An ISO 9001:2008 Company

®

3¾ DIGITS DIGITAL CLAMPMETER + MULTIMETER

MODEL - KM 111M / KM 112M

Model KM 111M - Average Sensing - 18 FUNCTIONS 30 RANGES

KM 112M - True RMS Sensing - 19 FUNCTIONS 30 RANGES

SPECIAL FEATURES :

Transient protection

6.5KV (1.2/50 m

GENERAL SPECIFICATIONS :

Sensing : Average sensing (KM 111M ); True RMS Sensing (KM 112M)

Jaw Opening Size : 26mm

Basic Accuracy : 0.5%

Display : 3¾ Digits 4000 counts LCD display

Update Rate : 3 per second nominal

Polarity : Automatic

Low Battery : Below approx. 2.4V.

í O O

Operating Temperature: 0 C to 40 C.

í O

Relative Humidity: Maximum relative humidity 80% for temperature upto 31 C decreasing linearly to

Altitude : Operating below 2000m

í -20 C ~ 60 C,< 80% R.H. (With Battery removed)

í Nominal 0.15 x (specified accuracy) / C @ (0 C ~ 18 C or 28 C ~ 40 C),

or otherwise specified.

Power Supply : Single 3V coin Battery IEC CR-2032.

Power Consumption : 2.8mA typical, except 3.3mA typical for current function.

APO Timing : Idle for 30 minutes.

í 5 m

Dimension : 190(L) x 63(W) x 32(H)mm

Weight : Approx. 139gm

Safety :

Safety : Meets IEC61010-2-032, EN61010-2-032, UL61010B-2-032, IEC61010-1 2nd Ed.,

EN61010-1 2nd Ed., UL61010-1 2nd Ed.

Measurement Category : CAT III 600 Volts AC & DC.

Pollution degree : 2

E.M.C. : Meets EN61326 (1997, 1998/A1), EN61000-4-2 (1995, 2000/A2), and EN61000-4-3 (2002)

In an RF field of 3 V/m :

Capacitance function is not specified.

Total Accuracy = specified Accuracy + 65 digits.

Other function ranges :

Total Accuracy = Specified Accuracy + 45 digits.

Performance above 3V/m is not specified.

Overload Protections :

ACA Clamp-on jaws : AC 600A rms Continuous.

+ / m

Transient protection : 6.5KV (1.2/50 S surge)

CAT III

600V

Ultra Slim jaw

ACCESSORIES :

Test lead pair, Battery installed, User’s Manual & Carrying case.

Navin.com/D.drive/sandeep gupta/New catlog Dec 2011/KM-111M/112M.Cdr

All Specifications are subject to change without prior notice

ELECTRICAL SPECIFICATIONS : KM 111M / KM 112M

0 O

Accuracy is ± (% reading digits + number of digits) or otherwise specified, at 23 C ± 5 C & less than 75% R.H.

True RMS accuracy of ACV is specified from 5% to 100% of range, & ACA is specified from 10% to 100% of range, or otherwise specified. Maximum Crest Factor <1.75 : 1 at full scale & <3.5 : 1 at half scale, and with frequency spectrums, besides fundamentals, fall within the meter specified AC bandwidth for non-sinusoidal waveforms.

AC CURRENT (CLAMP-ON) (50HZ / 60HZ)

Range Resolution Accuracy 1)2)3)

40.00 A 10 mA

400.0 A

600 A

100 mA

1 A

±(1.5%rdg + 8dgts)

1)

Induced error from adjacent current-carrying conductor : 0.05/A

2) Specified accuracy is from 1% to 100% of range and for

measurements made at the jaw center. When the

conductor is not positioned at the jaw center, position

errors introduced are:

Add 2% to specified accuracy for measurements made

BEYOND jaw marking lines (toward jaw opening)

3) Add 8d to specified accuracy @ reading < 10% of range.

HZ FREQUENCY

Function Sensitivity (sine Rms)

400.0 mV

4.000 V

350 mV

40.00 V

400.0 V

600 V

400.0 A

1 V

32 V

90 V

500 V

60 A

Display counts : 5000

Best Resolution : 0.001Hz

Accuracy : ±(0.5%rdg + 4dgts)

Range

10Hz ~ 2KHz

5Hz ~ 5KHz

5Hz ~ 100KHz

5Hz ~ 10KHz

5Hz ~ 5KHz

40Hz ~ 400Hz

AC VOLTAGE (50HZ ~ 500HZ)

Range Resolution

4.000 V 1 mV

40.00 V 10 mV

Accuracy

±(1.5%rdg + 5dgts)

400.0 V

600 V

100 mV

1 V ±(2.0%rdg + 5dgts)

CMRR : > 60dB @ DC to 60Hz, Rs=1k W

Input Impedance : 10 M W

DC VOLTAGE

Range Resolution

400.0 mV

Accuracy

100 V ±(0.3%rdg + 4dgts)

4.000 V 1 mV

40.00 V

400.0 V

10 mV ±(0.5%rdg + 3dgts)

600 V

100 mV

1 V ±(1.0%rdg + 4dgts)

NMRR : > 50dB @ 50/60Hz

CMRR : > 120dB @ DC, 50/60Hz; Rs=1K W

Input impedance : 10 M W

(1000M W

RESISTANCE

Range Resolution Accuracy

400.0 W 0.1 W ±(0.8%rdg + 6dgts)

4.000 K W 1 W

40.00 K W 10 W

±(0.6%rdg + 4dgts)

400.0 K W 100 W

4.000 M W 1 k W ±(1.0%rdg + 4dgts)

40.00 M W 10 k W ±(2.0%rdg + 4dgts)

Open Circuit Voltage : 0.4VDC typical

CAPACITANCE

Range 1)

500.0 nF

5.000 m

50.00 m

500.0 m

3000 m

Resolution

100 pF

1 nF

10 nF

100 nF

1 m

Accuracy 2) 3)

±(3.5%rdg + 6dgts)

1) Additional 50.00nF range accuracy is not specified.

2) Accuracies with film capacitor or better

3)

Specified with battery voltage above 2.8V (approx. half full battery).

Accuracy decreases gradually to 12% at low battery warning

voltage of approx. 2.4V.

DIODE TESTER

Open Circuit Voltage

< 1.6 VDC

Test Current (typical)

0.25mA

AUDIBLE CONTINUITY TESTER

Audible threshold between 20 W .

MAX HOLD (WHERE APPLICABLE)

Specified accuracy ± 50 digits for changes

> 25ms in duration.

All specifications are subject to change without prior notice.

An ISO 9001:2008 Company

®

G-17, Bharat Industrial Estate, T. J. Road, Sewree (W), Mumbai - 400 015. INDIA.

Sales Direct.:

022 -24156638,

Tel. :

022-241224540, 24181649,

Fax :

022 - 24149659

Email :

[email protected],

Website :

www.kusamelectrical.com

Navin.com/D.drive/sandeep gupta/New catlog Dec 2011/KM 111M/112M.cdr

®

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.

Average voltage measurements work fine when the signal you’re measuring is a pure sine wave, but errors mount as the waveform distorts. By using true RMS measurements, however, you can measure the equivalent heating effect that a voltage produces, including the heating effects of harmonics. Table 1 shows the difference between measurements taken on averaging DMMs & those taken on true RMS DMMs. In each case, the measured signal’s peak-to-peak value is 2V. Therefore, the peak value is 1V.

For a 1-V peak sine wave, the average & RMS values are both 0.707V. But when the input signal is no longer a sine wave, differences between the RMS values & the average readig values occur. Those errors are most prominent when you are measuring square waves

& pulse waveforms, which are rich in harmonics.

Table 1. Average versus true RMS comparison of typical waveforms.

Waveform

Sine Wave

Triangle Wave

Square Wave

Pulse (25% duty Cycle)

Pulse (12.5% duty Cycle)

Pulse (6.25% duty Cycle)

Actual

Pk-Pk

2.000

2.000

2.000

2.000

2.000

2.000

True RMS

Reading

0.707

0.577

1.000

0.433

0.331

0.242

Average

Reading

0.707

0.555

1.111

0.416

0.243

0.130

Reading

Error

0%

-3.8%

+11.1%

-3.8%

-26.5%

-46.2%

One limitation to making true RMS measurements is crest factor, and you should consider crest factor when making AC measurements.

Crest factor is the ratio of a waveform’s peak (”crest”) voltage to its RMS voltage. Table 2 shows the crest factors for ideal waveforms.

Table 2. Crest factors of typical waveforms.

Waveform Crest Factor

DC

Square Wave

Sine Wave

Triangle Wave

Pulse (25% duty Cycle)

Pulse (12.5% duty Cycle)

Pulse (6.25% duty Cycle)

1.000

1.000

1.414

1.732

1.732

2.646

3.873

A DMM’s specifications should tell you the maximum crest factor that the meter can handle while maintaining its measurement accuracy. True RMS meters can handle higher crest factors when a waveform’s RMS voltage is in the middle of the meter’s range setting. Typically, a DMM may tolerate a crest factor of 3 near the top of its scale but it might handle a crest factor of 5 that’s in the middle of the range. Therefore, if you’re measuring waveforms with high crest factors (greater than 3), you should adjust the DMM so the measured voltage is closest to the center of the measurement range.

Another limitation of true RMS is speed. If you’re measuring relatively clean sine waves, then you can save time & money by using as averaging DMM. True RMS meters cost more than averaging meters and can take longer to produce measurements, especially when measuring millivolt-level AC signals. At those low levels, true RMS meters can take several seconds to stabilize a reading. Averaging meters won’t leave you waiting.

D:/Chhaya/Coreldraw files/True RMS when measuring AC waveforms.cdr

LIST OF PRODUCTS

* Digital Multimeter * Digital AC & AC/DC Clampmeter

* AC Clamp Adaptor * AC/DC Current Adaptor

* Thermo Anemometer * Thermo Hygrometer

* Distance Meter * Digital Lux Meter

* Network Cable Tester * Power Factor Regulator

* Earth Resistance Tester * Digital Panel Meters

* DC Power Supplies * High Voltage Detector

* Calibrators * Gas Analysers

* Frequency Counter * Function Generator

* Phasing Sticks * Battery Tester

* Waterproof Pen Testers * Solar Power Meter

* EMF Detector

* Wood, Paper & Grain Moisture Meter

* Transistorised Electronic Analog & Digital Insulation

Resistance Testers(upto 10 KV)

* Digital Sound Level Meter & Sound Level Calibrator

* Digital contact & Non-contact Type Tachometer

* Digital Non-contact (infrared) Thermometer

* Maximum Demand Controller/Digital Power Meter

* Digital Hand Held Temperature Indicators

17, Bharat Industrial Estate, T. J. Road, Sewree (W),

Mumbai-400015. INDIA

Sales Direct: (022)24156638 Tel.: (022) 2412 4540, 2418 1649

Fax: 91-22-2414 9659 E-mail : [email protected],

Website : www.kusamelectrical.com; www.kusam-meco.co.in

An ISO 9001:2008 Company

TRUE RMS

DIGITAL CLAMPMETER

+ MULTIMETER

MODEL - KM 111M /

KM 112M

OPERATION MANUAL

TAKE MEASUREMENT CAREFULLY AND YOU’LL SPARE YOUR

METER AND YOURSELF, SOME PAIN

Nearly every electrical engineer has a hand held digital clamp meter

(Tongtester). We sometimes take them for granted, until we damage them or “burn them out”. If you incorrectly connect your clamp meter to a circuit, or if you have the clamp meter on wrong setting, you damage the meter and possibly hurt yourself. You can also get into trouble if you try to measure the voltage across a charged capacitor.

Clamp meter users frequently burn their meters by trying to measure current the same way as they measure voltage. Remember, you measure voltage across a circuit, and current through a circuit. When you use the current input, your clamp meter becomes a low impedance circuit element.

Even if you correctly insert your clamp meter in to the circuit, you can still damage your meter. Don’t try to measure current in excess of your meter’s capacity. Check the current capacity of the Clamp meter.

If you are measuring current in industrial environment to prevent excess current from flowing through your meter, always disconnect your test leads from the circuit under test whenever you change Clamp meter functions. Set your meter to the correct function, say current, and its highest range for the setting. If the reading is small, change the range to the next lower range till the reading can be read with the best possible accuracy. When measuring voltage, connect the test leads before your apply power to your circuit. To be safe, start by setting your meter to its highest range first.

SAFETY

This manual contains information and warnings that must be followed for operating the instrument safely and maintaining the instrument in a safe operating condition. If the instrument is used in a manner not specified by the manufacturer, the protection provided by the instrument may be impaired.

The meter meets the requirements for double insulation to

IEC61010-2-032, EN61010-2-032, UL61010B-2-032,

IEC61010-1 2nd Ed., EN61010-1 2nd Ed., UL61010-1 2nd Ed.

Category III 600Volts ac and dc.

Per IEC61010 Overvoltage Installation Category

Overvoltage Category II

Equipment of Overvoltage Category II is energy-consuming equipment to be supplied from the fixed installation.

Note : Examples include household, office, and laboratory

appliances.

Overvoltage Category III

Equipment of Overvoltage Category III is equipment in fixed installations.

Note : Examples include switches in the fixed installation and

some equipment for industrial use with permanent

connection to the fixed installation.

Overvoltage Category IV

Equipment of Overvoltage Category IV is for use at the origin of the installation.

Note : Examples include electricity meters and primary over-

current protection equipment.

-1-2-

7

7

-3-

Average (KM 111M); True RMS (KM112M)

- 4-

-5-

Accuracy is ± (% reading digits + number of digits) or otherwise specified, at 23°C ± 5°C & less than 75% R.H.

True RMS accuracy of ACV is specified from 5% to 100% of range, &

ACA is specified from 10% to 100% of range, or otherwise specified.

Maximum Crest Factor <1.75 : 1 at full scale & <3.5 : 1 at half scale, and with frequency spectrums, besides fundamentals, fall within the meter specified AC bandwidth for non-sinusoidal waveforms.

DC VOLTAGE

Range

400.0 mV

4.000 V

40.00 V

400.0 V

600 V

Resolution

100.0 m

1 mV

10 mV

100 mV

1 V

Accuracy

± (0.3% rdg + 4 dgts)

± (0.5% rdg + 3 dgts)

± (0.5% rdg + 3 dgts)

± (0.5% rdg + 3 dgts)

± (1.0% rdg + 4 dgts)

NMRR : >50dB @ 50/60Hz

CMRR : >120dB @ DC, 50/60Hz, Rs = 1k W

Input Impedance : 10M W for 400.0mV range)

AC VOLTAGE (50Hz ~ 500Hz)

Range

4.000 V

40.00 V

400.0 V

600 V

Resolution

1 mV

10 mV

100 mV

1 V

Accuracy

± (1.5% rdg + 5 dgts)

± (1.5% rdg + 5 dgts)

± (1.5% rdg + 5 dgts)

± (2.0% rdg + 5 dgts)

CMRR : >60dB @ DC to 60Hz, Rs = 1k W

Input Impedance : 10M W

-6-

AC CURRENT (Clamp-On)

Range Resolution

50Hz / 60Hz

40.00 A

400.0 A

600 A

10 mA

100 mA

1 A

Accuracy 1)2)3)

± (1.5% rdg + 8 dgts)

1)

Induced error from adjacent current carrying conductor : 0.05/A

2) Specified accuracy is from 1% to 100% of range and for

measurements made at the jaw center. When the conductor is not

positioned at the jaw center, position errors introduced are :

Add 2% to specified accuracy for measurements made BEYOND

jaw marking lines (toward jaw opening)

3) Add 8d to specified accuracy @ reading <10% of range.

OHMS

Range Resolution

400.0 W W

4.000 k W W

40.00 k W W

400.0 k W W

4.000 M W W

40.00 M W W

Accuracy

1)2)3)

± (0.8% rdg + 8 dgts)

± (0.6% rdg + 4 dgts)

± (1.0% rdg + 4 dgts)

± (2.0% rdg + 4 dgts)

Open Circuit Voltage : 0.4VDC typical

MAX HOLD

Specified accuracy ± 50 digits for changes > 25ms in duration.

AUDIBLE CONTINUITY TESTER

DIODE TESTER :

Open Circuit Voltage : <1.6 VDC

Test Current (Typical) : 0.25mA

-7-

CAPACITANCE

Range

1)

500.0 nF

5.000 m

50.00 m

500.0 m

3000 m

Resolution

100 pF

1 nF

10 nF

100 nF

1 m

Accuracy 2)3)

± (3.5% rdg + 6 dgts)

1)

Additional 50.00nF range accuracy is not specified.

2)

Accuracies with film capacitor or better

3) Specified with battery voltage above 2.8V

(approximately half full battery).

Accuracy decreases gradually to 12% at low battery warning

voltage of approximately 2.4V.

Hz FREQUENCY

Function

Sensitivity

(Sine RMS)

400.0 mV

4.000 V

4.000 V

40.00 V

400.0 V

600 V

400.0 A

350 mV

1 V

32 V

100 V

500 V

60 A

Display Counts : 5000

Best resolution : 0.001Hz

Accuracy : 0.5% + 4d

Range

10Hz ~ 2kHz

10Hz ~ 5kHz

10Hz ~ 100kHz

10Hz ~ 10kHz

10Hz ~ 5kHz

40Hz ~ 400Hz

-8-

CAUTION : Before and after hazardous voltage measurements,

test the voltage function on a known source such as line

voltage to determine proper meter functioning.

-9-10-

-11-12-

-13-14-

-15-16-

-17-

MUMBAI

TEST CERTIFICATE

DIGITAL TRMS CLAMPMETER +

MULTIMETER

This Test Certificate warrantees that the product has been inspected and tested in accordance with the published specifications.

The instrument has been calibrated by using equipment which has already been calibrated to standards traceable to national standards.

MODEL NO. KM 111M / KM 112M

SERIAL NO. ___________

DATE: ___________

ISO 9001

REGISTERED

QC

KUSAM-MECO

PASS

-19-

WARRANTY

Each “KUSAM-MECO” product is warranted to be free from defects in material and workmanship under normal use & service. The warranty period is one year (12 months) and begins from the date of despatch of goods. In case any defect occurs in functioning of the instrument, under proper use, within the warranty period, the same will be rectified by us free of charges, provided the to and fro freight charges are borne by you.

This warranty extends only to the original buyer or end-user customer of a

“KUSAM-MECO” authorized dealer.

This warranty does not apply for damaged Ic’s, fuses, burnt PCB’s, disposable batteries, carrying case, test leads, or to any product which in

“KUSAM-MECO’s” opinion, has been misused, altered, neglected, contaminated or damaged by accident or abnormal conditions of operation or handling.

“KUSAM-MECO” authorized dealer shall extend this warranty on new and unused products to end-user customers only but have no authority to extend a greater or different warranty on behalf of “KUSAM-MECO”.

“KUSAM-MECO’s” warranty obligation is limited, at option, free of charge repair, or replacement of a defective product which is returned to a

“KUSAM-MECO” authorized service center within the warranty period.

THIS WARRANTY IS BUYER’S SOLE AND EXCLUSIVE REMEDY AND

IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED,

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.

All transaction are subject to Mumbai Jurisdiction.

-20-