
laboratories that operate a quality management system for their working areas are
expected to join into multi-participant intercomparisons in certain time periods to show
and assure their service quality. Interlaboratory comparisons are conducted for a number
of purposes. Determining the performances of individual laboratories for some specific
tests or measurements and to monitor laboratories’ continuing performances [1].
The comparison is planned to organize on Gas Pressure in gauge measurement mode
from 0.7 MPa up to 7 MPa. A paroscientific digital pressure gauge is selected as a
transfer standard. The comparison has been registered to GULFMET and BIPM
database as GULFMET.M.P-S1 which is piloted by TÜBİTAK UME. The pilot laboratory
is responsible for preparing the measurement instructions, checking the stability of the
transfer standard, analysing the results and preparing the final reports.
2. Transfer Standard
The transfer standard will be provided by TÜBİTAK UME.
Transfer standard is Paroscientific 745-1K Digital Pressure Gauge (Serial No: 114944)
Technical Protocol for GULFMET.M.P-S1 Digital Pressure Gauge Comparison in Gas Pressure in the Range of 0.7 MPa to 7 MPa
4/13
Figure 1. Transfer standard is a Paroscientific 745-1K Digital Pressure Gauge
The general specification of 745-1K is presented in Table 1.
Table 1. The general specifications of 745-1K
Name Digital Pressure Gauge
Measurement Range 0 – 1000 psia
Manufacturer Paroscientific, Inc.
Model No 745-1K
Serial No 114944
Pressure Connection NPT 1/4″ female
Pressure Media (operates with) Gas (nitrogen)
Transfer Standard Package
Including List
1. Paroscientific digital pressure gauge with NPT1/4″
female pressure adaptor (please try to use this
adaptor and do not remove it)
2. Battery charger (main power adaptor)
Technical Protocol for GULFMET.M.P-S1 Digital Pressure Gauge Comparison in Gas Pressure in the Range of 0.7 MPa to 7 MPa
5/13
2.1. Stability of Transfer Standard
In order to monitor the stability of the transfer standard characteristics during the comparison, UME
will perform intermediate calibrations. Circulation scheme of transfer standard is presented in
Table 2. In order to take into account a possible drift of the transfer standard, the instability of the
transfer standard will be evaluated. Since the drift rate can be different during the comparison time,
the instability will be evaluated in each loop and applied to the results of participants.
3. Participant Laboratories
The pilot institute of the comparison is TÜBİTAK UME (Turkey). The contact details of the
coordinator are given below:
Pilot Institute: TÜBİTAK Ulusal Metroloji Enstitüsü (UME)
Coordinator : Dr. Yasin Durgut
Tel: +90 262 679 50 00 (5200)
Fax: +90 262 679 50 01
E-mail: [email protected]
The participating institutes and contact persons with their addresses are presented in Table 2.
Table 2. Participants
Country Institute Acronym Shipping Address Contact Person
Turkey TÜBİTAK
Ulusal Metroloji Enstitüsü
TÜBİTAK UME
TÜBİTAK Ulusal Metroloji Enstitüsü (UME)
TÜBİTAK Gebze Yerleşkesi
Barış Mah. Dr. Zeki Acar Cad. No:1
41470 Gebze-Kocaeli, TURKEY
Yasin Durgut
[email protected] Tel: +90 262 679 50 00
4. Time Schedule
The measurements with the transfer standard should be performed strictly in accordance with the
schedule given below. In the case of not foreseeable problems which may require a change of the
schedule its amendment will be suggested and agreed with the participants and the pilot
laboratory. Measurement schedule is given in table 3.
Technical Protocol for GULFMET.M.P-S1 Digital Pressure Gauge Comparison in Gas Pressure in the Range of 0.7 MPa to 7 MPa
6/13
Table 3. Circulation Time Schedule
Acronym of Institute
Country Estimated
Starting Date Time for measurement
and transportation
TÜBİTAK UME Turkey 01.06.2017 30 days
5. Transportation
For transportation, the instrument is packed in a special case.
A courier service can be used for transportation. Hand-carrying to the next participant is also
possible.
Each participant is responsible for the costs of sending the instrument to the next laboratory.
6. Measurement Quantities and Points
The quantities to be measured and the measurement points are given in Table 4.
Table 4. Measurement quantity and points
Quantity Measurement Points
Pressure (Gas)
(0, 0.7, 1.4, 2.1, 2.8, 3.5, 4.2, 4.9, 5.6, 6.3, 7.0) MPa
7. Calculation of the Comparison Reference Value
The Comparison Reference Value (CRV) for each measurement point will be calculated using the
results of the pilot institute.
8. Measurement Procedure
8.1. Unpacking, handling, and care of the standards
When the transfer standard arrives at the participating laboratory the transfer standard should be
checked for any damage and missing items. A full set of items is described in Table 1.
Participants shall send an e-mail to the pilot laboratory ([email protected]) notifying
about:
Technical Protocol for GULFMET.M.P-S1 Digital Pressure Gauge Comparison in Gas Pressure in the Range of 0.7 MPa to 7 MPa
7/13
Name of Laboratory
Date of receipt of the transfer standards by the laboratory
If any physical damage of the standards, in particular scratches and rust on transfer
instrument is available or not
If there is any missing item in the package
After finishing the measurements, transfer standard should be packaged carefully. When
dispatching the package, each participant has to give the transportation details to the next
participant and to the pilot laboratory. Each participant is responsible for the costs of sending the
instrument to the next laboratory as detailed in measurement schedule in Table 3.
8.2. Measurement Method and Instructions
Latest, twenty-four hours before starting the measurements, test instrument should be
placed at the same place with the reference instrument where measurements will be
carried out.
Test instrument should be connected to the main power supply and switched on by
pressing the ON/OFF button for warming up and stabilization for two (2) hours before the
measurement.
Three (3) preloading exercises up to 7 MPa (full scale) should be done before
measurement. Waiting time at the full scale is one (1) minutes and waiting times between
preloading are two (2) minutes during the preloading exercises. Please see Figure 1.
After preloading exercises finished, wait for 5 minutes for stabilization before measurement.
Make the instrument zero. At the beginning of each cycle, the instrument should be zeroed.
Following steps are done to zero the instrument:
Press “Menu” button. Use arrow keys to choose “Tare Menu” and enter. Use arrow keys
and choose “Tare” and enter. Now it’s written ‘’updating’’. After this procedure, the test
instrument displays zero. Also, refer to user manual if necessary.
Each participant should carry out 3 calibration cycles. Each cycle should be conducted in
an ascending, and then descending sequence of ten (10) pressure points. Comparison
scheme is given in Figure 1. Nominal pressure points for comparison measurement are
0 MPa, 0.7 MPa, 1.4 MPa, 2.1 MPa, 2.8 MPa, 3.5 MPa, 4.2 MPa, 4.9 MPa, 5.6 MPa,
6.3 MPa and 7 MPa.
Technical Protocol for GULFMET.M.P-S1 Digital Pressure Gauge Comparison in Gas Pressure in the Range of 0.7 MPa to 7 MPa
8/13
At each calibration point, after loading the nominal pressure, wait for thirty (30) seconds for
the stabilization and follow the test display for 15 seconds and take the test reading after
reading is been stabilized.
The resolution of test standard is adjusted into 1 millibar.
Measurements will be done in gauge mode.
Measurements should be done at environmental conditions of temperature (20 ± 1) °C and
relative humidity (50 ± 25) %rh.
Place the transfer instrument in a horizontal position. Connect the transfer standard to the
reference standard. Try to adjust height difference between the test and the reference
standards as close to zero as possible.
Environmental conditions that affect measurements should be noted and reported together
with results.
Figure 2. Comparison Measurement Scheme
9. Measurement Uncertainty
The uncertainty of measurement must be calculated according to Guide to the Expression of
Uncertainty in Measurement (GUM) document [2].
All contributions to the measurement uncertainty should be listed in the report submitted by each
participant.
10. Evaluation of Results and Report
10.1. Reporting Results
Important Remark: After measurements have been done, each participant should prepare
and sent to pilot laboratory Annex 1 and Annex 2 in two weeks.
Annex1 includes the following information.
Technical Protocol for GULFMET.M.P-S1 Digital Pressure Gauge Comparison in Gas Pressure in the Range of 0.7 MPa to 7 MPa
9/13
Participant laboratory information
Notes of inspection of the package (e.g. Damages, any problems)
Reference instrument information (manufacturer, model, serial no, measurement
range, traceability information, uncertainty)
A detailed description of how the measurements were performed (general procedure, a
schematic/photo of the experimental set-up, the duration of the temperature stabilization at
(20 ± 1) °C etc.).
Date of receipt and dispatch of the transfer standard
Dates of measurements
Measurement environmental conditions (temperature, relative humidity, atmospheric
pressure)
Annex 2 is for reporting measurement results in the frame of the comparison. While Annex 1 is
asked to be sent preferably in Word format, Annex 2 is asked to send in Excel format.
11. Final Report of the Comparison
The pilot institute is responsible for the preparation of a comparison report. The draft version of
the comparison report will be issued within two months after receiving the participant report by the
pilot institute. The draft report will be sent to the participants for discussion and approval. This
draft will be confidential to the participants. The participants will have one week to send their
comments on Draft Report. After revisions if available and approval of the Draft Report, it will be
published as the Final Report. The Final Report will form the basis for the publication of results.
Comparison results will be evaluated according to the En value which is calculated by Equation
(1) stated at ISO/IEC 17043 “Conformity assessment — General requirements for proficiency
testing” [1] standard.
(1)
xlab: Participant laboratory measurement result,
xref: Pilot laboratory measurement result,
Ulab: Participant laboratory measurement uncertainty,
Uref: Pilot laboratory measurement uncertainty
22reflab
reflab
n
UU
xxE
Technical Protocol for GULFMET.M.P-S1 Digital Pressure Gauge Comparison in Gas Pressure in the Range of 0.7 MPa to 7 MPa
10/13
The laboratory measurement results will be utilized according to the En criteria. The treatment of
the results based on the value of En will be made in the following way:.
If │En│≤ 1 then it is successful
If │En│> 1 then it is unsuccessful
Technical Protocol for GULFMET.M.P-S1 Digital Pressure Gauge Comparison in Gas Pressure in the Range of 0.7 MPa to 7 MPa
11/13
12. References
[1] ISO/IEC 17043 “Conformity assessment — General requirements for proficiency testing”,
International Standardization Organization”, 2010
[2] Guide to the Expression of Uncertainty in Measurement (GUM), September 2008
Technical Protocol for GULFMET.M.P-S1 Digital Pressure Gauge Comparison in Gas Pressure in the Range of 0.7 MPa to 7 MPa
12/13
ANNEX 1*
*Annex1 should be prepared in MS Word format and sent by e-mail to pilot laboratory within
2 weeks after the measurements.
Participant laboratory and its full address
Contact person name, e-mail, phone
Notes of inspection of the package (e.g. Damages,
missing items any problems)
Reference
instrument
information
Manufacturer
Model
Serial no
Measurement range
Traceability information
A detailed description of how the measurements
were performed
(general procedure, a schematic/photo of the
experimental set-up, the duration of the temperature
stabilization at (20 ± 1) °C etc.).
Date of receipt of the transfer standards by laboratory
Date of dispatch of the transfer standards from
laboratory
Date of measurements
Measurement
environmental
conditions
Temperature (°C)
Relative humidity (%rh)
Atmospheric pressure (hPa)
Technical Protocol for GULFMET.M.P-S1 Digital Pressure Gauge Comparison in Gas Pressure in the Range of 0.7 MPa to 7 MPa
13/13
ANNEX 2*
*Annex2 should be prepared in MS Excel format and sent by e-mail to pilot laboratory within 2
weeks after the measurements
CALIBRATION RESULTS
Nominal Pressure
/MPa
Reference Pressure
/MPa
Test Pressure
/MPa
Error
/MPa
u(ref)
/MPa
u(r)
/MPa
u(fo)
/MPa
u(b)
/MPa
U
/MPa
0
0.7
1.4
2.1
2.8
3.5
4.2
4.9
5.6
6.3
7.0
7.0
6.3
5.6
4.9
4.2
3.5
2.8
2.1
1.4
0.7
0
Remarks for Annex 2
Nominal Pressure Nominal pressure value in MPa in increasing and decreasing directions
Reference Pressure Reference pressure value in MPa
Test Pressure Test pressure value displayed by transfer standard in MPa
Error Error value in MPa.
It is calculated as (test pressure-reference pressure)
u(ref) Reference instrument standard uncertainty (k=1)
u(r) Test instrument resolution standard uncertainty (k=1)
u(fo) Zero error standard uncertainty (k=1)
u(b) Repeatability standard uncertainty (k=1)
U (e) Expanded measurement uncertainty (k=2)