accuracy limits

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  • 8/10/2019 Accuracy Limits

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    1. Accuracy limits

    1.1 Thermometer resistors Pt100

    Accuracy limits for resistors Pt100

    TemperatureoC

    Class A Class B Class 1/3B

    0 /0"15 /0"06 /0"% /0"1. /0"1 /0"0

    100 /0"%5 /0"1% /0" /0"%0 /0".6 /0"1

    .00 /0"55 /0".0 /1"% /0" /0" /0"16

    %00 /0"75 /0".7 /1" /0"6 /0"6 /0".1

    00 /0"25 /0"%% /."% /0"72 - -

    500 /1"15 /0"% /." /0"26 - -

    600 /1"%5 /0"% /%"% /1"06 - -

    700 - - /%" /1"17 - -

    00 - - /"% /1". - -

    200 - - /"6 /1"% - -

    1.2 Thermocouples

    Type

    Class 1 Class 2 Class 3

    Temperatureran&e 'C(

    Temperatureran&e 'C(

    Temperatureran&e 'C(

    Temperatureran&e 'C(

    Temperatureran&e 'C(

    Temperatureran&e 'C(

    41.5 to %50 /0"00 ( t 41%% do %50 /0"0075 ( t -.00 do -67 /0"015 ( t

    3ype E-0 to 4%75 /1"5 -0 do 4%%% /."5 -167 do 40 /."5

    4%75 to 400 /0"00 ( t 4%%% do 4200 /0"0075 ( t -.00 do -167 /0"015 ( t

    3ype -0 to 4%75 /1"5 -0 do 4%%% /."5 - -

    4%75 to 750 /0"00 ( t 4%%% do 750 /0"0075 ( t - -

    3ype -0 to 4%75 /1"5 -0 do 4%%% /."5 -167 do 40 -

    4%75 to 41000 /0"00 ( t 4%%% do 41.00 /0"0075 ( t -.00 do -167 /0"015 ( t

    3ype 480 to 41100 /1"0 0 do 4600 /1"5 - -

    1100 to 1600 /9140"00% t ;1100

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    2. )ynamic parameters

    2.1 Time of response 't(

    3ime of response 9t=& this is a time& which thermometer needs& after temperature step change& to show specifiedpercentage of a change" 3ime of response 9t0"5=& this is the time& after which the thermometer show 50> of value of

    the temperature step change" 3here can 'e specified times of response for 10> 9t0"1= or for 20> 9t0"2="

    3imes of response can 'e specified for circulated air or water"

    3. *ire confi&uration.

    3.1 Confi&uration sym+ols

    .-wire %-wire -wire

    *a'le resistance *u: @ A ( 0"0175< $ s

    where:

    A @ ca'le length 9m=

    s @ ca'le diameter 9mm.=

    0"0175 @ *u material resistance

    3hermometer response

    3ime

    Norm EN- 607514. specify the following ca'le configuration:

    3hermometers with only .-wire configuration& which are used with . outer connecting ca'les only&should not 'e applied to class p?t%"%"1 EN-607514.

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    3.2,esistance thermometers connection

    Connectin& -ia&ram of terminal +loc ith " connections Confi&uration 3ire 2Pt100

    2Pt1003p

    %. Pro-ucts uality controlEach manufactured product is Buality controlled in our la'oratory in compliance with norm reBuirements"

    3he Buality control of manufactured 'y us platinum resistors was also made 'y *ertified Aa'oratory CC--06701 of Audwig 8chneider Desstechni? m'F"

    %.1 ,esistance thermometer uality control3his procedure is made for the following sensors: Pt-100$1"%50& Ni-100$1"617& *u-100$1".6 and also for of

    unusual resistance in 0o* sensors Pt-50& Pt-500& Ni-.00& *u-50& itp"< and resistance thermometers eBuippedwith these sensors"

    3here is also possi'ility of chec?ing the parameters of eBuipment used for measuring resistance and voltage ofsensors"

    %.2 Thermocouple uality control

    Procedure is done for the following thermocouples Pth10-Pt 8