{"id":19825,"date":"2022-06-23T09:17:19","date_gmt":"2022-06-23T09:17:19","guid":{"rendered":"http:\/\/dgbellvietnam.com\/low-temperature-environment-test-of-electronic-instruments-part-1\/"},"modified":"2024-10-25T14:31:52","modified_gmt":"2024-10-25T07:31:52","slug":"low-temperature-environment-test-of-electronic-instruments-part-1","status":"publish","type":"post","link":"https:\/\/dgbellvietnam.com\/en\/low-temperature-environment-test-of-electronic-instruments-part-1\/","title":{"rendered":"Th\u1eed nghi\u1ec7m m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p c\u1ee7a thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed \u2013 Ph\u1ea7n 1"},"content":{"rendered":"
\n

Hi\u1ec7n nay, c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c l\u0129nh v\u1ef1c qu\u00e2n s\u1ef1, d\u00e2n s\u1ef1 v\u00e0 c\u00f4ng ngh\u1ec7 cao. Tuy nhi\u00ean, m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p t\u1ed3n t\u1ea1i trong h\u1ea7u h\u1ebft c\u00e1c m\u00f4i tr\u01b0\u1eddng d\u1ecbch v\u1ee5 c\u1ee7a n\u00f3. Do \u0111\u00f3, kh\u1ea3 n\u0103ng th\u00edch \u1ee9ng c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p c\u00f3 li\u00ean quan tr\u1ef1c ti\u1ebfp \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a ch\u00fang. D\u1ef1a tr\u00ean \u0111i\u1ec1u n\u00e0y, b\u00e0i b\u00e1o n\u00e0y ph\u00e2n t\u00edch chi ti\u1ebft c\u00e1c t\u00e1c \u0111\u1ed9ng c\u1ee7a m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p v\u00e0 c\u00f4ng ngh\u1ec7 <\/span><\/span>th\u1eed nghi\u1ec7m nhi\u1ec7t \u0111\u1ed9 th\u1ea5p<\/span><\/span><\/a> li\u00ean quan \u0111\u1ebfn c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed.<\/span><\/span><\/p>\n

1. T\u1ed5ng quan v\u1ec1 m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p<\/span><\/span><\/strong><\/span><\/span><\/h1>\n

L\u00e0 m\u1ed9t \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng t\u1ef1 nhi\u00ean ph\u1ed5 bi\u1ebfn, m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p th\u01b0\u1eddng do v\u0129 \u0111\u1ed9 \u0111\u1ecba l\u00fd, \u0111\u1ed9 cao, m\u00f9a, ng\u00e0y v\u00e0 \u0111\u00eam thay \u0111\u1ed5i v\u00e0 ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb l\u00e0m l\u1ea1nh kh\u00e1c g\u00e2y ra. Trong qu\u00e1 tr\u00ecnh ph\u00e1t tri\u1ec3n c\u00e1c s\u1ea3n ph\u1ea9m \u0111i\u1ec7n t\u1eed, \u0111\u1ec3 \u0111\u00e1p \u1ee9ng nhu c\u1ea7u l\u01b0u tr\u1eef v\u00e0 l\u00e0m vi\u1ec7c \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, Trung Qu\u1ed1c hi\u1ec7n \u0111ang l\u1eadp k\u1ebf ho\u1ea1ch v\u00e0 x\u00e2y d\u1ef1ng m\u1ed9t ph\u00f2ng th\u00ed nghi\u1ec7m m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p quy m\u00f4 t\u01b0\u01a1ng \u0111\u1ed1i l\u1edbn. M\u1ed9t s\u1ed1 ph\u00f2ng th\u00ed nghi\u1ec7m nhi\u1ec7t \u0111\u1ed9 th\u1ea5p hi\u1ec7n c\u00f3 c\u0169ng \u0111ang ph\u1ea3i \u0111\u1ed1i m\u1eb7t v\u1edbi c\u00e1c v\u1ea5n \u0111\u1ec1 nh\u01b0 n\u00e2ng c\u1ea5p thi\u1ebft b\u1ecb v\u00e0 chuy\u1ec3n \u0111\u1ed5i k\u1ef9 thu\u1eadt. \u0110\u1ec3 m\u00f4 ph\u1ecfng m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, c\u00f4ng ngh\u1ec7 n\u00e0y \u0111ang ph\u1ea3i \u0111\u1ed1i m\u1eb7t v\u1edbi th\u00e1ch th\u1ee9c v\u1ec1 ph\u00e1t tri\u1ec3n c\u00f4ng ngh\u1ec7 v\u00e0 c\u01a1 h\u1ed9i ph\u00e1t tri\u1ec3n m\u1edbi. Nghi\u00ean c\u1ee9u v\u1ec1 kh\u1ea3 n\u0103ng th\u00edch \u1ee9ng c\u1ee7a m\u1ed9t s\u1ed1 s\u1ea3n ph\u1ea9m c\u00f4ng nghi\u1ec7p kh\u00e1c v\u1edbi m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p \u0111ang ng\u00e0y c\u00e0ng m\u1edf r\u1ed9ng v\u00e0 chuy\u00ean s\u00e2u h\u01a1n.<\/span><\/span><\/p>\n

2. Ph\u00e2n t\u00edch t\u00e1c \u0111\u1ed9ng m\u00f4i tr\u01b0\u1eddng \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p<\/span><\/span><\/strong><\/span><\/span><\/h1>\n

2.1 T\u00e1c \u0111\u1ed9ng x\u1ea5u \u0111\u1ebfn v\u1eadt li\u1ec7u kim lo\u1ea1i c\u1ee7a d\u1ee5ng c\u1ee5 \u0111i\u1ec7n t\u1eed<\/span><\/span><\/span><\/h2>\n

Trong c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed th\u00f4ng th\u01b0\u1eddng, \u0111\u1ed9 b\u1ec1n c\u1ee7a th\u00e9p v\u00e0 c\u00e1c v\u1eadt li\u1ec7u kim lo\u1ea1i kh\u00e1c s\u1ebd gi\u1ea3m trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p v\u00e0 v\u1eadt li\u1ec7u d\u1ec5 tr\u1edf n\u00ean gi\u00f2n, \u0111\u1eb7c bi\u1ec7t l\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i va \u0111\u1eadp s\u1ebd gi\u1ea3m \u1edf m\u1ed9t m\u1ee9c \u0111\u1ed9 nh\u1ea5t \u0111\u1ecbnh. N\u1ebfu c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed \u1edf trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, ch\u00fang r\u1ea5t d\u1ec5 b\u1ecb g\u00e3y. C\u00e1c v\u1eadt li\u1ec7u kh\u00e1c nhau c\u1ee7a thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed c\u00f3 nhi\u1ec7t \u0111\u1ed9 gi\u00f2n \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p kh\u00e1c nhau. Khi thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, h\u1ea7u h\u1ebft c\u00e1c h\u1ecfng h\u00f3c gi\u00f2n th\u01b0\u1eddng x\u1ea3y ra \u1edf khu v\u1ef1c h\u00e0n li\u1ec1n k\u1ec1 ho\u1eb7c \u1edf khu v\u1ef1c h\u00e0n, nguy\u00ean nh\u00e2n l\u00e0 do c\u00e1c v\u1ebft n\u1ee9t \u1edf khu v\u1ef1c h\u00e0n. Do \u0111\u00f3, nh\u00e2n vi\u00ean n\u00ean \u0111\u1eb7c bi\u1ec7t ch\u00fa \u00fd \u0111\u1ebfn v\u1ea5n \u0111\u1ec1 gi\u00f2n \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p trong khu v\u1ef1c h\u00e0n c\u1ee7a v\u1eadt li\u1ec7u kim lo\u1ea1i c\u1ee7a thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed. Gi\u00f2n \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p c\u0169ng s\u1ebd \u0111\u01b0\u1ee3c \u0111\u1eb7c bi\u1ec7t xem x\u00e9t khi thi\u1ebft k\u1ebf v\u00e0 ph\u00e1t tri\u1ec3n c\u00e1c s\u1ea3n ph\u1ea9m c\u01a1 kh\u00ed \u1edf v\u00f9ng l\u1ea1nh gi\u00e1 kh\u1eafc nghi\u1ec7t v\u00e0 c\u00e1c ph\u01b0\u01a1ng ti\u1ec7n ho\u1ea1t \u0111\u1ed9ng \u1edf v\u00f9ng l\u1ea1nh gi\u00e1 kh\u1eafc nghi\u1ec7t.<\/span><\/span><\/p>\n

2.2 T\u00e1c \u0111\u1ed9ng ti\u00eau c\u1ef1c \u0111\u1ebfn v\u1eadt li\u1ec7u phi kim lo\u1ea1i c\u1ee7a thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed<\/span><\/span><\/span><\/h2>\n

Nh\u1ef1a, cao su v\u00e0 c\u00e1c s\u1ea3n ph\u1ea9m phi kim lo\u1ea1i kh\u00e1c c\u1ee7a d\u1ee5ng c\u1ee5 \u0111i\u1ec7n t\u1eed s\u1ebd b\u1ecb c\u1ee9ng, n\u1ee9t v\u00e0 gi\u00f2n trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, v\u00e0 \u0111\u1ed9 b\u1ec1n s\u1ebd gi\u1ea3m \u1edf m\u1ed9t m\u1ee9c \u0111\u1ed9 nh\u1ea5t \u0111\u1ecbnh, v\u00e0 s\u1ebd m\u1ea5t \u0111i \u0111\u1ed9 \u0111\u00e0n h\u1ed3i ban \u0111\u1ea7u, \u0111i\u1ec1u n\u00e0y s\u1ebd l\u00e0m suy y\u1ebfu kh\u1ea3 n\u0103ng b\u1ecbt k\u00edn c\u1ee7a d\u1ee5ng c\u1ee5 \u0111i\u1ec7n t\u1eed v\u00e0 ch\u1ee9c n\u0103ng gi\u1ea3m nhu c\u1ea7u c\u1ee7a cao su, ho\u1eb7c th\u1eadm ch\u00ed h\u1ecfng. V\u1ecb tr\u00ed c\u1ee7a nh\u1ef1a d\u01b0\u1edbi \u1ee9ng su\u1ea5t v\u00e0 d\u1ec5 g\u00e3y. V\u00ed d\u1ee5, d\u1ee5ng c\u1ee5 \u0111i\u1ec7n t\u1eed \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p d\u1ec5 r\u01a1i ra do c\u00e1c b\u1ed9 ph\u1eadn k\u1ebft c\u1ea5u b\u1eb1ng nh\u1ef1a b\u1ecb gi\u00f2n v\u00e0 g\u00e3y sau khi ch\u1ecbu \u1ee9ng su\u1ea5t va \u0111\u1eadp \u1edf m\u1ee9c \u0111\u1ed9 th\u1ea5p, d\u1eabn \u0111\u1ebfn d\u1ee5ng c\u1ee5 \u0111i\u1ec7n t\u1eed kh\u00f4ng th\u1ec3 s\u1eed d\u1ee5ng b\u00ecnh th\u01b0\u1eddng.<\/span><\/span><\/p>\n

2.3 T\u00e1c \u0111\u1ed9ng x\u1ea5u \u0111\u1ebfn c\u00e1c linh ki\u1ec7n \u0111i\u1ec7n t\u1eed<\/span><\/span><\/span><\/h2>\n

\u0110i\u1ec7n dung, \u0111i\u1ec7n tr\u1edf v\u00e0 c\u00e1c th\u00f4ng s\u1ed1 hi\u1ec7u su\u1ea5t kh\u00e1c c\u1ee7a c\u00e1c linh ki\u1ec7n \u0111i\u1ec7n t\u1eed s\u1ebd thay \u0111\u1ed5i do m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, t\u1eeb \u0111\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb \u0111o l\u01b0\u1eddng, h\u1ec7 th\u1ed1ng \u0111i\u1ec1u khi\u1ec3n t\u1ef1 \u0111\u1ed9ng, thi\u1ebft b\u1ecb \u0111i\u1ec7n v\u00e0 d\u1ee5ng c\u1ee5.<\/span><\/span><\/p>\n

2.4 Co ng\u00f3t l\u1ea1nh do m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p<\/span><\/span><\/span><\/h2>\n

Trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, h\u1ea7u h\u1ebft c\u00e1c v\u1eadt li\u1ec7u d\u1ee5ng c\u1ee5 \u0111i\u1ec7n t\u1eed s\u1ebd t\u1ea1o ra hi\u1ec7n t\u01b0\u1ee3ng co ng\u00f3t l\u1ea1nh nh\u1ea5t \u0111\u1ecbnh v\u00e0 hi\u1ec7n t\u01b0\u1ee3ng co ng\u00f3t l\u1ea1nh c\u1ee7a v\u1eadt li\u1ec7u d\u1ee5ng c\u1ee5 \u0111i\u1ec7n t\u1eed s\u1ebd g\u00e2y ra nh\u1eefng t\u00e1c \u0111\u1ed9ng ti\u00eau c\u1ef1c sau:<\/span><\/span><\/p>\n

(1) S\u1ef1 ph\u1ed1i h\u1ee3p gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed v\u00e0 m\u00e1y m\u00f3c s\u1ebd thay \u0111\u1ed5i kh\u00f4ng li\u00ean t\u1ee5c, v\u00e0 ho\u1ea1t \u0111\u1ed9ng l\u00e0m vi\u1ec7c t\u01b0\u01a1ng \u0111\u1ed1i c\u1ee7a m\u00e1y m\u00f3c s\u1ebd tr\u1edf n\u00ean ch\u1eadm ch\u1ea1p, th\u1eadm ch\u00ed b\u1ecb k\u1eb9t;<\/span><\/span><\/p>\n

(2) S\u1ef1 co ng\u00f3t l\u1ea1nh c\u1ee7a v\u1eadt li\u1ec7u d\u1ee5ng c\u1ee5 \u0111i\u1ec7n t\u1eed s\u1ebd l\u00e0m cho c\u00e1c b\u1ed9 ph\u1eadn li\u00ean quan c\u1ee7a d\u1ee5ng c\u1ee5 b\u1ecb bi\u1ebfn d\u1ea1ng ho\u1eb7c th\u1eadm ch\u00ed b\u1ecb g\u00e3y;<\/span><\/span><\/p>\n

(3) S\u1ef1 co ng\u00f3t c\u1ee7a v\u1eadt li\u1ec7u d\u1ee5ng c\u1ee5 \u0111i\u1ec7n t\u1eed sau khi l\u00e0m m\u00e1t tr\u01b0\u1edbc s\u1ebd \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn \u0111\u1ed9 ch\u00ednh x\u00e1c th\u1eed nghi\u1ec7m c\u1ee7a d\u1ee5ng c\u1ee5, sau \u0111\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn k\u1ebft qu\u1ea3 \u0111o l\u01b0\u1eddng, th\u1eadm ch\u00ed d\u1eabn \u0111\u1ebfn tai n\u1ea1n an to\u00e0n.<\/span><\/span><\/p>\n

2.5 V\u1ea5n \u0111\u1ec1 \u0111\u00f3ng b\u0103ng v\u00e0 ng\u01b0ng t\u1ee5<\/span><\/span><\/span><\/h2>\n

Trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed c\u00f3 th\u1ec3 g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng ng\u01b0ng t\u1ee5 v\u00e0 \u0111\u00f3ng b\u0103ng h\u01a1i n\u01b0\u1edbc, d\u1eabn \u0111\u1ebfn nh\u1eefng t\u00e1c \u0111\u1ed9ng ti\u00eau c\u1ef1c sau:<\/span><\/span><\/p>\n

(1) Trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, h\u01a1i n\u01b0\u1edbc s\u1ebd t\u1ea1o th\u00e0nh s\u01b0\u01a1ng m\u00f9 tr\u00ean b\u1ec1 m\u1eb7t th\u1ea5u k\u00ednh c\u1ee7a d\u1ee5ng c\u1ee5 quang h\u1ecdc, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t quang h\u1ecdc c\u1ee7a ch\u00fang;<\/span><\/span><\/p>\n

(2) Trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, n\u1ebfu h\u01a1i n\u01b0\u1edbc ng\u01b0ng t\u1ee5 tr\u00ean l\u1edbp c\u00e1ch \u0111i\u1ec7n c\u1ee7a m\u1ea1ch ngu\u1ed3n v\u00e0 b\u1ea3ng m\u1ea1ch c\u1ee7a thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed s\u1ebd g\u00e2y ra s\u1ef1 c\u1ed1 r\u00f2 r\u1ec9 ho\u1eb7c \u0111o\u1ea3n m\u1ea1ch, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng b\u00ecnh th\u01b0\u1eddng trong c\u00e1c tr\u01b0\u1eddng h\u1ee3p nh\u1eb9 v\u00e0 g\u00e2y ra s\u1ef1 c\u1ed1 an to\u00e0n trong tr\u01b0\u1eddng h\u1ee3p nghi\u00eam tr\u1ecdng;<\/span><\/span><\/p>\n

(3) Trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, n\u1ebfu b\u00ean trong c\u00e1c b\u1ed9 ph\u1eadn chuy\u1ec3n \u0111\u1ed9ng b\u1ecb \u0111\u00f3ng b\u0103ng do h\u01a1i n\u01b0\u1edbc, ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u1ea5u tr\u00fac c\u01a1 h\u1ecdc chuy\u1ec3n \u0111\u1ed9ng s\u1ebd d\u1eebng l\u1ea1i v\u00e0 ch\u1ee9c n\u0103ng s\u1ebd b\u1ecb h\u1ecfng.<\/span><\/span><\/p>\n

3. C\u00f4ng ngh\u1ec7 th\u1eed nghi\u1ec7m m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p<\/span><\/span><\/strong><\/span><\/h1>\n

3.1 Y\u00eau c\u1ea7u ki\u1ec3m tra<\/span><\/span><\/span><\/h2>\n

N\u1ed9i dung ch\u00ednh c\u1ee7a nghi\u00ean c\u1ee9u th\u1eed nghi\u1ec7m nhi\u1ec7t \u0111\u1ed9 th\u1ea5p c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed bao g\u1ed3m nghi\u00ean c\u1ee9u m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a m\u1ed9t s\u1ed1 linh ki\u1ec7n \u0111i\u1ec7n t\u1eed trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, nghi\u00ean c\u1ee9u m\u1ed9t s\u1ed1 thi\u1ebft b\u1ecb \u0111o c\u00f3 y\u00eau c\u1ea7u v\u1ec1 m\u00f4i tr\u01b0\u1eddng d\u1ecbch v\u1ee5 nhi\u1ec7t \u0111\u1ed9 th\u1ea5p v\u00e0 nghi\u00ean c\u1ee9u m\u1ed9t s\u1ed1 hi\u1ec7u su\u1ea5t c\u1ee7a m\u1ed9t s\u1ed1 thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p. Nh\u00ecn chung, kh\u1ea3 n\u0103ng th\u00edch \u1ee9ng c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb nh\u01b0 v\u1eady v\u1edbi m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p n\u1eb1m trong kho\u1ea3ng t\u1eeb 10 \u2103 \u0111\u1ebfn 40 \u2103<\/span><\/span><\/p>\n

3.2 M\u1ee5c \u0111\u00edch th\u1eed nghi\u1ec7m<\/span><\/span><\/span><\/h2>\n

M\u1ee5c \u0111\u00edch c\u1ee7a th\u1eed nghi\u1ec7m l\u00e0 \u0111\u1ec3 x\u00e1c minh kh\u1ea3 n\u0103ng th\u00edch \u1ee9ng c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed v\u1edbi nhi\u1ec7t \u0111\u1ed9 trong m\u1ed9t ph\u1ea1m vi nh\u1ea5t \u0111\u1ecbnh.<\/span><\/span><\/p>\n

(1)Th\u00f4ng th\u01b0\u1eddng, ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9 l\u01b0u tr\u1eef l\u00e0 -40 \u2103 ~60 \u2103;<\/span><\/span><\/p>\n

(2) N\u00f3i chung, ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng gi\u1edbi h\u1ea1n l\u00e0 -10 \u2103 ~50 \u2103;<\/span><\/span><\/p>\n

(3) Th\u00f4ng th\u01b0\u1eddng. Ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9 d\u1ecbch v\u1ee5 \u0111\u1ecbnh m\u1ee9c l\u00e0 0 \u2103 ~40 \u2103.<\/span><\/span><\/p>\n

\n
<\/div>\n
<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Hi\u1ec7n nay, c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c l\u0129nh v\u1ef1c qu\u00e2n s\u1ef1, d\u00e2n s\u1ef1 v\u00e0 c\u00f4ng ngh\u1ec7 cao. Tuy nhi\u00ean, m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p t\u1ed3n t\u1ea1i trong h\u1ea7u h\u1ebft c\u00e1c m\u00f4i tr\u01b0\u1eddng d\u1ecbch v\u1ee5 c\u1ee7a n\u00f3. Do \u0111\u00f3, kh\u1ea3 n\u0103ng th\u00edch \u1ee9ng c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed \u1edf nhi\u1ec7t<\/p>\n","protected":false},"author":1,"featured_media":19826,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[88],"tags":[],"class_list":["post-19825","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc-cong-nghe"],"acf":[],"_links":{"self":[{"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/posts\/19825","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/comments?post=19825"}],"version-history":[{"count":2,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/posts\/19825\/revisions"}],"predecessor-version":[{"id":22065,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/posts\/19825\/revisions\/22065"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/media\/19826"}],"wp:attachment":[{"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/media?parent=19825"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/categories?post=19825"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dgbellvietnam.com\/en\/wp-json\/wp\/v2\/tags?post=19825"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}