IEC 60770-2 pdf download

IEC 60770-2 pdf download Transmitters for use in industrial-process control systems – Part 2: Methods for inspection and routine testing
1 scope and object
This part of lEC 60770 is applicable to transmitters，which have either a standard analogueelectric current output signal or a standard pneumatic output analogue signal in accordancewith IEC 60381-1 or lEC 60382.The tests detailed herein may be applied to transmitterswhich have other output signals,provided that due allowance is made for such differences.
For the method of inspection and routine testing of the intelligent transmitters seeIEC 60770-3.
For certain types of transmitters,where the sensor is an integral part, other specific lEC orIso standards may need to be consulted (e.g. for chemical analyzers, flow-meters, etc.)
This standard is intended to provide technical methods for inspection and routinetesting of transmitters， for instance, for acceptance tests or after repair. For a fullevaluation，IEC 60770-1 and/or lEC 60770-3， respectively for analogue or intelligenttransmitters shall be used.
Quantitative criteria for acceptable performance should be established by agreementbetween manufacturer and user.
By agreement the tests need not be carried out by an accredited laboratory.
2Normative references
The following referenced documents are indispensable for the application of this document.For dated references，only the edition cited applies. For undated references,the latestedition of the referenced document (including any amendments) applies.
IEC 60050-300，International Electrotechnical Vocabulary – Electrical and electronicmeasurements and measuring instruments – Part 311: General terms relating tomeasurements – Part 312: General terms relating to electrical measurements – Part 313:Types of electrical measuring instruments – Part 314: Specific terms according to the typeof instrument
IEC 60381-1:1982，Analogue signals for process control systems – Part 1: Direct currentsignals
IEC 60382:1991,Analogue pneumatic signal for process control systemsIEC 60410:1973, Sampling plans and procedures for inspection by attributes
IEC 60770-1:1999，Transmitters for use in industrial-process control systems – Part 1:Methods for performance evaluation
IEC/TS 62098:2000, Evaluation methods for microprocessor-based instruments
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-300, in the IEC 61 298 series and the following apply.
3.1
acceptance test
test proving to the user that the device complies with the performance specifications as they appear in the contract
3.2
variable
quantity or condition whose value is subject to change and can usually be measured EXAMPLE temperature, flow rate, speed, signal, etc.
3.3
signal
physical variable of which one or more parameters carry information about one or more variables represented by the signal
3.4
range
region of the values between the lower and upper limits of the quantity under consideration
3.5
span
algebraic difference between the upper and lower limit values of a given range
3.6
test procedure
statement of the tests to be carried out and the conditions for each test, agreed between the manufacturer, the test laboratory and the purchaser/user before the evaluation starts
3.7
maximum measured error
largest positive or negative value of error of the upscale or downscale value of each point of measurement