MEGABRAS MTD-20KWe 數字接地電阻測試儀The MTD-20KWe digital earth tester allows for the measurement of Earth Resistances and Soil Specific Resistivity, and also the spurious voltages caused by parasitic voltages present in the soil.This equipment is suitable for fast and easy measurement of the grounding resistance in house and industrial buildings, hospital installations, lightning rods, antennas, substations, etc. Soil resistivity measurement allows for soil stratification in order to optimize the most complex grounding systems engineering.Its state-of-the-art system of active and passive filters provides it with high immunity to electric interferences, making it possible to obtain reliable measurements even in the presence of spurious voltages, such as the ones that can be found in some urban areas and near primary substations.A 1,470 Hz internal generator injects alternated current on the soil through an auxiliary rod. The voltage generated over the earth resistance is measured by the apparatus, and the resistance value is evaluated. The test current is automatically regulated.It has an audible signal which advises the operator when the generated current is not enough to carry out reliable measurements. Due to the fact that it may not be noticed, this alarm also prevents further testing. Because of its wide range of measurement (from 0.01 Ω up to 20 kΩ), this equipment allows for reliable testing in all kinds of soils, including those that offer very high resistivity. The use of this instrument is very simple, it has a high-visibility 3? - digit display with direct readings, even under sunlight.This earth tester is supplied with a rechargeable internal battery. The smart charger is microprocessor-controlled, and can be powered from a 12 V car battery (or a similar one).It has a sturdy, easy and safe to carry cabinet, with IP54 protection level. It is suitable to work under adverse geographical and environmental conditions, with extreme temperatures in cold or tropical regions and in high mountain areas, showing a reliable performance in the field.3? digits displayEarth Resistence measurementSpurious voltage measurementResolution: 0.01 ΩResistence reading: up to 20 kΩAudible signal indicates anomalies in the current circuitAccessories4 Steel rods (50 cm). 1 Rod extraction tool.1 AC adapter for the battery charger.1 Connection cable to use an external 12 V battery (car battery or similar) to charge the internal battery.1 40 m red lead (on spool).1 20 m blue lead (on spool).1 20 m green lead (on spool).1 5 m black lead.1 5 m green lead.1 Mallet.1 Tape measure.1 Carrying bag.1 User guide.
Megger DLRO10HD 10A低阻歐姆表高或低輸出功率選擇作情況診斷 可充電電池或電源線供電，即使電池沒電也能持續操作 60秒內達至10 A，等候冷卻時間短，電感充電佳 輸入保護至600 V，疏忽連接至主電源或UPS電壓不同燒保險絲 重型使用：IP 65蓋合上，IP54操作時(只適用于電池操作) 旋轉開關可選取五個測試模式的其中一個，包括連接時自動開始，讓使用更容易不論是在家居、實驗室、工作間或在野外，Megger新的重型DLRO10HD低阻姆歐表結合了堅固的結構、高準確度和容易使用，設備內置可充電電池，同時也可從主電源操作。DLRO10HD可應用于低電阻值的場合，從鐵路和飛機到工業中的電阻性元件。DLRO10HD可測試所有的金屬連接點，但是用戶必須認識到各個應用的測試局限性。比如，如果電纜制造商打算測試一條細導線的電阻，應該選擇低的測試電流，防止因導線發熱而改變電阻。在測試電動機和發電機這類電感性設備時，用戶需要理解感性模式下的充電過程，以便得到一個正確的結果。DLRO10HD由于有10A的250mΩ的電阻測試能力，因此適合于測試粗導體、連接以及焊接位置的質量。測試導線的電磁干擾會影響讀數。噪聲的標記會提醒用戶，防止在超過儀器規定的噪聲下進行測試。當不同的金屬連接在一起時會產生熱耦合效應。用戶需要選擇雙向模式來確保抵消這種效應。儀器在兩個電流方向進行測試，并取平均。常規模式在完成導線連接后，通過按下面板上的Test按鈕開始一次測試。所有四個連接的連續性會被自動檢查，正反向電流會自動施加，并將結果顯示出來。自動模式下只要探頭連接完成就會立即開始測試。對連接的樣品進行正反向電流測試，而后顯示平均值。這種模式非常適合與標配的DH4測試夾配合使用。探頭每次連接到負載上就會執行一次新的測試，無需按下測試按鈕。測量模式自動單向模式為加快測試進程僅施加一個方向的電流。然而不同金屬連接處的熱電動勢會導致精度降低。當探頭連接試品時測試自動開始。連續模式可以對同一個試樣進行多次測量。只需連接測試導線并按下測試按鈕，測試就會每隔3秒自動刷新直到電路斷開。電感性被測物體如發電機和電動機的電阻測試可選用電感模式。當測試感性試樣時，必須要等電壓穩定后也就是感性元件充電完成后才能進行測量。測試導線應接緊試樣并按下測試按鈕，儀器就會給試樣輸入一個單向的選定電流，不斷地讀取電壓的穩定過程中逐漸降低靠近真值的讀數。用判斷結果穩定后，按下測試鍵終止測試。Item (Qty) Order No.DLRO10HD Low Resistance Ohmmeter：1000-348Included accessoriesDH4 duplex handspike 1.2m 6111-503Test lead pouch (lid mounted) 1000-036DLRO10HD user guide CD 1000-869Warranty book. 6170-618Optional Accessories at extra costCalibration Shunt,10 Ω, current rating 1 mA. ：249000Calibration Shunt, 1 Ω, current rating 10 mA. ：249001Calibration Shunt, 100 mΩ current rating 1A. ：249002Calibration Shunt, 10 mΩ current rating 10 A. ：249003Certificate of Calibration for Shunts, NIST：CERT-NISTReplacement tips for DH4 and DH5 handspikes.Needle point：25940-012Serrated end：25940-014Optional Test Leads at extra cost:Duplex Leads DH5 straight duplex handspikes (2). One has indicator lights. 2.5m/8ft 6111-517Terminal cover (use in conjunction with DH4 test leads supplied as standard, or optional DH5 test leads for CATIII 300 V compliance) 1002-390
SMC PRIME 600 MicroOhmmeter微歐姆計表Product HighlightsThe use of micro ohmmeters with 4-wire measurement method is a common procedure in the power field for low resistance measurements (in micro ohms and milliohms range), with the purpose of detecting and preventing future problems; it is performed in breakers, switchgear, busbars joints, switching contacts and critical connections, as well as also used in any other metallic connection checks of other installations in different industries.The PRIME 600 is a micro ohmmeter that integrates both the contact resistance and the dynamic resistance measurement (DRM) as stand-alone unit; the dynamic resistance test, which is essential in analyzing the wear of the arcing contacts in SF6 and vacuum breakers, is a function never found before in micro-ohmmeters, so that with the PRIME is not required to combine several equipment for the complete static and dynamic resistance analysis, becoming an ideal option for circuit breaker testing.The PRIME plot the DRM time/resistant curve that describes the resistance changes on the measured spot throughout a few milliseconds, for detecting contact anomalies and wear; the analysis of the relevant characteristics and values of this curve is an effective diagnostic way of the internal condition of the breaker contacts, and reveals potential problems related to the arcing contact condition without having to open the chamber.The nature and dimensions of the electrical installations impose the need of accurate, high current injection, with the required high power, for obtaining reliable measurements throughout the entire setup; the injection range of the PRIME reach up to 600 A with pure DC generation (no ripple), which eliminates resistance distortions in elements with significant inductive characteristic, for example when checking a whole busbar and the resistance measurement could be affected by the nature of the DC injected; this high current micro ohmmeter features the higher power on the market (6 Vdc at 600 Adc) which enables for longer leads, less connections problems, and more accurate measurements.The PRIME microohmeter provides an easy and intuitive use with touch screen and several pre-defined test modes, reducing the testing time; at the beginning of any test, the equipment checks for proper connectivity of the system, warning of possible connection mistakes; for increased safety, the Prime 600 demagnetizes the connected load at the end of each measurement.The micro ohmmeter includes the easy generation of test reports, with direct printing on field through the built-in thermal printer, or saved to USB or PC with the PrimeSync software for grouping tests in a nice report exportable to office formats in PC.For higher accuracy and being possible to compare the results measured at determined temperature with the standard values, the option of a temperature sensor, which transmits the temperature of the tested spot to the Prime 600, allows for results normalization in temperature.An optional dual ground clamp accessory eliminates the need to remove the ground protection and speeds up the measurement process with a dual ground test method.The high quality of the robust IP67 protective case also ensures the safe transport and use on harsh environments.CHARACTERISTICSDynamic Resistance MeasurementDual ground operationAutomatic de-magnetization functionAlert on connection mistakesTouch-sensitive graphical displayPre-defined test modesBuilt-in thermal printerRemovable USB storagePC download and reportingSturdy, water proof ABS casing, IP67Temperature normalizationAPPLICATIONSCircuit breaker contact resistance measurement according to ANSI C37.09-1979 (5.14), IEC 1208 and IEC 694 (6.4) standards.Quick, efficient condition evaluation of arc contacts in SF6 and vacuum insulated circuit breakers.Assessment of connection quality in cable attachments, busbars and any conductive joint in electrical installations.Winding resistance measurement in transformers.Continuity in switches, earth connections, welding points, fuses, etc.
FW Bell 8010單通道臺式高斯計帶背光的TFT彩色液晶顯示器WVGA，600 x 480像素提供40多種標準探頭自動探頭系數校正以Gauss, Tesla, amp/meter或Oe顯示相對模式完全菜單驅動，易于操作自動歸零和自動校準IEEE-488，RS-232，以太網RJ-45和USB接口CE-兼容制造符合IS0 9000標準全面的技術支持 FW Bell 8030三通道臺式高斯計帶背光的TFT彩色液晶顯示器WVGA，600 x 480像素提供40多種標準探頭三個通道自動探頭系數校正以Gauss, Tesla, amp/meter或Oe顯示相對模式完全菜單驅動，易于操作自動歸零和自動校準IEEE-488，RS-232，以太網RJ-45和USB接口CE-兼容制造符合IS0 9000標準全面的技術支持