NAVAC NMC1 Digital Electrical Clamp Meter User Manual

: June 6, 2024
: NAVAC

NAVAC NMC1 Digital Electrical Clamp Meter FIG 7

NAVAC NMC1 Digital Electrical Clamp Meter

Introduction

NMC1 series are 4000-council hand-held clamp meters with auto range. The meter Is designed with ergonomic structure and overload protection for all ranges, which make It a superior tool for electricians. NMC1 area can
measure AC/DC voltage, AC current, resistance, diode, continuity, capacitance, temperature and perform data hold, max/min measurement, relative value measurement, NCV, low battery indication, audio/visual
alarm, and auto power-off functions.
please- read the “safety guidelines· and “warnings• In this manual carefully before use and strictly obsenle the precautions.
Warning:
Plaue 11111d the Msafaty guldallna” c.anm.illy bafonl using the meter.

Open Box inspection

Open the package box and take out the devtce. Please check whether the following itarns ere deficient or damaged, and contact your supplier immedietaly if they are.

User manual 1pc
Test leeds 1 pair
Type K temperature probe 1pc
Cloth beg 1 pc
Certficate of approval 1 pc

Safety Guidelines

Please pay attention to • & •. A warning indicates conditions or actions 1hat may pose hazards to the user, or cause damage to the meter or equipment under test.
This meter complies with IECIEN61010-1, 61010-2–032, EN61326-1, double insulation, CAT II 800V, CAT Ill 300V end pollution grade II Safety standards.
Please use the meter only as specified in this manual, otherwise, the protection provided by the meter may be Impaired.

Check the clamp meter and the least leads before Una. Do not use the meter if the test leads, the insulation layer of the case appears damaged, er if there is nc display on the screen, er if you suspect that the meter is not operating properly.
Do not use the meter If the rear cover or the battery cover are not covered up er It will pose a shock hazard.
Keep the finger behind the finger gulll’d during operation. Do not touch the bare wires, connection, unused input terminals or Iha circuits being measured to prevent electric shock.X
Switch the functional dial to the correct position before measuring. It Is str1ctly forbidden to switch the dial when measuring to avoid damage to the meter.
Do not input >600V AC/DC voltage between meter terminal and ground ID avoid electric shock and damage ID Iha meter.
When measuring AC/DC voltage>30V, please operate carefully according to 1o this user manual or it may pose a shock hazard.
Do not measure voltage or current which Is higher then the rated value. If the measuring range is unknown, please switch the functional dial to the maximum range. Before measuring the resistance, diode or continuity en line, switch off the power supply of the circuit and fully discharge all capacitors, otherwise, the measurement result might be incorrect:t.
To ensure accuracy, replace the battery In Ume when • IC! • appears on the screen. Take out the batteries If the meter is not used for II long times.
Do not change the internal wiring of the meter ID to avoid damage to the meter and personal injury.
Do not use or store the meter in high temperature, high humidity, flammable, explosive and strong electromagnetic environments. Clean the case with II soft cloth end mild detergent
Do not use abrasives er solvents to prevent corrosion and to avoid damage to the meter and personal injury.

Electrical Symbols

Eleirtrlcal Symbols

General SpaclflcaUons

LCD display: 4099 max
Policy display: auto POSITIVE and NEGETIVE polarity display
Overload display: “OL” er” -OL”
Low battery indication: ·a• symbol appears, please replace with n-batteries.
Measurement deviation: If the conductor being measured is not pieced in the center of the jaw during current measurement, it will cause extra :t1 .0% reeding error.
Drop last: 1 m drop lest pessad
Max jaw opening: 28 mm diameter
Max current conductor size: 28mm diameter
Power supply: AAA 1.5V battery X2
Auto power off: The meter will automatically shut down If the dial Is not switched er the buttons are not pressed In about 15 minutes. This function can be turned off as required.
Dimension: 220mm><77mm><29.5mm
Weight about 272g (including batteries)
Altitude: 2000m
Operating temperature and humidity: 0’t-30″C (:S:80%RH), 30″C-40″C (:S:75%RH), 40’t-50″C (:s45%RH)
Storage temperature and humidity: -20″C-+80″C (:S:80%RH)
EMC: RF field (1V/m): overall accuracy = specified eccuracy + 5%of range RF field (>1 Vim): no specified calculation

External Structure

NCV sensing part
Jaws: AC current sensor
Handguards: protect the user’s hand from touching the dangerous free.
Trigger: Press the trigger to open the jaw; release the! rigger and the jaws will close eulDmaticelly.
Functional dial: select functions
Functional buttons: select/switch functions or modes
LCD display: displays measured data and symbols.
Common Input terminal (COM): connects the black test lead or the negative end of the temperature probe.
Signe! input terminal: connects the red test lead or the positive end of the Iha temperature probe.

LCD Dlsplay

NAVAC NMC1 Digital Electrical Clamp Meter FIG 2

Button Function

SELECT/REL:
a) In a position with multiple functions, press SELECT/REL to switch between different functions.
b) In Quebec: instance position, press SELECT/REL to enter Iha relative value measurement mode.
HOLDIBACKLIGHT:
a] Short press to enter/exit the data hold mode.
b) Long press ID tum on/off the backlight (within 158). The blacklight will be off 11u1Dmatically after 15 seconds while It Is enabled.
MAXIMIN:
Press once to enter the MAX measurement mode, LCD will display the “MAX” symbol. Press the button again to enter 1he MIN measurement mode, LCD will display “MIN” symbol, and so on.
Long press this button to exit MAX/MIN measurement. This function is valid only in AC/DC voltage, AC current, .-Asistencia and temperature measurement

Technical index

Accuracy:t(% of reading + digits), please perform calibration once a year. Ambient tamparatura and humidity: 23’C:l:5″C; :SSO%RH.
To ensure accuracy, the operator!ng temperature should be within 18″C-28″C end the fluduetlon range should be within :t1 “C.
Tampereture <18″C or >28’C: edd temperature coefficient error 0.1 x (specified accuracy) re.

AC Current

ac crrueny

Frequency response: 50Hz-60Hz
4A range: open circuit ellows least significant digit <5.
Accuracy guarantee range: 5-100% of range

AC Voltage

ac volteg

Input Impedance:.10MO
Frequency response: 40-400Hz
Accuracy guarantee range: 5-100% of range

DC Voltage

dc volteg

Input impedance:t10MO
mV range: short circuit allows~ digits. Other ranges: return ID zero when short-circuited.
Accuracy guarantee range: 1-100% of range

RESISTANCE

Continuity

capacitance

Measurement result = reading of capacitance – reading of open test Leeds (Measured Capac:instance :S100nF: REL mode is C0mmended)
There Is a residual reading 0ntrtnslc capacitance) In open circuit.

Temperature

Temperatura

NCV

Operation Instructions

AC Currant Masuremant

Select AC current range (4A-, 40A-/400A-)
Open the jaws and place the wire in the canter (single wire), make sure the Jaws are completely closed and there Is no gab between them.
The meter can only measure one current conductor 11I a time. If two or more current conductors ere measured at the same time, the readings are wrong.

Notes:
• The current measurement must be operated between O” C-40’C. Hold the trigger and do not release it suddenly. The meter Is very sensitive to mechanical stress. Any impact will cause change to the reading in a short time.
• To ensure ac: curate measurement result, place the conductor being measured in the center of the jaw, otherwise it will cause extra:t1.0% reading error.
• Measured current ~ AC 400A: The meter will alarm automatically and the high voltage warning symbol ~• will flash automatically.
• Measured current> 420A(max): If “OL” appears, stop testing end-use e mater with larger range to measure, er ii may cause damage to the meter.

ACJDC Voltqa MHSuramant

Insert the red test lead to the “signal input” terminal, black to “COM’ terminal.
switch the dial to AC voltage poslHon, and conned the test probes with the 80urc:e or the load in parallel.

Notes:

Do not Input voltage higher than AC 600V. ft Is possible to measure higher voltage. However, it may cause damage to ths meter.
Be cautious to avoid electric shock:k when measuring high voltage.
Measured voltage :. 30V/AC (safe voltage): The high voltage welding symbol •~ • will appear on the LCD.
Measured voltage :t 600V/ AC: The meter will alarm automatically and the high voltage warning symbol • F • will flash automatically.

Raalatance Meuurwnant

,-t the red test lead ID the “signal input” terminal, black ID “COM” terminal.
Switch the dial ID “Ct position and press SELECT to select re&islance measurement. then connect:t the last probes with the resis1Dr in parallel

Notes:

If the measured reseller Is open or the resistance etc: needs the maximum range, the “OL” symbol will appear on the screen.
Before measuring the resistance on the line, switch off the power supply of the circuit, end fully discharge all capacitors.
If the resistance. is greater than 0.50 when the test leads are ahorted, please check if the teat leads are loose or damaged.
Do not input voltage higher 1han DC/AC 30V 1D avoid personal lnJuiy.

Continuity Mauur11msnt

Insert the red test lead to the “signal inpur terminal, black to -COM” terminal.
Switch 1he dial ID ” ,1J)” position and preas SELECT to seled continuity measurement• •Ill•, 1han oonnect the teat probes with the loads in parallel. Measured resistance <100: good conduction circuit,
buzzer on (beeps conHnuously) Measured resistance i!e10O and :5500: buzzer on er off Measured resistance >500: buzzer off

Notes:

Before checking the oontinuity on line, switch off the power supply of the circuit, and fully discharge all cepecltora.
Continuity measurement: The open circuit voltage is about 2.0V and the range should be 4000.
Do not Input voltage higher 1han DC/AC 30V to avoid personal inJuiy.

Diode Meauniment

Insert the red test lead ID tho “signal input” lllrmnal, black 1D ‘COM” tarminal. The polarity d the rad last lead should be •+• and the polarity of the black test lead should be•.•.
Switch the dial 1D ” .. ” position and press SELECT ID salec:t diode measurement • • ·, than read Iha forward PN pldlDn \l0ltage of the measured diode on the LCD. Sllcmi PN Junction: about 500-l!OOmV (normal value).

Notes :

If the diode Is open or 11B polartty Is revenied, “OL” symbol will appear.
Before measurtng the diode on line, switch off the power supply of the circuit, and fu lly discharge all capacttora.
Open circuit vottege: about >2.2V
Do not input voltage higher than DC/AC 30V to avoid personal injuiy.

Capacitance Meuurament

Insert the red test lead to “signal inpur terminal, black to “COM” tarmlnal.
Switch the dial to • -; f- • posHion end connect the test probes with the capacitor in parallel. Measured capacltllnca :!i100nF: It Is recommended ID measure in “REL• mode.
II Is recommended to use short test leads for cepacitance measurement to reduce the effect of distributed capacilanca.

Notes :

If the mea,ured cepacllor Is short-<:lrculted or the cepacltance exceeds the maximum range, the “OL” symbol wlll appear on the 9a’8Bn.
When measurtng capacitance >400μF, It mey lake soma time 1D obtain steady and accurate reedings.
discharga all capaci1Drs before maesuring (especially for capacitors with high voltage) to avoid damage 1D the meter and personal injuiy.

Temperatunt Meuurvment

Insert the positive tempereture probe to the “algnal inpur terminal, negative 1D “COM” temiinal.
Switch the dial to “”C “F” position, LCD will display OL symbol. Sheri circuit the test probes to read the room temperature.
Attach 1he temperature probe to the surface of the measured object, reed its temperature value from the LCD display Iller II fllw seconds.
P1’8118 SELECT button to IIWilc:h between “F and “C

Notes:

The ambient temperature must not BXC1111d 1 S-28″C, otherwise it will cause measurement error.
The positive and negative poles of the temperature probe should be correctly oonnected to the meter. Do not measure non-insulated live objects to prevent error reeding.
Do not input voltage higher than DC/AC WI to avoid personal injury.

Non-contact AC Voltage Sensing (NCV, plclunt 4)

Whan the electric field is ~100V AC 50Hz/60Hz, and the NCV sensing part on 1he damp head is close to H (about :S15mm), the buzzer will keep beeping end the red LED will flash, along wHh “N’ segments appear on the LCD.
According to the intensity of the electric field, the buzzer beeps and the red LED flashes wHh varied frequencies. The higher the elaclric field intensity, the higher the buzzer frequency, and the higher the red LED flashing frequency.
16mm-80mm: buzzer on er off. >B0mm: buzz.er off. NAVAC NMC1 Digital
Electrical Clamp Meter FIG 5

Notes :

Plac:e the NCV sensing pert en the clemp head near the meesured elec:trtc field, otherwise the measurement sensitivity might be affected.
Measured electric: field :t100V AC: pay atlanlion ID the insulation d the conducmr in the electric field ID IIYDid pemonal inj.lry.

OTHER

Auto power off: If there Is no oparetlon for 15 minutes, the meter will automaHcally shut down to save power. You cen weke up the meter by pressing any button, er switch the dial to OFF and then restart 1he meter.
To disable auto power off, IIWilc:h the dial 1D OFF position, press the SELECT button end tum on the meter. Ycu can restart the meter to restore the auto power off function.
Buzzer: The buzzer will make a “beep” sound (about 0.25s) at any valid press or switch of the dial. When measuring voltage or current, the buzzer will also make intennittent “beep” sounds indicating over-range, es follDWB:
a)ACJDC voltage measurement> about 600V
b)ACJDC current meesurement >400A
Low betteiy detection: The meter will detec:t the intarnal VDD while wort<ing. If the vottage is <2.5V, the low battery symbol • a::!I • will appear on the LCD

Maintenance

warning :
Plsaae remove the tsat leads before opantn11 ths bottom cover to avoid •lectrlc shock. TUrn the meter OFF when It 11 not In use.

General Maintenance
a. The maintenance and service must be Implemented by qualified professionals or designated departments.
b. Periodically clean the case wHh a dry cloth. Do not use datergenls containing abrasives or solvents.

Battary lnatallallon and Repl■cemsnt
Power supply: AAA 1.5V battery x 2
a. Tum off the meter and remove the test leads from the input terminals.
b. Place the meter panel downward and loose the SCntW on the battery cover, remove the cover and replace the battartes according to the polertty Indication.
c. Please replace the batteries with the same specificetions.
d. Aftar installing the new batlaries, close tha babry cover and tighten the scraw. NAVAC NMC1 Digital Electrical Clamp Meter FIG 6