Read the user manual carefully before using the meter and operate it only after fully understanding the content. Incorrect use may cause personal injury and damage to the instrument.

I. Overview

This is a digital megohmmeter& digital multimeter. It is fully functional, highly accurate, reliable in operation, and easy to use. The insulation resistance test voltage can be selected from 100V/250V/500V/1000V/2500V. It can monitor the insulation resistance test voltage in real time, effectively avoiding misjudgment caused by the output voltage not meeting the rated requirements.The meter's insulation resistance measurement can reach up to 50GΩ, and the measurement time can be set as needed. The measurement result is automatically held after completion.The digital multimeter functions include NCV, AC/DC voltage, True RMS, resistance, capacitance, frequency, diode, and continuity tests.This product is suitable for measuring the insulation resistance of various electrical equipments and insulating materials such as transformers, motors, cables, switches, and electrical appliances, and for maintenance, testing, and calibration of various electrical equipments. It is compactly structured and portable, making it an ideal electrical and electronic testing instrument for you.

II. Safety Information

1. This product complies with IEC61010 CAT III 600V safety standards. Read this instruction manual carefully before use.
2. Safety Symbol Explanation: Warning prompt, the user must pay attention and read carefully! Risk of high voltage electric shock!
3. Do not use the meter before the rear cover is properly closed, otherwise there is a risk of electric shock.
4. Before use, check that the test lead insulation is intact and undamaged.
5. To avoid electric shock, do not touch the test lead tips or the circuit under test during testing.
6. Ensure the wire connection plugs are firmly inserted into the terminals.
7. Do not exceed the specified maximum input value for any range during measurement.
8. Do not rotate the range switch to change ranges during measurement to prevent damage to the meter.
9. Voltages above 30V may pose an electric shock hazard; operate with caution during measurement.
10. Before connecting for insulation testing, confirm that the object under test is powered off.
11. Do not test insulation resistance in flammable atmospheres, as sparks may cause an explosion.
12. If the meter case or test leads crack during use, exposing metal parts, stop using the meter immediately.
13. When opening the rear cover to replace the battery, be sure to confirm that the test leads have been removed from the test terminals and the range switch is set to the OFF position.

III. Parts Names and Functions

1. LCD Display.
2. Function keys:

1. SELECT key: used to switch between functions within the same multimeter range.
2. HOLD/ key: shortly press to lock the display the test result, then shortly press again to return to normal measurement; press and hold for more than 2 seconds to turn the backlight on or off.
3. RANGE key: use to select the automatic range or manual range operating mode. The instrument starts in automatic range mode, displaying the “AUTO” symbol. Pressing this function switches to manual range, with each press increasing the range by one step, cycling from low to high sequentially. Press and hold this key for more than 2 seconds to return to automatic range mode.
4. △REL key: Relative value measurement or Clear to zero key.a) Voltage, current, and resistance can be measured as relative values. After pressing this key, the display shows a "△" symbol, enters manual range mode, takes the currently displayed value as the reference value, and then displays the difference between the measured value and the reference value. Pressing this key again exits the relative value measurement mode;b) Clear function for residual digits in the capacitance range. When pressed, the display shows zero.5). TIME key: used to set the measurement time for insulation resistance.6). PI/DAR key: Polarization Index / Dielectric Absorption Ratio button. Shortly press 1st time, the screen displays DAR (Absorption Ratio) and time ratio (Time2:Time1): default ratio is 1MIN:15S; shortly press a 2nd time to set the dielectric absorption ratio to 1MIN:30S; shortly press a 3rd time, the screen displays PI (Polarization Index) and time ratio 10MIN:60S; shortly press a 4th time to cancel the PI/DAR test function. After selecting a time ratio, press the TEST button to start measurement.7). TEST key / Indicator light:a) Insulation resistance test key, press and hold this key to start the measurement, the screen displays TEST and symbol, after the reading stabilizes, release this key to complete the test, the test data and the " " symbol will be automatically displayed on the screen.b) High-voltage test warning light / NCV induction light / button and audio-visual alarm indicator light.

1. Functions switch knob: power turn/off, measurement voltage of insulation resistance, various functions of the multimeter.
2. Insulation resistance test input terminals: “INSULATION ”is connected to the line terminal of the object to be measured for insulation resistance, and“INSULATION ” is connected to the ground terminal of the object to be measured for insulation resistance.
3. VΩ and COM input terminals: voltage, resistance, capacitance, frequency, diode, and continuity tests. The COM input terminal serves as the common ground/insulation resistance shield terminal.
4. Shockproof sleeve, battery door.
5. NCV (non-contact voltage) induction detection area.

IV. General Specifications

1. Auto-ranging, Overload display "OL".
2. Sampling Rate: 2 times per second.
3. Operating Environment: 0°C - 40°C, less than 75% RH.
4. Storage Environment: -10°C - 50°C, less than 80% RH.
5. Maximum Power Consumption: 5W, Sleep mode power consumption less than 100uW.
6. Low Battery Indicator: displays
7. Power Supply: 6*1.5V AA battery.
8. Auto Power Off: the meter automatically turns off about 15 minutes after power-on if no button is pressed or knob is turned.
9. Dimensions: 200mm x 90mm x 50mm.
10. Weight: Approx. 480g (including batteries).
11. Accessory: 1pc operation manual, 1pc protect holster, 1pair test leads, 1pair alligator clip test leads, 6pcs 1.5V AA battery.

V. Insulation Tester Technical Specifications and Instructions

Accuracy: ±(% reading + digits)Guarantee period: one year since the date from factory.Accuracy guaranteed environment: 23°C ±5°C, less than 70% RH.

Rated Test Voltage, Effective Measurement Range, and Accuracy

Display Range

MeasurementTerminalCharacteristicsRated Allowable Range Drop-offResistorDrop-oflShort- Circuit Remarksof Open CircuitVoltageVoltage100VBuzzer alarm when<0.2MΩ500V 250V 0.5MΩ 1MΩ Buzzer alarm when <0.5MΩ Buzzer alarm when <1MΩ1000V 2MΩ Buzzer alarm when <2MΩ0.2MΩRatedVoltage90%~110%≥1mA2500V 5MΩ Buzzer alarm when <5MΩ

VI. Insulation Resistance Operating Instructions

Safety Precautions:

1. Beware of high voltage electric shock. After the insulation resistance test is completed, confirm that the voltage on the object under test is less than 30V before starting to remove the test leads.
2. During measurement, do not touch the object under test; Beware of high voltage electric shock.
3. When measuring insulation resistance, the object under test must not be live, and it must be confirmed that the object under test is safely grounded. Short-circuit and discharge the two test terminals of the test object before testing.
4. When measuring insulation resistance, do not allow external voltage to enter the test circuit.
5. Before starting the test, confirm the position of the range switch and whether the test lead connections are tight.
6. After pressing the insulation resistance test button, never touch the exposed parts of the meter or the object under test, otherwise there is a risk of electric shock.

Insulation Resistance Measurement

1. Test Lead ConnectionInsert the black test lead into the INSULATION jack and the red test lead (or the test lead with a remote control button) into the other INSULATION jack. Connect the alligator clips to the test leads and attach them to the object under test respectively. When testing equipment with surface leakage, insert the plug of the test lead with the black test lead into the COM terminal of the meter (the COM terminal is not used if there is no leakage source).
2. Test Wires ConnectionThe connection from the INSULATION terminal socket is the ground wire; The connection from the INSULATION terminal socket is the line wire; The connection from the COM terminal socket is the guard wire; connect it to the surface of the object under test to prevent surface leakage from affecting the test impedance.The screen displays the test voltage and “ ” when no test is in progress.
3. Rated Voltage SelectionSelect the rated voltage required for your insulation resistance test by turning the range switch knob to the corresponding voltage range. According to the test time requirement, press the "TIME" key to select 15S/30S/1MIN/10MIN (S is seconds, MIN is minutes).
4. Press the TEST buttonor the remote control button on the test lead, the red indicator light turns on, the main display area shows the current insulation resistance value, the secondary display area shows the actual measurement voltage, and the TEST and symbol displayed. When the insulation resistance exceeds the maximum measurement value, the instrument displays the 'OL' symbol or '>' symbol along with the maximum value of the current range.

Notes:

*Beforetesting,ensurethecircuitundertestisde-energized. Do notmeasuretheinsulation ofliveequipmentorlivecircuits.Duringtesting,thisinstrumentoutputs hazardousvoltage. Operatewithextremecaution.Ensurethetestobjectissecurelyclampedandyourhands haveleftthetestclipsbeforepressingtheTESTbuttonto outputhighvoltage.*Do notshort-circuitthetwotestprobesduringhighvoltageoutputormeasureinsulation resistanceimmediatelyafterhighvoltageoutput.Suchimproperoperationcan easily generatesparkscausingfire,andmay damagetheinstrumentitself.*Whenthemeasuredresistanceislowerthanthepresetalarmvalue, thebuzzersounds.

AbsorptionRatio(DAR)andPolarization Index(PI)Measurement:

Thewiringmethodis thesameas formeasuringinsulationresistance,justset to DARorPI mode.Shortlypress PI/DARonce,thescreendisplaysDAR(AbsorptionRatio)andtimeratio(Time2:Time1): defaultratiois1MIN:15S;Shortlypress2ndtimeto setthedielectricabsorptionratioto 1MIN:30S;Shortlypressa 3rd time,thescreendisplaysPI(PolarizationIndex)andtimeratio 10MIN:60S.Shortlypressa 4th timeto cancelthePI/DARtestfunction.Afterselectinga time ratio,presstheTESTbuttontostartmeasurement.(Themaindisplaybecomesa timer. WhenTime1isreached,thebuzzersoundsandthemeterrecordsthevalueat thattime. WhenTime2isreached,thebuzzersounds,recordsthevalueat thattime,andcalculatesthe ratiooftheinsulationresistancesat thetwotimes).

VII. Multimeter Technical Specifications and Instructions

Accuracy: ±(% reading + digits)Guarantee period: 1 year since the date from factory.Accuracy guaranteed environment: 23°C ±5°C, less than 70% RH.

DirectCurrentVoltage(DCV)

Input impedance: approx. 10M Ω10MΩ. Max input voltage: 1000V.

AlternatingCurrentVoltage(ACV)

Frequency range: 40Hz~1kHz. Input impedance: approx. 10MΩ. Max input voltage: 750V. Display: True RMS (Sine Wave RMS Calibration).

Resistance

Overload protection: 250VRMS

Capacitance

Overload protection: 250VRMS

Diodeand Continuity

WARNING: For safety, voltage input is prohibited on this range!

VIII.Multimeter OperationIntroduction

AC/DC Voltage Measurement

1. Switch the knob to the V Hz range;
2. Insert the red test lead into “VΩ ”terminal, the black test into the “COM” terminal;
3. Shortly press the “SELECT” key to switch to switch to the DCV or ACV function,Connect the leads in parallel to both ends of the voltage to be measured for measurement.LCD displays the test result value.
4. Shortly press the “SELECT” key to switch to switch to the Frequency function,which can measure frequency from 10Hz to 20kHz with a voltage greater than 2V.

NOTE:

183. The ACV/DCV measurement should not exceed 600Vrms. Although it is possible to measure higher voltages, it may damage the instrument and harm the user! The input impedance is all 10MΩ. This load effect will cause measurement errors when measuring high-resistance circuits. If the impedance of the measured voltage is ≤10kΩ, the error can be ignored (0.1% or lower).
183. When measuring high voltage, pay high attention to safety to avoid electric shock!
183. Before use, you can test the known voltage to confirm whether the product function is intact! When the voltage exceeds 30V, a symbol “ ” will be displayed to prompt careful operation.

Resistance, Diode and Continuity Measurement

1. Switch the knob to “Ω ”range; the default is resistance function, press the “SELECT” key to choose the resistance/diode/continuity test;2). Insert the black test lead into “COM” terminal, and the red test lead into the “VΩ ”terminal;3). Connect the test leads in parallel to both ends of the test circuit or component, the test resistance value displays on LCD. When the test leads are open-circuited or the input is overloaded, the display will show "OL". When the short-circuit resistance of the test leads is greater than 0.6Ω, please check whether the test leads are loose or for other reasons.4). Press the "SELECT" key to switch to the continuity range, when the resistance value of the circuit under test is less than approximately 50Ω, it will automatically switch to the buzzer function, and the buzzer will sound;Note: The circuit under test must be checked for continuity with the power supply disconnected, because any load signal will cause the buzzer to sound, leading to incorrect judgments.5). Press the “SELECT” key to switch to the diode range, connect the test leads in parallel across the terminals of the diode under test (connect the red lead to the positive terminal), and read the forward voltage drop value. It can display the working voltage of LED below 3V. When the diode is connected in reverse or the input terminal is open, the display screen will show "OL".

Capacitance Measurement

1). Switch the knob to the capacitance range;2). Insert the black test lead into “COM” terminal, and the red test lead into the “VΩ ”terminal;3). Connect the test leads in parallel to both ends of the capacitor under test and read the capacitance value.

NOTE:

183. When measuring, it is essential to ensure that there is no voltage on the circuit or component being measured. When the capacitance value is large, the measurement may take several seconds.
183. Before measurement, please completely discharge the residual charge of the capacitor. This is especially important for capacitors with high voltage to avoid damaging the instrument and endangering personal safety.

Non ContactVoltage(NCV) Measurement

Warning:This functionmay cause false alarmsdueto differentexternal interference sources.Use the measurementresultsfor reference only.Set thefunctionswitchto the “NCV” position.Whenthe line to be tested is near the topof themeter, the meter displays signalstrength,and the buzzeremits a beepingalarm.

Note:

1.Voltagemay still be present even ifthere is no indication.Do not rely solelyon the non- contactvoltage detectorto determineif there isvoltage in a conductor.2.Detectionmay be affected by socket design,insulationthickness,and type.3.External interference sources (suchas flashlights,motors, etc.) may cause misjudgments.

IX. Auto PowerOff

The meter automatically turns off about 15 minutes after power-on if no button is pressed or knob is turned.Press and hold the HOLD button to wake it from sleep mode.

X. Battery Replacement

Do not replace the battery during the testing process. Additionally, to avoid electric shock accidents, before replacing the battery, please first turn the range switch to OFF and remove the test leads, etc.Loosen the screws on the battery cover of the device and open the battery cover. Replace with new batteries of the same specification, close the battery cover and tighten the screws.Note: The battery must not be installed with reversed polarity.

XI. Instrument maintenance

1. Keep the instrument and test leads clean, dry and undamaged. You can clean the case with a clean cloth or detergent. Do not use abrasives or organic solvents.
2. Avoid mechanical damage, vibration, shock, corrosion, and keep away from high- temperature positions and strong magnetic fields.

XII.Troubleshooting

Changes to this manual will be made without prior notice.