Electronics hnathawhna atana multimeters

Chuvangin multimeter i mamawh a ni. I hlui kha a thi tawh mai thei, electronics repair-ah i lut mai mai a ni mai thei, a nih loh leh voltage check ngai apianga i thawhpui fluke loan la i chau tawh mai thei bawk. A chhan chu eng pawh ni se, meter dik tak thlan hi YouTube-in a siam angin a awlsam lo hle.

Tunah hian electronics hi kum 8 vel zet ka fix tawh a, a tam zawk chu consumer stuff leh industrial equipment thenkhat a ni a, meter hrang hrang 6 emaw 7 emaw ka paltlang tawh ngei ang. Ṭhenkhat chu bawlhhlawh an ni a, ṭhenkhat chu an ṭha a, pakhat chu ladder aṭanga ka paih chhuah thlengin a ropui tak zet a ni (ka sualna, meter-te ni lo).

A bul tanna tam zawk chuan Fluke 87V lei nan $400 an hman a ngai niin an ngai. Chu chu mi tam zawk tan chuan a dik lo chauh a ni. Don’t get me wrong-Fluke hian meter tha tak tak a siam a, professional HVAC work emaw industrial maintenance emaw i tih chuan reading dik lo chuan downtime-ah sang tam tak a seng thei a, yeah, get the fluke. Mahse electronics hobbyist emaw, light professional work emaw pawh nise? Middle ground lian tak a awm a.

Tunah hian Brymen BM869s ka main meter atan ka hmang mek a. A man hi $180-200 vel a ni a, i lei na hmun a zirin. It’s got 60,000 count resolution which hi marketing nonsense angin a ri a mahse a takah chuan voltage emaw current emaw a inthlak danglamna te te hmuh i tum laiin danglamna a siam thin. The Reading Updates Fast-An specs angin second khatah vawi 50 vel-chu chu ka ngaihtuah aiin a pawimawh zawk a, meter ka neih hmaa ka sampling chak tak ka neih hma khan. Circuit board-a harsatna i hmuh tum lai i probing lai chuan, chu quick response chuan issues te chu rang zawkin i hmu thei a ni.

Brymen hma khan kum 3 vel zet uni-T UT61E ka nei a. Amazon-ah chuan 2019 khan $65 vel a ni mai thei (chumi hnuah chuan man a sang chho ta a, tunah chuan $80-90 vel a ni zawk). Chu meter chu ka thil tih 90% atan chuan a tling tawk vek a ni. Ka upgrade chhan awmchhun chu automotive diagnostic work tam zawk ka tih tan vang leh sampling rate chak zawk leh AC measurement theihna tha zawk ka mamawh vang a ni.

multimeter

Mi zawng zawngin "accuracy" chungchang an sawi vek a mahse mi tam zawk chuan accuracy spec awmzia pawh an hre lo. Meter pakhatin "±0.5% + 3 digit" a tih chuan chu chu number pakhat chauh a ni lo-rerror source hrang hrang pahnih inzawmkhawm a ni. Percentage part chu reading value atanga chhut a ni a, digit part chu fixed offset a ni. Chuvangin chu spec hmang chuan 10.00V i teh a nih chuan i voltage tak tak chu khawi hmunah pawh 9.92V atanga 10.08V thleng a ni thei. Electronics troubleshooting tam zawk tan chuan hei hi a pawimawh lo tak zet a ni. Capacitor chhe tak avanga 4.3V-a tlahniam tawh 5V rail i zawng a, precision instruments calibrate tum lovin.

Accuracy hian a pawimawh em emna hmun: Precision analog work, sensor calibration, emaw ripple specs testing power supplies emaw i tih chuan. Tichuan yeah, ±0.5% basic DC accuracy aia tha zawk i duh a ni. Ka Brymen hi ±0.03% a ni a, chu chu ka mamawh angin overkill a ni a, mahse package nen a rawn thleng.

Current measurement hi meter man tlawm tak takte’n an limitation an lantir tak takna hmun a ni. Burden voltage-chu chu meter chhunga shunt resistor-a voltage drop a ni a, meter man tlawm takah chuan a sang tawk thei a, chu chuan i teh tur circuit chu a nghawng tak tak thei a ni. Ka hlui $20 meter (brand pawh ka hre thei lo) ka test a, 10A range-ah 0.8V burden voltage vel a nei bawk. Chu chu a rapthlak hle mai. Uni-T chu 0.3V vel a ni. Brymen te hi 0.1V hnuai lam an ni. 5V circuit-a current i tehnaah chuan chu danglamna chu a pawimawh hle.

Unpopular opinion pawh a ni mai thei, mahse a takah chuan task tam tak atan manual ranging ka duh zawk. Autolanging meters hi eng voltage nge i en tih hriat loh laiin a awlsam a, mahse rail zawng zawng (3.3V, 5V, 12V, eng pawh ni se) ka hriat theihna tur board-a ka thawh lai hian, range chu vawi khat chauh ka set a, chutah chuan ka dah mai a ni. Auto leh manual inthlak danglam chu a awlsam tur a ni tho nain-meter thenkhatah chuan menu hrang hrangah i lai chhuak thei a, chu chu a ti buai hle.

Fluke 115 ($200-220 vel) hi "prosumer" meter lar ber a ni ngei ang a, a chhan pawh a awm. A bul berah chuan tihchhiat theih loh a ni a, build quality tha tak a nei a, interface pumpui pawh... sensible mai mai a ni. Engkim hi i beisei na hmun a ni. Thla engemaw zat chhung chu pakhat ka lo borrow a, dik tak chuan pakhat ka lei loh chhan awmchhun chu Brymen-te’n extra feature an neih ka duh vang a ni. Voltage, current, resistance, continuity, leh diode test chauh i mamawh a nih chuan 115 hian chu zawng zawng chu a ti tha vek a ni. An warranty support pawh hi legitimate takin a tha hle-kum tam tak chhunga tihduhdah hnua hlawhchham meter fluke replace meter nei electrician te hnen atangin thawnthu tam tak ka hre tawh.

Hei hi preachy ang maia ka ri dawn a ni mahse eng pawh nise. I meter-a cat rating hi marketing mai a ni lo. Cat II hi electronics leh low voltage work atan chuan a tha hle. CAT III hi distribution panel leh fixed installation atan a ni. Cat IV hi utility level thil atan a ni. Voltage rating (600V emaw 1000V ang chi) chu cat rating nen a inzawm a, meter hian transient leh fault conditions lamah eng nge him taka a handle theih tih a hrilh thei che a ni.

Meter man tlawm tak tak tam tak chuan safety rating lem emaw, dik lo emaw an nei a. Kum tlemte kalta khan he thil chungchangah hian sawiselna a awm a-EEVBlog chuan Amazon meter man tlawm tak tak, CAT III 1000V claim mahse CAT II dawng thei lo tur clearance nei te teardown a siam a. Video bik hi "Astroai" tih company atanga meter khat vel a ni ka ti a, Dave Jones chuan 8mm emaw thil dang emaw an sawi tur atana an mamawh laiin PCB clearances chu 2mm ang deuhin a teh a. (Source: eevblog.com tih a ni).

Low voltage DC stuff chauh hmanga hnathawh i nih chuan (48V hnuai lam) hei hian a pawimawh tak tak lo. Mahse, mains voltage hna i thawh chuan, legitimate safety certification nei brand hriat lar tak aṭangin meter khat lei la. Hei hian fluke, brymen, keysight, klein, amprobe, emaw chutiang chi emaw a kawk a ni. Not random amazon brands with 5-star reviews that are not suspicious at all.

Continuity beeper hi repair hna i thawh chuan eng multimeter pawha function awm tam ber-hman ber a ni mai thei. Shorts test te, connection check te, PCB traces tracing-i hmang reng thin. Meter thenkhat chuan beep triggers hmain delay an nei a, hei hian feature hi a hmantlak loh phah mai mai a ni. Delay hi 50ms hnuai lam a ni tur a ni. Eng pawh nise leh probes te chu continuity a awm em tih emaw, meter chu a la beep lo mai mai em tih emaw ngaihtuah chungin i sawn kual vel a ni.

Ka NO-name meter hlui khan 200-300ms delay a nei mai thei. Absolute garbage a awm a, chu chu quick continuity checks a ni. Uni-t kha a tha zawk hle a, 30-40ms vel a ni mai thei. Brymen hi a bulpui berah chuan instant a ni. Same with the flukes I’ve used-an continuity response pawh a tha hle.

Meter thenkhatah pawh a sang lutuk a threshold-ah a beep bawk. Continuity chu low resistance nen a inang lo-A tha ber chu beep hi 20-50Ω emaw a aia tlem emaw a trigger i duh a ni. Ka hmang tawh a, meter 200Ω thlenga beep thei a ni a, chu chuan connection tha leh marginal tak thliar hran i tum laiin a tum chu a hneh a ni.

multimeter

Mi zawng zawngin measurement specs an ngaihtuah a, chu thil chu i hman tak tak a ngai tih chu a ngaihthah vek a ni. Screen quality a pawimawh hle. Backlight a pawimawh. Button layout a pawimawh. Leads te hi jacks-a an awm reng em tih hi a pawimawh (I’m looking at you, Mastech MS8268-chu jack te kha an rapthlak hle).

Brymen hian display tha tak tak a nei a-digit dum a ni a, background dum ah a awm a, eng lighting ah pawh chhiar a awlsam. Backlight hi a eng tawk a, dim condition-ah pawh hman theih a ni a, mahse a eng lutuk lo a, chu chuan hmun thim takah hna i thawh chuan i night vision a tichhe thei lo. Small detail, mahse ngaihsan a hlawh.

Lead storage hi tumahin an sawi loh thil dang a ni. I tih zawh hunah khawiah nge leads te kha i dah thin? Meter thenkhatah chuan holder an nei a, thenkhatah chuan an nei lo. Ka toolbox-ah magnetic lead holders ka hmang a, a thawk tha hle a, mahse ngaihtuah tur pakhat a ni leh.

Oh leh hetah hian ka thinrimna thil pakhat chu: MA range leh 10A range tan fuse hran nei lo meter te. Main fuse i blow chuan range pahnih hi i hloh vek a ni. Meter tha zawk hian fuse hrang hrang pahnih a nei a, chuvang chuan ma fuse a puak chuan current sang zawk i la teh thei tho. Brymen te hian hei hi an nei a, meter man tlawm zawk chuan an nei lo.

Meter tam tak chuan temperature tehna chu feature angin an advertise a. Brymen hmang hian k-type thermocouple a tel a. Ka hmang tawh mai thei... vawi nga? Kum thum chhungin? A thawk thei lo tihna a ni lo, temperature tehna hna tam zawk tan chuan infrared thermometer emaw dedicated thermocouple meter emaw a tha zawk tihna chauh a ni. Multimeter temperature function-a dikna chu a tlangpuiin ±1-2℃ang chi a ni a, chu chu rough check-na atan chuan a tha a, mahse temperature data dik tak i mamawh tak tak chuan a ropui lo.

Khawiah nge a tangkai: thil pakhat a lum lutuk nia i rinhlelh laiin board-a component temperature enfiah. Chip emaw regulator emaw probe in reading i hmu thei bawk. Mahse ambient temperature emaw thil dang emaw atan chuan hmanraw dang ka hmang ang.

Anni hi thil bulpui tak tak atan chuan an tha khawp mai. Battery voltage check nan ka car toolkit ah pakhat ka dah a, thil dang tam tak a ni lo. A dikna chu zawhna awm thei a ni a, build quality pawh zawhna awm thei a ni a, a himna pawh zawhna awm thei a ni ngei ang. Mahse low-risk situation-a DC voltage tehna awlsam tak tan chuan an thawk thei. Thil pawimawh tak tak atan ring suh la, mains voltage-ah pawh hmang suh.

Harbor Freight atang hian vawi khat chu random $18 meter ka test a (model chu 37772 ang deuh a ni a, tunah chuan an thlak danglam tawh ngei ang) ka Brymen te nen chhiar te ka khaikhin a. DC voltage atan chuan 0.1-0.2V chhungah a awm tlangpui a, chu chu battery check nan a pawm theih a ni. AC voltage atan chuan place-measured 127V chu outlet pakhatah a awm vek a, chu chu ka meter tha tak angin 121V a ni tak zet a ni. Chu chu thil dik lo mai a ni lo, chu chu chutiang chhiarna atanga thutlukna i siam a nih chuan a hlauhawm thei hle.

Keysight-a engineer-te testing thenkhat (Keysight.com/blogs) atanga a lan dan chuan meter man tlawm zawka failure mode hi an fail hunah chuan chhiatna nasa tak a ni fo-No arc protection, minimal fusing, leh PCB traces that just vaporize aiah him taka fail lo ai chuan. Teardown analysis an neihah chuan internal construction quality an tarlang a, chu chuan safety certification dik tak a paltlang lo ang.

Tunah chuan meter thenkhatah chuan data logging atan Bluetooth emaw USB connectivity emaw an nei tawh bawk. Ka hnathawhna atan hian hei hi a tangkai ka ti lo a, mahse a hlu tur tur application ka hmu thei-long-Term monitoring, automated testing, chutiang chi chu. Brymen BM869s hian optical USB (model ka neih ang kha ni lo mahse an siam) a nei a, a takah chuan a tangkai hle a ni, a chhan chu optical isolation tih hian computer nena inzawm hunah ground loop emaw noise issue emaw a awm lo tihna a ni.

Logging i mamawh chuan chutiang atana siam bik dedicated logging multimeters a awm a. Entirnan fluke 289 hian chhiar tur sang tam tak chu timestamps nen a dah thei a. Costs $500+ mahse impulse purchase a ni lo.

multimeter

Mi pakhat electronics lama lut thar tan chuan: uni-T UT61E emaw chutiang chi ~$70-80 range meter emaw. Zirna atan accuracy tha tawk a hmu a, thil dik lo i probe palh chuan a thi dawn lo (a reasonable safety features a nei). Soldering iron emaw scope tha tak ang chi hmanraw tha zawk atan pawisa chu khawl khawm rawh.

Professional electronics siamthat hna thawhna atan: Brymen BM869S emaw Fluke 115/117 emaw. an pahnih hian $180-220 vel an ni. Brymen hian feature an nei tam zawk a, fluke pawh a rugged zawk a, warranty support pawh a nei tha zawk bawk. Chutiang bawkin a kal sual thei tak tak lo.

Industrial/electrical hnathawhna atan: Fluke 87V emaw a tlukpui emaw. $400-450 mahse safety ratings leh durability atan chuan a hlu hle. Hetah hian ka man tlawm lo ang a, a chhan chu meter a chhiat avanga a rah chhuah tur chu a pawi zawk hle.

Automotive atan: AC voltage dik tak (sensors tan), sampling chak tak, leh Hz/duty cycle tehna mamawh. Fluke 88V hi a lar hle a, mahse a man a to hle. Snap-on ang company atanga automotive-specific meter a awm a mahse an man to zawk a, full-time auto tech i nih loh chuan a hlu lo mai thei.

Tuman keysight an mamawh lo 34461A benchtop meter metrology emaw precision calibration hna i thawh loh chuan. Chutiang chu $900+ atanga tan a ni a, yeah an dik tak zet a ni tih rin theih a ni (±0.004% DC V) mahse normal repair leh troubleshooting atan chuan a hman theih loh vek. Hei hi ka sawi chhan chu forum-a miten beginners-te hnena an recommend ka hmuh vang a ni a, chu chu thil âwm lo mai mai a ni.

Chu chu multimeter thlan huna pawimawh ka tih tam zawk chu a ni. Didn’t cover oscilloscope integration features emaw, specialized measurement types tak tak thenkhat (inductance, capacitance above basic testing) thenkhat a huam lo a ni, a chhan chu frankly chuan ngaihdan nghet tak nei tur chuan chutiang chu ka hmang lo. Safety certification tak tak nei brand dik tak atanga thil lei la, continuity beeper chu a rang em tih enfiah la, i dam tha mai thei.

Oh leh thil hnuhnung ber pakhat-spare battery te chu a chhehvelah dah rawh. Metre tam zawkah chuan 9V an hmang a mahse model thenkhat (certain flukes, entirnan) mamawh .Lithium Cr1/3N a ni a, a hmanna tur a awm lo.chu chu a awm lo ang. Repair hna chanve vel i meter die neih chu a tithinrim a, chuvangin meter i order hunah spare pahnih khat tal la mai rawh.