簡介
MPK254
- 解析度1μΩ；電阻讀值達200Ω；測試電流達5A。
- 採用Kelvin型4線式測量法。
- 使用可充電電池電源操作。
- 數位式直接讀值與顯示可達4½位數。
- 配備RS232串列資料輸出介面。
- 應用：為可攜式微處理器控制型數位超低阻歐姆計，輕量強固、耐撞擊、IP54防護等級（關閉上蓋時），可使用測試電流1mA～5A精準測量開關與斷路器接點、變壓器與馬達繞組、導線與電纜樣品及匯流排內的接頭…等的電阻。
- 微處理器控制型。
- 字母數字顯示幕。
- 解析度：1μΩ。
- 電阻讀值達：200Ω。
- 測試電流達：5A。
- 採用Kelvin型4線式測量法。
- 使用可充電電池電源操作。
- 數位式直接讀值與顯示可達4½位數。
- 配備RS232串列資料輸出介面。
- 應用：為可攜式微處理器控制型數位超低阻歐姆計，可使用測試電流1mA～5A精準測量開關與斷路器接點、變壓器與馬達繞組、導線與電纜樣品及匯流排內的接頭…等的電阻。
- 系統簡介：
- 採用Kelvin型4端點式測量法，可避免由測試導線及其接點電阻造成的測量誤差。
- 在字母數字顯示幕上顯示電阻讀值，可達4½位數解析度。
- 能以低至1µΩ的解析度，測量電阻達200Ω。
- 先進的信號放大系統，能確保測量精度 - 無偏移及具有長期穩定性。
- 配備RS232串列輸出介面，可將測量值傳送到串列印表機、筆記型電腦、掌上型電腦或任何資料蒐集器，以便記錄執行的測試。
- 讀值保持功能，可將螢幕上的測量值保持在某一個時間點上。
- 開路輸出電壓高達10V，依選擇的測試電流而定，當測量高電感性元件時（尤其是變壓器繞組），可縮短測試電流的穩定時間，而測量電路可有效保護防備由那些電感產生的電壓峰值。
- 操作極為簡單，只須連接導線►將儀器開機►選擇測試電流►按下開始按鈕►經過幾秒後（依元件的電感而定），螢幕上便顯示直接讀值與測量單位指示（Ω、mΩ或µΩ），如有必要，也將顯示例如低電池電量、過範圍…等輔助訊息給操作員。
- 儀器裝置在強固塑膠殼內，帶有鉸接上蓋及攜行把手。
- 可攜式、輕量強固、耐撞擊，適用於現場及惡劣的天氣條件下，能在實驗室與現場提供極為可靠和精準的測量結果。
- 測試電流：
- 1mA、10mA、100mA、1A、5A。
- 每個電流可從0到100%連續調整。
- 電阻範圍：
- 0～20mΩ@5A。
- 0～600mΩ@5A。
- 0～200mΩ@1A。
- 0～2000mΩ@100mA。
- 0～20Ω@10mA。
- 0～200Ω@1mA。
- 解析度：1μΩ@5A。
- 輸出電壓：開路電壓達10VDC＠1A。
- 測量原理：4端點，Kelvin型。
- 基本精度：±0.2% rdg.±2位數。
- 先進功能：
- 數位式直接讀取超低電阻值及顯示在螢幕上達4½位數。
- 超快速及精準的測量。
- 串列資料輸出：
- RS232@4800bps。
- 可將資料蒐集傳送到外部串列印表機、電腦或資料蒐集器。
- 防護等級：IP54，關閉上蓋時。
- 安全等級：符合IEC 61010-1標準的要求。
- 電源：內部可充電密封鉛酸電池12V - 7Ah。
- 內部電池充電器：適用於100-240V~主要電源。
- 體積/重量：378x308x175mm/8.7kg。
- 詳細規格、配件、軟體及選購，歡迎洽詢。
- Microprocessor controlled
- Alphanumerical display
- Resolution: 1 μΩ
- Resistance reading: up to 200 Ω
- Up to 5 A test current.
- Kelvin-type (4-wires) measurement
- Powered by rechargeable battery
- Direct reading (up to 4½ digits)
- Serial data output (RS232)
- Applications: The MPK-254 digital very low resistance ohmmeter is a portable, microprocessor-controlled instrument used to accurately measure resistances of switches and circuit breaker contacts, transformer and motor windings, wire and cable samples, joints in busbars, etc., using test currents from 1 mA up to 5 A.
- Description:
- It uses the Kelvin-type, four-terminals measurement principle, thus eliminating errors caused by lead and contact resistances.
- Resistance readings are shown in the alphanumeric display with up to a 4½ digit-resolution.
- It allows to measure resistances of up to 200 Ω, with a resolution down to 1 μΩ.
- Measurements accuracy is guaranteed by the state-of-the-art system for signal amplification, offset-free and with long-term stability.
- The equipment has a serial output (RS232) that allows to collect measured values in a printer, laptop, palm-top computer, or any data logger in order to register the tests performed.
- The Hold function keeps in the display the value measured at a certain time-point.
- The open circuit output voltage is of up to 10V, depending on the selected test current, reducing the stabilization time for the test current when highly inductive elements(especially transformers windings) are measured. The measurement circuit has an effective protection against voltage peaks originated by those inductances.
- Operation is very simple: Just connect the leads, switch-on the equipment, select the test current and press the start button. After a few seconds (depending on inductance of the element), direct reading appears on the display with the measure unit indication (Ω, mΩ or μΩ). If it is necessary, the display will show messages to help the operator (Low battery, Overrange, etc).
- The equipment is housed in a rugged plastic case with a hinged lid and carrying handle.
- It is a portable, strong, impact resistant and lightweight equipment, suitable to be used in outdoors and under severe weather conditions. It supplies very reliable and accurate measurements both in laboratory and out in the field.
- TEST CURRENTS:
- 1 mA, 10 mA, 100 mA, 1 A, 5A.
- Each current may be continuously adjustable from 0 to 100%.
- RESISTANCE RANGES:
- 0-20 mΩ @ 5 A.
- 0-600 mΩ @ 5 A.
- 0-200 mΩ @ 1 A.
- 0-2000 mΩ @ 100 mA.
- 0-20 Ω @ 10 mA.
- 0-200 Ω @ 1 mA.
- RESOLUTION: 1 μΩ@5 A.
- OUTPUT VOLTAGE: Up to 10 Vdc (open circuit) @ 1 A
- MEASUREMENT PRINCIPLE: Four-terminal, Kelvin-type.
- BASIC ACCURACY: ±0.2% of reading± 2 digits
- ADVANCED FEATURES:
- Digital direct reading of very low resistances in the alphanumerical display, with up to 4½ digits.
- Very fast and accurate measurements.
- SERIAL DATA OUTPUT:
- RS232 @ 4800 bps.
- Suitable for data collection in an external serial printer, computer or data-logger.
- ENVIRONMENTAL PROTECTION: IP54 with closed lid.
- SAFETY CLASS: Meets the requirements of IEC 61010-1.
- POWER SUPPLY: Internal rechargeable battery, sealed-lead, 12 V - 7 Ah
- BUILT-IN BATTERY CHARGER: For 100-240 V~ mains supply
- EQUIPMENT WEIGHT: Approx. 8.7 kg
- DIMENSIONS: 378 x 308 x 175 mm.
- Please feel free to contact for detailed specifications, accessories, software and options.