40-2009 Tram Nap CNG - He Thong Do Nhien Lieu

8/10/2019 40-2009 Tram Nap CNG - He Thong Do Nhien Lieu

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TCCS T I U C H U N C S

TCCS 40 : 2009/PVNXut bn ln 1

KH THIN NHIN NN (CNG)

TRM NP NHIN LIU

HTHNGO NHIN LIU KH NN

CHO CC PHNG TIN GIAO THNG

Compressed natural gas (CNG) Refuelling station

Compressed gaseous fuel measuring systems for vehicles

H NI 2009


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Mc lc

Trang

Li ni u................................................................................................................................................4

1 Phm vi p dng .................................................................................................................................5

2

Ti liu vin dn ..................................................................................................................................5

3 Thut ngv nh ngha .....................................................................................................................5

3.1 Hthng o v cc thnh phn ca hthng ..............................................................................6

3.2 c tnh o lng.........................................................................................................................8

3.3 Thnghim v iu kin thnghim .........................................................................................10

3.4 Thit bin hoc in t ...........................................................................................................11

4 Yu cu chung ..................................................................................................................................12

4.1 Thnh phn ca hthng o......................................................................................................12

4.2

Thit bphtrv thit bbsung .............................................................................................13

4.3 Phm vi vn hnh .......................................................................................................................13

4.4 Sch..........................................................................................................................................14

4.5 Tnh thch hp ca cc thit bb sung......................................................................................15

5 Yu cu vo lng i vi cc hthng o v thit bo .............................................................16

5.1 Sai scho php ln nht v cc c tnh o lng khc...........................................................16

5.2 iu kin p dng cc sai scho php ln nht........................................................................17

6 Yu cu i vi thit bo v cc thit bphtrca hthng o...................................................17

6.1

Thit bo ...................................................................................................................................17

6.2 Thit bhin th............................................................................................................................18

6.3 Thit bt v0 ..........................................................................................................................18

6.4 Thit bbo gi ...........................................................................................................................19

6.5 My in .........................................................................................................................................19

6.6 Bnh ........................................................................................................................................20

6.7 Thit bt trc ........................................................................................................................20

6.8 My tnh ......................................................................................................................................21

7

Yu cu kthut i vi cc thit bin t......................................................................................21

7.1 Yu cu chung............................................................................................................................21

7.2 Thit bcp in..........................................................................................................................22

7.3 Thit bkim tra ..........................................................................................................................22

8 Ghi nhn v nim phong ...................................................................................................................25

8.1 Ghi nhn .....................................................................................................................................25

8.2 Thit bnim phong v tm dp du...........................................................................................26

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4

Li ni u

TCCS 40 : 2009/PVNc bin son da trn c s tham kho

tiu chun OIML TC 8/SC7 : 2000, Compressed gaseous fuel

measuring systems for vehicles.

TCCS 40 : 2009/PVN do Vin Du kh Vit Nam v Cng ty Ch

bin v Kinh doanh cc sn phm kh bin son, Tp on Du kh

Quc gia Vit Nam cng b.


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T I U C H U N C S TCCS 40 : 2009/PVN

Kh thin nhin nn (CNG) Trm np nhin liu

Hthng o nhin liu kh nn cho cc phng tin giao thng

Compressed natural gas (CNG) Refuelling station

Compressed gaseous fuel measuring systems for vehicles

1 Phm vi p dng

1.1 Tiu chun ny quy nh cc yu cu vkthut v o lng p dng i vi cc hthng o

nhin liu kh thin nhin nn (CNG) cho cc phng tin giao thng. Tiu chun ny khng p dng

cho cc hthng o kh ha lng.

1.2 Cc h thng o trong tiu chun ny c dng cho vic np nhin liu cho cc phng tin

giao thng ng b, tu nhv my bay. Tiu chun ny c thp dng cho tu ho.

1.3 Tiu chun ny p dng cho tt ccc hthng o c thit bo c nh ngha trong 3.1.1 (o

lin tc), bt knguyn tc o ca thit bo hoc ng dng ca chng.

1.4 Tiu chun ny khng cn trspht trin ca cng nghmi. Tiu chun ny c xy dng

cho cc hthng o theo cng nghmi nht cung cp cc schkhi lng. Nu cng nghmi cho

schbng cc n vo khc th tiu chun ny phi c sa i.

2 Ti liu vin dnCc ti liu vin dn sau y l cn thit khi p dng tiu chun ny. i vi cc ti liu vin dn ghi

nm cng bth p dng bn c nu. i vi cc ti liu vin dn khng ghi nm cng bth p

dng phin bn mi nht, bao gm ccc bn sa i (nu c).

TCVN 6165 : 1996,o lng hc. Thut ngchung v cbn.

3 Thut ngv nh ngha

Trong tiu chun ny sdng cc thut ngv nh ngha sau:

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3.1 Hthng o v cc thnh phn ca hthng

3.1.1

Thit bo

Thit bc dng o lin tc, nhv hin thlng kh qua bchuyn i o ti iu kin o.

CH THCH: Thit bo bao gm ti thiu bchuyn i, my tnh (gm thit bhiu chnh hoc iu chnh nu c) v thit b

hin th.

3.1.2

Bchuyn i o

Bphn ca thit bo thc hin vic chuyn i lu lng kh o c thnh cc tn hiu truyn ti

my tnh. Bchuyn i o c ththot ng hoc sdng ngun in bn ngoi.

CH THCH: Bchuyn i o bao gm cm bin dng hoc i lng.

3.1.3

My tnh

Bphn ca thit bo tip nhn cc tn hiu ra tbchuyn i v c thtcc thit bo kt hp,

bin i chng v, nu thch hp, lu tr cc kt quo trong b nhcho n khi c s dng.

Ngoi ra, my tnh c thtruyn tn hiu vo ra vi thit bngoi vi.

3.1.4

Thit bhin th

Bphn ca thit bo hin thlin tc cc kt quo.

CH THCH: My in cung cp schti thi im kt thc php o khng phi l thit bhin th.

3.1.5

Thit bphtr

Thit bc dng thc hin chc nng ring, lin quan trc tip n vic bsung chi tit, truyn

hoc hin thcc kt quo.

Cc thit bphtrchnh l:

Thit bt v0;

Thit bhin thlp li;

My in;

Bnh;

Thit bbo gi;

Thit bbo tng;

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Thit bt trc.

CH THCH: Thit bphtrc thhoc khng tun theo kim nh o lng hp php theo chc nng ca thit btrong h

thng o hoc theo cc quy nh ca nh nc.

3.1.6

Thit bbsung

Bphn hay thit b, khng phi thit bph tr, c yu cu m bo o chnh xc hoc lm

thun tin cho cc hot ng o, hoc c thbng mt cch no tc ng n php o.

Cc thit bbsung chnh l:

Blc;

Thit bsdng cho im chuyn;

Thit bchng xoy;

ng rnhnh hoc nhnh ng ph;

Cc van, ng mm.

3.1.7

Hthng o

Hthng bao gm thit bo v tt ccc thit bphtrcng thit bbsung.

3.1.8

Hthng o nhin liu kh nn cho phng tin giao thng

Hthng o c dng cho vic np nhin liu kh nn cho cc phng tin giao thng. Kty,

hthng thit bny c gi n gin l hthng o.

3.1.9

Thit bt trc

Thit bcho php la chn i lng o v tng dng dng kh ti im kt thc php o i lng chn.

CH THCH:i lng t trc c thl khi lng hoc gi trtra tng ng.

3.1.10

Thit biu chnh

Thit bc lp trong thit bo, chcho php thay i ng cong sai ssong song vi chnh n,

vi mc ch a cc sai strong gii hn sai scho php ln nht.

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n gin ha cch vit, mt vi c tnh trong tiu chun lin quan ti vic so snh vlng (v d: skhc nhau gia

kt qu thu c ti mt siu kin xc nh v kt qu thu c cc iu kin chun) vi sai scho php ln nht.

Trong trng hp ny, hin nhin l sdng sai stuyt i cho php ln nht, kt hp vi sai stng i cho php ln nht.

3.2.5

i lng o nhnht ca hthng o

Khi lng kh nhnht m php o c thchp nhn vmt o lng i vi hthng .

CH THCH: Trong cc hthng o dng cho phn phi th khi lng nhnht ny cn c coi l lng phn phi nhnht.

3.2.6

lch khi lng quy nh nhnht

Gi trtuyt i ca sai scho php ln nht i vi lng o nhnht hthng o.

3.2.7

lch gi trquy nh nhnht

Gi trphi trtng ng vi lch khi lng quy nh nhnht.

3.2.8

Sai slp li

Gi trchnh lch gia kt quln nht v nhnht ca php o lin tip cho cng mt lng c

thc hin di cng cc iu kin.

3.2.9

Sai scbn

Sai sca hthng o sdng di cc iu kin chun.

3.2.10

Sai scbn ban u

Sai scbn ca hthng o c xc nh trc tt ccc php thchc nng.

3.2.11

Sai li

Skhc nhau gia sai sca schv sai scbn ca hthng o.

3.2.12

Sai li ng k

i vi khi lng, sai li m ln sai li ln hn gi trln nht ca hai gi trsau:

1/10 ln ca sai scho php ln nht i vi hthng o v khi lng o;

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Gi trlch khi lng quy nh nhnht.

i vi gi trphi tr, gi trtng ng vi sai li ng kca khi lng.

CH THCH: Gi n vkhng c php c sai li. Cc sai li di y khng c xem l sai li ng k:

Cc sai li pht sinh tcc nguyn nhn xy ra ng thi v c lp vi nhau gy ra trong thit bo hoc cc thit b

kim tra;

Cc sai li l cc bin i schtm thi m khng thgii thch, lu trhoc chuyn thnh kt quo;

Cc sai li dn n vic khng ththc hin bt k php o no.

3.2.13

bn

Khnng ca hthng o gic tnh thc hin qua thi ksdng, i vi cc mc ch in t.

3.3 Thnghim v iu kin thnghim

3.3.1

i lng nh hng

i lng khng phi l i tng ca php o nhng nh hng n gi trca php o hoc sch

ca hthng o.

3.3.2

Yu tnh hng

i lng nh hng c gi trtrong phm vi cc iu kin vn hnh nh mc xc nh ca hthng

o, nh quy nh trong tiu chun ny.

3.3.3

Nhiu

i lng nh hng c gi trnm ngoi iu kin vn hnh nh mc xc nh ca hthng o.

CH THCH: i lng nh hng l nhiu nu cc iu kin vn hnh nh mc khng c xc nh i vi i lng

nhiu .

3.3.4

iu kin vn hnh quy nh

iu kin sdng, a ra khong gi trca i lng nh hng, di iu kin ny cc c tnh o

lng trong phm vi sai scho php ln nht.

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3.3.5

iu kin chun

Tp gi trxc nh ca cc yu tnh hng c cnh m bo sso snh ln nhau cc kt

quo.

3.3.6

Thnghim chc nng

Thnghim dng xc minh h thng o ang thnghim (EUT) c th thc hin cc chc nng

ca n.

3.3.7

Thnghim bn

Thnghim dng xc minh thit bo hoc hthng o c thduy tr cc c tnh chc nng ca

n qua thi ksdng.

3.3.8

Dy

Mt hoc nhiu bcha thnghim c ni vi nhau thnh hthng kh nhiu on. Cc on ny

vn hnh cc mc p sut khc nhau trong hthng np c gn hoc sdng thit biu khin

tun t.

3.3.9

Thit biu khin tun t

Thit bcho php chuyn tdy ny sang dy kia. Thit bny c th lp trong hthng o hoc l

mt bphn ca trm np.

3.4 Thit bin hoc in t

3.4.1

Thit bin t

Thit bsdng cc cm in tv thc hin mt chc nng cth. Thit bin tthng c sn

xut thnh tng bphn ring v c thc thnghim c lp.

CH THCH: Thit bin t, nhnh ngha trn, c thl cc hthng o hon chnh hoc mt bphn ca hthng o,

c bit l cc thit bc cp trong cc iu t3.1.1 n 3.1.5.

3.4.2

Cm in tBphn ca thit bin t, dng cc chi tit in tv c chc nng c thnhn bit c chnh n.

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3.4.3

Thnh phn in t

Thc thvt l nhnht dng dn ht in thoc l trng trong cht bn dn, kh hoc trong

chn khng.

3.4.4

Thit bkim tra

Thit bc kt hp trong hthng o v c khnng pht hin sai li ng k.

CH THCH: Kim tra thit btruyn tn hiu xc minh rng tt ccc thng tin truyn c thit bthu tip nhn y .

3.4.5

Thit bkim tra tng

Thit bkim tra hot ng khng cn n scan thip ca ngi vn hnh.

3.4.6

Thit bkim tra tng lin tc (kiu P)

Thit bkim tra tng vn hnh trong sut qu trnh o.

3.4.7

Thit bkim tra tng khng lin tc (kiu I)

Thit bkim tra tng vn hnh ti thiu mt ln lc bt u hoc lc kt thc mi ln o.

3.4.8

Thit bcp in

Thit bcung cp cho cc thit bin tnng lng in yu cu, sdng mt hoc nhiu ngun

in mt chiu hoc xoay chiu.

4 Yu cu chung

4.1 Thnh phn ca hthng o

Bn thn thit bo khng phi l mt hthng o. Hthng o ti thiu phi gm c:

Thit bo;

im chuyn;

Hthng dn kh c cc c tnh ring cn c ch .

Hthng o c thc lp vi cc thit bphtrv thit bbsung khc (xem 4.2).

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Nu mt vi thit bo c dng thc hin cc php o ring c cc bphn phbin (my tnh,

blc, v.v) th mi thit bo phi c xem l mt hthng o.

Mi hthng o chc mt thit bo.

4.2 Thit bphtrv thit bbsung

4.2.1 Thit bphtrc thl mt phn ca my tnh hoc thit bo, hoc c thl thit bngoi vi

c ni qua mt cng giao din vi my tnh.

Thng thng cc thit b ph tr ny l ty chn. Tuy nhin, tiu chun ny c thbt buc hoc

ngn cm mt vi thit btrong s. Ngoi ra, cc quy nh ca nh nc hoc quc tc thbt

buc c mt vi trong cc thit bny lin quan ti vic sdng ca cc hthng o.

4.2.2 Khi tiu chun ny hoc theo quy nh ca nh nc bt buc p dng cc thit bphtrny

th chng c xem l cc bphn khng ththiu ca hthng o, cc thit bny phi c kim

tra v phi p ng cc yu cu ca tiu chun ny.

4.2.3 Khi cc thit b ph tr cha c kim nh, ngi ta phi xc nhn rng cc thit b ny

khng nh hng n shot ng chnh xc ca hthng o. Hthng phi tip tc vn hnh chnh

xc v cc chc nng o lng phi khng bnh hng khi thit bngoi vi c ni hoc tho ra.

Ngoi ra, cc thit bny phi c phn ghi ch c thnhn thy r rng bi ngi sdng chrng

chng cha c kim nh khi cc thit bny hin thkt quo c thnhn thy i vi ngi s

dng. Phn ghi ch ny phi c trong mi ti liu in ra cho khch hng.

4.2.4 Theo nh ngha, thit bbsung c lp trong hthng o phi khng nh hng n c

tnh o lng ca thit bo.

4.3 Phm vi vn hnh

4.3.1 Phm vi vn hnh ca hthng o c xc nh bi cc c tnh sau:

i lng o nhnht;

Khong o c gii hn bi lu lng nhnht (Qmin) v lu lng ln nht (Qmax);

p sut kh ln nht, Pmax;

p sut kh nhnht, Pmin;

Nu thch hp, bn cht v cc c tnh ca kh c o;

Nhit kh ln nht, Tmax;

Nhit kh nhnht, Tmin;

Loi mi trng.

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Loi mi trng c thkhc nhau i vi cc thit bca hthng o, quy nh rng mi thit bc

sdng theo loi mi trng ca bn thn n.

4.3.2 i lng o nhnht ca hthng o phi c dng 1 10n, 2 10nhoc 5 10ntheo n v

khi lng cho php, trong n l snguyn m, nguyn dng hoc bng 0.

i lng o nhnht phi thomn cc iu kin sdng ca h thng o. Trcc trng hp

ngoi lth hthng o khng c sdng cho cc i lng o nhhn i lng o nhnht.

Hthng o c lu lng ln nht khng ln hn 30 kg/min phi c i lng o nhnht khng vt

qu 2 kg.

H thng o c lu lng ln nht ln hn hoc bng 30 kg/min nhng khng ln hn 100 kg/min

phi c i lng o nhnht khng vt qu 5 kg.

4.3.3 Phm vi o phi thomn cc iu kin sdng ca hthng o. Phm vi o c thit ksao

cho lu lng nm gia lu lng ln nht v nhnht, ngoi tr ti thi im bt u v kt thc

php o hoc trong lc gin on.

Trong iu kin sdng thng thng, hthng o phi khng thphn phi cc i lng o cc

lu lng nhhn lu lng nhnht. Phm vi o ca hthng o phi nm trong phm vi o ca

mi bphn ca hthng.

Tsgia lu lng ln nht v nhnht phi ti thiu l 15.

4.3.4 Hthng o c sdng dnh ring cho o kh c cc c tnh trong phm vi vn hnh, nh

quy nh trong chng chph duyt mu. Phm vi vn hnh ca hthng o nm trong phm vi o ca

mi bphn cu thnh, c bit l thit bo.

4.4 Sch

4.4.1 Hthng o phi c thit bhin thkhi lng kh o.

Tuy nhin, theo cc cquan c thm quyn ca nh nc, schkhi lng c thc bsung s

chvthtch, nhit lng hoc i lng khc vi iu kin schr rng v khng sai lch i vi

lng thc t. Hn na, trong trng hp ny, hschuyn i c sdng chuyn i khilng thnh schthcp phi c hin thmt trc hthng o. Chc php chuyn i cc

sai s lm trn.

Nu hthng c lp thit bbo gi th:

Cc schn gi v gi trphi trchlin quan ti khi lng;

Cc schny chc hin thkhi hin thkhi lng.

4.4.2 Khi lng c hin ththeo n vkilogam. K hiu hoc tn n vphi xut hin ngay bn

cnh sch.

Nu c thp dng, th thtch hoc cc i lng khc phi c hin thbng n vo c php

ca cquan c thm quyn vo lng.

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4.4.3 Mt hthng o c thc nhiu thit bhin thcng mt lng o. Tng hthng o phi p

ng cc yu cu ca tiu chun ny nu c kim nh. Gi trchia ca cc schphi ging nhau.

4.4.4 i vi bt ki lng o no lin quan n cng mt php o, th cc schc cung cp

bi cc thit bo phi khng c sai khc nhau.

4.4.5 c php sdng cng mt thit bhin thcho cc schca cc hthng o (hthng cthit bhin ththng dng), quy nh rng khng c sdng ng thi hai hthng o, v hthng

o cho schc nhn bit r rng.

4.4.6 Gi trchia phi c dng 1 10n, 2 10nhoc 5 10nn vkhi lng c php, trong

n c thl nguyn m, nguyn dng hoc bng 0.

Gi trchia phi bng hoc nhhn mt na lch khi lng xc nh nhnht.

Tuy nhin cn trnh cc gi trchia khng quan trng. iu ny khng p dng i vi cc sch

gi tr.

4.4.7 Khi c lin quan, cc quy nh lin quan ti cc schkhi lng cng p dng cho cc sch

gi trbng tn hiu xung, v cho cc schthcp bng cc i lng khc.

4.5 Tnh thch hp ca cc thit bbsung

4.5.1 Cc hthng o phi lp mt im chuyn.im chuyn ny c t pha sau thit bo.

4.5.2 Khng c lp mt thit bno c thlm lch hng dng kh pha sau thit bo.

4.5.3 Hai hoc nhiu im chuyn phn phi c thc lp cnh v c vn hnh ng thi

hoc lun phin nhau, sao cho bt kschuyn hng kh ti vtr ngoi trcc u tip nhn np

dnh khng thc thc hin ddng hoc ddng nhn thy. Cc bin php nhvy bao gm,

v d, mng chn vt l, cc van hoc cc schc thtrng thy nhn bit r cc im chuyn no

ang hot ng, v cc tn hiu gii thch, nu cn thit.

4.5.4 Khi chsdng mt im chuyn trong khi phn phi v sau khi im chuyn c thay th,

phi ngn cm vic phn phi ktip cho n khi thit bhin th c t v0.

Khi sdng ng thi hoc lun phin hai hoc nhiu im chuyn v sau khi im chuyn sdng

c thay th, th phi ngn cm vic phn phi ktip cho n khi thit bhin th c t

v0. Ngoi ra, thit kphi p ng cc yu cu trong 4.5.3.

4.5.5 Hthng c thit km bo rng i lng o c phn phi. c bit, nu ng mm

pha sau ca thit bo c thbgim p gia hai ln phn phi, trng hp ny phi c hiu chnh

c hthng hoc tng p li trc khi tnh.

D l nguyn l vn hnh no, c bit l cc thnh phn cu to ca ng mm hoc im chuyn,

trong cc iu kin o ti nht, th khi lng o nhng cha c phn phi phi nhhn hoc bngmt na lch khi lng xc nh nhnht.

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CH THCH: Mc ch ca quy nh l khng cho php lch hthng. Yu cu ny c xc minh bng kim tra thit k,

thnghim v/hoc tnh ton.

4.5.6 Nu c ri ro m cc iu kin cung cp c thvt qu lu lng Qmaxca thit bo, th phi

lp thit bgii hn dng chy. Thit bny c thbt kn dng chy.

4.5.7 p kphi c lp cnh trn hthng o kim tra Pminv Pmax.

5 Yu cu vo lng i vi cc hthng o v thit bo

5.1 Sai scho php ln nht v cc c tnh o lng khc

5.1.1 Khng xt ti trng hp 5.1.3, sai s tng i cho php ln nht ca cc s ch khi

lng, dng hoc m, khi ph duyt mu l:

1 % ca lng o cho chring thit bo;

1,5 % ca lng o cho ton bhthng o.

5.1.2 Sai stng i cho php ln nht ca cc schkhi lng, dng hoc m, ti kim nh

ln u hoc kim nh nh kv khi cc kim tra ny c thc hin ti ni sdng di cc iu

kin vn hnh nh mc l 2 % ca i lng o cho ton bhthng o.

Cc gi trc quy nh trong 5.1.1 cn c p dng ti kim nh ln u c thc hin trong

phng thnghim.

5.1.3 Cc sai scho php ln nht p dng cho i lng o nhnht bng hai ln cc gi trtngng c nu trong 5.1.1.

Bi vy lch khi lng xc nh nhnht (Emin) cho hthng o c xc nh bi cng thc:

Emin= 3 Mmin/ 100

Trong

Mminl i lng o nhnht c dng c quy nh trong 4.3.2.

CH THCH:lch khi lng xc nh nhnht l sai stuyt i cho php ln nht.

5.1.4 Bt ki lng o no c thth ln ca sai scho php ln nht (sai s tuyt i) cho

ton bhthng o khng c nhhn lch khi lng xc nh nhnht.

5.1.5 i vi bt ki lng o no bng hoc ln hn 1 000 gi trchia th sai s lp li ca

thit bo phi khng ln hn 0,6 %.

5.1.6 Trong phm vi vn hnh, cc thit bo phi c chnh lch gia sai scbn ban u v

sai ssau khi thbn bng hoc nhhn 1 %.

Yu cu vtnh lp li p dng sau khi thbn.

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5.2 iu kin p dng cc sai scho php ln nht

5.2.1 Cc sai scho php ln nht p dng cho tt ccc loi kh, nhit v p sut kh, v cc lu

lng m hthng hoc thit bo c ph duyt.

Hthng o hoc thit bo phi thomn tt ccc yu cu m khng cn iu chnh hoc thay i

trong qu trnh kim tra lin quan.

5.2.2 Khi c nu trong chng chph duyt mu, vic kim tra hthng o hoc thit bo dng

o kh c thc thc hin vi khng kh (hoc vi cht lng khc). Trong trng hp ny v nu

cn thit, chng chph duyt mu a ra khong nhhn i vi cc sai scho php ln nht sao

cho cc sai scho php ln nht ny thomn i vi kh.

6 Yu cu i vi thit bo v cc thit bphtrca hthng o

6.1 Thit bo

6.1.1 Phm vi vn hnh

Phm vi vn hnh ca thit bo c xc nh ti thiu bi cc c tnh sau:

i lng o nhnht;

Khong o c gii hn bi lu lng nhnht (Qmin) lu lng ln nht (Qmax);

p sut kh ln nht, Pmax;

Nhit kh ln nht, Tmax;

Nhit kh nhnht, Tmin.

Khong nhit phi trong khong 10 oC n 40 oC hoc ti thiu tm 10 oC n 50 oC.

6.1.2 Yu cu vo lng

Xem 5.

6.1.3 Kt ni gia cm bin dng vi thit bhin th

Cc kt ni gia cm bin dng v thit bhin thphi tin cy v, i vi cc thit bin tphi bn

vng, ph hp vi 7.1.3 v 7.3.2.

6.1.4 Thit biu chnh

Cc thit bo c thc lp mt thit biu chnh cho php thay i tsgia khi lng hin

thv khi lng thc ca dng kh qua thit bo bng mt lnh n gin.

Khi thit biu chnh ny thay i tsny khng lin tc th cc gi trlin tip ca tsphi khng

chnh lch nhau ln hn 0,001.Nghim cm vic iu chnh bng nhnh phca thit bo.

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6.1.5 Thit bhiu chnh

Cc thit bo c thc lp cc thit bhiu chnh. Cc thit bhiu chnh ny lun c xem l mt

bphn hp nht ca thit bo. Do ton byu cu p dng cho thit bo, c bit l sai scho

php ln nht c quy nh trong mc 5, c thp dng cho khi lng c hiu chnh.

Trong vn hnh o thng thng, khng c hin thkhi lng cha c hiu chnh.

Mc ch ca thit bhiu chnh l gim sai sn gn khng nht.

CH THCH: Quy nh ca nh nc ngn cm sdng thit bny hiu chnh sai sca thit bo ti gi trgn 0, ngay

ckhi cc gi trny nm trong phm vi sai scho php ln nht.

Chng chph duyt mu c thquy nh khnng ca cc thng skim tra c thl cn thit cho

schnh xc ti thi im kim tra thit bhiu chnh.

Thit bhiu chnh phi khng cho php hiu chnh lch c on trc lin quan ti thi gian hoc

khi lng.

Cc thit bo kt hp, nu c, phi tun theo cc tiu chun nh nc hoc quc tc thp dng.

chnh xc ca chng phi p ng cc yu cu i vi thit bo, theo quy nh trong 5.3.

Cc thit bo kt hp phi c lp vi cc thit bkim tra, theo quy nh trong 7.3.6.

6.2 Thit bhin th

6.2.1 Cc hthng o phi c lp thit bhin ths. Du ca sthp phn phi r rng.

6.2.2 Khi lng phi hin thlin tc trong qu trnh o.

6.2.3 Chiu cao ca chstrong thit bhin thphi ln hn hoc bng 10 mm.

6.3 Thit bt v0

6.3.1 Hthng o phi c lp mt thit bchnh thit bhin thkhi lng v0.

6.3.1.1 Thit bt v0 phi khng cho php bt ksthay i kt quo no c hin thbi thit

bhin thkhi lng (ngoi trlm cho kt qukhng hin thv hin thv0).

6.3.1.2 Khi vic t v0 bt u th thit bhin thkhi lng phi khng thhin thkt qukhc

vi kt quca php o va c thc hin, cho n khi vic t v0 hon thnh.

Hthng o khng tht gi trv0 trong khi o.

6.3.2 Nu hthng cn bao gm cthit bbo gi th thit bhin thny phi c lp thit bt

v0.

Thit bt v0 ca thit bbo gi v thit bhin thkhi lng phi c thit ksao cho khi t

v0 thit bhin thny stng t v0 thit bhin thkia.

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6.3.3 Nu hthng o c kt ni vi my in th bt khot ng in no phi khng ththc hin

trong qu trnh o v hn na chc thphn phi sau khi thc hin t v0. Tuy nhin, hot ng

in phi khng lm thay i i lng c hin thtrn thit bhin th.

6.3.4 Nu hthng o c thit ksao cho vic ghi khi lng c thxut hin m khng c bt k

lu lng hiu quno, th thit bphi ghi li lu lng r rng ny v b trvo kt quo.

6.4 Thit bbo gi

6.4.1 Thit bhin thkhi lng c thc bsung thm mt thit bbo gi hin thcn gi v

gi trphi tr.

n vtin tsdng hoc k hiu phi xut hin ngay vng ln cn ca sch.

6.4.2 n gi la chn phi hin thbi thit bhin thtrc khi bt u php o. n gi phi c

thiu chnh c. Vic thay i n gi c thc thc hin trc tip trn hthng o hoc thng

qua thit bngoi vi.

n gi hin thlc bt u thc hin php o phi c hiu lc trong ton bgiao dch bn. n gi

mi chc hiu lc ti thi im php o mi c thc hin.

Nu n gi c t tthit bngoi vi th khong thi gian gia hin thn gi mi v trc khi bt

u thc hin php o tip theo ti thiu l 5 s.

6.4.3 c php lm trn chcc sai slin quan ti st quan trng nht ca gi trphi tr.

6.5 My in

6.5.1 Khi lng c in phi c biu din bng mt trong cc n v cho php i vi s ch

khi lng.

Cc chs, n vsdng hoc k hiu v du thp phn, nu c, phi c in trn mt tm phiu.

6.5.2 My in cng c thin thng tin nhn dng php o nhdy s, ngy thng, nhn dng hthng

o, loi kh, ...

Nu my in c ni vi nhiu hthng o th my in cn phi in snhn dng ca hthng lin quan.6.5.3 Nu my in cho php lp li lnh in trc khi bt u phn phi mi th cc bn sao phi c

ng du r rng, v dnhin bn sao.

6.5.4 My in c thin, ngoi lng c o, gi trtng ng hoc gi trny v n gi.

My in cng c thchin gi trphi tr(khng c khi lng) khi ni vi cthit bhin thkhi lng

v thit bbo gi tr, chai c thnhn thy bi ngi mua.

6.5.5 Cc my in cng phi tun theo cc yu cu trong 7.3.5.

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6.6 Bnh

6.6.1 Hthng o c thc lp mt bnhlu cc kt quo cho n khi cn sdng hoc

lu githng tin ca cc giao dch thng mi, cung cp chng ctrong trng hp xy ra tranh

ci. Cc thit bsdng c thng tin lu trc xem l c trong bnh.

6.6.2 Mi trng m d liu lu trphi thch hp m bo d liu khng bsai lch di iukin lu trbnh thng. Phi c bnhlu trcho bt kng dng ring no (i vi cc h

thng o trn ng, phi lu trtrong thi gian 3 thng i vi sdng thng thng).

6.6.3 Khi bnhy, c php xo dliu nhkhi cc iu kin di y thomn:

D liu bxo trong cng trnh tnhtrnh tghi v cc quy tc c thit lp i vi ng dng

ring phn tng ng;

Vic xo c thc hin sau khi vn hnh bng tay c bit.

6.6.4 Vic ghi nh phi bng cch khng th thay i c cc gi tr lu tr trong s dng

thng thng.

6.6.5 Cc bnhphi c gn vi cc thit bkim tra theo 7.3.5. Mc ch ca thit bkim tra l

m bo cho dliu lu trtng ng vi d liu do my tnh cung cp v dliu khi phc li

tng ng vi dliu lu tr.

6.7 Thit bt trc

6.7.1 i lng la chn c t trc bng cch vn hnh thit bhin thshin thi lngny.i lng t trc phi c hin thtrc khi bt u php o.

6.7.2 Khi c thquan st ng thi cc strn thit bhin thca thit bt trc v cc strn

thit bhin thkhi lng th cc sny phi c thphn bit vi nhau mt cch r rng.

6.7.3 Trong qu trnh o, schca i lng la chn c thginguyn hoc a v0. Tuy nhin

c thhin thgi trt trc trn thit bhin thkhi lng bng vn hnh c bit vi gii hn l

gi trny phi c thay bng schkhi lng bng 0 trc khi thc hin php o.

6.7.4 Trong cc iu kin vn hnh bnh thng, gi trchnh lch gia i lng t trc v i

lng c hin thbi thit bhin thkhi lng ti im kt thc php o, phi khng vt qu

lch khi lng xc nh nhnht.

6.7.5 Cc i lng ci t trc v i lng c hin thbi thit bhin thkhi lng phi cng

n v.n vny (hoc k hiu ca n v) phi c nh du trn thit bt trc.

6.7.6 Gi trchia ca thit bt trc phi bng vi gi trchia ca thit bhin th.

6.7.7 Cc thit bt trc c thlp mt thit bcho php dng nhanh dng kh khi cn thit.

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6.7.8 Hthng o c thit bbo gi cng c thc gn vi thit bt trc gi tr, thit bny

dng dng kh khi i lng phn phi tng ng vi gi trt trc. Cc yu cu trong 6.7.1 n

6.7.7 p dng tng t.

6.8 My tnh

6.8.1 Sai scho php ln nht, dng hoc m, trn cc schi lng kh p dng cho cc my

tnh khi chng c kim tra ring bng 0,05 % gi trthc.

6.8.2 Tt ccc thng so cn thit hnh thnh cc schtheo kim nh o lng hp php,

nhn gi, bng tnh, a thc hiu chnh,... phi c trong my tnh ti thi im bt u thc hin

php o.

6.8.3 My tnh c thc lp vi cc cng giao tip cho php kt ni thit bngoi vi. Khi sdng

cc cng giao tip ny, thit bphi tip tc hot ng chnh xc v cc chc nng o lng khng b

nh hng.

7 Yu cu kthut i vi cc thit bin t

7.1 Yu cu chung

7.1.1 Cc hthng o in tphi c thit kv chto sao cho sai sca hthng khng vt

qu sai scho php ln nht theo quy nh trong 5.1 di cc iu kin vn hnh nh mc.

7.1.2 Cc hthng o in tphi c thit kv ch to sao cho, khi hthng tip xc vi ccnhiu th:

Khng xut hin sai li ng k; hoc

Cc sai li ng kc pht hin v c tc ng bi cc thit bkim tra.

Quy nh ny c thp dng ring cho:

Tng nguyn nhn ring bit gy ra sai li ng k; v/ hoc

Tng bphn ca hthng o.

7.1.3 Cc yu cu trong 7.1.1 v 7.1.2 phi c thomn bn vng. Cho mc ch ny, cc h

thng o in tphi c trang bcc thit bkim tra c quy nh trong 7.3.

7.1.4 Cc hthng o in tphi c thi gian trgia gi tro v gi trhin thphi khng vt

qu 500 ms.

7.1.5 Mu ca hthng o c coi l tun theo cc yu cu trong 7.1 nu hthng o vt qua cc

php thnghim v kim tra c quy nh trong kim nh o lng.

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7.2 Thit bcp in

7.2.1 Hthng o phi c trang bmt thit bcp in khn cp cho php:

m bo an ton tt ccc chc nng o trong qu trnh xy ra li cp ngun chnh; hoc

Cc dliu ti thi im xy ra li dn ti ngng dng kh c lu li v c thhin thtrn thit b

hin thtun theo kim nh o lng hp php trong thi gian ln cho php kt thc giao dch

bn hin ti.

Gi trtuyt i ca sai sln nht cho php i vi schkhi lng, trong trng hp thhai, c

tng 5 % ca i lng o nhnht.

7.2.2 Trong trng hp li dn ti ngng dng cp, hthng o phi m bo thi gian hin thphi:

Lin tc v tng ti thiu 15 min ngay sau khi mt ngun cp in chnh, hoc

Tng thi gian ti thiu l 5 min trong mt hoc vi khong thi gian c iu khin bng tay trongvng 1 h sau khi bli.

CH THCH: Nu thnghim trong qu trnh ph duyt mu l cn thit xc nhn rng hthng o p ng yu cu ny

th thit bphi c cung cp ngun in thng thng trong vng 12 h trc khi thnghim. Trc khi cung cp in, c

qui (nu c cung cp) c thkhng c np.

Ngoi ra, cc hthng o phi c thit ksao cho vic phn phi bgin on khng thtip tc

sau khi thit bcung cp in c thit lp li nu li ngun ko di hn 15 s.

7.3 Thit bkim tra

7.3.1 Hot ng ca cc thit bkim tra

Vic pht hin cc sai li ng kbi cc thit bkim tra phi dn ti cc tc ng sau:

Tng hiu chnh sai li; hoc

Chdng thit bc sai li, khi hthng o tip tc tun theo cc quy nh m khng cn c thit b;

Dng dng cp.

7.3.2 Thit bkim tra cho bchuyn i o

Mc ch ca cc thit bkim tra ny l xc minh sc mt ca bchuyn i tn hiu, vn hnh

chnh xc v chnh xc ca vic truyn dliu.

Cc thit bkim tra ny phi l kiu P v vic kim tra phi thc hin ti cc khong thi gian khng

vt qu thi gian o ca i lng kh bng vi lch khi lng xc nh nhnht.

Trong qu trnh ph duyt mu v kim nh ln u phi kim tra chnh xc ca cc chc nng ca

thit bkim tra:

Bng cch tho kt ni ca bchuyn i tn hiu; hoc

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Bng cch ngt mt trong cc thit bpht xung ca bcm bin; hoc

Bng cch ngt ngun in ca bchuyn i tn hiu.

7.3.3 Thit bkim tra cho my tnh

Mc ch ca cc thit bkim tra ny l xc minh rng hthng tnh ton hot ng chnh xc v

m bo tnh hiu lc ca cc php tnh ton.

Khng c phng php c bit no c yu cu chrng cc thit bkim tra hot ng chnh xc.

7.3.3.1 Kim tra hot ng ca hthng tnh ton phi l kiu P hoc I. Trong trng hp sau, vic

kim tra phi thc hin ti thiu 5 min/ln trong qu trnh phn phi nhng ti thiu 1 ln trong sut qu

trnh phn phi.

Mc ch ca vic kim tra xc minh rng:

7.3.3.1.1 Cc gi tr ca tt c cc chng trnh v d liu c lu tr lu di l chnh xc,bng cch:

Tnh tng tt ccc m chng trnh v dliu v so snh vi m tng c gi trcnh;

Cc bt chn ldng v ct (LRC v VRC);

Kim tra dtha theo chu k;

Sao lu dliu c lp;

Lu d liu di dng M ha an ton, v dnhc bo v bi phng php kim tra mtng, cc bit chn ldng v ct.

7.3.3.1.2 Tt ccc qui trnh truyn v lu dliu bn trong lin quan n kt quo c thc hin

chnh xc, bng cch l :

Thtc c ghi;

Chuyn i v chuyn i li cc m;

Sdng m ha an ton (Kim tra m tng, bt chn l);

Sao lu dliu.

7.3.3.2 Vic kim tra tnh hiu lc ca cc tnh ton phi l kiu P. Kim tra ny bao gm kim tra gi

trchnh xc ca tt ccc d liu o mi khi cc d liu ny c lu gibn trong hoc c

truyn ti thit bngoi vi qua mt giao din. Vic kim tra ny c thc thc hin bi phng php

bt chn l, kim tra m tng hoc sao lu d liu. Ngoi ra, hthng tnh ton phi c cung cp

phng php kim sot tnh lin tc ca chng trnh tnh ton.

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7.3.4 Thit bkim tra cho thit bhin th

Mc ch ca thit bkim tra ny l xc minh rng cc schscp c hin thv chng tng

ng vi dliu c cung cp bi my tnh. Ngoi ra, thit bcn nhm xc minh sc mt ca cc

thit bhin th, khi cc thit bny c ththo ra c. Vic kim sot c thc thc hin hoc

theo khnng xy ra thnht trong 7.3.4.2 hoc l khnng xy ra th2 trong 7.3.4.3.7.3.4.1 Trong qu trnh xc minh phi xc nh rng thit bkim tra ca thit bhin thang lm vic,

hoc l:

Bng cch tho tt choc mt phn thit bhin th; hoc

Bng cch tc ng m phng li hin th, nhsdng mt nt kim tra.

7.3.4.2 Khnng u tin l kim sot tng ton bthit bhin th. Thit bkim tra ca thit b

hin thl kiu P. Tuy nhin, c thl kiu I nu schscp c cung cp bi mt thit bkhc ca

hthng o hoc nu schny c thc xc nh ddng tcc schscp khc.

V D: Trong trng hp c mt thit bbo gi, thit bny c thxc nh gi trphi trtheo khi lng v n gi.

Cc cch kim tra c thbao gm:

i vi cc thit bhin thsdng cc si pht quang hoc cc diode pht quang, o dng trong

cc si pht quang;

i vi cc thit bhin thsdng ng pht quang, o hiu in thhthng ng;

i vi cc thit bhin thsdng cc l chn sng in t, kim tra tc ng ca mi l chn sng;

i vi cc thit bhin thsdng cc tinh thlng a thnh phn, vic kim tra u ra ca hiu

in thiu khin ca cc on ng v ca cc in cc thng thng, pht hin smt lin kt

hoc ngn mch gia cc mch iu khin.

7.3.4.3 Khnng xy ra thhai, mt mt kim tra tng cc mch in c sdng cho thit

bhin thngoi trcc mch hin thchuyn ng v mt khc kim tra hin th.

Thit bkim tra tng ca cc mch in tc sdng cho thit bhin thl kiu P. Tuy nhin,

thit bny c thl kiu I nu schscp c cung cp bi thit bkhc ca hthng o, hoc

nu schc thc xc nh ddng tcc schscp khc.

V D: Trong trng hp c mt thit bbo gi, thit bny c thxc nh gi trphi trtheo khi lng v n gi.

Thit bkim tra hin thphi cung cp kim tra bng mt ton bhin thv hin thphi p ng yu

cu sau:

Hin thtt ccc on (kim tra stm nu thch hp);

trng tt ccc on (kim tra trng);

Hin th0.

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Mi bc tun tphi ko di ti thiu 0,75 s.

Thit bkim tra bng mt ny phi l kiu I nhng khng bt buc i vi scdn ti cc tc ng

c miu ttrong 7.3.1.

7.3.5 Cc thit bkim tra cho cc thit bphtr

Thit bphtr(thit b lp li, my in, thit btphc v, bnh,...) c cc schscp phi bao

gm thit bkim tra kiu I hoc P. Mc ch ca thit bkim tra ny l xc minh sc mt ca

thit bphtr, khi n l thit bcn thit, v xc minh vic truyn dliu chnh xc tmy tnh n

thit bphtr.

c bit, vic kim tra my in nhm mc ch m bo rng cc iu khin in tng ng vi cc d

liu c truyn bi my tnh. Ti thiu cc yu tsau phi c kim tra:

C giy;

Cc mch iu khin in t(ngoi trcc mch truyn ng ca chnh ccu in).

Trong khi ph duyt mu v thc hin cc xc minh khc phi kim tra rng thit bkim tra ca my in

ang hot ng bi mt tc ng m phng mt li in, nhsdng mt nt kim tra.

Khi tc ng ca thit bkim tra l cnh bo, th cnh bo ny phi c a ra trn hoc bi thit b

phtrlin quan.

7.3.6 Cc thit bkim tra cho cc dng co kt ni

Cc dng co kt ni phi bao gm mt thit bkim tra kiu P. Mc ch ca thit bkim tra ny lm bo rng tn hiu c a ra bi cc dng ckt ni ny trong khong o c nh trc.

V D:

Truyn dn bn dy dng cho cc bcm bin in tr;

Cc thit blc tn scho cc thit bo ttrng;

iu khin dng in truyn ng cho cc bcm bin p sut c dng t4 mA n 20 mA.

8 Ghi nhn v nim phong

8.1 Ghi nhn

8.1.1 Mi hthng o, bphn o, hoc hthng phtr ph duyt phi c nhn, t mt vtr

r rng v khng ty xo c trn mt ca thit bhin thhoc trn cc tm dliu c bit bao gm

cc thng tin sau:

Du sng ch c ph duyt;

Du hiu nhn bit hoc thng hiu ca nh chto; Tn gi do nh chto chn, nu c;

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Sl v nm chto;

Cc c tnh xc nh trong 4.3.1 v 6.1.1.

CH THCH: Cc c tnh c hin thphi l cc c tnh sdng thc t, nu chng c bit khi tm dliu c gn.

Khi chng khng c bit, th cc c tnh c hin thl cc c tnh cho php trong chng chph duyt mu.

Tuy nhin, nhit nhnht v ln nht ca kh phi c xut hin trn tm d liu chkhi chng

thay i tng ng tm 10 oC n 50 oC.

Trong mi trng hp, i lng o ti thiu ca hthng o phi m bo ngi sdng c th

nhn thy r rng trn bt kmt thit bhin thno trong qu trnh o.

Khi h thng o c thc vn chuyn m khng cn tho, cc nhn hiu yu cu i vi mi b

phn c thc kt hp trn mt tm bng.

8.1.2 Bt k thng tin, nhn hoc sno do tiu chun ny hoc c thdo chng chph duyt

sng chquy nh phi c nhn thy r trn mt ng hca thit bhin thhoc trong phm vi gn.

Cc nhn trn mt ca thit bhin thca thit bo l mt bphn ca hthng o phi khng c

khc vi nhn trn tm dliu ca hthng o.

8.2 Thit bnim phong v tm dp du

8.2.1 Yu cu chung

Vic nim phong thng thng c thc hin bng phng php kp ch. Tuy nhin, cc kiu nim

phong khc c php i vi cc thit bdvhoc khi cc nim phong ny m bo tnh hp nhtnhcc nim phong in t.

Trong mi trng hp, cc nim phong phi c thtip cn ddng.

Vic nim phong phi c thc hin trn tt ccc bphn ca hthng o khng c bo vcn

thit chng li cc tc ng c thnh hng n chnh xc php o.

Cc thit bnim phong phi ngn chn c sthay i cc thng s lin quan ti kt quo (c

bit l cc thng scho iu chnh v chuyn i).

Mt tm tn, c xem l tm dp du, dp cc du kim nh, phi c nim phong hoc gn c

nh trn khung ca hthng o. Tm ny c thkt hp vi tm dliu ca hthng o, nh

nu iu 8.1.

8.2.2 Cc thit bnim phong in t

8.2.2.1 Khi vic tip cn cc thng stham gia xc nh cc kt quo khng c bo vbi cc

thit bnim phong ckh th vic bo vphi p ng cc quy nh sau:

8.2.2.1.1 Vic tip cn chcho php i vi ngi c thm quyn, bi thit bc bit (kha cng, );

CH THCH: Duy nht m skhng c xem l p ng quy nh ny.

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27

8.2.2.1.2 Phi c thnhc ti thiu 100 lnh truy cp. Bn ghi d liu phi bao gm ngy, thi

gian v cc yu tc tnh nhn din ngi c thm quyn truy cp (xem 8.2.2.1.1) v gi trca cc

thng sc thay i. Vic lu gicc truy cp ny phi c m bo ti thiu 2 nm, nu khng

bghi trong trng hp truy cp sau. Nu phi xo truy cp trc cho php thc hin mt bn

ghi dliu mi th bn ghi dliu cnht phi c xo.

8.2.2.2 i vi cc hthng o c cc bphn c thc tho ri khi bphn khc bi ngi s

dng v c ththay thcho nhau c, th cc quy nh sau phi c p ng:

8.2.2.2.1 Khng thtruy cp c cc thng stham gia xc nh kt quo qua cc im tho tr

khi thomn cc quy nh trong 8.2.2.1;

8.2.2.2.2 Vic can thip ti bt kthit bno c thnh hng n chnh xc phi c ngn chn

bi cc bin php an ton in tv xl dliu hoc nu khng th bng cc phng php ckh.

8.2.2.3 i vi cc hthng o c cc bphn c thc tho ri khi bphn khc bi ngi sdng v khng ththay thnhau c, th p dng cc quy nh trong 8.2.2.2. Hn na, cc hthng

o ny phi c lp cc thit bkhng cho php chng hot ng nu cc bphn khc khng c

kt ni theo ng cu hnh ca nh chto.

CH THCH: Cn ngn cm vic tho ri m khng c php ca ngi sdng, v dnhbi mt thit bngn chn bt

kphp o no sau khi tho v lp li.

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40-2009 Tram Nap CNG - He Thong Do Nhien Lieu

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