INSTRUCTION MANUAL Contents ATD-5540 AUTOMOTIVE MULTIMETER INSTRUCTIONS -1 Safety 1 Meter Basics 4 Meter Functions 4 Voltage(V) ………………………………………………… 6 Resistance( Ω ) 7 Diode Check( ) 8 Audible Continuity( ) 9 DC Current(A) 10 RPM( ) 11 Frequency(Freq) 12 Dwell( ) 13 Duty Cycle(%) 14 Maintenance 15 Fuse and Battery Replacement 15 Trouble Shooting 16 General Specifications 16 Electrical Specifications Warranty Information 17 0 20
Safety Cont ’d… Safety DANGER Danger Engines produce carbon monoxide which is odorless, causes slower reaction time, and can lead to serious injury. When the engine is operating, keep service areas WELL VENTILATED or attach the vehicle exhaust system to the shop exhaust removal system. Set the parking brake and block the wheels before testing or repairing the vehicle. It is especially important to block the wheels on front-wheel drive vehicles; the parking brake does not hold the drive wheels.
Safety Cont’d… Meter Basics IMPORTANT To maintain accuracy of the meter, replace the discharged battery immediately when the battery symbol appears on the meter display. 1. Display: Large 3 1/2 digit (1999 counts) LCD display with low battery Avoid measuring error from outside interference: keep the meter away from spark plug or coil wires. Avoid damaging the meter when testing voltage: disconnect the test leads from the test points before changing functions.
Meter Functions-Voltage (DCV) The meter will automatically select the best voltage (V) range. Insert: Black lead in COM terminal. Red lead in V-Ω-RPM terminal Touch the Black probe to ground or to the negative (-) circuit. Touch the Red probe to the circuit coming from the power source IMPORTANT: voltage must be measured in parallel (Red probe measuring circuit from power source). Accuracy Selection of a lower range will move the decimal point one place and increase the accuracy.
Meter Functions – Resistance (Ω) IMPORTANT:If you are testing an application that has capacitors in the circuit, be sure to turn the power OFF on the test circuit and discharge all capacitors. Accurate measurement is not possible if external or residual voltage is present. Select the resistance( Ω ) range with the rotary switch. Insert: Black lead in COM terminal. Red lead in V-Ω-RPM terminal. Touch the test lead probes across the resistor to be tested.
Meter Functions – Audible Continuity ( ) Meter Functions DC Current (A) IMPORTANT : All current measured flows through the meter. It is important that you do not: Measure current greater than 600 Volts AC or DC, with respect to ground. Exceed 60 seconds when measuring continuous current between 1A-10A. Allow five minutes for cool down before continuing. IMPORTANT: Turn the power OFF on the test circuit Select the Audible Continuity ( ) range with the rotary switch.
Meter Functions-RPM/x10RPM Select the RPM range with the rotary switch. or Select the x 10RPM range with the rotary switch (1,000 to 12,000 RPM). Multiply the displayed reading times by ten to get actual RPM. Insert the inductive pickup connecting terminal into the meter. Ground lead in COM terminal. Meter Functions-Frequency(Hz) Select the Frequency(Freq) setting with the rotary switch. Set the rotary switch to the Frequency range that gives the most accurate measurement reading.
Meter Functions-Dwell Select the proper Dwell range with the rotary switch. Meter Functions-Duty Cycle (%) Insert: Select the % Duty Cycle range with the rotary switch. ·Black lead in COM terminal. Insert: ·Red lead in V-Ω-RPM terminal. Connect the Black test probe to ground. ·Black lead in COM terminal. ·Red lead in V-Ω-RPM terminal. Connect the Red test probe to the wire that connects to the breaker points(see illustration). Connect the Black test probe to ground.
Maintenance Trouble Shooting Fuse and Battery Replacement 1. Meter wilI not turn ON. Check the battery contacts for a tight fit. Check for a minimum battery voltage of 8.0 volts. WARNING: Avoid electrical shock: remove test leads before opening case. Do not operate the meter or rotate the meter switch when the case is open. 1. To replace a battery or fuse, loosen the three screws in the case back and remove the case by lifting up and forward . 2. Replace the battery with an 9 Volt alkaline battery.
at<70% R.H. Storage Environment : -20℃to 60℃ (-4 0F to140 0F ) at<80%R.H Temperature Coefficient : 0.2×(specified accuracy ) / ℃ ( < 18 ℃ or > 28℃ ). Power : Single standard 9 Volt battery (NEDA 1604 or lEC6F22). Battery Life : 200 hours typical with alkaline battery. Fuse : 10A/600V,6.3×25mm fast acting ceramic type. Dimensions : 147mm(H)×70mm(W)×39mm(D). Weight : Approx.222g(Meter Only),355g(With Holster). %DUTY CYCLE Ranges:1.0%-90.0% Resolution:0.1% Pulse width:>100us,<100ms Accuracy:±(2.
Input protection:10A/250V fast acting ceramic fuse on 10A input RESISTANCE Ranges : 200Ω, 2KΩ, 20KΩ, 2MΩ, 20MΩ AUDIBLE CONTINUITY Audible threshold : Less than 50Ω Resolution:100mΩ Overload protection:250VDC or RMS AC Resolution : 100m Accuracy :±(0.8%rdg+3dgts) on 200Ω ±(0.8%rdg+2dgts) on 2KΩ to 2MΩ ranges ±(1.5%rdg+5dgts) on 20MΩ ranges Overload protection:250VDC or RMS AC FREQUENCY Ranges : 200Hz, 2000Hz, 20KHz Resolution : 0.1Hz Accuracy :±(1.0%rdg+4dgts) on all ranges Sensitivity : 3.5V RMS min.
