s written authority of Druck Limited.
English
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K235 Issue No. 5
DPI 61X Series
Calibration Procedures
DPI 61X IS Series Intrinsically Safe Instrument Versions
Calibrator Version Indicator Version
Hyraulic Calibrator Version
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K235 Issue No. 5
Calibration Procedures
DPI 61X Series
English
Contents
General ................................................................................................... 5
Introduction ............................................................................................. 6
General Procedures .......................................................................... 6
Calibration Protection ....................................................................... 6
Calibration Check ............................................................................. 7
Calibration Adjustment ...................................................................... 7
Test Equipment ................................................................................. 7
Using The Calibration Menu ............................................................. 7
Change Calibration PIN Number ............................................................ 8
Calibrate Internal Ranges ....................................................................... 9
Pressure ........................................................................................... 9
Voltage Input Range ( 5 Volts) ........................................................ 10
Voltage Input Range (30 Volts) ....................................................... 12
Voltage Input Range (50 Volts) ....................................................... 14
Current Input Range (55 mA) .......................................................... 16
Current Output Range (24 mA) ....................................................... 18
Ambient Temperature Channel ....................................................... 21
Calibrate External Ranges .................................................................... 22
Pressure ......................................................................................... 22
Service ................................................................................................. 24
Approved Service Agents .............................................................. 24
Returned Goods Procedure ........................................................... 25
Safety Precautions (Returned Goods) ...................................... 25
Tables
Table 1 - Internal/External Pressure Transducer Verification ................. 26
Table 2 - Voltage Input Calibration Tolerances (Standard models) ........ 27
Table 3 - Current Input Calibration Tolerances ...................................... 28
Table 4 - Current output Calibration Tolerances .................................... 29
Table 5 - Voltage Input Calibration Tolerances (IS models only) ............ 27
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K235 Issue No. 5
DPI 61X Series
Calibration Procedures
INTRINSIC SAFETY CONDITIONS OF USE
This instrument is designed to be intrinsically safe when operated in accordance with
the ATEX Certification document and schedule (see Appendix 2 of K249).
ATEX Certificate of Conformity
No. BAS02ATEX1174X
The Electrical Equipment Certification Service, notified body No. 600, in accordance
with Article 9 of the Council Directive 94/9/EC of 23rd March 1975, certifies that this
equipment or protective system has been found to comply with the Essential Health
and Safety Requirements relating to the design and construction of equipment and
protective systems intended for use in potential explosive atmospheres given in Annex ll
to the Directive.
The examination and test results are recorded in confidential report Number,
02(C)0340, dated 12th June 2002
NOTE: Attention is drawn to Pages 3 and 4 of the Certificate of Conformity (see
Appendix 2, K249) for electrical connection parameters
SPECIAL CONDITION OF USE
The DPI 610 and DPI 615 IS Series Pressure calibrators are NOT capable of
withstanding the 500V r.m.s. electric strength test between the external connectors and
the frame of the apparatus as required by Clause 6.4.12 of EN50020 and this must be
taken into account when using the apparatus for input measurements in a system.
Compliance with the Essential Health and Safety has been assured by compliance
with:-
EN 50014: 1997 + Amdts 1 & 2 , EN 50020: 1994 and
EN 50284:1999
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K235 Issue No. 5
Calibration Procedures
DPI 61X Series
English
Shaded cursor keys indicate that a combination of these four keys,
Up, Down, Left and Right should be used to (e.g.) enter an alpha
numeric value or to select a function.
Indicates the ENTER key. Used to confirm an operation or a
selection. Shading indicates key operation.
Exit key, used to clear current menu selection and return to next
menu level above current level. Used as an escape key from current
operation. Shading indicates key operation.
Hardkey (total 7). Legend beside key symbol indicates function.
Shading indicates key operation.
Maximum Instrument Ratings
The following table shows the maximum measurement ratings of the standard instrument
which should not be exceeded. Pressure overrange (120% of FS) is indicated by the
pressure display flashing. Voltage or current overrange, causes either the voltage or current
display to flash.
General
This publication covers the calibration procedures for DPI 61X and its Portable Pressure
Calibrator/Indicator derivatives and should be read in conjunction with Druck Publications
K213 and K249 for DPI 610 models and K248 and K249 for DPI 615 models.
The following key symbols are used in the procedure diagrams which follow and are
repeated here (from K213), to allow this supplement to stand alone. Pages 1 to 7 of
K213, K239, K248 and K249 detail the operator controls and general information which is
relevant to all options of the instrument.
Note:
For the DPI 610 AERO version, when the AERO task is selected,the display
flashes if the voltage or current input overranges by 110% of the above maximum
values. The pressure display flashes at altitudes below -3000 ft and above
50,000 ft or at airspeeds greater than 600 kts,depending upon the mode selected.
,[30V dc (IS)]
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K235 Issue No. 5
DPI 61X Series
Calibration Procedures
General Procedures
The following general hints are provided as a guide to calibration procedures.
Do
Use high quality Repeatable and Linear pressure sources and allow adequate stabilisation
time before calibration (minimum 1 hour).
Conduct the calibration in a temperature and preferably, humidity controlled environment.
Recommended temperature is 21°C, ±2°C.
Use deadweight testers carefully and away from draughts.
Review and become familiar with the whole calibration procedure before commencing the
calibration process.
Ensure that the instrument is NOT set to BASIC mode. The Instruments calibration routines
are not accessible from this mode. If necessary, use the TASK key to select another mode
(e.g.) ADVANCED.
Calibration Protection
In order to protect against accidental loss,the calibration of this instrument is
protected by a PIN number. Initially, this PIN number is set to 4321. To prevent
unauthorised access to the calibration routines, it is recommended that this PIN
number should be changed at the earliest opportunity(refer to Page 8).
Introduction
The instrument is supplied by the manufacturer, complete with calibration certificate(s).
The re-calibration interval will depend on the total measurement uncertainty which is
acceptable for a particular application. A period of 12 months is recommended but this
may be influenced by many factors including conditions of service.
The DPI 61X is a very precise measuring instrument and the test equipment and conditions
of test must be suitable for the type of work. The use of a Class A compensated deadweight
tester is essential. The tests should be carried out in a controlled environment by a
competent, trained person.
If, when the accuracy of the instrument is checked, it is found to fall outside the specification,
calibration adjustment can be undertaken to compensate errors.
The manufacturer offers a comprehensive and, if required, UKAS accredited calibration
service.
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Calibration Procedures
DPI 61X Series
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Using the Calibration Menu
The calibration routines are selected from the SETTINGS menu as detailed on page 8.
The calibration routines are not accessible whilst the instrumement is in BASIC mode. If
necessary therefore,use the TASK key to select another mode (e.g.) ADVANCED before
attempting to access the CALIBRATION mode.
Calibration Check
Compare the instrument readings with a known standard. Any deviations between the
instrument and the standard should be noted, taking due account of the traceability
(accuracy to a National Standard). If these deviations exceed the published tolerance, or
any other suitable chosen performance standard, then the user may wish to carry out a
calibration adjustment.
It is recommended that measurements be checked at 0, 20, 40