Prokit's Industries MT-1503 User Manual

MT-1503

SMART Multimeter

Instruction Sheet

Read First: Safety Information

To ensure that the tester is used safely, follow these instructions:

 Do not use the DMM if the tester or test leads appear damaged or if you suspect that the

DMM is not operating properly.

 Disconnect the live test lead before disconnecting the common test lead.

 When using the test leads, keep your fingers behind the finger guards on the test leads.

 Do not apply more than 600V rms between a DMM terminal and earth ground.

 Disconnect the test leads from the object circuit before measuring the voltage. The DMM

enters scan mode automatically. Then connect the test leads to the voltage. Do not connect

the test leads to the circuit first and then switch it on before the circuit is powered. If so, the

DMM will go to the resistance measure function first when it’s powered, and it’s easy to be

damaged or operated incorrectly when the power is suddenly switched on.

 Use caution when working with voltages above 60V dc or 30V AC rms. Such voltages pose a

shock hazard.

 The user is cautioned that failure to use this equipment in accordance with the manufacturer’s

instruction may be detrimental to the operation of this equipment and may impair any

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safeguards within this equipment.

1. Automatic Selection

 Insert the red test lead to the “V/OHM” jack, and the black test lead to the “COM” jack.

 When turned on, the DMM powers up in SCAN mode.”SCAn” will appear in the LCD. Test the object by 2 test

leads, you’ll get the tested AC, DC voltages or resistance.

 The DMM automatically selects the appropriate measurement mode and range.

 Without exterior voltage, the DMM shifts to resistance measure mode to measure it when the resistance in the

input terminals is below 40Mohm.

 Input DC voltage between +0.7V and +600V on the input terminals, or between -0.12V and -600V, or even AC

voltage between 3V and 600V (frequency between 40 Hz and 400Hz), then the DMM enters the corresponding

measure mode for DC voltage or AC voltage.

 In DC and AC voltage modes, the DMM has high input impedance (10MΩ).

 If the test leads are disconnected from the “V/OHM” jack and then connected to the “A” jack, it can be used as

a current meter. DMM enters its current measure mode automatically when the flowing current exceeds the

limited value(5mA).

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Resistance measurement

Refer to Automatic Selection.

Without exterior voltage, the DMM shifts to resistance measure mode when the resistance in the input terminal is

below 40MΩ.

The tested resistance will be shown with figures, accompanying corresponding units Ω，kΩ or MΩ. In resistance

measure mode, do not impose voltage on the test resistance or it may be damaged or operated incorrectly.

DC and AC Voltage measurement

Refer to Automatic Selection. When the Volts DC is above +0.7V or -0.12V, Volts AC is above 3Vrms, the DMM enters

volt measure mode automatically. The LCD will indicate the voltage with DC or AC and its shown with figures in the

corresponding units V or mV.

Change the test leads for the contacting point of the tested circuit if you want to test the DC voltage below 0.7V, you

can get the voltage of as low as 0.12V.

Warning

 When AC and DC voltage are simultaneously contained, the DMM will only show the voltage which has larger

virtual value (DC or AC)

 Continuously press SELECT key to the stable status of measuring DC or AC voltage, the above valve

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value will not exist any more. It begins at 0V to measure the voltage range.

DC and AC Current measurement

Refer to Automatic Selection.

When the current is above 5mA, the DMM enters current measure mode automatically. The LCD will indicate the

current with DC or AC and its shown with figures in the corresponding units A or mA

Warning

To avoid damage to the meter or injury if the fuse blows, never attempt an in-circuit current measurement where

the open-circuit potential to earth is greater than 250V. To avoid damage to the meter, check the meter’s fuses

before proceeding. Never place the probes in parallel with a circuit or component when the leads are plugged into

the current terminals.

2. Button Definition

Due to the fact this meter only contains 3 buttons, usually SELECT, MAX/MIN and HOLD are chosen to be set.. If

necessary, such keys as MAX/MIN can be shifted to others like Hz/DUTY.

①①①①. SELECT BUTTON

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