ACL表面电阻测试仪ACL-385
ACL-385表面电阻测试仪|美国ACL表面电阻测试仪|ACL-385表面阻抗测试仪是测量物体表面阻抗，将表放在被测表面上，按住红色的测量（TEST）按钮，持续发亮的发光二极管（LED）这种小巧袖珍型检测表既可测量表面阻抗，又可测量对地电阻，量程范围广，从103欧姆/□到1012欧姆/□，精度为±1/2量程。
ACL-385采用ASTM标准D-257平行电极传感方法，可以简便、重复地测量各种传导型、静电泄放型、绝缘型表面。
使用：
ACL-385表面电阻测试仪测量表面阻抗，将表放在被测表面上，按住红色的测量（TEST）按钮，持续发亮的发光二极管（LED）即指示出测量的表面阻抗量级。
103=1千欧姆 绿色LED
104=10千欧姆 绿色LED
105=100千欧姆 绿色LED
106=1兆欧姆 黄色LED
107=10兆欧姆 黄色LED
108=100兆欧姆 黄色LED
109=1000兆欧姆 黄色LED
1010=10000兆欧姆 黄色LED
1011=100000兆欧姆 黄色LED
1012=1000000兆欧姆 红色LED
>1012=绝缘 红色LED
测量对地电阻
将接地线插入接地（Ground）插座，这样绝缘了表的右侧检测电极（与插座在同侧）。将鳄鱼夹接到你的地线上。
将表放在被测表面上，按住测量（TEST）按钮，持续发光的LED指示出对地电阻值的量级。这个测量值的单位是欧姆。
ACL-385表面电阻测试仪参数：
电 源： 9伏PP3碱性电池
测量电压： 额定9伏
相对湿度： 0%～90%（无结露）
精 度： ±10%
重复误差： ±5%
重 量： 170克（60Z）
尺 寸： 127×76×26
ACL385表面阻抗表校准方法
校准周期：
每十二个月需校准ACL-385表面阻抗表。
采用十进电阻箱，将标准测量电阻跨接在ACL-385表的两个平行电极之间来检验其显示的阻抗值是否正确。
参数：
电源： 9伏PP3碱性电池
测量电压： 9伏
温度范围： 工作温度5摄氏度到49摄氏度
储藏温度： －15摄氏度到60摄氏度
相对湿度： 0％到90％(非结露状态)
测量度： 10的数量级
转变点： 1/2级对数(3.16×10n)
转变点精度： ±1/2级
精度： ±10％
重复性： ±5％
重量： 170克
尺寸： 130×70×25(毫米单位)
ACL385表面阻抗表校准步骤
ACL-385表采用的是1％超薄膜电阻和高速放大电路，其校准步骤是基于该产品的线性电路技术而进行的。
阻抗值的转换点为1/2级对数即3.16×10n，转换点的线性值为每测量档的中值(mean valueperunit)的±10％。
测量用仪器：十进电阻箱，测试电极
电阻箱的电阻需要有1×103欧姆到 999×106兆欧姆或109，测量大于109阻值时采用CAD技术(cadGeneratedtechniques)，因为采用9伏电压驱动很难验证阻抗值大于999×106的电阻。
将电阻箱的两个电极连接到ACL-385的两个平行电极上，将电阻调到1K位置，表的103发光二极管(LED)应亮，其它档的校准依此类推，测量阻抗转换点时，按下开关的同时连续调节阻抗电桥的阻抗值，并观察下一档LED灯常亮时的阻抗值(这时的值为转换阻抗值)。
英文说明：
Application and Use Instructions for Product: # 385 Surface Resistivity Meter ACL MODEL #385
CALIBRATION INSTRUCTIONS
CALIBRATION
The checker should be calibrated on average every 12 months. A test resistance can be applied across the parallel bars to verify if the checker is within specification, using a resistance decade box. Calibration can be obtained by contacting your supplier.
SPECIFICATION
Power Supply: 9-volt PP3 alkaline battery
Test Voltage: Nominal 9 volts
Temperature Range:
Operating 40?to 120?F (5?C to 49?C)
Storage (-15?C to + 60?C)
Relative Humidity: 0% to 90% (non-condensing)
Resolution: One order of magnitude
Changeover Point: ?decade on a logarithmic scale (3.16 x 10n)
Changeover Point Accuracy: ??decade
Accuracy: ?10%
Repeatability: ?5%
Weight: 6 ounces
Dimensions: 130mm x 70mm x 25mm
SURFACES RESISTANCE CHECKER CALIBRATION PROCEDURE
This product has been produced using 1% meta film resistors, and high speed OP-AMP Integrated circuits. The calibration procedure is based upon the product being of linear technology.
The changeover points are determined on resistance and are ??decade on a logarithmic scale i.e. (3.16 x 10n). The linearity of the changeover points is ?10 from the mean value per unit.
TEST EQUIPMENT USED
Resistance Decade Box
Test Leads
The resistance decade box required will need a range of from > 1 kilohm to 999 meg ohms or 10^9. Measurement greater than 10^9 are calculated using cad generated techniques, as high resistances greater than 109 are difficult to verify with a test voltage of 9 volts.
Connect the test leads from the resistance decade box to the test probes of the checker, set the decade box to the desired resistance i.e. 10^3 = 1 K, then press and hold the checker's test button, the 10^3 LED should light, 10 K 10^4 LED should light and so on. To measure the changeover point between decades, increase the resistance of the decade box while pressing the checker's test button. Record the resistance when the next LED lights permanently (this is the changeover resistance).
Example: The first green LED is illuminated 10^3 = 1 kilohm.
At 3 or 4 kilohms 10^4 LED is illuminated, the changeover point is 3 or 4 kilohms. 10^4 = 10 kilohms so between 3 or 4 kilohms and 30 or 40 kilohms will be the changeover points from 10^4 to 10^5.
Please note that the checker has no internal parts to adjust, so verification of calibration
can be achieved by using the above process. If verification cannot be achieved the unit
should be returned to the supplier.