Keysight U1242C Service Manual

Also see for U1241C: Quick start guide User guide Quick start guide

Contents

Keysight U1242C Service Manual Manual pdf 47 page image

Calibration Procedures 1Keysight U1241C/U1242C Service Guide 47Vsense (non-contact voltage) calibration1 Turn the rotary switch to the position with shown on the display.2 Connect a dual open type banana plug into the output voltage terminals of thecalibrator.3 Ensure the “EARTH” button of the calibrator is turned ON.4 Ensure the top of the multimeter is vertically and horizontally centered tocontact the banana plug's Hi terminal.5 Set the source output to 10 V/55 Hz.6 Press to start the calibration. If the calibration is successful,will be displayed.DC A Open oPEn Open terminals10.000 A 10.000 A 0.7 to 1.3 x Reference valueAC A 10.000 A 1.000 A (55 Hz) 0.7 to 1.3 x Reference value10.000 A (55 Hz) 0.7 to 1.3 x Reference value[a] The sensor for the Vsense (non-contact voltage) calibration is located at the top center of the multimeter. Place the top area as close aspossible to the standard signal source without any loads.[b] — Set the 5520A to internal reference.— Prior to performing adjustment, connect one end of the K-type thermocouple (with miniature TC connector on both ends) to the 5520A TCoutput, and the other end to a precision thermometer to verify that the source outputs the desired value. Adjust the source accordingly ifnecessary.— To perform the adjustment, connect one end of the K-type thermocouple (with miniature TC connector on both ends) to the 5520A TCoutput, and the other end to the multimeter via a TC-to-banana adapter. Allow at least 1 hour for the multimeter to stabilize.Table 1-15 Adjustment input values (continued)Test function Step Reference value Valid reference inputNOTE – Keep the multimeter away from fluorescent lights, dimmable lights, motors,and other electrical noise sources when running the tests. These electricalnoise sources can invalidate the calibration.– It may be necessary in step 4 and step 8 below to slightly adjust the positionof the multimeter for maximum signal strength.VHoldLog