AEMC MR561 User Manual

AEMC MR561 User Manual Manual pdf 16 page image

14 AC/DC Current Probe Models MR461 and MR561CHAPTER 4OPERATION4.1 Making Measurements• Connect the current probe to the proper input channel on the oscil-loscope.• Begin with the least sensitive range on the current probe (1mV/A).• Select the 0.5V/Division on your oscilloscope.• Turn oscilloscope power on. Turn on the Model MR461/561. Thegreen LED should be on, the red LED should be off. If the greenindicator does not come on or goes off before the probe has oper-ated for 10 minutes, it is necessary to replace the battery.• After approximately 10 minutes of operation, if none of the con-trol buttons have been manipulated, power will automatically shutoff.4.1.1 DC Measurement• Select DC position on the oscilloscope.• “Zero” the probe. With the probe disconnected from test samples(no conductor in probe jaw window), press the auto zero button.The red LED (%) comes on for approximately three seconds toindicate that the probe is zeroing. If the red LED remains lit, thisindicates that zero has not been attained – repeat the zeroingoperation. Alternatively, you may “zero” with the oscilloscope.• For best accuracy, especially on low-level measurement, it is recom-mended that you zero the probe before each measurement.• Clamp the probe around the conductor to be tested. The oscillo-scope should now display the measured conductor current. A posi-tive reading indicates current flowing in the direction of the arrowlocated on the side of the jaw. A negative reading indicates currentflow in the opposite direction of the arrow. Multiply the conversionratio (1mV/A or 10mV/A) times the V/Division range on your oscil-loscope to get the value of the current.www.ShopAEMC.caShop for AEMC products online at: 1.800.561.8187