MULTI MEASURING INSTRUMENTS M-3000 User manual

AC CURRENT
ANALOG CLAMP-ON TESTER
MODEL M-3000
INSTRUCTION MANUAL
Thank you very much for selecting our digital AC clamp-on
tester.
Thismodeliscomplex instrument and employ a very reliable
mechanical/electronic design.
Before you use your new instrument, read this Instruction
Manual completely and familiarize yourself thoroughly with
all functions. With proper use and care, your tester will give
you years of satisfactory service.
MULTIMEASURINGINSTRUMENTSCO.,LTD.
Akihabara Murai Bldg. 7F, 1-26 Kanda Sakuma-cho,
Chiyoda-ku, Tokyo, Japan, 101-0025
TEL : [phone] FAX : [phone]
HomePage:http://www.mutimic.com/
E-mail:[email protected]

1. FEATURES
● High accuracy analog display with taut band meter.
● Meter hold function.
● AC/DC voltage resistance and temperature measurements.
2. △
!CAUTION
● Before operating this instrument, familiarize yourself with all instructions
outlined in this manual.
● Always check to make sure that the function switch is set to the proper position.
● When making measurements, use CAUTION as dangerous voltages may be
present in normally safe areas.
● To avoid electrical shock, use CAUTION when working above 60V DC or 25V AC
rms.
Such voltages pose a shock hazard.
● Never make measurements with the case opened.
● Never fail to keep the maximum tolerable input.
● Never operate this instrument if it becomes wet, damp or has any liquid
condensation build-up on any part of the instrument.
● Never make measurements for uninsulated conductors or bus bars.

3
. SPECIFICATIONS
Safety standard : Meets the requirements for double insulation to IEC 1010-2-032,
IEC 1010-1(1995), EN 61010-1(1995) installation Category Ⅲ
600V phase to earth.
E.M.C. standard : The instrument meets EN 50081-1 and EN 50082-1(1992)
Withstanding voltage : AC 5500V, 1 minute (between outer case and core of CT)
Jaw opening capability : 40mmφ
Current : AC 6A/15A/60A/150A/500A
Accuracy :±3% of F.S.(50/60Hz)
Voltage : AC 0~300V/600V DC 0~60V
Accuracy :±3% of F.S.(50/60Hz)
Resistance : 0~1KΩ/100KΩ(50Ω/5KΩcenter)
Accuracy :±3% of scale length
Temperature : ‐50℃to 200℃(Thermistor sensor)
Operating temperature : 0℃to 40℃, ＜80%RH (non-condensing)
Strange temperature :‐10℃to 60℃, ＜70%RH (non-condensing)
Power supply : 1.5V (“ AAA” size, R03) x2
Size : 69(W)x210.5(H)x34(D)mm
Weight : Approx. 403g
Accessories : Carrying case…………..1
Instruction manual……1
Batteries…………………1
Test lead…………………1set
Optional Accessories : MT-3000 Thermistor sensor probe

4. DIMENSIONS AND PANEL FUNCTION
① Current transducer(Jaw)
② Jaw opening lever
③ Range selector switch
④ Meter lock knob
⑤ ZeroΩadjustment knob
⑥ Pointer
⑦ Pointer zero adjustment screw
⑧ Input terminal(V)
⑨ COM terminal
⑩ Input terminal(Ω)
⑪ Battery cover
5. METHOD OF MEASUREMENT
5-1. Preparation and Caution before Measurement
● Before measurements, be sure the meter lock function is released.
● Set the Zero (0) position of the pointer. If the position is incorrect, adjust it by the
pointer zero adjustment screw.
5-2. Reading Method of The Scale
No. Function Range Multiplying
factor
①
Current
6A ×0.1
15A ×1
60A ×1
150A ×10
600A ×10
②
Voltage
~300V ×1
~600V ×1
… 60V ×0.1
③
Resistance
×1 ×1
×100 ×100
④Temperature ×100 ×1

5-3. Measurement of AC Line Current
① Set the range selector switch to a range
appropriate to the current to be measured.
Start the measurement at top range and
then work down to lower range.
② Clamp the conductor of the circuit at the
center of CT.
③ If you make measurements in a dark place
or in a place where it is difficult to see the
readings,usethemeterlockfunction. Fig.1
Note : Clamp around only one conductor of the circuit to be measured. (See Fig.1)
△
!CAUTION
● To avoid electrical shock or damage, the measurement is limited to the circuit
under 600V AC and 600A AC.
5-4. Measurement of AC Voltage
① Connect the plug of red test lead into
the “V” terminal and the plug of black
test lead into the “COM” terminal.
② Set the range selector switch to “~300V”
or “~600V” range appropriate to the
voltage to be measured.
③ Contact the tips of the test leads to the
circuit under test.
④Readthevoltageonthescale. Fig.2

△
!WARNING
Do not make measurements of power lines carrying more than 250V.
IN SOME CASES, POWER LINES MAY CARRY VOLTAGE SPIKES OF
SEVERAL TIMES OF THE NORMAL SUPPLY VOLTAGE. THIS
INSTRUMENT SHOULD NOT BE USED TO MEASURE POWER LINES.
* The term of “Power Line” mean the electrical circuit providing the power
to factories, buildings, and etc.
△
!WARNING
POSSIBLE ELECTRICAL SHOCK. Do not make measurements if the case
is damaged or the rear case is removed. Remove all electrical inputs before
removing the rear case.
△
!WARNING
POSSIBLE ELECTRICAL SHOCK or FIRE HAZARD. Do not expose this
tester to rain or moisture. Do not operate the tester in the presence of
flammable gases or fumes.
△
!CAUTION
To avoid damage to the tester, disconnect test leads before changing
functions. Do not exceed the maximum input limits.
5-5. Measurement of DC Voltage
①Connect the plug of red test lead into the “V” terminal and the plug of black test
lead into the “COM” terminal.
②Set the range selector switch to “ …60V” range.
③Contact the tips of the test leads to the circuit under test.
④Readthevoltageonthescale.

5-6. Measurement of Resistance
① Connect the plug of red test lead into
the “Ω” terminal and the plug of black
test lead into the “COM” terminal.
② Set the range selector switch to “×100”
or “×1” range appropriate to the resistance
to be measured.
③Short the tips of test leads and adjust the
pointer to indicate zero with the zeroΩ
adjustment knob.
④Contact the tips of the test leads to the
circuit under test.
⑤Read the resistance on theΩscale.
For×100 range, read the resistance
value with 100 times.
Fig.3
△
!CAUTION
Be sure all voltage is turned OFF in the circuit before making resistance
measurement.
5-7. Measurement of Temperature
Temperature measurement is available with MT-3000 thermistor probe (optional
accessory). Please refer to MT-3000 instruction manual about the measuring method.

6. REPLACEMENT OF BATTERIES AND FUSE
Turn the power switch to "OFF", prior
to installing batteries or fuse.
To install the batteries or fuse, remove
the battery cover located on the unit back.
Loosen the screw on the battery cover.
Replace the two batteries (UM-4 or
type AAA) with new ones, observing
polarity. Use high-quality batteries
which are guaranteed against leakage.
If the instrument is to be left unused
for long periods of time, to prevent
damage from leakage, remove the batteries.
△
!WARNING
Before changing batteries or fuse, removal all electrical input.
7. MAINTENANCE
When making requests for repair service, please bring the instrument directly to the
dealer. If this is impossible, however, send the instrument directly to our sales office.
When mailing this instrument, always pack it in its original or equivalent packing
material and pack together with name, address, telephone number and the warranty
documentation.
● To ensure speedy and reliable repair, always include information as the type of
failure and cause.
● If required, always return accessories with the instrument.
● When contacting us, provide the model number and serial number of your
instrument.