ATD Tools ATD-5544 User's Manual
Contents
1. ATD 5544 INSTRUCTION MANUAL MINI DIGITAL MULTIMETER CAT Ill 200mA FUSED GENERAL Before attempting to operate the instrument become familiar with each control A thorough understanding of how the instrument operates will avoid undue mistakes and minimize measurement errors instrument damage and the possibility of personal injury FRONT PANEL DESCRIPTION CASE POWER SWITCH 3 1 2 DIGIT LCD DISPLAY FUNCTION AND RANGE SWITCH V Q mA JACK COM JACK SPECIFICATIONS GENERAL DISPLAY 3 1 2digit LCD with a max reading of 1999 POLARITY Automatic negative polarity indication ZERO ADJUSTMENT Automatic OVER RANGE INDICATION only the diigt 1 is displayed POWER 12V Alkaline Manganese button cells A23 El12 Japan or optional DIMENSIONS 100mm long x 48mm wide x 26mm thick NET WEIGHT 104g including battery OnakWN ELECTRICAL SPECIFICATIONS Accuracies are guaranteed for 1 year 23 C 5 C less than 75 RH DC VOLTAGE 200m 2V 20V 200V 500V 0 5 rdg 2d Impedance 1M ohm OVERLOAD PROTECTION 500V rms AC VOLTAGE 200V 500V 40Hz 400Hz 2 0 rdg 5d Impedance 450k ohm OVERLOAD PROTECTION 500V rms RESISTANCE 200 2000 20k 200k 2000k 1 5 rdg 4d DC CURRENT 2000 u 20m 200mA 2 0 rdg 2d OVERLOAD PROTECTION 200mA 250V fuse DIODE TEST Test current 1 6mA MAX Test voltage 3 2V MAX BATTERY TEST Range 9V Test current 6mA OPERATION e The mark 1 is for warni2. ng that the input voltage should not exceed the indicated values This is to prevent damage to the internal circuitry e The range switch should be set to the range which you want to test before operation DC VOLTAGE MEASUREMENT Set the FUNCTION and RANGE switch to desired DCV position and connect the test leads across the source of load under measurement If the test voltage is not known beforehand then set the range switch to the highest 500V range and work down The polarity of the red lead connection will be indicated at the same time as the voltage AC VOLTAGE MEASUREMENT Set the FUNCTION and RANGE switch to desired ACV position and connect the test leads across the source or load under measurement DC CURRENT MEASUREMENT Set the FUNCTION and RANGE switch to DCA position Connect test leads IN to a circuit turn RESISTANCE MEASUREMENT Set the FUNCTION and RANGE switch to desired ohm range if the resistance being measured is connected to a circuit turn off power and discharge all capacitors before applying probes DIODE TEST Set the FUNCTION and RANGE switch to 2k Diode position connect test leads across the diode RED probe to the anode of the diode and black to the cathode BATTERY TEST Set the FUNCTION and RANGE switch to BATT position Connect test leads to the terminals of the battery under test Read display value and decide if the battery is OK MAINTENANCE CAUTION Remove from any energized circuits t
3. o avoid shock hazard Fuse rarely need replacement and blow almost always as a result of operator error If BAT appears on display this indicates that the battery should be replaced To replace battery remove screw in the bottom of case remove the old and replace with a new one Be careful to observe polarity To replace Fuse 200mA 250V remove the screw in the bottom of the case simply remove the old and replace with a new one ESI 262 279 1400 www esitest com info esitest com
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