HK INSTRUMENTS DPT-Ctrl-MOD Phau Ntawv Qhia Cov Cuab Yeej Cuab Yeej

Taw qhia

Ua tsaug rau koj xaiv HK Instruments DPT-Ctrl-MOD series huab cua tuav tswj nrog qhov sib txawv siab lossis airflow transmitter. Lub DPTCtrl-MOD series PID controllers yog engineered rau lub tsev automation nyob rau hauv lub HVAC / R kev lag luam. Nrog lub built-in maub los ntawm DPT-Ctrl-MOD nws muaj peev xwm tswj tau qhov siab tsis tu ncua lossis ntws ntawm cov kiv cua, VAV systems lossis dampers. Thaum tswj huab cua ntws, nws muaj peev xwm xaiv cov chaw tsim khoom siv kiv cua lossis ib qho kev ntsuas ntsuas uas muaj K-tus nqi.

Lub DPT-Ctrl-MOD suav nrog lub Input davhlau ya nyob twg uas tso cai rau kev nyeem ntawv ntawm ntau lub cim xws li qhov kub thiab txias lossis tswj relays dhau Modbus. Lub input davhlau ya nyob twg muaj ib tug input channel tsim los txais 0-10 V, NTC10k, Pt1000, Ni1000 / (-LG), thiab BIN IN (muaj peev xwm hu dawb) teeb liab.

APPLICATIONS

DPT-Ctrl-MOD series cov khoom siv feem ntau siv hauv HVAC / R tshuab rau:

• Tswj qhov sib txawv siab los yog huab cua ntws hauv huab cua tuav tshuab
• VAV applications
• Tswj chaw nres tsheb qhov chaw nres tsheb tso kiv cua

CEEB TOOM

• Nyeem cov lus qhia no ua tib zoo ua ntej sim teeb tsa, ua haujlwm lossis ua haujlwm ntawm lub cuab yeej no.
• Tsis ua raws li cov ntaub ntawv kev nyab xeeb thiab ua raws li cov lus qhia tuaj yeem ua rau tus kheej raug mob, tuag thiab / lossis khoom puas tsuaj.
• Txhawm rau kom tsis txhob muaj hluav taws xob poob siab lossis kev puas tsuaj rau cov khoom siv, tshem tawm lub zog ua ntej kev teeb tsa lossis kev pabcuam thiab tsuas yog siv cov xaim nrog rwb thaiv tsev ntsuas rau tag nrho cov cuab yeej ua haujlwm vol.tage.
• Txhawm rau kom tsis txhob muaj hluav taws kub thiab / lossis tawg tsis txhob siv nyob rau hauv qhov chaw uas muaj hluav taws kub los yog tawg.
• Khaws cov lus qhia no rau yav tom ntej siv.
• Cov khoom no, thaum ntsia, yuav yog ib feem ntawm ib tug engineered system uas nws specifications thiab kev ua tau zoo yam ntxwv tsis tsim los yog tswj los ntawm HK Instruments. Review daim ntawv thov thiab lub teb chaws thiab hauv zos cov lis dej num kom paub tseeb tias qhov kev teeb tsa yuav ua haujlwm tau zoo thiab nyab xeeb. Siv tsuas yog cov kws paub txog thiab paub txog kev txhim kho cov cuab yeej no.

SPECIFICATIONS

Kev ua tau zoo

Qhov tseeb (los ntawm kev siv siab):

Qauv 2500:
Siab <125 Pa = 1% + ± 2 Pa
Siab> 125 Pa = 1% + ± 1 Pa
Qauv 7000:
Siab <125 Pa = 1.5% + ± 2 Pa
Siab> 125 Pa = 1.5% + ± 1 Pa
(Cov lus qhia tseeb muaj xws li: qhov tseeb dav dav, linearity, hysteresis, kev ruaj ntseg ntev, thiab rov ua yuam kev)
Tshaj siab
Pov thawj siab: 25 kPa
Kev kub siab: 30 kPa
Zero point calibration:
Phau ntawv pushbutton lossis Modbus
Lub sij hawm teb:
1.0-20s, xaiv tau ntawm cov ntawv qhia zaub mov lossis Modbus

Kev sib txuas lus

Txoj Cai: MODBUS hla Serial Kab
Kis hom: RTU
Kev sib txuas lus: RS485
Byte hom ntawv (11 ntsis) hauv RTU hom:
Coding system: 8-ntsis binary
Bits ib byte:
1 pib bit
8 cov ntaub ntawv me me, tsawg kawg me ntsis xa ua ntej
1 ntsis rau parity
1 nres bit
Baud tus nqi: xaiv tau hauv kev teeb tsa
Modbus chaw nyob: 1–247 chaw nyob xaiv tau hauv cov ntawv qhia zaub mov

Technical Specifications

Media compatibility: 
Cov cua qhuav los yog cov pa uas tsis ua phem
Controller parameter (xaiv tau ntawm cov ntawv qhia zaub mov thiab Modbus):
Setpoint 0…2500 ( qauv 2500)
0…7000 ( qauv 7000)
P-band 0…10 000
Kuv-tau 0…1000
D-factor 0…1000
Cov ntsuas siab (xaiv tau ntawm cov ntawv qhia zaub mov):
Pa, kPa, mbar, inWC, mmWC, psi
Flow units (xaiv tau los ntawm cov ntawv qhia zaub mov):
Ntim: m3 / s, m3 / h, cfm, l / s
Ceev: m/s, ft/min
Kev ntsuas qhov ntsuas:
MEMS, tsis muaj ntws los ntawm
Ib puag ncig:
Ua haujlwm kub: -20…50 ° C
Kev ntsuas kub tau them ntau yam 0…50 ° C
Cia kub: -40…70 ° C
Humidity: 0-95% rH, tsis condensing

Lub cev

Qhov Loj:
Case: 102.0 x 71.5 x 36.0 mm
Qhov hnyav:
150 g ib
Mounting:
2 txhua 4.3 hli ntsia hlau qhov, ib qho slotted
Khoom siv:
Case: ABS
Khob: PC
Siab inlets: tooj dag
Kev tiv thaiv tus qauv:
IP54
Zaub
2-kab zaub (12 cim / kab)
Kab 1: Kev taw qhia ntawm kev tswj cov zis
Kab 2: Kev ntsuas siab los yog huab cua ntws, xaiv tau ntawm cov ntawv qhia zaub mov
Yog tias cov tswv yim raug xaiv, kab 2 tseem qhia cov ntaub ntawv nkag (exampkub)
Loj: 46.0 x 14.5 mm
Kev sib txuas hluav taws xob:
4 + 4 txoj haujlwm caij nplooj ntoos hlav-loaded terminals
Hlau: 0.2-1.5 mm2 (16-24 AWG)
Cable nkag:
Lub cev muaj zog: M16
Kov qhov siab: 16mm
Siab fittings
5.2 hli barbed tooj dag
+ Kev kub siab
- Tsawg siab

Hluav taws xob

Muab voltage:
24 VAC lossis VDC, ± 10%
Kev siv zog:
<1.0 W
Output signal:
ntawm Modbus
Tswj cov zis:
0-10 V
Input signal:
0-10 V, NTC10k, Pt1000, Ni1000/(-LG) los yog BIN IN

Kev sib haum xeeb

Ua tau raws li qhov yuav tsum tau ua rau:

EMC: CE 2014/30/EU UKCA SI 2016/1091
RoHS: 2011/65/EU SI 2012/3032
WEEE: 2012/19/EU SI 2013/3113

SCHEMATICS

INSTALLATION

1. Mount lub cuab yeej hauv qhov chaw xav tau (saib kauj ruam 1).
2. Qhib lub hau thiab xa cov kab hluav taws xob los ntawm kev tshem tawm cov kab mob thiab txuas cov xov hlau mus rau lub davhlau ya nyob twg thaiv (saib kauj ruam 2).
3. Cov cuab yeej tam sim no npaj rau kev teeb tsa.

CEEB TOOM! Siv lub zog tsuas yog tom qab lub cuab yeej siv tau zoo.

Kauj Ruam 1: mount lub cuab yeej 

1. Xaiv qhov chaw mounting (kab, phab ntsa, vaj huam sib luag).
2. Siv lub cuab yeej ua tus qauv thiab kos cov ntsia hlau qhov.
3. Mount nrog tsim nyog screws.

KAUJ RUAM 2: TXOJ CAI DIAGRAMS

Rau kev ua raws li CE, yuav tsum muaj cov kab thaiv thaiv kab thaiv kom zoo.

1. Unscrew lub strain nyem thiab xa cov cable(s).
2. Txuas cov xov hlau raws li qhia hauv daim duab 2a thiab 2b.
3. Tighten lub strain nyem.

Nws yog pom zoo kom siv shielded twisted khub cable rau Modbus cabling. Cov ntaub thaiv npog yuav tsum tau earthed tsuas yog nyob rau hauv ib qho chaw, feem ntau, thaum kawg ntawm lub ntsiab cable.

Kauj ruam 3: CONFIGURATION

1. Nias lub pob xaiv rau ob vib nas this los qhib cov ntawv qhia zaub mov.
2. Kev kho xoom point. Yog xav paub ntxiv, saib Kauj Ruam 4.
   
3. Xaiv hom kev ua haujlwm ntawm tus maub los: PRESSURE lossis FLOW.
   • Xaiv PRESSURE thaum tswj qhov sib txawv siab.
     Mus rau point 3.1.
   • Xaiv FLOW thaum tswj huab cua ntws.
     Mus rau point 3.2.0.
     
     Thaum xaiv chav tswj PRESSURE
     Xaiv chav tsev siab rau tso saib thiab tso zis: Pa, kPa, mbar, inWC lossis mmWC. Tom qab ntawd mus rau point 4.
     
     Thaum xaiv chav tswj FLOW
     Xaiv hom kev ua haujlwm ntawm tus maub los
     Xaiv Chaw Tsim Tshuaj thaum txuas DPT-Ctrl-MOD rau lub kiv cua nrog ntsuas ntsuas kais.
     Xaiv cov kev sojntsuam Common thaum siv DPT-Ctrl-MOD nrog ib qho kev ntsuas kev sojntsuam uas ua raws li cov qauv:
     
     Yog tias Kev Tshawb Fawb Kev Xaiv: xaiv cov ntsuas ntsuas uas siv hauv cov qauv (aka Formula unit) (ie l/s)
     
     Xaiv K-tus nqi
     a. Yog tias cov chaw tsim khoom xaiv hauv kauj ruam 3.2.0:
     Txhua tus kiv cua muaj qhov tshwj xeeb K-tus nqi. Xaiv tus K-tus nqi los ntawm cov kiv cua tsim cov kev qhia tshwj xeeb.
     b. Yog tias Common sojntsuam xaiv hauv kauj ruam 3.2.0:
     Txhua qhov kev sojntsuam muaj qhov tshwj xeeb K-tus nqi. Xaiv tus K-tus nqi los ntawm kev sojntsuam cov chaw tsim khoom tshwj xeeb.
     Muaj K-tus nqi ntau: 0.001…9999.000
     
     Xaiv chav nyob rau kev tso saib thiab tso zis: ntws ntim: m3 / s, m3 / h, cfm, l / s Velocity: m / s, f / min
     
4. Xaiv qhov chaw nyob rau Modbus: 1…247
   
5. Xaiv tus baud tus nqi: 9600/19200/38400.
   
6. Xaiv qhov parity me ntsis: Tsis muaj / Txawm / Khib
   
7. Xaiv lub sij hawm teb: 1…20 s.
   
8. Xaiv qhov Tso Tawm Tsau (OFF / 0…100%), (saib kauj ruam 7 Tsau Tso Tawm).
9. Xaiv hom input.
   Passive kub sensors: PT1000 / Ni1000 / Ni1000LG / NTC10k
   Voltage input: VINPUT
   Hloov cov tswv yim: BIN IN
   Tsis muaj tswv yim: TSIS TAU
   
10. Xaiv qhov teeb tsa ntawm tus maub los (SP2 tsuas yog muaj nrog BIN IN hloov cov ntaub ntawv):
    1. Yog tias CONTROL UNIT raug xaiv PRESSURE.
       
    2. Yog tias CONTROL UNIT raug xaiv FLOW.
       
11. Xaiv lub TEMP COMP (OFF/ON), (saib kauj ruam 6, Kev them nyiaj kub kub).
12. Xaiv cov band proportional raws li koj daim ntawv thov specifications.
    
13. Xaiv ib qho kev nce ntxiv raws li koj qhov kev thov tshwj xeeb.
    
14. Xaiv lub sij hawm derivation raws li koj daim ntawv thov specifications.
    
15. Nias lub pob xaiv kom tawm hauv ntawv qhia zaub mov.
    

KAUJ RUAM 4: TSIS TXAUS SIAB POINT ADJUSTMENT

Nco tseg! Nco ntsoov xoom lub cuab yeej ua ntej siv. 

Muab voltage yuav tsum tau txuas nrog ib teev ua ntej qhov kev hloov kho xoom yog nqa tawm. Nkag mus los ntawm Modbus lossis los ntawm nias khawm.

1. Tshem ob lub raj los ntawm lub siab inlets + thiab -.
2. Qhib cov ntawv qhia zaub mov los ntawm nias lub pob xaiv rau 2 vib nas this.
3. Xaiv Zero sensor los ntawm nias lub pob xaiv.
   
4. Tos kom txog thaum lub LED kaw thiab tom qab ntawd teeb tsa cov raj dua rau lub siab inlets.

KAUJ RUAM 5: INPU SIGNAL CONFIGURATION

Input signals tuaj yeem nyeem dhau Modbus ntawm DPT-MOD RS485 interface.

Teeb liab	Qhov tseeb rau kev ntsuas	Kev daws teeb meem
0… 10 V	<0,5%	0,1%
NTC 10 k	<0,5%	0,1%
Pt 1000	<0,5%	0,1%
Ni1000 / (-LG)	<0,5%	0,1%
BIN IN (muaj peev xwm hu tau dawb)	/	/

Cov jumpers yuav tsum tau teeb tsa raws li cov lus qhia hauv qab no thiab tus nqi
yuav tsum tau nyeem los ntawm txoj cai sau npe.

KAUJ RUAM 6: KEV TXIAV TXIM SIAB

Cov cuab yeej suav nrog kev them nyiaj rau sab nraum zoov uas tuaj yeem qhib tau los ntawm cov ntawv qhia zaub mov. Thaum qhib thiab kaw qhov ntsuas kub sab nraum zoov, qhov teeb tsa zoo ntawm lub cuab yeej yuav raug hloov kho kom them nyiaj rau cov cua txias sab nraum zoov. Qhov no yuav ua rau kev txuag hluav taws xob. rau cua txias sab nraum zoov. Qhov no yuav ua rau kev txuag hluav taws xob.

Yog tias qhov kub thiab txias tau qhib, lub cuab yeej yuav linearly txo qhov
Tus neeg siv qhov chaw teeb tsa (REF FLOW / REF PRESSURE) los ntawm 0% rau TC DROP% ntawm TC START TE rau TC STOP TE.

Cov cuab yeej tswj hwm qhov sib txawv ntawm +5 ° C ntawm qhov pib thiab nres kub. Qhov pib kub yuav tsum siab tshaj qhov ntsuas kub.

1. Txuas thiab teeb tsa lub ntsuas cua kub sab nraum zoov. Saib kauj ruam 5.
2. Qhib qhov kub thiab txias.
   
3. Teem qhov kub pib rau kev them nyiaj
   
4. Teem lub ntsuas kub rau kev them nyiaj.
   
5. Teem lub siab tshaj plaws poob percentage rau kev them nyiaj.
   

KAUJ RUAM 7: Tsau tso zis

Tsau tso zis teeb tsa tuaj yeem qhib tau los teeb tsa kev tswj cov zis rau tus nqi preset. Lub hom phiaj tseem ceeb ntawm qhov kev ua haujlwm no yog txhawm rau txhawm rau hloov pauv huab cua li qub thiab cov davhlau ya nyob twg yam tsis muaj DPT-Ctrl cuam tshuam rau cov kav dej siab lossis cua ntws. Nws tseem tuaj yeem pab daws teeb meem kev teeb tsa.

1. Txhawm rau pab kom cov zis ruaj khov, txav mus rau nws txoj haujlwm hauv cov ntawv qhia zaub mov
   
2. Nias lub khawm xaiv thiab xaiv qhov xav tau cov khoom tso tawm tas li. Cov zis tam sim no yuav nyob ntawm tus nqi no mus ib txhis. Nyob rau hauv ib txwm ua haujlwm hom (pom hauv qab), kab sab sauv ntawm cov zaub yuav pom FIXED xx % los qhia tias cov zis tau tsau.
   
3. Txhawm rau ua kom cov kev tswj hwm ib txwm tso tawm thiab lov tes taw cov zis tas li, txav mus rau nws txoj haujlwm, xaiv nws thiab teeb tsa tus nqi rau OFF.
   Tsau tso zis muaj nuj nqi kuj muaj nyob ntawm Modbus. (4 × 0016: Overdrive nquag, 4 × 0015: Overdrive tus nqi)

Kauj ruam 8: Siv 2SP-feature

2SP (setpoint) yog ib qho feature nrog binary input los xaiv ntawm ob tus neeg siv tau qhov teeb tsa. Qhov xav tau setpoint tuaj yeem xaiv tau, piv txwv liample, nrog lub sij hawm txhua lub lim tiam, tig hloov lossis hloov daim npav tseem ceeb.

1. Xaiv INPUT => BIN IN.
   
2. Teem cov jumpers raws li qhia ib sab los txiav txim siab lub teeb liab tawm tswv yim.
   

Kauj ruam 9: MODBUS REGISTERS

Function code 03 – Nyeem tuav sau npe, Function code 06 – Sau ib leeg register, Function code 16 – Sau ntau lub registers

Sau npe	Parameter piav qhia	Hom ntaub ntawv	Tus nqi	Ntau yam
4 × 0001 hli	Chaw tsim tshuaj paus	16bit ib	0… 8	0 = FläktWoods 1 = Rosenberg 2 = Nicotra-Gebhardt 3 = Kev 4 = Ziehl-Abegg 5 = ebm-papst 6 = Gebhardt 7 = Nicotra 8 = Kev sojntsuam
4 × 0002 hli	Formula unit (yog cov chaw tsim khoom xaiv = kev sojntsuam)	16bit ib	0… 5	0=m3/s, 1=m3/h, 2=cfm, 3 = l/s, 4 = m/s, 5 = f/min
4 × 0003 hli	K-factor integral	16bit ib	0… 9999	0… 9999
4 × 0004 hli	K-factor decimal	16bit ib	0… 999	0… 999
4 × 0005 hli	Teb sijhawm	16bit ib	0… 20	0 Nws
4 × 0006 hli	PID tswj chav tsev	16bit ib	0… 1	0 = Siab, 1 = Flow
4 × 0007 hli	PID siab ref	16bit ib	-250… 2500 ( qauv 2500) -700… 7000 ( qauv 7000)	-250… 2500 ( qauv 2500) -700… 7000 ( qauv 7000)
4 × 0008 hli	PID flow ref integer	16bit ib	0… 30000	0… 30000
4 × 0009 hli	PID flow ref decimal	16bit ib	0… 999	0… 999
4 × 0010 hli	PID p nqi	16bit ib	0… 10000	0… 10000
4 × 0011 hli	PID thiab integer	16bit ib	0… 1000	0… 1000
4 × 0012 hli	PID thiab decimal	16bit ib	0… 99	0… 99
4 × 0013 hli	PID d integer	16bit ib	0… 1000	0… 1000
4 × 0014 hli	PID d decimal	16bit ib	0… 99	0… 99
4 × 0015 hli	Overdrive tus nqi	16bit ib	0… 100	0… 100%
4 × 0016 hli	Overdrive nquag	16bit ib	0… 1	0=Off, 1=Off
4 × 0017 hli	Kub them nyiaj	16bit ib	0… 1	0=Off, 1=Off
4 × 0018 hli	Temp. comp. pib TE	16bit ib	-45… 50	-45 ... 50 ° C.
4 × 0019 hli	Temp. comp. nres TE	16bit ib	-50… 45	-50 ... 45 ° C.
4 × 0020 hli	Temp. comp. poob ib feem	16bit ib	0… 99	0… 99%
4 × 0021 hli	Temp. comp. poob decimal part	16bit ib	0… 999	0.0… 0.999%
4 × 0022 hli	PID Siab Ref SP 1	16bit ib	-250… 2500 ( qauv 2500) -700… 7000 ( qauv 7000)	-250… 2500 ( qauv 2500) -700… 7000 ( qauv 7000)
4 × 0023 hli	PID Siab Ref SP 2	16bit ib	-250… 2500 ( qauv 2500) -700… 7000 ( qauv 7000)	-250… 2500 ( qauv 2500) -700… 7000 ( qauv 7000)
4 × 0024 hli	PID Flow Ref SP 1 integer	16bit ib	0… 30000	0… 30000
4 × 0025 hli	PID Flow Ref SP 1 decimal	16bit ib	0… 999	0… 999
4 × 0026 hli	PID Flow Ref SP 2 integer	16bit ib	0… 30000	0… 30000
4 × 0027 hli	PID Flow Ref SP 2 decimal	16bit ib	0… 999	0… 999
4 × 0028 hli	Flow unit (duab thiab PID SP)	16bit ib	0… 5	0=m3/s, 1=m3/h, 2=cfm, 3 = l/s, 4 = m/s, 5 = f/min

Function code 04 – Read input register 

Sau npe	Parameter piav qhia	Hom ntaub ntawv	Tus nqi	Ntau yam
3 × 0001 hli	Program version	16bit ib	0… 1000	100… 9900
3 × 0002 hli	Siab nyeem A	16bit ib	-250… 2500 ( qauv 2500) -700… 7000 ( qauv 7000)	-250… 2500 ( qauv 2500) -700… 7000 ( qauv 7000)
3 × 0003 hli	Kev tawm tswv yim 0…10 V	16bit ib	0… 100	0… 100%
3 × 0004 hli	Input PT1000	16bit ib	-500… 500	-50 ... + 50 ° C
3 × 0005 hli	Input Ni1000	16bit ib	-500… 500	-50 ... + 50 ° C
3 × 0006 hli	Cov tswv yim Ni1000-LG	16bit ib	-500… 500	-50 ... + 50 ° C
3 × 0007 hli	Input NTC 10k	16bit ib	-500… 500	-50 ... + 50 ° C
3 × 0008 hli	Flow m3/s	16bit ib	0… 10000	0 m100/s
3 × 0009 hli	Flow m3/h	16bit ib	0… 30000	0 m30000/h
3 × 0010 hli	Flow cfm	16bit ib	0… 30000	0… 30000 cfm
3 × 0011 hli	Flow l/s	16bit ib	0… 3000	0 l/s
3 × 0012 hli	Ceev m/s	16bit ib	0… 1000	0 m/s
3 × 0013 hli	Ceev f/min	16bit ib	0… 5000	0…5000 f/min

Function code 02 – Read input status 

Sau npe	Parameter piav qhia	Hom ntaub ntawv	Tus nqi	Ntau yam
1 × 0001 hli	Input: IB IN	Bit 0	0… 1	0=Off, 1=Off

Function code 05 - Sau ib kauj ruam 

Sau npe	Parameter piav qhia	Hom ntaub ntawv	Tus nqi	Ntau yam
0 x 0001	Zeroing muaj nuj nqi	Bit 0	0… 1	0=Off, 1=Off

RECYCLING/DISPOSAL

Cov khoom seem ntawm kev teeb tsa yuav tsum tau rov ua dua raws li koj cov lus qhia hauv zos. Cov khoom siv decommissioned yuav tsum raug coj mus rau qhov chaw rov ua dua tshiab uas tshwj xeeb hauv cov khoom siv hluav taws xob.

WARRANTY POLICY

Tus neeg muag khoom yog lub luag haujlwm los muab kev tiv thaiv tsib xyoos rau cov khoom xa tuaj txog cov khoom siv thiab kev tsim khoom. Lub sijhawm lav yog suav tias yog pib ntawm hnub xa khoom ntawm cov khoom. Yog tias muaj qhov tsis xws ntawm cov khoom siv raw lossis cov khoom tsis raug, tus neeg muag khoom yuav tsum ua, thaum cov khoom raug xa mus rau tus neeg muag khoom yam tsis muaj kev ncua lossis ua ntej lub sijhawm lav, kho qhov yuam kev ntawm nws qhov kev txiav txim siab los ntawm kev kho cov khoom puas. los yog los ntawm kev xa dawb rau tus neeg yuav khoom ib yam khoom tshiab tsis zoo thiab xa mus rau tus neeg yuav khoom. Tus nqi xa khoom rau kev kho raws li kev lees paub yuav raug them los ntawm tus neeg yuav khoom thiab tus nqi xa rov qab los ntawm tus muag khoom. Lub warranty tsis suav nrog kev puas tsuaj los ntawm kev sib tsoo, xob laim, dej nyab lossis lwm yam tshwm sim, kev hnav thiab tsim kua muag, kev siv tsis raug lossis tsis saib xyuas, kev siv tsis zoo, kev thauj khoom ntau dhau, kev cia khoom tsis raug, kev saib xyuas tsis raug lossis kev tsim kho, lossis kev hloov pauv thiab kev teeb tsa ua haujlwm tsis ua los ntawm cov tus neeg muag khoom. Kev xaiv cov khoom siv rau cov khoom siv ua rau corrosion yog tus neeg yuav khoom lub luag haujlwm, tshwj tsis yog tias muaj kev pom zoo raws cai. Yog tias cov chaw tsim khoom hloov cov qauv ntawm cov cuab yeej, tus neeg muag khoom tsis tas yuav tsum tau hloov pauv rau cov khoom siv uas twb tau yuav lawm. Kev thov rau kev lees paub yuav tsum kom tus neeg yuav khoom tau ua tiav nws txoj haujlwm raug tshwm sim los ntawm kev xa khoom thiab tau teev tseg hauv daim ntawv cog lus. Tus neeg muag khoom yuav muab qhov kev lees paub tshiab rau cov khoom uas tau hloov lossis kho tsis pub dhau lub warranty, txawm li cas los xij tsuas yog lub sijhawm tas sijhawm ntawm cov khoom qub lub sijhawm lav. Qhov kev lees paub suav nrog kev kho cov khoom siv lossis cov khoom siv tsis raug, lossis yog tias xav tau, ib feem tshiab lossis cov cuab yeej siv, tab sis tsis yog installation lossis pauv nqi. Tsis muaj qhov xwm txheej yog tus neeg muag khoom yuav tsum tau them nyiaj rau kev puas tsuaj rau kev puas tsuaj.

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