Meco 4671 Manuale utente
4671 : 28-09-2012
®
AC LEAKAGE
CURRENT
TESTER
MODEL : 4671
USER MANUAL
43
2
EN 61010-2-032
CAT II 600V
CAT III 300V
Pollution Degree 2
Definition of Symbols :
Caution : Refer to Accompanying Documents
Caution : Risk of Electric Shock
Double Insulation
Over-voltage Category I (CAT I) :
Equipment for connection to circuits in which measures are taken
to limit the transient over-voltages to an appropriate low level.
Over-voltage Category II (CAT II) :
Energy-consuming equipment to be supplied from the fixed
installation.
Over-voltage Category III (CAT III) :
Equipment in fixed installations.
WARNING :
If the clamp meter is used in a manner Not specified by
the manufacturer, the protection provided by the clamp
meter may be impaired.
TABLE OF CONTENTS
1. Features ............................................................................... 4
2. Panel Description ................................................................. 5
3. Operation Instructions ......................................................... 8
3.1. AC Leakage Current Measurement .............................. 8
3.1.1. Leakage Current Flowing into Ground Conductor .. 8
3.1.2. Out of Balance Leakage Current ............................ 9
3.1.3. Using the 50/60 and Wide Selector ...................... 10
3.2.AC Load Current Measurement .................................. 10
3.3.AC Voltage Measurements .......................................... 11
3.4.Resistance and Continuity Measurement ................... 11
3.5.Relative Reading Measurements ................................ 12
3.6.Holding the LCD Reading ........................................... 12
3.7.Finding the MAX/MIN Value ........................................ 12
3.8.Auto-Power-Off ............................................................ 12
4. Specifications .................................................................... 13
5. Battery Replaement ........................................................... 15
6. Maintenance & Cleaning ................................................... 15
1. Features
1. Accurate AC digital clamp meter for leakage current
measurement.
2. 10mA high resolution on 40mA range.
3. Shield transformer jaws to minimize the effect of external
stray magnetic field.
4. Large jaw with 30 mm diameter.
5. Five Ranges (40mA, 400mA, 4A, 40A, 60A) for all
application.
6. A filter circuit is designed to eliminate the effect of high
frequency noise and harmonics for AC current
measurement.
7. Large 3 3/4 digits LCD
8. Fast bargraph display (20 times/sec.) for transient
observation.
9. Continuity and frequency measurements.
10. Max/Min, Data Hold functions and Relative
Measurement
11. 600V overload protection for ohm measurement.
12. Easy single rotary switch for any function selection.
4671 : 28-09-2012
(the third push), clamp meter return to normal measurement
mode. The Zero/Relative function will be disabled if Max/Min
function is enabled.
7. Zero/Relative Button
Once this button is prcssed, the current reading shall be set
to zero and be used as a zero reference value for all other
subsequent measurement. This fucntion will be disabled when
MAX/MIN function is enabled.
8. LCD
This is a 3¾ digit Liquid Crystal Display with maximum
indication of 3999. Function symbols, units, bargraph, sign,
decimal points. low battery symbols, max/min symbols and
zero symbol are included.
9. Low Battery Symbol
When this symbol appears, it means the battery voltage drops
below the minimum required voltage. Refer to Section V for
battery replacement.
10. Zero/Relative Symbol
When this symbol appears, it means a reference value has
been subtracted from the actual reading. The reading shown
is a offseted value. Press and hold the zero button for 2
seconds to disable this function.
11. Data Hold Symbol
Once the hold button is pressed, this synibol appears on LCD.
12.Bargraph
Bargraph has forty segments. It displays segments proportional
to the actual reading. Each segment represent one count.
13. Max/Min Hold Symbol
Once the max/min button is pressed, either MAX or MIN shall
be displayed on LCD
14. Continuity Symbol
lf ohm and continuity function is selected, this symbol shall
appears on LCD.
15. Units Symbols
Once a function is selected, corresponding unit (V, V, A or Hz)
shall be displayed on LCD.
16. VVInput Terminal
This terminal is used as input for voltage or ohm/continuity
measurements.
17. COM Terminal
This terminal is used as common reference input.
18. Hand Strap
Put your hand through the hole of hand strap to avoid
accidental drop of the clamp meter.
56
2. Panel Description
1. Transformer Jaw
This is used to pick up current signal. To measure DC/AC
current, conductor must be enclosed by the jaw.
2. Transformer Trigger
This is used to open the jaw.
3. Function Selector Switch
This is used to sclect the function user desired, such as ACV,
ACA, Ohm and Continuity.
4. Frequency Selection Switch
At 50/60Hz position, only the low frequency signal is measured.
At Wide position, signal from 40 - 1KHz is measured.
5. Data Hold Button
Once this button is pushed, reading shall be held on the LCD.
Press again to release it.
6. Max/Min Hold Button
This button is used to enable the maximum or minimum value
to be displayed and updated during measurement. Press once,
minimum value shall be displayed and updated. Press again,
maximum value shall be displayed and updatcd. Press again
87
3. Operation lnstructions
3.1. AC Leakage Current Measurement
3.1.1. Leakage Current Flowing into Ground Conductor
a. Set the rotary switch at desired range.
b. Press the trigger to open the jaw and fully enclose the
wire goes to the ground. Make sure the two half jaws
are properly closed.
c. Read the measured value from the LCD display.
WARNING : Make sure that all the test leads are disconnected
from the meter’s terminals for current measurement.
4671 : 28-09-2012
9
3.1.2. Out of Balance Leakage Current a. Set the rotary switch at desired range
b. Press the trigger to open the jaw and fully enclose all two
wires (single phase, two wires), three wires (three phases,
three wires) or four wires (three phases, four wires). Make
sure the two half jaws are properly closed.
c. Read the measured value from the LCD display.
3.1.3. Using the 50/60 and Wide Selector
50/60 Position
This clamp meter has very good frequency response due to
the electric property of the transformer jaws used. There
fore, the measurement result contains not only the fundamental
frequency of 50/60Hz but also the high frequencies and
harmonics superimposed on the fundamental frequency. To
eliminate the effect of high frequency noise, a low pass filter is
designed to filter out high frequency signal. To enable the
fiiter, set the switch at the 50/60 position. The filter’s cut-off
frequency is set at 100Hz with an attenuation characteristic
of approx. 24dB/octave.
Wide Position
If the circuit under test is originated from a high frequency
generating device such as invertcr, switching regulators, etc.,
then the switch should be set at wide position to measure the
signal which contains the frequency from 40Hz - 1KHz.
To make sure thc presence of high frequency signal, set the
switch at 50/60 and wide position to see the difference. If the
reading is very different, it is certain that the high frequency
signals or harmonics present.
3.2. AC Load Current
Measurement
LOAD LAKAGE
CURRENT CURRENT
a. Set the rotary swit-h at desired range.
b. Press the trigger to open the jaw and fully enclose only one
wire. No air gap is allowed between the two half jaws.
c. Read the measured value from the LCD display.
3.3. AC Voltage Measurements
WARNING : Maximum input for DC V is 600, and for AC V is 600.
Do not attempt to take any voltage measurement that exceeds
the limits. Exceeding the limits could, cause electrical shock and
damage to the clamp meter.
a. Set the rotary switch at 400V
b. Insert the test leads into the input jack.
c. Connect the test prods of the test leads in PARALLEL to
the circuit to be measured.
d. Read the measured value from the LCD dispiay.
WARNING : Before taking any in-circuit resistance mcasurement,
remove power from the circuit being tested and discharge all the
capacitars.
3.4. Resistance and Continuity Measurement
3.4.1. Set the rotary switch at V
3.4.2. Insert the test leads into the input jack.
3.4.3. Connect the test prods of the test leads to the two ends
of the resistor or circuit to be measured. 1211
10
3.4.4. Read (he measured value from the LCD dispiay.
3.4.5. If the resistance is lower than 40V, a beeping sound
shall be heard.
3.5. Relative Reading Measurements
The zero button also can be used to make a relative
measurement. Once the button is pushcd, the currcnt reading
is set to zero and a zero symbol shall be displayed on LCD.
All the subsequent measurement shall be displayed as a relative
value with respecl to the value being zeroed. Press the zero
button for 2 seconds to return to normal mode.
3.6. Holding the LCD Reading
Press the HOLD button, then the reading shall be hold and
kept on LCD.
3.7. Finding the MAX/MIN Value
Press the MAX/MIN button to enable the maximum and
minimum values to be recorded and updated during
measurement. Push the button once,the maximum value shall
be displayed and updated. Push again (second push), the
minimum value shall be displayed. Push again (third push),
MAX/MIN function shall be disabled and return to the normal
measurement mode.
3.8. Auto-Power-Off
The meter will turn itself off 30 minutes after power-on. To turn
it on again, user can either press the HOLD bulton or turn the
power off and turn it on again.
To disable the Auto-Power-Off function, hold the HOLD button
while turning on power.
4671 : 28-09-2012
15 16
Operating Temperature : -100C to 500C
Operating Humidity : less than 85% relative
Storage Temperature : -200C to 600C
Storage Humidity : less tban 75% relative
Altitude : up to 2000M
Dimensions : 210 x 62.0 x 35.6mm (approx.)
Weight : 200gms including battery (approx.)
Accessories : Carrying bag x 1
Instruction manual x 1
1.5V battery (installed) x 2
Pair of test leads x 1
5. Battery Replacement
When the low battery symbol is displayed on the LCD, replace
the old batteries with two new batteries.
5.1. Turn the power off and remove the test leads from the
clamp meter.
5.2. Remove the screw of the battery compartment.
5.3. Lift and remove the battery compartment.
5.4. Remove the old batteries.
5.5. lnsert two new 1.5V SUM-3 batteries.
5.6. Replace the battery compartrnent and secure the screw.
6. Maintenance & Cleaning
Servicing not covered in this manual should only be performed
by qualified personnel. Repairs should only be performed by
qualified personnel.
Periodically wipe the case with a damp cloth and detergent;
do not use abrasives or solvents.
®
Certificate of Calibration
We hereby certify that this product has been
calibrated and found to be in accordance
with the applicable SPECIFICATIONS and
STANDARDS.
Accuracies of the standard equipment used in
this calibration are traceable to the National
Standards.
SR. NO. :
CHECKED BY :
DATE :
MODEL NO. :
MECO METERS PVT. LTD.
Plot No. EL-60, MIDC Electronic Zone, TTC Industrial
Area, Mahape, Navi Mumbai - 400710 (INDIA)
Tel : 0091-22-27673311-16, 27673300 (Board)
Fax : 0091-22-27673310, 27673330
Web : www.mecoinst.com
4. Specifications (230C ± 50C)
AC Current :
Accuracy
Range Resolution 50/60 Hz Wide(40 - 1KHz)
40mA 10mA ±1.0%±3dgts ±2.0%±5dgts
400mA 100pmA ±1.0%±3dgts ±2.0%±5dgts
4A 1mA ±1.0%±3dgts ±2.0%±5dgts
40A 10mA ±1.0%±3dgts ±2.0%+5dgts
60A(0-50A) 100mA ±1.5%±3dgts ±3.0%±5dgts
60A(50 - 60A)
1
100mA ±3.0%±5dgts ±3.5%±5dgts
1
Though the metcr can display up to 400A, it is not calibrated
beyond 60A
AC Voltage : (Input Impedance : 10MV)
Accuracy
Overload
Range Resolution 50/60 Hz Wide(40 - 1KHz)
Protection
400V 0.1V ±1.5%±2dgts ±2.0%±4dgts AC 800V
Resistance (VV
VV
V) and Continuity : (open voltage 0.4V)
Range Resolution Accuracy Beeping OL Protection
40-400V0.1V±1.0%±2dgts < 38.0 VAC 600V
Indoor Use
Conductor Size : 30mm max. (approx.)
Battery Type : two 1.5V SUM-3
Display : 3¾ LCD with 40 seg. bargraph
Range Selection : manual
Overload Indication : left most digit blinks
Power Consumption : 10 mA (approx.)
Low battery Indication : B
Sampling Time : 2 times/sec. (display)
20 times/sec. (bargraph)
13 14
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