Kusam-meco 2781 Manual

Kusam-meco 2781 Manual

1000a dc/ac digital clamp meter

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An ISO 9001:2008 Company
FEATURES :
Overload protection on all ranges.
Maximum Voltage between any
terminal and earth ground 600V rms
Dual slope integration
GENERAL SPECIFICATIONS :
Sensing : Average sensing (Model 2781)
True RMS sensing (Model 2781-T)
Jaw opening size : cables
Display : 3 ¾ digit 3999 counts liquid
crystal LCD display.
Over range indication : Display of "OL"
on LCD at the highest position means
range selection too low for the input.
(Except for ranges of 1000A AC, &
600V AC / DC)
Polarity : Symbol "-" automatic displayed
for negative input.
ACCESSORIES :
Test leads (pair), Battery installed, User's manual, K-Type Thermocouople(model 2781-T) & Carrying case.
Accuracy are : ±(% of reading + number of digits) at 18°C to 28°C with relative humidity below 80%R.H.
CAPACITANCE
Range
Accuracy
Resolution
±(2.5%rdg+10dgts)
40
nF
0.01nF
400 nF
0.1 nF
±(2.0%rdg+4dgts)
4
F
1
nF
40
F
10 nF
Unspecified
100
F
10 nF
Overload Protection : 250V rms
FREQUENCY
Range
Resolution
10Hz
Unspecified
0.001Hz
(2781only)
0.01 Hz
100Hz
0.1
Hz
1KHz
±(0.5%rdg+3dgts)
1
Hz
10KHz
100KHz
10
Hz
1MHz
100 Hz
1
KHz
10MHz
Unspecified
Over load protection : 250Vrms
Sensitivity : 1V
DIODE & CONTINUITY TEST
Range
Description
Display read approx. Forward
voltage of diode.
Accuracy ± (3.0%rdg+3)
If the resistance is less than 50 ,
the beeper sounds continuously
Overload Protection : 250V RMS
®
An ISO 9001:2008 Company
Chhaya Computer/D:/Chhaya/Coreldraw Files/New catlogs Dec 2011/2781-2781-T.cdr
®
1000A DC/AC DIGITAL CLAMP METER
Data-hold facility
DCA zero button for accurate reading
Low battery indication
Auto power off
Sampling rate : 3 times per second (Digital display)
Auto power off : The meter is automatically powered off after idling
for 15 minutes. To awake the meter, turn the rotary function switch
40mm
or push any button.
Operating Temperature & Humidity : 0°C to 40°C; < 80% R.H.
Non-condensing
Low battery : The symbol "
weak and below the operating Voltage. Replace batteries immidiately.
Battery life : Approx. 60 hrs continuously use with alkaline batteries.
Power supply : 1.5V AAA x 2
Dimension : 228(L) x 76(W) x 39(H) mm
Weight : approx. 465gms. (Including batteries)
ELECTRICAL SPECIFICATIONS : 2781 / 2781-T
DC CURRENT
Range
40
(2781-T)
400
A
1000 A
Overload Protection : 1200A
DC VOLTAGE
Accuracy
Range
400 mV
(2781-T)
4
40
400
1000 V
Overload protection : 1200Vrms
Input Impedance : 10M
RESISTANCE
Range
400
4
K
40
K
400 K
4
M
40
M
Overload Protection : 250V rms
G-17, Bharat Industrial Estate, T. J. Road, Sewree (W), Mumbai - 400 015. INDIA.
Sales Direct.: 022 -24156638,
Email : kusam_meco@vsnl.net,
Model 2781 / 2781-T(True RMS)
9 FUNCTIONS 32 RANGES
" is displayed when the batteries are
Accuracy
Resolution
A
10 mA
± (2%rdg + 5dgts)
0.1 A
1
A
Accuracy
Resolution
±(1.0%rdg+5dgts)
0.1 mV
V
0.001 V
V
±(0.8%rdg+2dgts)
0.01 V
V
0.1
V
±(1.0%rdg+2dgts)
1
V
Accuracy
Resolution
±(1.2%rdg+8dgts)
0.1
1
10
±(1.0%rdg+2dgts)
100
1
K
± (2%rdg+5dgts)
10 K
All Specifications are subject to change without prior notice
Tel. : 022-241224540, 24181649,
AC CURRENT
Range
Accuracy
Resolution
40
A
10 mA
(2781-T)
± (2%rdg + 5dgts)
400
A
0.1 A
1000 A
1
A
Overload Protection : 1200A
AC VOLTAGE
Range
Accuracy
Resolution
400 mV
±(1.8%rdg+5dgts)
0.1 mV
(2781-T)
4
V
0.001 V
40
V
±(1.0%rdg+5dgts)
0.01 V
400
V
0.1
V
±(1.5%rdg+5dgts)
750
V
1
V
Overload protection : 660Vrms
Input Impedance : 10M
Frequency Response : 40Hz ~ 450Hz for 400V & below,
40Hz ~ 100Hz for 750V
TEMPERATURE (2781-T)
Range
Accuracy
Resolution
o
o
o
±(2.5%+3 C)
-40 C~1000 C
1 C
o
o
o
-40 F~1820 F
±(2.5%+5 F)
1 F
Type-K thermocouple range & accuracy not specified
Supplied K-type thermocouple suitable for 250°C.
DUTY CYCLE
Range
Accuracy
Resolution
0.1% ~ 99.9%
Fax : 022 - 24149659
Website : www.kusamelectrical.com
o
o

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Summary of Contents for Kusam-meco 2781

  • Page 1 ACCESSORIES : Test leads (pair), Battery installed, User’s manual, K-Type Thermocouople(model 2781-T) & Carrying case. ELECTRICAL SPECIFICATIONS : 2781 / 2781-T Accuracy are : ±(% of reading + number of digits) at 18°C to 28°C with relative humidity below 80%R.H.
  • Page 2 ® USE TRUE RMS WHEN MEASURING AC WAVEFORMS The waveforms on today’s AC power lines are anything but clean. Electronic equipment such as office computers, with their switching power supplies, produce harmonics that distort power-line waveforms. These distortions make measuring AC voltage inaccurate when you use an averaging DMM.
  • Page 3 2781 INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. “KUSAM-MECO” SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES, INCLUDING LOSS OF DATA, ARISING FROM ANY CAUSE WHATSOEVER.
  • Page 4: Table Of Contents

    Table of Contents TAKE MEASUREMENT CAREFULLY AND YOU’LL Title Page SPARE YOUR METER AND YOURSELF, SOME PAIN Overview.............1 Nearly every electrical engineer has a hand held Unpacking Inspection ........digital clamp meter (Tongtester). We sometimes take Specifications them for granted, until we damage them or “burn them A.
  • Page 5: Unpacking Inspection

    Unpacking Inspection Overview Open the package case and take out the Clamp Meter Warning from the carrying case. Check the following items To avoid electric shock or personal injury, read the carefully to see any missing or damaged part : “Safety Information”...
  • Page 6: Specifications

    Electrical Specifications SPECIFICATIONS Accuracy : ±(% reading + digits) GENERAL SPECIFICATIONS : Operating temperature : 23°C±5°C Maximum voltage including transient overvoltage Relative humidity : < 75% R.H. between any terminals and grounding : 750Vrms. Display ¾ digits (3999 Counts) AC Current LCD for Accurate Reading.
  • Page 7: Dc Voltage

    Frequency & Duty Cycle (Auto Ranging) DC Voltage (Auto ranging) Range Resolution Accuracy Sensi- Range Resol- Accuracy Overload 0.001 V protection tivity ution ±(0.8%+2) 0.01 V 10Hz 0.001Hz Unspecified 400 V 0.1 V 100Hz 0.01Hz ±(1.0%+2) 1000 V 1KHz 0.1Hz 10KHz ±(0.5%+3) 250Vrms...
  • Page 8: Rules For Safe Operation

    RULES FOR SAFE OPERATION RULES FOR SAFE OPERATION (2) Warning Disconnect circuit power and discharge all high- voltage capacitors before testing resistance, To avoid possible electric shock or personal injury, and continuity, diodes, or current. to avoid possible damage to the Meter or to the equipment under test, adhere to the following rules : Replace the battery as soon as the low battery indicator appears.
  • Page 9: International Electrical Symbols

    International Electrical Symbols THE CLAMP METER STRUCTURE AC (Alternating Current). DC (Direct Current). Both DC & AC. Grounding. DC/AC 2781 2754 CLAMP METER Double Insulated. HOLD PEAK 1000 Deficiency of Built-In Battery. 1000 Continuity Test. DCA ZERO 1000 Diode. 600V...
  • Page 10: Display Symbols

    5) Data Hold button : DISPLAY SYMBOLS Press it once to hold the measured value and Auto store the value in memory. Press again to 3999 release the hold fuction. 6) Rotary switch : For selecting of desired range, and exiting No.
  • Page 11: Measurement Operation A. Ac Current Measurement

    Make sure that the clamp jaw is perfectly closed. 3. Read the displayed value. The measured value is shown on the display, it is an effective value of sine wave (mean value response). 2781 DC/AC CLAMP METER Caution Hz/DUTY HOLD SELECT...
  • Page 12: Ac Voltage Measurement

    Warning Warning Make certain that all test leads are disconnected To avoid harms to you or damages to the Meter from the meter terminals. from electric shock, do not attempt to measure 1. Set the function / range switch to the A range. voltage higher than 1000V DC &...
  • Page 13: Dc Voltage Measurement

    D) DC Voltage Measurement Caution In each range, the Meter has an input impedance of 10M This loading effect can cause the measurement errors in high impedance circuits. If the circuit impedance is less than or equal to 10k , the error is negligible (0.1 or less). When DC voltage measurement has been completed, disconnect the connection between the testing leads and the circuit under test and...
  • Page 14: Capacitance Measurement

    The resistance ranges are : When resistance measurement has been 400.0 , 4.000k , 40.00k , 400k , 4.000M and completed, disconnect the connection between the testing leads and the circuit under test and 40.00M remove testing leads from the input terminals. To measure resistance, connect the Meter as follows : Caution 1.
  • Page 15: Testing Diodes

    G) Frequency & Duty Cycle H. Testing Diodes DC/AC 2781 CLAMP METER HOLD PEAK 1000 1000 DCA ZERO Black...
  • Page 16 I) Testing for continuity (see figure 10) Use the diode test to check diodes, transistors and other semiconductor devices. The diode test sends a current through the semiconductor junction, then measure the voltage drop across the junction. A good silicon junction drops between 0.5V and 0.8V. To test the diode out of a circuit, connect the Meter as follows : 1.
  • Page 17: Sleep Mode

    B. Replacing the Battery Sleep Mode To preserve battery life, the Meter automatically turns off Warning if you do not turn the rotary switch or press any button for around 15 minutes. To avoid false readings, which could lead to The meter can be activated by turning the rotary switch possible electric shock or personal injury, replace or pressing any button.
  • Page 18: Test Certificate

    MUMBAI WARRANTY TEST CERTIFICATE Each “KUSAM-MECO” product is warranted to be free from defects in material and workmanship under normal DIGITAL CLAMPMETER use & service. The warranty period is one year (12 months) and begins from the date of despatch of goods.

This manual is also suitable for:

2781-t

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