KAIWEETS True-RMS HT118A Digital Multimeter User Manual

Digital Multimeter
User Manual
True-RMS
HT118A

Safety Instructions

The instrument is designed according to the requirements of the international electrical safety standard IEC61010-1 for the safety requirements of the electronic testing instruments. The design and manufacture of instruments strictly comply with the requirements of IEC61010-1 CAT.III 1000V over-voltage safety standards and pollution level 2.

Warning

In order to avoid possible electric shock or personal injury and other safety accidents, please abide by the following specifications:

• Please read this manual carefully before using the instrument, and pay special attention to safety warning information.
• Before using the instrument, please check whether there is any crack or plastic damage in the instrument case. If you do, do not use it again.
• Before using the instrument, please check whether the probe is cracked or If so, please replace the same type and the same electrical specifications.
• Please comply with local and national safety code. Wear personal protection equipment (such as approved rubber gloves, masks, and flame retardant clothes, ) to prevent being damaged by electric shock and electric arc due to exposed hazardous live conductor

Safety Operating Procedures

• Before opening the outer cabinet or battery cover, please remove the probe on the instrument. Do not use the instrument in the circumstances that the instrument is taken apart or the battery cover is opened.
• When using the probe, please put your fingers behind the finger protector of the probe.
• When measuring, please connect the zero line or the ground line firstly, then connect the live wire; but when disconnecting, please disconnect the live wire firstly, then disconnect the zero line and ground line.
• When it shows low battery indicator, please replace the battery in time in case of any measurement error.
• It only meets the safety standards when the instrument is used together with the supplied probe. If the probe is damaged and needs to replace, the probe with same model number and same electrical specifications must be used for

Cautions

• Do not use the instrument around explosive gas, steam or In wet environment.
• The instrument shall be used in accordance with the specified measurement category, voltage or current rating.
• Please be careful if the measurement exceeds 30V AC true RMS, 42V AC peak or 60V DC. There may be danger of electric shock at this kind of voltage
• By measuring the known voltage to check whether the meter work is normal, if it is not normal or damaged, do not use it again.

Product Description

Symbol Meaning

	Dangerous voltage may be present		Warning; Important information
∼	AC (Alternating Current)		AC and DC
	DC (Direct current)
	Earth ground		Fuse
	Low Battery		Double insulated
	Complies with EU directives
	Do not dispose of this product as unsorted municipal waste.

Multimeter Features

1. NCV probe
2. Flashlight
3. Red / Green Light
4. LCD display (bicolored)
5. Function Key
6. Rotary Switch V-Terminal
7. COM Terminal
8. mA, uA Terminal
9. WA Terminal

FUNC. Key

	Press the FUNC button to select the appropriate measurement function.
	Press the ” HOLD”     key, hold the data for easier recording. Press the button again to remove the hold function.
	Press the MAX/MIN key to enter the MAX/MIN mode. In this mode, the multimeter will capture the highest/lowest reading it records. Press and hold this button again to exit the MaxlMin Modes.
	Backlight: Press once to turn on the display backlight. Press once more to turn off backlight
	Flashlight: Long-press more than 2 seconds, to turn on/off the flashlight.

Install or replace the battery

If the ” ” symbol appears on the display, the battery should be replaced immediately. Disconnect the test leads from the input terminals of the meter and turn off the meter. Remove the rubber sleeve and the screws on the back of the multimeter to replace the battery. After that, re-apply the compartment cover and reinstall the screw firmly.

Sleep Mode

• The Meter automatically enters sleep mode if there is no operation for 15 minutes to save battery energy. Pressing any button or turning the rotary switch awakes the Meter.
• If you press the “FUNC.” button and turn on the meter, the sleep mode will be deactivated. After turning off the meter, The Meter will restore Sleep Mode after power off.

Measurement Operation

DC/AC voltage measurement

Don’t use it to test DC1000V or AC750V, the instrument may be damaged. Always test known voltage with the meter before use to confirm the instrument function Is Intact.

1. Turn the rotary switch to”“and select DC/AC voltage function by “FUNC’ key **
2. Insert the red lead in “ ” terminal, insert the black lead in the “COM” terminal.
3. Connect the test leads to the source or load to be measured.
4. Read LCD display, when measuring AC voltage the frequency is displayed simultaneously.

DC/AC voltage mV measurement

Don’t use it to test DC 250V, the instrument may be damaged. Always test known voltage with the meter before use to confirm the instrument function is intact. Always test known voltage with the meter before use to confirm the instrument function is intact.

1. Turn the rotary switch to ” ” and select DC/ AC voltage function by “FUNC.” key 41-41.0.0
2. Insert the red lead in ” ” terminal insert the black lead in the “COM” terminal.
3. Connect the test leads to the source or load to be measured.
4. Read LCD display, when measuring AC voltage the frequency is displayed simultaneously.

Frequency/Duty measurement (Hz%)

The voltage above 10V can’t be measured, otherwise, the instrument may be damaged.

1. Turn the rotary switch to “Hz%”
2. Insert the red lead in ” ” terminal, insert the black lead in “COM”
3. Connect the test leads to the source or circuit in parallel to be measured, measure the frequency and duty.
4. Read the measurement result on the screen.

Resistance / Continuity / Diode measurement

When measuring the diode on the line, disconnect the power supply and discharge all the high-voltage capacitors. Otherwise, the instrument may be damaged

1. Turn the rotary switch to ”  ” and select the Resistance / Continuity / Diode measurement function by “FUNC.” 2
2. Insert the red lead in ” l, insert the black probe in “COM”.
3. Connect the test leads to the source or circuit in parallel or diode to be measured. Touch the diode anode with the red lead, the black lead contacts the diode cathode.
4. Read the measurement result on the screen.

NCV test

In order to avoid possible accidents such as electric shock or personal injury, please follow the safety regulations.
NCV

1. Turn the rotary switch to the ” uve ” and Switch to NCV test function by “FUNC.” key. Meter will display “NCV”.
2. Then NCV probe gradually approaches the detected point.
3. When the meter senses strong AC signals, the red indicator lights up and meter beeps lastly.

Capacitance measurement

When measuring Capacitance on the line, disconnect the power supply and discharge all the high-voltage capacitors. Otherwise, the instrument may be damaged and may be struck by electric shocks.

1. Turn the rotary switch to .
2. Insert the red lead in terminal, insert the black lead in “COM” terminal.
3. Contact the probe to the measured circuit or Capacitance, measure the resistance.
4. Read the measurement result on the screen.

Temperature Measurement

Don’t touch the charged object when measuring temperature.

• Turn the rotary switch to the ” C°/’F° “
• Insert the K-Type thermocouple into The thermocouple’s positive (red) is inserted into the input, and the negative end (black) is inserted into the “COM” input.
• Carefully touch the end of the thermocouple to the object being measured. Wait for the temperature reading to settle, then record the result from the LCD display.

DC/AC current measurement

To avoid damaging the instrument or equipment, check the fuse before measuring and ensure that the measured current does not exceed the rated maximum current; use the correct input.

1. Tum the rotary switch to “” or “” or “” and select AC or DC current function by “FUNC.” key
2. Insert the red lead in “10A” terminal or “10K terminal, insert the black lead in “COM” terminal.
3. Disconnect the power of the tested circuit; connect the meter to the circuit under test, then turn on the circuit power supply.
4. Read the measurement result on the screen. When measuring AC current, the frequency is displayed on LCD simultaneously.

	Red Lead	Black Lead
	mA	COM
	mA	COM
	10A	COM

NCV test

In order to avoid possible accidents such as electric shock or personal injury, please follow the safety regulations.

1. Turn the rotary switch to the ” ” and Switch to the NCV test function by the “FUNC.” key. Meter will display “NCV”.
2. Then NCV probe gradually approaches the detected point.
3. When the meter senses weak AC signals, the green indicator lights up, and the meter beeps slowly.
4. When the meter senses strong AC signals, the red indicator lights up, and the meter beeps lastly.

Live test

In order to avoid possible accidents such as electric shock or personal injury, please follow the safety regulations.

1. Turn the rotary switch to the ” “, and Switch to the live test function by the “FUNC.” key. Meter will display “LIVE”.
2. Insert the red lead in ” ” terminal, Then the probe contact to the test point
3. When the meter senses weak AC signals, the green indicator lights up, and the meter beeps slowly.
4. When the meter senses strong AC signals, the red indicator lights up and the meter beeps fastly.

General Specifications

Accuracy Specifications

The accuracy applies within one year after the calibration. Reference condition: the environment temperature 18°C to 28°C, the relative humidity is no more than 80%.
Accuracy: ± (% reading + word).
DC/AC Voltage

DC/AC Current

Note: When measuring large current, continuous measurement don’ than 15 seconds.
Resistance/Capacitance

Frequency/Duty

Maintenance

Clean
If there’s dust on the terminal or the terminal is wet, it may cause measurement errors. Please clean the instrument according to the steps below:

1. Switch off the power supply of the instrument and remove the test probe.
2. Turn over the instrument and shake out the dust accumulated in the input terminal. Wipe the outer cabinet with a damp cloth and mild detergent, do not use abrasive or solvent. Wipe contacts in each input terminal with a clean cotton swab soaked in alcohol.

WARNING
Please always keep the inside of the instrument clean and dry to avoid electric shock or instrument damage.
Replace the Fuse

1. Turn off the power supply of the instrument, and remove the probe on the instrument.
2. Use a screwdriver to unscrew screws fixing the back cover, and remove the back cover.
3. Remove the burnt fuse, replace it with a new fuse of the same specifications, and ensure that the fuse is clamped in the safety clip.
4. Install the back cover, fix and lock it with screws.

Three Year Warranty

KAIWEETS will repair, without charge, any defects due to faulty materials or workmanship for three years from the date of purchase provided that:

• Proof of purchase is produced.
• Service/repairs have not been attempted by unauthorized persons;
• The product has been subject to fair wear and tear;
• The product has not been misused; Defective products will be repaired or replaced, free of charge or at our discretion if sent together with proof of purchase to our authorized distributor(s). For further detail of warranty coverage and warranty repair information, send an email to [email protected].

Documents / Resources

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