ارت سنج دیجیتال چهارترمیناله پیشرفته مستک مدل MS2308

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ارت سنج دیجیتال چهارترمیناله پیشرفته مستک مدل MS2308
چاه ارت (EARTH) :
برای حفاظت از برخورد آذرخش و اتصال الکتریسیته به بدنه فلزی هر وسیله موجود در منزل و کارگاه که به برق وصل می‌شود و در اثر تماس انسان برای وی خطر ایجاد می‌کند معمولاً بهترین راه احداث چاه ارت (چاه زمین‌کاری) است. برای این کار چاهی با مشخصات استاندارد ایجاد می شود و تعدادی سیم توسط الکترود از آن خارج می شود و به سیستم حفاظتی ساختمان متصل می شود . همچنین مقاومت این سیم ها می بایست بسیار کم و در حد چند اهم باشد . نتیجه این کار به این صورت است که اگر صاعقه به ساختمان بزند از طریق یک میله به زمین منتقل می‌شود و یا اگر سیم برق به بدنه فریزر ماشین لباسشویی و غیره وصل شود قبل از اینکه برای انسان خطری ایجاد کند به زمین منتقل می‌شود و خلاصه با ایجاد سیستم زمین کردن خطر برق گرفتگی از بین می‌رود ضمناً در دو شاخه‌های جدید و پریزها جدید بجز سیم نول و فاز یک سیم دیگر وجود دارد و آن هم همین سیم ارت است . در اثر برخورد صاعقه به ساختمانی که سیستم ارتینگ ندارد معمولاً کامپیوتر ، تاسیسات ساختمان و غیره آسیب می‌بینند .

همچنین برای کار های مخابراتی نیز سیستم چاه ارت به کار می رود که توسط این چاه یکی از سیم های خطوط انتقال حذف و مدار از طریق زمین بسته می شود . یکی دیگر از کاربرد های چاه ارت هم پتانسیل کردن یک نقطه برای تمامی سیستم ها می باشد که با این کار باعث می شود تمامی وسایل الکتریکی دارای نقطه مرجع مشترک و هم پتانسیل باشند . در پست های برق نیز نقطه وسط ترانس 3 فازه به زمین متصل می گردد که این کار موجب افزایش امنیت سیستم ، حفاظت از سیستم برق رسانی و جلوگیری از نا متعادل شدن خطوط برق رسانی می شود .

ارت سنج (EARTH Tester - EARTH Meter) :
طبق استاندارد برای هر کاربرد مشخصی ، میزان مقاومت زمین مشخصی نیز تعریف شده که ارت تستر ابزاری برای اندازه گیری این مقاومت الکتریکی می باشد و در تمامی کاربرد های نام برده از آن استفاده می شود . متخصصان توسط این ابزار ارزشمند می توانند میزان مقاومت الکتریکی زمین در هر نقطه را اندازه گیری و تنظیم بکنند .

به طور معمول ارت سنج ها به دو دسته الکترودی و کلمپ تقسیم می شوند که در نوع الکترودی نیاز به اتصال الکترود و الکترود کمکی به سیستم حفاظتی احداث شده می باشد و در نوع دیگری نیازی به اتصال فیزیکی نبوده و کافی است سیم را از درون انبر دستگاه عبور داده و میزان مقاومت را اندازه گیری نمایید . همچنین این دستگاه ها دارای مدل های پیشرفتی تری می باشند که می تواند به هر دو روش و یا به صورت ترکیبی و چند سیمه میزان مقاومت را اندازه گیر نمود .

ارت سنج دیجیتال چهارترمیناله پیشرفته مستک مدل MS2308
                                                                                                      


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مشخصات فنی ارت سنج دیجیتال چهارترمیناله پیشرفته مستک مدل MS2308

مشخصات
مقاومت
رنج 0.02Ω ~ 300KΩ
سایر مشخصات
سایر قابلیت ها اتصال به کامپیوتر توسط کابل USBتوسط آدابتور مربوطه - دارای حافظه داخلی
ویژگی ها قابلیت اندازه گیری به روش های 3pole,4pole,3pole & 4pole , 3pole & 4pole with Current Clamp,Double Clamps,R~2pole, R~2/4pole,RK
استاندارد ایمنی CAT.III 300V
کشور سازنده چین
اقلام همراه کیف حمل ، پراب ، دو کلمپ ، باطری ، سیم و میله اندازه گیری کمکی ، آداپتور
ابعاد
ارتفاع 284mm
عرض 230mm
عمق 125mm
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0.0000050068 SELECT a.articles_id, a.articles_image, GREATEST(a.articles_date_added, COALESCE(a.articles_date_available, 0)) AS articles_date, a.articles_authors_id, ad.articles_name, ad.articles_summary, ad.articles_viewed FROM articles AS a JOIN articles_description AS ad ON a.articles_id = ad.articles_id JOIN articles_xsell AS x ON a.articles_id = x.articles_id WHERE x.products_id = :id AND ad.language_id = :lng_id AND a.articles_status = 1 ORDER BY articles_date DESC
0.0023500919 SELECT a.articles_id, a.articles_image, GREATEST(a.articles_date_added, COALESCE(a.articles_date_available, 0)) AS articles_date, a.articles_authors_id, ad.articles_name, ad.articles_summary, ad.articles_viewed FROM articles AS a JOIN articles_description AS ad ON a.articles_id = ad.articles_id JOIN articles_xsell AS x ON a.articles_id = x.articles_id WHERE x.products_id = :id AND ad.language_id = :lng_id AND a.articles_status = 1 ORDER BY articles_date DESC
0.0000050068 SELECT p.pages_id, pd.pages_name FROM pages AS p, pages_description AS pd WHERE p.pages_status = '1' AND p.pages_id = pd.pages_id AND pd.language_id = :lng_id AND p.position_name = :position ORDER BY p.sort_order ASC, pd.pages_name ASC
0.0005111694 SELECT p.pages_id, pd.pages_name FROM pages AS p, pages_description AS pd WHERE p.pages_status = '1' AND p.pages_id = pd.pages_id AND pd.language_id = :lng_id AND p.position_name = :position ORDER BY p.sort_order ASC, pd.pages_name ASC
0.0000050068 SELECT p.pages_id, pd.pages_name FROM pages AS p, pages_description AS pd WHERE p.pages_status = '1' AND p.pages_id = pd.pages_id AND pd.language_id = :lng_id AND p.position_name = :position ORDER BY p.sort_order ASC, pd.pages_name ASC
0.0005300045 SELECT p.pages_id, pd.pages_name FROM pages AS p, pages_description AS pd WHERE p.pages_status = '1' AND p.pages_id = pd.pages_id AND pd.language_id = :lng_id AND p.position_name = :position ORDER BY p.sort_order ASC, pd.pages_name ASC
0.0000059605 SELECT p.pages_id, pd.pages_name FROM pages AS p, pages_description AS pd WHERE p.pages_status = '1' AND p.pages_id = pd.pages_id AND pd.language_id = :lng_id AND p.position_name = :position ORDER BY p.sort_order ASC, pd.pages_name ASC
0.0004720688 SELECT p.pages_id, pd.pages_name FROM pages AS p, pages_description AS pd WHERE p.pages_status = '1' AND p.pages_id = pd.pages_id AND pd.language_id = :lng_id AND p.position_name = :position ORDER BY p.sort_order ASC, pd.pages_name ASC
0.0000038147 SELECT p.pages_id, pd.pages_name, pd.pages_description, p.pages_image, p.pages_date_added FROM pages AS p JOIN pages_description AS pd ON pd.pages_id = p.pages_id WHERE p.pages_status = '1' and pd.language_id = :lang_id AND p.position_name = :position ORDER BY p.sort_order LIMIT :limit
0.0004301071 SELECT p.pages_id, pd.pages_name, pd.pages_description, p.pages_image, p.pages_date_added FROM pages AS p JOIN pages_description AS pd ON pd.pages_id = p.pages_id WHERE p.pages_status = '1' and pd.language_id = :lang_id AND p.position_name = :position ORDER BY p.sort_order LIMIT :limit
Total: 0.0321152210 Query count: 104