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True-RMS Multimeter

Model: HT118A

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Summary of Contents for HT118A

Page 1: ...True RMS Multimeter Model HT118A ...

Page 2: ...shlight 7 Sleep Mode 8 LED Terminal Indication 8 High voltage prompt function 8 Measurement Operation 9 DC AC voltage measurement 9 DC AC voltage mV measurement 10 Frequency Duty measurement 11 DC AC current measurement 12 Resistance measurement 13 Continuity measurement 14 Diode measurement 15 Capacitance measurement 16 NCV test 17 Live test 18 ...

Page 3: ...fications 20 Accuracy Specifications 21 DC voltage 21 AC voltage 22 DC current 22 AC current 23 Resistance 23 Capacitance 24 Frequency Duty 24 Diode test 26 Continuity test 26 Temperature 26 Maintenance 27 Clean 27 Replace Battery and Fuse 27 ...

Page 4: ...on If incorrectly perform the operation or do not follow the procedure it may damage the instrument or equipment In the circumstances that such conditions are not met or not fully understood please do not continue to perform any operation indicated by the caution mark Warning mark indicates the condition and operation which may cause danger to users It requires that you pay attention during the ex...

Page 5: ...rsonal 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 Strictly observe the operation of this manual and use this instrument Otherwise the protection function of the instrument may be damaged or weakened Please be careful if the measurement exceeds 30...

Page 6: ...h as approved rubber gloves masks and flame retardant clothes etc to prevent being damaged by electric shock and electric arc due to exposed hazardous live conductor When it shows low battery indicator please replace the battery in time in case of any measurement error Do not use the instrument around explosive gas steam or in wet environment When using the probe please put your fingers behind the...

Page 7: ...e instrument is taken apart or battery cover is opened 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 replacement ...

Page 8: ...icipal waste CAT II Product is suitable for testing and measuring circuits directly connected to power points sockets and similarities of low voltage power installations CAT III Product is suitable for testing and measuring circuits connected to the distribution part of low voltage power supply devices in buildings CAT IV Product is suitable for testing and measuring circuits connected to the powe...

Page 9: ...clearer and better user experience It is the best choice for professional electricians enthusiasts or families 1 NCV probe 2 Flashlight 3 Red green light 4 LCD display Dual color backlight 5 Function keys 6 Rotary Switch 7 Other measurement input terminal 8 COM Input terminal 9 mA uA Input terminal 10 10A Input terminal ...

Page 10: ...ent Press the MAX MIN key to enter the MIN MAX mode and then press the loop to display the maximum and minimum values Press and hold for more than 2 seconds to exit the MIN MAX mode Backlight Press key turn on off the backlight After about 10 seconds of inactivity it will automatically shut down Flashlight Press key and keep more than 2 seconds to turn on off the flashlight ...

Page 11: ...sleep mode will be deactivated After turning off the meter The Meter will restore Sleep Mode after power off LED Terminal Indication Turn on the Meter and switch the gear the corresponding light on the terminal flashes to imply the correct input terminal High voltage prompt function When the measuring voltage is greater than 80V or the measuring current greater than 1A the orange backlight will li...

Page 12: ...the voltage 4 Read the measurement result on the screen when measuring AC voltage the frequency is displayed simultaneously WARNING The voltage above DC1000V or AC750V can t be measured otherwise the instrument may be damaged Pay special attention to safety when measuring high voltage to avoid electric shock or personal injury Always test known voltage with the meter before use to confirm the inst...

Page 13: ...ply or circuit in parallel measure the voltage 4 Read the measurement result on the screen when measuring AC voltage the frequency is displayed on LCD simultaneously WARNING The voltage above DC250V can t be measured otherwise the instrument may be damaged Pay special attention to safety when measuring high voltage to avoid electric shock or personal injury Test the known voltage with the meter be...

Page 14: ... measure the frequency and duty 4 Read the measurement result on the screen WARNING The voltage above 10V can t be measured otherwise the instrument may be damaged Pay special attention to safety when measuring high voltage to avoid electric shock or personal injury Test the known voltage with the meter before use confirm the instrument function is intact Caution To avoid damaging instruments or e...

Page 15: ...equency is displayed on LCD simultaneously WARNING The voltage above 250V can t be measured otherwise the instrument may be damaged Pay special attention to safety when measuring high voltage to avoid electric shock or personal injury Test the known current with the meter before use confirm the instrument function is intact When measuring large current continuous measurement should be no longer th...

Page 16: ...lack probe in COM terminal 3 Contact the probe to the measured circuit or resistance measure the resistance 4 Read the measurement result 1 WARNING When measuring resistance 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 ...

Page 17: ...sistance or circuit of the measured resistance is less than 30Ω the buzzer will on and the green indicator lights up at the same time when the resistance is about between 30Ω to 60Ω the red indicator lights up LCD displays the resistance 1 WARNING When measuring Continuity on the line disconnect the power supply and discharge all the high voltage capacitors Otherwise the instrument may be damaged ...

Page 18: ...l insert the black probe in COM terminal 3 Touch the diode anode with the red probe the black probe contacts the diode cathode 4 Read the measurement result on the screen 2 WARNING When measuring diode on the line disconnect the power supply and discharge all the high voltage capacitors Otherwise the instrument may be damaged ...

Page 19: ...Contact the probe to the measured circuit or Capacitance measure the resistance 4 Read the measurement result on the screen 5 WARNING 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 ...

Page 20: ...int 3 When the meter senses weak AC signals the green indicator lights up at the same time the beeps send out slow dips 4 When the meter senses strong AC signals the red indicator lights up at same time the beeps send out fast dips 3 WARNING In order to avoid possible accidents such as electric shock or personal injury please follow the safety regulations ...

Page 21: ...o the test point 3 When the meter senses weak AC signals the green indicator lights up at same time the beeps send out slow dips 4 When the meter senses strong AC signals the red indicator lights up at same time the beeps send out fast dips 4 WARNING In order to avoid possible accidents such as electric shock or personal injury please follow the safety regulations ...

Page 22: ...ect the measured object with the thermocouple probe and read the result from the display Note The cold junction of thermocouple is placed inside the instrument and it needs longer heat balance with the measuring environment 5 WARNING When measuring temperature with thermocouple the probe of thermocouple can t touch the charged object otherwise it may damage the instrument and may suffer electric s...

Page 23: ... mA F600mA 250V fuse 10A F10A 250V fuse Sampling rate 3 times second Terminal indication Auto Battery 2 x 1 5V AAA batteries Operation Conditions Operating temperature and humidity 0 40 C 80 RH 10 C non condensing Storage temperature and humidity 10 60 C 70 RH remove the battery Operating altitude 0 6500 ft 0 2000 m Pollution level 2 Temperature coefficient 0 1 accuracy C 18 C or 28 C ...

Page 24: ...tion the environment temperature 18 C to 28 C the relative humidity is no more than 80 Accuracy reading word DC voltage Input impedance 10MΩ Maximum input voltage 1000V DC Overload protection 1000V DC or 750V AC Range Resolution Accuracy 600mV 0 1mV 0 5 reading 3 6V 0 001V 60V 0 01V 600V 0 1V 1000V 1V ...

Page 25: ...solution Accuracy 600 A 0 1 A 1 2 reading 3 6000 A 1 A 60mA 0 01mA 600mA 0 1mA 10A 0 01A Overload protection A mA F600mA 250V fuse 10A F10A 250V fuse Maximum input current mA 600mA A 10A When measuring large current continuous measurement should be no longer than 15 seconds Range Resolution Accuracy 600mV 0 1mV 0 8 reading 5 6V 0 001V 60V 0 01V 600V 0 1V 750V 1V ...

Page 26: ...V fuse 10A F10A 250V fuse Maximum input current mA 600mA A 10A Frequency Response 10Hz 1kHz True RMS When measuring large current continuous measurement should be no longer than 15 seconds Resistance Range Resolution Accuracy 600Ω 0 1Ω 1 0 reading 3 6kΩ 0 001kΩ 60kΩ 0 01kΩ 600kΩ 0 1kΩ 6MΩ 0 001MΩ 1 5 reading 3 60MΩ 0 01MΩ Overload protection 250V ...

Page 27: ...001mF 5 0 reading 5 100mF 0 01mF Overload protection 250V Note the parameters do not include errors caused by the capacitance of the pen capacitor and the substrate Frequency Duty Range Resolution Accuracy 10Hz 0 001Hz 1 0 reading 3 100Hz 0 01Hz 1000Hz 0 1Hz 10kHz 0 001kHz 100kHz 0 01kHz 1000kHz 0 1kHz 10MHz 0 001MHz 3 0 reading 3 1 99 0 1 ...

Page 28: ...ltage sensitivity 0 2 10V AC 3 Overload protection 250V V 1 Range 0 100 kHz 2 Voltage sensitivity 0 5 600V AC3 A mA A 1 Range 0 100 kHz 2 Voltage sensitivity 1 4 Full range 3 Overload protection A mA F600mA 250V fuse A F10A 250V fuse ...

Page 29: ...ut 3V Overload protection 250V The resistance is 30 the buzzer will sound and the indicator light is green When the resistance 30 and 60 the buzz does not ring the indicator light is red Temperature Range Resolution Accuracy 1 20 0 5 0 reading or 3 0 400 1 0 reading or 2 400 1000 2 0 reading 1 4 32 5 0 reading or 6 32 752 1 0 reading or 4 752 1832 2 0 reading The accuracy does not include the erro...

Page 30: ...erminal with a clean cotton swab soaked in alcohol 3 WARNING Please always keep the inside of the instrument clean and dry to avoid electric shock or instrument damage Replace Battery and Fuse Replace Battery 1 Turn off the power supply of the instrument and remove the probe on the instrument 2 Use screwdriver to unscrew screws fixing the battery cover remove the battery cover 3 Remove old batteri...

Page 31: ...nance when the instrument will not be used for an extended period of time please remove the batteries to avoid any product damage caused by battery leakage Replace Fuse 1 Turn off the power supply of the instrument and remove the probe on the instrument 2 Use screwdriver to unscrew screws fixing the back cover and remove the back cover 3 Remove the burnt fuse replace with new fuse of the same spec...

Page 32: ...29 5 WARNING To avoid possible electric shock personal injury or instrument damage please use the fuse with same specifications or specified specifications EN18118AV10 ...

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