{"id":3348,"date":"2024-01-19T19:41:49","date_gmt":"2024-01-19T11:41:49","guid":{"rendered":"https:\/\/chimaytech.net\/?p=3348"},"modified":"2024-02-20T21:23:35","modified_gmt":"2024-02-20T13:23:35","slug":"when-measuring-resistance-with-an-ohmmeter","status":"publish","type":"post","link":"https:\/\/chimaytech.net\/vi\/when-measuring-resistance-with-an-ohmmeter\/","title":{"rendered":"khi \u0111o \u0111i\u1ec7n tr\u1edf b\u1eb1ng \u00f4m k\u1ebf, h\u00e3y quan s\u00e1t c\u1ef1c t\u00ednh"},"content":{"rendered":"

“\u0110o \u0111i\u1ec7n tr\u1edf ch\u00ednh x\u00e1c: Ch\u00fa \u00fd c\u1ef1c t\u00ednh b\u1eb1ng \u00f4m k\u1ebf.”<\/p>\n

T\u1ea7m quan tr\u1ecdng c\u1ee7a c\u1ef1c t\u00ednh khi \u0111o \u0111i\u1ec7n tr\u1edf b\u1eb1ng Ohmmeter<\/h1>\n

\n\"when<\/p>\n

\nKhi n\u00f3i \u0111\u1ebfn vi\u1ec7c \u0111o \u0111i\u1ec7n tr\u1edf b\u1eb1ng \u00f4m k\u1ebf, m\u1ed9t y\u1ebfu t\u1ed1 quan tr\u1ecdng th\u01b0\u1eddng b\u1ecb b\u1ecf qua l\u00e0 c\u1ef1c t\u00ednh. Ph\u00e2n c\u1ef1c \u0111\u1ec1 c\u1eadp \u0111\u1ebfn h\u01b0\u1edbng c\u1ee7a d\u00f2ng \u0111i\u1ec7n trong m\u1ea1ch v\u00e0 n\u00f3 \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c \u0111o \u0111i\u1ec7n tr\u1edf ch\u00ednh x\u00e1c.<\/p>\n

\u0110\u1ec3 hi\u1ec3u t\u1ea1i sao ph\u00e2n c\u1ef1c l\u1ea1i quan tr\u1ecdng, tr\u01b0\u1edbc ti\u00ean ch\u00fang ta h\u00e3y xem c\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a ohm k\u1ebf. \u00d4m k\u1ebf l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb d\u00f9ng \u0111\u1ec3 \u0111o \u0111i\u1ec7n tr\u1edf c\u1ee7a m\u1ed9t b\u1ed9 ph\u1eadn ho\u1eb7c m\u1ea1ch \u0111i\u1ec7n. N\u00f3 th\u1ef1c hi\u1ec7n \u0111i\u1ec1u n\u00e0y b\u1eb1ng c\u00e1ch truy\u1ec1n m\u1ed9t d\u00f2ng \u0111i\u1ec7n nh\u1ecf \u0111\u00e3 bi\u1ebft qua b\u1ed9 ph\u1eadn \u0111\u00f3 v\u00e0 \u0111o \u0111\u1ed9 s\u1ee5t \u00e1p tr\u00ean n\u00f3. Sau \u0111\u00f3 \u0111i\u1ec7n tr\u1edf \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng \u0111\u1ecbnh lu\u1eadt Ohm, trong \u0111\u00f3 \u0111i\u1ec7n tr\u1edf b\u1eb1ng \u0111i\u1ec7n \u00e1p chia cho d\u00f2ng \u0111i\u1ec7n.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
B\u1ed9 \u0111i\u1ec1u khi\u1ec3n ch\u01b0\u01a1ng tr\u00ecnh th\u1ea9m th\u1ea5u ng\u01b0\u1ee3c hai giai \u0111o\u1ea1n ROS-2210<\/td>\n<\/tr>\n
\u3000<\/td>\n1.b\u1ec3 ch\u1ee9a n\u01b0\u1edbc ngu\u1ed3n kh\u00f4ng c\u00f3 b\u1ea3o v\u1ec7 n\u01b0\u1edbc<\/td>\n<\/tr>\n
\u3000<\/td>\n2. B\u1ec3 tinh khi\u1ebft m\u1ee9c th\u1ea5p<\/td>\n<\/tr>\n
\u3000<\/td>\n3.B\u1ec3 tinh khi\u1ebft c\u1ea5p cao<\/td>\n<\/tr>\n
T\u00edn hi\u1ec7u thu nh\u1eadn<\/td>\n4.b\u1ea3o v\u1ec7 \u00e1p su\u1ea5t th\u1ea5p<\/td>\n<\/tr>\n
\u3000<\/td>\n5.b\u1ea3o v\u1ec7 \u00e1p su\u1ea5t cao<\/td>\n<\/tr>\n
\u3000<\/td>\n6.t\u00e1i sinh ti\u1ec1n x\u1eed l\u00fd<\/td>\n<\/tr>\n
\u3000<\/td>\n7.\u0111i\u1ec1u khi\u1ec3n b\u1eb1ng tay\/t\u1ef1 \u0111\u1ed9ng<\/td>\n<\/tr>\n
\u3000<\/td>\n1.van c\u1ea5p n\u01b0\u1edbc<\/td>\n<\/tr>\n
\u3000<\/td>\n2. van x\u1ea3<\/td>\n<\/tr>\n
Ki\u1ec3m so\u00e1t \u0111\u1ea7u ra<\/td>\n3. b\u01a1m \u00e1p su\u1ea5t th\u1ea5p<\/td>\n<\/tr>\n
\u3000<\/td>\n4.b\u01a1m cao \u00e1p<\/td>\n<\/tr>\n
\u3000<\/td>\n5.\u0111\u1ed9 d\u1eabn \u0111i\u1ec7n tr\u00ean van ti\u00eau chu\u1ea9n<\/td>\n<\/tr>\n
Ph\u1ea1m vi \u0111o<\/td>\n0~2000uS<\/td>\n<\/tr>\n
Ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9<\/td>\nD\u1ef1a tr\u00ean 25\u2103, t\u1ef1 \u0111\u1ed9ng b\u00f9 nhi\u1ec7t \u0111\u1ed9<\/td>\n<\/tr>\n
\u3000<\/td>\nAC220v\u00b110% 50\/60Hz<\/td>\n<\/tr>\n
Ngu\u1ed3n \u0111i\u1ec7n<\/td>\nAC110v\u00b110% 50\/60Hz<\/td>\n<\/tr>\n
\u3000<\/td>\nDC24v\u00b110%<\/td>\n<\/tr>\n
Nhi\u1ec7t \u0111\u1ed9 trung b\u00ecnh<\/td>\n60\u2103<\/td>\n<\/tr>\n
\u3000<\/td>\n120\u2103<\/td>\n<\/tr>\n
\u0110\u1ea7u ra \u0111i\u1ec1u khi\u1ec3n<\/td>\n5A\/250V AC<\/td>\n<\/tr>\n
\u0110\u1ed9 \u1ea9m t\u01b0\u01a1ng \u0111\u1ed1i<\/td>\n\u226485%<\/td>\n<\/tr>\n
Nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng<\/td>\n0~50\u2103<\/td>\n<\/tr>\n
K\u00edch th\u01b0\u1edbc l\u1ed7<\/td>\n92*92mm(cao*r\u1ed9ng)<\/td>\n<\/tr>\n
Ph\u01b0\u01a1ng ph\u00e1p c\u00e0i \u0111\u1eb7t<\/td>\nPh\u1ea7n nh\u00fang<\/td>\n<\/tr>\n
H\u1eb1ng s\u1ed1 \u00f4<\/td>\n1.0cm-\u00b9*2<\/td>\n<\/tr>\n
Hi\u1ec3n th\u1ecb c\u00e1ch s\u1eed d\u1ee5ng<\/td>\nHi\u1ec3n th\u1ecb k\u1ef9 thu\u1eadt s\u1ed1: gi\u00e1 tr\u1ecb \u0111\u1ed9 d\u1eabn\/gi\u00e1 tr\u1ecb nhi\u1ec7t \u0111\u1ed9; Bi\u1ec3u \u0111\u1ed3 quy tr\u00ecnh RO h\u1ed7 tr\u1ee3<\/td>\n<\/tr>\n
\u3000<\/td>\n1.C\u00e0i \u0111\u1eb7t lo\u1ea1i v\u00e0 h\u1eb1ng s\u1ed1 \u0111i\u1ec7n c\u1ef1c<\/td>\n<\/tr>\n
\u3000<\/td>\n2.C\u00e0i \u0111\u1eb7t v\u01b0\u1ee3t qu\u00e1 \u0111\u1ed9 d\u1eabn \u0111i\u1ec7n<\/td>\n<\/tr>\n
\u3000<\/td>\n3.C\u00e0i \u0111\u1eb7t x\u1ea3 trong kho\u1ea3ng th\u1eddi gian * gi\u1edd<\/td>\n<\/tr>\n
Ch\u1ee9c n\u0103ng ch\u00ednh<\/td>\n4.C\u00e0i \u0111\u1eb7t th\u1eddi gian x\u1ea3<\/td>\n<\/tr>\n
\u3000<\/td>\n5.C\u00e0i \u0111\u1eb7t th\u1eddi gian ch\u1ea1y m\u00e0ng RO<\/td>\n<\/tr>\n
\u3000<\/td>\n6.B\u1eadt ngu\u1ed3n t\u1ef1 \u0111\u1ed9ng v\u1eadn h\u00e0nh\/c\u00e0i \u0111\u1eb7t d\u1eebng<\/td>\n<\/tr>\n
\u3000<\/td>\n7.\u0110\u1ecba ch\u1ec9 g\u1eedi th\u01b0, c\u00e0i \u0111\u1eb7t t\u1ed1c \u0111\u1ed9 truy\u1ec1n<\/td>\n<\/tr>\n
\u3000<\/td>\n8.Giao di\u1ec7n truy\u1ec1n th\u00f4ng RS-485 t\u00f9y ch\u1ecdn<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n

\nB\u00e2y gi\u1edd, h\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng b\u1ea1n \u0111ang \u0111o \u0111i\u1ec7n tr\u1edf c\u1ee7a m\u1ed9t \u0111i\u1ec7n tr\u1edf b\u1eb1ng \u00f4m k\u1ebf. \u0110i\u1ec7n tr\u1edf c\u00f3 hai c\u1ef1c v\u00e0 vi\u1ec7c b\u1ea1n k\u1ebft n\u1ed1i c\u1ef1c d\u01b0\u01a1ng v\u00e0 c\u1ef1c \u00e2m c\u1ee7a ohmmeter v\u1edbi c\u1ef1c n\u00e0o kh\u00f4ng quan tr\u1ecdng. Tuy nhi\u00ean, khi n\u00f3i \u0111\u1ebfn c\u00e1c th\u00e0nh ph\u1ea7n kh\u00e1c nh\u01b0 \u0111i\u1ed1t ho\u1eb7c b\u00f3ng b\u00e1n d\u1eabn, c\u1ef1c t\u00ednh tr\u1edf n\u00ean quan tr\u1ecdng.<\/p>\n

\u0110i\u1ed1t l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb hai c\u1ef1c cho ph\u00e9p d\u00f2ng \u0111i\u1ec7n ch\u1ec9 ch\u1ea1y theo m\u1ed9t h\u01b0\u1edbng. N\u1ebfu b\u1ea1n \u0111o \u0111i\u1ec7n tr\u1edf c\u1ee7a m\u1ed9t diode m\u00e0 kh\u00f4ng x\u00e9t \u0111\u1ebfn c\u1ef1c t\u00ednh, b\u1ea1n s\u1ebd c\u00f3 k\u1ebft qu\u1ea3 sai. \u0110i\u1ec1u n\u00e0y l\u00e0 do \u0111i\u1ec7n tr\u1edf c\u1ee7a diode kh\u00f4ng c\u1ed1 \u0111\u1ecbnh v\u00e0 ph\u1ee5 thu\u1ed9c v\u00e0o h\u01b0\u1edbng c\u1ee7a d\u00f2ng \u0111i\u1ec7n. B\u1eb1ng c\u00e1ch quan s\u00e1t c\u1ef1c t\u00ednh v\u00e0 n\u1ed1i d\u00e2y d\u1eabn d\u01b0\u01a1ng c\u1ee7a \u00f4m k\u1ebf v\u1edbi c\u1ef1c d\u01b0\u01a1ng (c\u1ef1c d\u01b0\u01a1ng) v\u00e0 d\u00e2y d\u1eabn \u00e2m v\u1edbi c\u1ef1c \u00e2m (c\u1ef1c \u00e2m) c\u1ee7a diode, b\u1ea1n c\u00f3 th\u1ec3 \u0111o ch\u00ednh x\u00e1c \u0111i\u1ec7n tr\u1edf c\u1ee7a n\u00f3.<\/p>\n

\n\"alt-267\"
\nT\u01b0\u01a1ng t\u1ef1, b\u00f3ng b\u00e1n d\u1eabn l\u00e0 thi\u1ebft b\u1ecb ba c\u1ef1c c\u00f3 ch\u1ee9c n\u0103ng khu\u1ebfch \u0111\u1ea1i ho\u1eb7c chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u \u0111i\u1ec7n t\u1eed v\u00e0 c\u0169ng c\u1ea7n ch\u00fa \u00fd \u0111\u1ebfn c\u1ef1c t\u00ednh khi \u0111o \u0111i\u1ec7n tr\u1edf. M\u1ed9t b\u00f3ng b\u00e1n d\u1eabn c\u00f3 m\u1ed9t c\u1ef1c g\u1ed1c, c\u1ef1c thu v\u00e0 c\u1ef1c ph\u00e1t. \u0110i\u1ec7n tr\u1edf gi\u1eefa c\u00e1c c\u1ef1c n\u00e0y c\u00f3 th\u1ec3 thay \u0111\u1ed5i t\u00f9y theo h\u01b0\u1edbng c\u1ee7a d\u00f2ng \u0111i\u1ec7n. B\u1eb1ng c\u00e1ch k\u1ebft n\u1ed1i c\u1ef1c d\u01b0\u01a1ng c\u1ee7a \u00f4m k\u1ebf v\u1edbi c\u1ef1c c\u01a1 b\u1ea3n v\u00e0 c\u1ef1c \u00e2m v\u1edbi c\u1ef1c c\u1ef1c thu ho\u1eb7c c\u1ef1c ph\u00e1t, b\u1ea1n c\u00f3 th\u1ec3 \u0111o \u0111i\u1ec7n tr\u1edf m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c.<\/p>\n

Ngo\u00e0i \u0111i\u1ed1t v\u00e0 b\u00f3ng b\u00e1n d\u1eabn, c\u00f2n c\u00f3 c\u00e1c th\u00e0nh ph\u1ea7n kh\u00e1c nh\u01b0 t\u1ee5 \u0111i\u1ec7n v\u00e0 cu\u1ed9n c\u1ea3m c\u0169ng c\u00f3 ch\u1ee9c n\u0103ng n\u00e0y. th\u1ec3 hi\u1ec7n \u0111i\u1ec7n tr\u1edf ph\u1ee5 thu\u1ed9c v\u00e0o c\u1ef1c. T\u1ee5 \u0111i\u1ec7n l\u01b0u tr\u1eef n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n v\u00e0 c\u00f3 hai c\u1ef1c, m\u1ed9t c\u1ef1c d\u01b0\u01a1ng v\u00e0 m\u1ed9t c\u1ef1c \u00e2m. \u0110i\u1ec7n tr\u1edf c\u1ee7a t\u1ee5 \u0111i\u1ec7n c\u00f3 th\u1ec3 thay \u0111\u1ed5i t\u00f9y theo chi\u1ec1u d\u00f2ng \u0111i\u1ec7n. B\u1eb1ng c\u00e1ch n\u1ed1i c\u1ef1c d\u01b0\u01a1ng c\u1ee7a \u00f4m k\u1ebf v\u1edbi c\u1ef1c d\u01b0\u01a1ng v\u00e0 c\u1ef1c \u00e2m v\u1edbi c\u1ef1c \u00e2m, b\u1ea1n c\u00f3 th\u1ec3 \u0111o \u0111i\u1ec7n tr\u1edf m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c.<\/p>\n

M\u1eb7t kh\u00e1c, cu\u1ed9n c\u1ea3m l\u01b0u tr\u1eef n\u0103ng l\u01b0\u1ee3ng trong t\u1eeb tr\u01b0\u1eddng v\u00e0 c\u0169ng c\u00f3 hai c\u1ef1c. \u0110i\u1ec7n tr\u1edf c\u1ee7a cu\u1ed9n c\u1ea3m c\u00f3 th\u1ec3 thay \u0111\u1ed5i t\u00f9y theo chi\u1ec1u d\u00f2ng \u0111i\u1ec7n. B\u1eb1ng c\u00e1ch n\u1ed1i c\u1ef1c d\u01b0\u01a1ng c\u1ee7a \u00f4m k\u1ebf v\u1edbi m\u1ed9t c\u1ef1c v\u00e0 c\u1ef1c \u00e2m v\u1edbi c\u1ef1c kia, b\u1ea1n c\u00f3 th\u1ec3 \u0111o \u0111i\u1ec7n tr\u1edf m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c.<\/p>\n

T\u00f3m l\u1ea1i, khi \u0111o \u0111i\u1ec7n tr\u1edf b\u1eb1ng \u00f4m k\u1ebf, \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i quan s\u00e1t c\u1ef1c t\u00ednh, \u0111\u1eb7c bi\u1ec7t l\u00e0 khi l\u00e0m vi\u1ec7c v\u1edbi c\u00e1c th\u00e0nh ph\u1ea7n nh\u01b0 \u0111i\u1ed1t, b\u00f3ng b\u00e1n d\u1eabn, t\u1ee5 \u0111i\u1ec7n v\u00e0 cu\u1ed9n c\u1ea3m. B\u1eb1ng c\u00e1ch k\u1ebft n\u1ed1i ch\u00ednh x\u00e1c c\u00e1c c\u1ef1c d\u01b0\u01a1ng v\u00e0 c\u1ef1c \u00e2m c\u1ee7a \u00f4m k\u1ebf, b\u1ea1n c\u00f3 th\u1ec3 \u0111\u1ea3m b\u1ea3o c\u00e1c ph\u00e9p \u0111o \u0111i\u1ec7n tr\u1edf ch\u00ednh x\u00e1c. B\u1ecf qua s\u1ef1 ph\u00e2n c\u1ef1c c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn k\u1ebft qu\u1ea3 \u0111\u1ecdc sai v\u00e0 t\u00ednh to\u00e1n kh\u00f4ng ch\u00ednh x\u00e1c. V\u00ec v\u1eady, h\u00e3y lu\u00f4n nh\u1edb ch\u00fa \u00fd \u0111\u1ebfn c\u1ef1c t\u00ednh khi s\u1eed d\u1ee5ng \u00f4m k\u1ebf \u0111\u1ec3 \u0111o \u0111i\u1ec7n tr\u1edf.<\/p>\n","protected":false},"excerpt":{"rendered":"

“\u0110o \u0111i\u1ec7n tr\u1edf ch\u00ednh x\u00e1c: Ch\u00fa \u00fd c\u1ef1c t\u00ednh b\u1eb1ng \u00f4m k\u1ebf.” T\u1ea7m quan tr\u1ecdng c\u1ee7a c\u1ef1c t\u00ednh khi \u0111o \u0111i\u1ec7n tr\u1edf b\u1eb1ng Ohmmeter Khi n\u00f3i \u0111\u1ebfn vi\u1ec7c \u0111o \u0111i\u1ec7n tr\u1edf b\u1eb1ng \u00f4m k\u1ebf, m\u1ed9t y\u1ebfu t\u1ed1 quan tr\u1ecdng th\u01b0\u1eddng b\u1ecb b\u1ecf qua l\u00e0 c\u1ef1c t\u00ednh. Ph\u00e2n c\u1ef1c \u0111\u1ec1 c\u1eadp \u0111\u1ebfn h\u01b0\u1edbng c\u1ee7a d\u00f2ng \u0111i\u1ec7n…<\/p>\n","protected":false},"author":1,"featured_media":3349,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false},"categories":[1],"tags":[],"translation":{"provider":"WPGlobus","version":"2.12.0","language":"vi","enabled_languages":["en","es","de","fr","ru","pt","ar","ja","ko","it","id","hi","th","vi","tr"],"languages":{"en":{"title":true,"content":true,"excerpt":false},"es":{"title":true,"content":true,"excerpt":false},"de":{"title":true,"content":true,"excerpt":false},"fr":{"title":true,"content":true,"excerpt":false},"ru":{"title":true,"content":true,"excerpt":false},"pt":{"title":true,"content":true,"excerpt":false},"ar":{"title":false,"content":false,"excerpt":false},"ja":{"title":true,"content":true,"excerpt":false},"ko":{"title":true,"content":true,"excerpt":false},"it":{"title":true,"content":true,"excerpt":false},"id":{"title":false,"content":false,"excerpt":false},"hi":{"title":false,"content":false,"excerpt":false},"th":{"title":true,"content":true,"excerpt":false},"vi":{"title":true,"content":true,"excerpt":false},"tr":{"title":false,"content":false,"excerpt":false}}},"_links":{"self":[{"href":"https:\/\/chimaytech.net\/vi\/wp-json\/wp\/v2\/posts\/3348"}],"collection":[{"href":"https:\/\/chimaytech.net\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/chimaytech.net\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/chimaytech.net\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/chimaytech.net\/vi\/wp-json\/wp\/v2\/comments?post=3348"}],"version-history":[{"count":0,"href":"https:\/\/chimaytech.net\/vi\/wp-json\/wp\/v2\/posts\/3348\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/chimaytech.net\/vi\/wp-json\/wp\/v2\/media\/3349"}],"wp:attachment":[{"href":"https:\/\/chimaytech.net\/vi\/wp-json\/wp\/v2\/media?parent=3348"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/chimaytech.net\/vi\/wp-json\/wp\/v2\/categories?post=3348"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/chimaytech.net\/vi\/wp-json\/wp\/v2\/tags?post=3348"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}