Kusam-meco KM 2777 User manual

VFD-V & VFD-Hz function
Display Hold function
TM
?AutoCheck Voltage & Ohms
?
?5ms CREST-MAX capture mode (Peak Hold)
?Autoranging Relative -Zero mode
?
í
íJaw Opening : 55mm max.
íDisplay : 3-5/6 digits 6000 counts &
3½ digits 1,999 counts for Hz.
íUpdate Rate : 5 per second nominal
íPolarity : Automatic
íLow Battery : Below approx 2.4V
o o
íOperating Temperature : 0 C to 40 C
í
í
Sensing : TRMS sensing
Relative Humidity : Maximum 80% R. H.
o
for temperature upto 31 C decreasing linearly
o
to 50% Relative Humidity at 40 C
o o
Storage Temperature : -20 C to 60 C,
< 80% R.H. (With battery removed)
SPECIAL FEATURES :
GENERAL SPECIFICATIONS :
SAFETY :
An ISO 9001:2008 Company
®
nd
?Double insulation per IEC/EN61010-1 2 Ed.,
nd
UL61010-1 2 Ed., & CAN/CSA C22.2
No.61010.1-0.92 to Category
CAT IV 1000V AC & DC.
?Transient Protection : 12 kV (1.2/50ms surge)
?Overload Protection :
Clamp-on jaws : 2000A rms continuous
“ + ” & COM Terminals (all other functions) :
1000V rms.
Note: All Specification are Subject to change without prior notice.
Contd....2
AC / DC TRMS Clamp-On Multimeter with
VFD, EF-Detection & PC Interface
Model KM 2777 - TRUE RMS SENSING
?EF-Detection (NCV)
?Backlight LCD Display
?Auto Power Off
?Diode Test & Continuity Test
?PC Interface (Optional)
ELECTRICAL SPECIFICATIONS : KM 2777
o o
Accuracy is ± (% readings digits + number of digits) or otherwise specified, at 23 C ± 5 C & less than 75% R.H.
True RMS Model KM 2777 voltage accuracies are specified from 5% to 100% of range or otherwise specified.
Maximum Crest Factor <1.4:1 at full scale & <2.8:1 at half scale, & with frequency components
within the specified frequency bandwidth for non-sinusoidal waveforms.
í
í
í
í
í
í
í
í
í
íOptional Accessories : USB interface kit BRUA-19X,
Altitude : Operating below 2000m
Temperature Coefficient : nominal 0.15 x (specified accuracy) / °C @
o o o o
(0 C--18 C or 28 C--40 C), or otherwise specified
Power supply : Standard 1.5V AAA Battery x 2.
Power Consumption : Typical 14mA for Current function,
& 5.2mA for others.
APO Timing : Idle for 34 minutes
APO Consumption : 10mA typical
Dimension : 264(L) x 97(W) x 43(H) mm
Weight : Approx. 608gm.
Accessories : Test leads (pair), user’s manual, Bkp60 banana plug
K-type Thermocouple x 1 & carrying case.
BKB32 banana
plug to type-K socket plug adaptor
?Pollution degree : 2
?EMC : Meets EN61326-1:2006 (EN55022,EN61000-3-2,EN61000-3-3,
EN61000-4-2, EN61000-4-3, EN61000-4-4,EN61000-4-5,EN61000-4-6,
EN61000-4-8,EN61000-4-11)
In an RF field of 3V/m :
Capacitance function is not specified
Other function ranges : Total Accuracy = Specified Accuracy + 200 digits
Performance above 3V/m is not specified.
ACA CURRENT(Clamp on)
1)
Accuracy
Resolution
Range
True RMS Crest Factor :
< 1.4:1 at full scale & <2.8:1 at half scale
1)Induced error from adjacent current carrying conductor :
<0.1A/A
±(2.0%rdg + 5dgts)
50Hz – 60Hz
200.0 A
0 ~ 500 A
500~2000 A
±(2.5%rdg + 5dgts)
±(3.0%rdg + 5dgts)
±(2.5%rdg + 5dgts)
40Hz~50Hz & 60Hz~400Hz
200.0 A
0 ~ 500 A
500~1000 A
±(3.0%rdg + 5dgts)
±(3.5%rdg + 5dgts)
1000~2000 A Unspecified
DCA CURRENT(Clamp on)
1)2)
Accuracy
Resolution
Range
1 )Induced error from adjacent current carrying conductor :
<0.1A/A
2 )Specified with Relative Zero mode applied to offset the
non-zero residual readings, if any.
?
±(2.0%rdg + 5dgts)
200.0 A
0 ~ 500 A
500~2000 A
±(2.0%rdg + 5dgts)
±(2.5%rdg + 5dgts)
DC + ACA CURRENT(Clamp on)
1)2)
Accuracy
Resolution
Range
True RMS Crest Factor :
< 1.4:1 at full scale & <2.8:1 at half scale
1)Induced error from adjacent current carrying conductor :
<0.1A/A
2 )Specified with Relative Zero mode applied to offset the
non-zero residual readings, if any.
?
DC, 50Hz ~ 60Hz
200.0 A
2000 A
±(3.0%rdg + 8dgts)
40Hz ~ 50Hz & 60Hz ~ 400Hz
200.0 A
0 ~ 1000 A
1000~2000 A
±(3.5%rdg + 8dgts)
Unspecified
Preliminary Data
D:\Chhaya\My Documents\Chhaya\backup\catlog\New cat\KM 2776-KM 2777.cdr
100 mA
1 A
1 A
100 mA
1 A
1 A
1 A
100 mA
1 A
1 A
100 mA
1 A
100 mA
1 A
1 A

Note: All Specification are Subject to change without prior notice.
G-17, Bharat Industrial Estate, T. J. Road, Sewree (W), Mumbai - 400 015. INDIA.
Sales Direct : 022 - 24156638. Tel.: [phone] Fax : 022 - 24149659
Email : [email protected], Website : www.kusamelectrical.com, www.kusam-meco.co.in
ELECTRICAL SPECIFICATIONS : KM 2777
NON-CONTACT EF-DETECTION
Typical Voltage
20V (tolerance : 10V ~ 36V)
55V (tolerance : 23V ~ 85V)
110V (tolerance : 59V ~ 600V)
Bar-Graph
Indication
-
- - -
- - - - -
Indication : Bar-graph segments & audible beep
tones proportional to the field strength
Detection Frequency : 50/60Hz
Detection Antenna : Top side of the stationary jaw
Probe-Contact EF-Detection: For more precise
indication of live wires, such as distinguishing
between live and ground connections, use the
Red (+) test probe for direct contact measurement.
An ISO 9001:2008 Company
®
TM
OHM & AUTOCHECK _OHM1)
600.0 W
±(0.5%rdg + 5dgts)
6.000 KW
60.00 KW
600.0 KW
6.000 MW
Open Circuit Voltage : 0.45VDC typical.
1) TM
AutoCheck OhmThreshold : <10.00MWnominal.
±(0.8%rdg + 5dgts)
±(1.2%rdg + 5dgts)
Accuracy
Resolution
Range
40.00 MW±(2.3%rdg + 5dgts)
0.1 W
1 W
10 W
100 W
1 KW
10 KW
DIODE TESTER
Range Test Current
(Typical)
1.000V 0.56mA <1.8V DC typical
Open Circuit
Voltage
Accuracy : 1.0% + 3d
CREST-MAX CAPTURE MODE
Accuracy :
Specified accuracy plus 250 digits for changes
> 5ms in duration
AUDIBLE CONTINUITY TESTER
between 10Wand 200W
32ms approx.
Audible Threshold Response Time
TM
AUTOCHECK _DCV
Accuracy
Resolution
Range
TM
AutoCheck Lo-Z DCV Threshold : >+1.5VDC &
<-1.5VDC nominal.
TM
AutoCheck Lo-Z DCV input impedance :
Initially approx. 2.5kW, 600pF nominal;
impedance increases abruptly within a fraction of a
second as display voltage is above 50V (typical).
Ended up impedances vs display voltages typically are :
10 kW@ 100V
60 kW@ 300V
200kW@ 600V
420kW@ 1000V
6.000 V
±(1.3%rdg + 5dgts)
60.00 V
600.0 V
1000 V
1 mV
10 mV
100 mV
1 V
CAPACITANCE
60.00 nF
±(2.0%rdg + 5dgts)
600.0 nF
6.000 mF
60.00 mF±(3.5%rdg + 5dgts)2)
Resolution
Range
±(4.0%rdg + 5dgts)2)
1)
Accuracy
600.0 mF
2000 mF
1) Accuracies with film capacitor or better
2) Temperature Coefficient : 0.25 x (specified accuracy) / °C
@ (0°C ~ 18°C or 28°C ~ 40°C)
10 pF
100 pF
1 nF
10 nF
100 nF
1 mF
6.000 V
±(1.5%rdg + 5dgts)
60.00 V
600.0 V
1000 V
1)
Accuracy
Resolution
Range
50Hz ~ 60Hz
1 mV
10 mV
100 mV
1 V
TM
AUTOCHECK _ACV
TM
AutoCheck Lo-Z ACV Threshold : >1.5V (50/60Hz) nominal.
TM
AutoCheck Lo-Z ACV input impedance :
Initially approx. 2.5kW, 600pF nominal; impedance increases
abruptly within a fraction of a second as display voltage is
above 50V (typical). Ended up impedances vs display
voltages typically are :
10 kW@ 100V
60 kW@ 300V
200kW@ 600V
420kW@ 1000V
VFD_ ACV (with Low Pass Filter)
6.000 V
±(4%rdg + 80dgts)
60.00 V
600.0 V
1000 V
1)
Accuracy
Resolution
Range
10Hz ~ 20Hz
20Hz ~ 200Hz
2)
200Hz~420Hz
±(2%rdg + 60dgts)
6.000 V
60.00 V
600.0 V
1000 V
±(7%rdg + 80dgts)
6.000 V
60.00 V
600.0 V
1000 V
1) Not specified for fundamental frequency > 400Hz
3) Accuracy linearly decreases from 2% + 50d @ 200Hz to
7% + 80d @ 400Hz
1 mV
10 mV
100 mV
1 V
1 mV
10 mV
100 mV
1 V
1 mV
10 mV
100 mV
1 V
TEMPERATURE
Accuracy
Resolution
K-type Thermocouple range & accuracy not included
±(0.3%rdg + 4dgts)
-50°C ~ 1000°C
±(0.3%rdg + 6dgts)
Range
-58°F ~ 1832°F
~Hz LINE LEVEL FREQUENCY
Accuracy : 0.1% + 4d
1)VFD sensitivity linearly decreases from 10% F.S. @ 200Hz
to 40% F.S. @ 400Hz
Function
6 V
60 V
600 V
Sensitivity
(Sine RMS)
2 V
20 V
100 V
600 V
10 A
Range
40Hz ~ 1999Hz
40Hz ~ 1999Hz
40Hz ~ 1999Hz
20Hz ~ 400Hz
VFD 6 V1) 1 V ~ 2 V
6 V ~ 20 V
60 V ~ 200 V
VFD 60 V1)
VFD 600 V1)
10Hz ~ 400Hz
10Hz ~ 400Hz
10Hz ~ 400Hz
40Hz ~ 1999Hz
1000 V
200 A
2000 A 40 A 20Hz ~ 400Hz
Contd....2
AC VOLTAGE
Accuracy
Resolution
Range
50Hz ~ 400Hz
6.000 V
60.00 V
600.0 V
1000 V
±(1.2%rdg + 5dgts)
Input Impedance : 10MW, 50pF nominal
1 mV
10 mV
100 mV
1 V
DC VOLTAGE
6.000 V
±(0.5%rdg + 5dgts)
60.00 V
600.0 V
1000 V
Input Impedance : 10MW, 50pF nominal
Accuracy
Resolution
Range
1 mV
10 mV
100 mV
1 V
AC + DC VOLTAGE
Accuracy
Resolution
Range
6.000 V
±(1.4%rdg + 7dgts)
60.00 V
600.0 V
1000 V
Input Impedance : 10MW, 50pF nominal
1 mV
10 mV
100 mV
1 V
DC, 50Hz ~400Hz
1°C
1°F
D:\Chhaya\My Documents\Chhaya\backup\catlog\New cat\KM 2777.cdr

DC AC TRUE RMS
DC
of the waveform, and is given by the expression :
AC True RMS is a term which identifies a DMM that responds accurately to the total effective RMS value regardless
DC +
DC + AC True RMS voltage measurement, you can accurately measure the voltage values regardless of the waveforms
such as: square, sawtooth, triangle, pulse trains, spikes, as well as distorted waveforms with the presence of harmonics
and DC components / Harmonics and DC components may cause:
AC True RMS voltage is the total effective voltage having the same heating value corresponding a DC voltage. With
1) Overheated transformers, generators and motors to burn out faster than their rated life
2) Circuit breakers to trip prematurely
3) Fuses to blow
4) Neutrals to overheat due to triplen harmonics present on the neutral (180Hz)
5) Bus bars and electrical panels to vibrate
OnlyACor True RMS andAverage responding meters can introduce significant errors in many applications.
See TABLE 2 for typical example.
WHAT IS DC + AC TRUE RMS
®
INPUT WAVEFORM DC + AC TRMS AC RMS AVERAGE RESPONSE
Sine 1.414V
0V
1.414V
0V
Half wave rectified Sine
Full wave rectified Sine
1.414V
0V
1.414V
0V
50% duty pulse train
1.000V
ERROR=
0%
CF=1.414
1.000V
ERROR=
0%
CF=1.414
1.000V
ERROR=
0%
1.000V
ERROR=
0%
CF=1.414
0.436V
ERROR=
56.4%
CF=3.247
0.421V
ERROR=
57.9%
0.707V
ERROR=
0%
CF=2.000
0.546V
ERROR=
22.7%
CF=2.591
0.550V
ERROR=
22.2%
1.000V
ERROR=
0%
CF=1.414
0.707V
ERROR=
29.3%
CF=2.000
0.785V
ERROR=
21.5%
TABLE 2. WAVEFORMS AND CREST FACTORS

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.
USE TRUE RMS WHEN MEASURING
AC WAVEFORMS
®
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 Actual
Pk-Pk True RMS Reading Average Reading Reading Error
Sine Wave
Triangle Wave
Pulse (25% duty Cycle)
Pulse (6.25% duty Cycle)
Square Wave
Pulse (12.5% duty Cycle)
2.000 0.707 0.707 0%
2.000 0.577 0.555 -3.8%
2.000 1.000 1.111 +11.1%
2.000 0.433 0.416 -3.8%
2.000 0.331 0.243 -26.5%
2.000 0.242 0.130 -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
Sine Wave
Pulse (12.5% duty Cycle)
1.000
1.000
1.414
1.732
Square Wave
Triangle Wave
Pulse (25% duty Cycle)
Pulse (6.25% duty Cycle)
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

MODEL - KM 2777
OPERATION MANUAL
AN ISO 9001:2008 COMPANY
®®
17, Bharat Industrial Estate, T. J. Road, Sewree (W),
Mumbai-400015. INDIA
Sales Direct: [phone] Tel.:[phone]
Fax: [phone] E-mail : [email protected],
Website : www.kusamelectrical.com; www.kusam-meco.co.in
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
®®
AC / DC Clamp-On
Multimeter with
VFD, EF-Detection &
PC Interface

AC / DC TRMS Clamp-On Multimeter
with VFD, EF-Detection &
PC Interface
MODEL - KM 2777

SAFETY................................................................................01
TERMS IN THIS MANUAL...................................................02
INTERNATIONAL ELECTRICAL SYMBOL..........................03
FEATURES & GENERAL SPECIFICATION.........................04
ELECTRICAL SPECIFICATION...........................................06
PRODUCT DESCRIPTION .................................................14
OPERATION.........................................................................15
MAINTENANCE...................................................................27
TEST CERTIFICATE............................................................28
WARRANTY......................................................................... 29
TABLE OF CONTENTS
TITLE PAGE NO.
1)
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.
Measurement Category IV 1000V AC & DC.
OVERVOLTAGE CATEGORY ll (CAT II) is for equipment
intended to be supplied from the building wiring. It applies both to
plug- c o nnect e d e q u ipment an d to PER M A NENTLY
CONNECTED EQUIPMENT.
The meter protection rating, against the users, is double
insulation per IEC/EN61010-1 2nd Ed., UL61010-1 2nd Ed.,
CAN/CSA C22.2 No. 61010.1-0.92, IEC/EN61010-2-032,
UL61010B-2-032, CAN/CSA C22.2 No. 61010-2-032-04 &
IEC/EN61010-031:2002/A1:2008:
OVERVOLTAGE CATEGORY lV (CAT IV) is for equipment
installed at or near the origin of the electrical supply to a building,
between the building entrance and the main distribution board.
Such equipment may include electricity tariff meters and primary
overcurrent protection devices.
Per IEC61010-1 (2010) OVERVOLTAGE CATEGORY
OVERVOLTAGE CATEGORY lll (CAT III) is for equipment
intended to form part of a building wiring installation. Such
equipment includes socket outlets, fuse panels, and some
MAINS installation control equipment.
- 01 -

To reduce the risk of fire or electric shock, do not expose this product
to rain or moisture. The meter is intended only for indoor use.
To avoid electrical shock hazard, observe the proper safety
precautions when working with voltages above 60 VDC or
30VAC rms. These voltage levels pose a potential shock hazard to
the user. Before & after hazardous voltage measurements, test the
voltage function on a known source such as line voltage to determine
proper meter functioning.
Identifies conditions and actions that could result
in serious injury or even death to the user.
Identifies conditions and actions that could cause
damage or malfunction in the instrument.
Keep your hands/fingers behind the hand/finger barriers (of the
meter and the test leads) that indicate the limits of safe access of
the hand-held part during measurement. Inspect test leads,
connectors, and probes for damaged insulation or exposed metal
before using the instrument. If any defects are found, replace them
immediately. Only use the test lead provided with the equipment or
UL Listed Probe Assembly rated CAT IV 1000V or better.
Disconnect the test leads from the test points
before changing meter functions.
This Clamp-on meter is designed to apply around or remove from
uninsulated hazardous live conductors. But still, individual protective
equipment must be used if hazardous live parts in the installation
where measurement is to be carried out could be accessible.
- 02 -
The instruments conform to CENELEC Low-Voltage directive
2006/95/EC and Electromagnetic compatibility directive
2004/108/EC.
Caution ! Refer to the explanation in this Manual
Caution ! Risk of electric shock
Earth (Ground)
Double Insulation or Reinforced insulation
Fuse
AC--Alternating Current
DC--Direct Current
Application around and removal from hazardous live
conductors is permitted
2) CENELEC Directives
INTERNATIONAL ELECTRICAL SYMBOLS
- 03 -

3) SPECIFICATIONS :
GENERAL SPECIFICATIONS :
SPECIAL FEATURES:
—
— VFD-V & VFD-Hz function
—
—
— Display Hold function
—
—
—
—
—
TM
AutoCheck Voltage & Ohms
5ms CREST-MAX capture mode (Peak Hold)
Autoranging Relative -Zero mode
EF-Detection (NCV)
Backlight LCD Display
Auto Power Off
Diode Test & Continuity Test
PC Interface (Optional)
í
íJaw Opening : 55mm max.
íDisplay : 3-5/6 digits 6000 counts & 3½ digits 1,999 counts for Hz.
íUpdate Rate : 5 per second nominal
íPolarity : Automatic
íLow Battery : Below approx 2.4V
o o
íOperating Temperature : 0 C to 40 C
í
í
í
í
Sensing : TRMS sensing
Relative Humidity : Maximum 80% R. H. for temperature upto
o o
31 C decreasing linearly to 50% Relative Humidity at 40 C
o o
Storage Temperature : -20 C to 60 C, < 80% R.H.
(With battery removed)
Altitude : Operating below 2000m
Temperature Coefficient : nominal 0.15 x (specified accuracy) /
o o o o
°C @ (0 C--18 C or 28 C--40 C), or otherwise specified
- 04 -
Power supply : Standard 1.5V AAA Battery x 2.
Power Consumption : Typical 14mA for Current function,
& 5.2mA for others.
APO Timing : Idle for 34 minutes
APO Consumption : 10mA typical
Dimension : 264(L) x 97(W) x 43(H) mm
Weight : Approx. 608gm.
Accessories : Test leads (pair), user’s manual, Bkp60 banana
plug K-type Thermocouple x 1 & carrying case.
BKB32 banana plug to type-K socket plug adaptor
í
í
í
í
í
í
í
íOptional Accessories : USB interface kit BRUA-19X,
SAFETY :
—
—
—
—
—
nd nd
Double insulation per IEC/EN61010-1 2 Ed., UL61010-1 2 Ed.,
& CAN/CSA C22.2 No.61010.1-0.92 to Category
CAT IV 1000V AC & DC.
Transient Protection : 12 kV (1.2/50ms surge)
Overload Protection :
Clamp-on jaws : 2000A rms continuous
“ + ” & COM Terminals (all other functions) : 1000V rms.
Pollution degree : 2
EMC : Meets EN61326-1:2006 (EN55022,EN61000-3-2,
EN61000-3-3, EN61000-4-2, EN61000-4-3, EN61000-4-4,
EN61000-4-5,EN61000-4-6, EN61000-4-8,EN61000-4-11)
In an RF field of 3V/m :
Capacitance function is not specified
Other function ranges : Total Accuracy =
Specified Accuracy + 200 digits
Performance above 3V/m is not specified.
- 05 -

True RMS Model KM 2777 voltage accuracies are specified from
5% to 100% of range or otherwise specified. Maximum Crest
Factor <1.4:1 at full scale & <2.8:1 at half scale, & with frequency
components within the specified frequency bandwidth for non-
sinusoidal waveforms.
ELECTRICAL SPECIFICATIONS :
Accuracy is ± (% readings digits + number of digits) or otherwise
o o
specified, at 23 C ± 5 C & less than 75% R.H.
ACA CURRENT(Clamp on)
1)
Accuracy
Resolution
Range
True RMS Crest Factor :
< 1.4:1 at full scale & <2.8:1 at half scale
1)Induced error from adjacent current carrying conductor :
<0.1A/A
±(2.0%rdg + 5dgts)
50Hz – 60Hz
200.0 A
0 ~ 500 A
500~2000 A
±(2.5%rdg + 5dgts)
±(3.0%rdg + 5dgts)
±(2.5%rdg + 5dgts)
40Hz~50Hz & 60Hz~400Hz
200.0 A
0 ~ 500 A
500~1000 A
±(3.0%rdg + 5dgts)
±(3.5%rdg + 5dgts)
1000~2000 A Unspecified
100 mA
1 A
1 A
100 mA
1 A
1 A
1 A
- 06 -
DC + ACA CURRENT(Clamp on)
1)2)
Accuracy
Resolution
Range
True RMS Crest Factor :
< 1.4:1 at full scale & <2.8:1 at half scale
1)Induced error from adjacent current carrying conductor :
<0.1A/A
2 )Specified with Relative Zero mode applied to offset the
non-zero residual readings, if any.
D
DC, 50Hz ~ 60Hz
200.0 A
2000 A
±(3.0%rdg + 8dgts)
40Hz ~ 50Hz & 60Hz ~ 400Hz
200.0 A
0 ~ 1000 A
1000~2000 A
±(3.5%rdg + 8dgts)
Unspecified
100 mA
1 A
100 mA
1 A
1 A
DCA CURRENT(Clamp on)
1)2)
Accuracy
Resolution
Range
1 )Induced error from adjacent current carrying conductor :
<0.1A/A
2 )Specified with Relative Zero mode applied to offset the
non-zero residual readings, if any.
D
±(2.0%rdg + 5dgts)
200.0 A
0 ~ 500 A
500~2000 A
±(2.0%rdg + 5dgts)
±(2.5%rdg + 5dgts)
100 mA
1 A
1 A
- 07 -

AC + DC VOLTAGE
Accuracy
Resolution
Range
6.000 V
±(1.4%rdg + 7dgts)
60.00 V
600.0 V
1000 V
Input Impedance : 10MW, 50pF nominal
1 mV
10 mV
100 mV
1 V
DC, 50Hz ~400Hz
DC VOLTAGE
6.000 V
±(0.5%rdg + 5dgts)
60.00 V
600.0 V
1000 V
Input Impedance : 10MW, 50pF nominal
Accuracy
Resolution
Range
1 mV
10 mV
100 mV
1 V
AC VOLTAGE
Accuracy
Resolution
Range
50Hz ~ 400Hz
6.000 V
60.00 V
600.0 V
1000 V
±(1.2%rdg + 5dgts)
Input Impedance : 10MW, 50pF nominal
1 mV
10 mV
100 mV
1 V
- 08 -
VFD_ ACV (with Low Pass Filter)
6.000 V
±(4%rdg + 80dgts)
60.00 V
600.0 V
1000 V
1)
Accuracy
Resolution
Range
10Hz ~ 20Hz
20Hz ~ 200Hz
2)
200Hz~420Hz
±(2%rdg + 60dgts)
6.000 V
60.00 V
600.0 V
1000 V
±(7%rdg + 80dgts)
6.000 V
60.00 V
600.0 V
1000 V
1) Not specified for fundamental frequency > 400Hz
3) Accuracy linearly decreases from 2% + 50d @ 200Hz to
7% + 80d @ 400Hz
1 mV
10 mV
100 mV
1 V
1 mV
10 mV
100 mV
1 V
1 mV
10 mV
100 mV
1 V
CREST-MAX CAPTURE MODE
Accuracy :
Specified accuracy plus 250 digits for changes
> 5ms in duration
- 09 -

- 10 -
NON-CONTACT EF-DETECTION
Typical Voltage
20V (tolerance : 10V ~ 36V)
55V (tolerance : 23V ~ 85V)
110V (tolerance : 59V ~ 600V)
Bar-Graph
Indication
-
- - -
- - - - -
Indication : Bar-graph segments & audible beep
tones proportional to the field strength
Detection Frequency : 50/60Hz
Detection Antenna : Top side of the stationary jaw
Probe-Contact EF-Detection: For more precise
indication of live wires, such as distinguishing
between live and ground connections, use the
Red (+) test probe for direct contact measurement.
CAPACITANCE
60.00 nF
±(2.0%rdg + 5dgts)
600.0 nF
6.000 mF
60.00 mF±(3.5%rdg + 5dgts)2)
Resolution
Range
±(4.0%rdg + 5dgts)2)
1)
Accuracy
600.0 mF
2000 mF
1) Accuracies with film capacitor or better
2) Temperature Coefficient : 0.25 x (specified accuracy) / °C
@ (0°C ~ 18°C or 28°C ~ 40°C)
10 pF
100 pF
1 nF
10 nF
100 nF
1 mF
- 11 -
TM
AUTOCHECK _DCV
Accuracy
Resolution
Range
TM
AutoCheck Lo-Z DCV Threshold : >+1.5VDC & <-1.5VDC nominal.
TM
AutoCheck Lo-Z DCV input impedance :
Initially approx. 2.5kW, 600pF nominal; impedance increases abruptly within a
fraction of a second as display voltage is above 50V (typical).
Ended up impedances vs display voltages typically are :
10 kW @ 100V
60 kW @ 300V
200kW @ 600V
420kW @ 1000V
6.000 V
±(1.3%rdg + 5dgts)
60.00 V
600.0 V
1000 V
1 mV
10 mV
100 mV
1 V
TM
OHM & AUTOCHECK _OHM1)
600.0 W
±(0.5%rdg + 5dgts)
6.000 KW
60.00 KW
600.0 KW
6.000 MW
Open Circuit Voltage : 0.45VDC typical.
1) TM
AutoCheck OhmThreshold : <10.00MW nominal.
±(0.8%rdg + 5dgts)
±(1.2%rdg + 5dgts)
Accuracy
Resolution
Range
40.00 MW±(2.3%rdg + 5dgts)
0.1 W
1 W
10 W
100 W
1 KW
10 KW

- 12 -
~Hz LINE LEVEL FREQUENCY
Accuracy : 0.1% + 4d
1)VFD sensitivity linearly decreases from 10% F.S. @ 200Hz
to 40% F.S. @ 400Hz
Function
6 V
60 V
600 V
Sensitivity
(Sine RMS)
2 V
20 V
100 V
600 V
10 A
Range
40Hz ~ 1999Hz
40Hz ~ 1999Hz
40Hz ~ 1999Hz
20Hz ~ 400Hz
VFD 6 V1) 1 V ~ 2 V
6 V ~ 20 V
60 V ~ 200 V
VFD 60 V1)
VFD 600 V1)
10Hz ~ 400Hz
10Hz ~ 400Hz
10Hz ~ 400Hz
40Hz ~ 1999Hz
1000 V
200 A
2000 A 40 A 20Hz ~ 400Hz
DIODE TESTER
Range Test Current
(Typical)
1.000V 0.56mA <1.8V DC typical
Open Circuit
Voltage
Accuracy : 1.0% + 3d
- 13 -
6.000 V
±(1.5%rdg + 5dgts)
60.00 V
600.0 V
1000 V
1)
Accuracy
Resolution
Range
50Hz ~ 60Hz
1 mV
10 mV
100 mV
1 V
TM
AUTOCHECK _ACV
TM
AutoCheck Lo-Z ACV Threshold : >1.5V (50/60Hz) nominal.
TM
AutoCheck Lo-Z ACV input impedance :
Initially approx. 2.5kW, 600pF nominal; impedance increases
abruptly within a fraction of a second as display voltage is
above 50V (typical). Ended up impedances vs display
voltages typically are :
10 kW @ 100V
60 kW @ 300V
200kW @ 600V
420kW @ 1000V
TEMPERATURE
Accuracy
Resolution
K-type Thermocouple range & accuracy not included
±(0.3%rdg + 4dgts)
-50°C ~ 1000°C
±(0.3%rdg + 6dgts)
Range
-58°F ~ 1832°F
1°C
1°F
AUDIBLE CONTINUITY TESTER
between 10W and 200W32ms approx.
Audible Threshold Response Time

1
10
9
2
3
4
4
56
7
8
- 14 -
PRODUCT DESCRIPTION 1) Antenna for Non-Contact
EF-Detection
2) Hand/Finger Barrier to
indicate the limits of safe
access of the meter
during measurement
3) Rotary-switch Selector to
turn the power ON/OFF
and Select a function
4) Push-buttons for special
functions & features.
5) Input Jack for all functions
EXCEPT non-invasive
DCA & ACA current
functions
6) Common (Ground refer-
ence) Input Jack for all
functions EXCEPT non-
invasive DCA & ACA
current functions
7) 3-5/6 digits 6000 counts
& 3-1/2 digits 2000 counts
dual numeric LCD display
10) Hall-effect Clamp Jaw for AC & DC current magnetic field pick up.
9) Jaw center (& DCA polarity) Indicator, at where best DCA & ACA
accuracy is specified
8) Jaw trigger for opening the clamp jaw
- 15 -
TM
This innovative AutoCheck feature automatically selects
Hz
measurement function of ACV , DCV, or Resistance () based on
the input via test leads.
CAUTION : Before and after hazardous voltage measurements, test
the voltage function on a known source such as line voltage to
determine proper meter functioning.
OPERATION
TM
AutoCheck mode
● With no input, the meter displays “Auto” when it is ready.
● With no voltage signal but a resistance below 10M (nominal) is
present, the meter displays the resistance value. When the
resistance is below the “Audible Threshold”, the meter further gives
a continuity beep tone.
● When a signal above the voltage threshold of 1.5V DC or AC up to
the rated 1000V is present, the meter displays the voltage value in
appropriate DCV or ACV, whichever larger in peak magnitude.
LoZ
LoZ
8.8.8.8
V
AUTO
6.003
W
AUTO
k
LoZ
LoZ
Auto
V W
LoZ
LoZ
248.8
AV
1208
Hz
AUTO

- 16 -
Note:
*Range-Lock and Function-Lock Feature: When a measurement
TM
reading is being displayed in AutoCheck mode, press the
RANGE or SELECT button momentarily 1 time can lock the range
or function it was in. Press the button momentarily repeatedly to
step through the ranges or functions.
*As Hazardous-Alert : When making resistance measurements in
TM
AutoCheck mode, an unexpected display of voltage readings
alerts you that the object under test is being energized.
*Ghost - voltage Buster : Ghost - voltages are unwanted stray
signals coupled from adjacent hard signals, which confuse
TM
common multimeter voltage measurements. Our AutoCheck
mode provides low (ramp-up) input impedance (approx. 2.5kΩ at
low voltage) to drain ghost voltages leaving mainly hard signal
values on meter readings. It is an invaluable feature for precise
indication of hard signals, such as distinguishing between hot and
open wires (to ground) in electrical installation applications.
TM
AutoCheck mode input impedance increases abruptly from initial
2.5kΩ to a few hundred kΩ's on high voltage hard signals. “LoZ”
displays on the LCD to remind the users of being in such low
impedance mode. Peak initial load current, while probing 1000VAC
for example, can be up to 566mA (1000V x 1.414 / 2.5kΩ),
decreasing abruptly to approx. 3.37mA (1000V x 1.414 / 420kΩ)
TM
within a fraction of a second. Do not use AutoCheck mode on
circuits that could be damaged by such low input impedance.
Instead, use rotary-switch selector or high input impedance
voltage modes to minimize loading for such circuits.
WARNING:
- 17 -
Hz Hz
VFD-ACV & ACV functions
Inputs are made through the test leads terminals.
Hz
VFD-ACV function is to deal with VFD (Variable Frequency Device)
signals. It, however, further pre-selects the most appropriate voltage-
ranges and thus the Hz trigger levels to best cope with most VFD-
Voltage and VFD-Frequency applications.
Note: The Hz trigger level is determined by the AC/DC+AC Voltage
or Current function-range being in use. Press RANGE button to
select different function-ranges and thus trigger levels manually.
Inputs are made
through the test
leads terminals.
Defaults at DCV
Function.
Press SELECT
button momentarily
and release to select
Hz
DC+ACV .
Hz
DCV & DC+ACV
functions
VFD
220.8
V
60.8
Hz
AUTO
VFD
VFD
V
Hz
268.2
V
1002
Hz
AUTO
V
Hz

- 18 -
Hz Hz
ACA , DCA & DC+ACA
(Model KM 2777) functions
Input is made through the clamp
jaws for non-invasive current
Hz
measurements. Defaults at ACA
function. Press SELECT button
momentarily & release to select the
subject functions in sequence.
1206
AUTO
A
50.0
Hz
A
±
Hz
4.503
V
AUTO
V
±
108.3
V
60.3
Hz
AUTO
SELECT
1
- 19 -
For non-invasive current measurements, press the jaw trigger and
clamp the jaws around conductor(s) of only one single pole of a
circuit for load current measurement. Make sure the jaws are
completely closed, or else it will introduce measurement errors.
Enclosing conductor(s) of more than one pole of a circuit may result
in differential current (like identifying leakage current)
measurement. Locate the conductor(s) at the Jaws center as much
as possible to get the best measuring accuracy. For removal, press
the jaw trigger and remove the jaws from the conductor(s).
CAUTION (Application and removal of the Clamp-on meter)
1338
AUTO
SELECT
1
A
~
501
Hz
580.2
AUTO
SELECT
I
1
A

- 20 -
Adjacent current-carrying devices such as transformers, motors
and conductor wires will affect measurement accuracy. Keep the
jaws away from them as much as possible to minimize influence.
W Resistance & Continuity Functions
Inputs are made through the test leads terminals. Defaults at
W RESISTANCE. Press SELECT button momentarily and release to
select. Continuity.
Capacitance & Diode functions
Inputs are made through the test lead terminals. Defaults at
Capacitance. Press SELECT button momentarily and release to
select Diode.
When using Diode test function, normal forward voltage drop
(forward biased) for a good silicon diode is between 0.400V to
0.900V. A reading higher than that indicates a leaky diode
(defective). A zero reading indicates a shorted diode (defective). An
OL indicates an open diode (defective). Reverse the test leads
connections (reverse biased) across the diode. The digital display
shows OL if the diode is good. Any other readings indicate the diode
is resistive or shorted (defective).
Note
1. Using Resistance, Continuity, Diode or Capacitance function in a
live circuit will produce false results and may damage the meter. In
many cases the suspected component (s) must be disconnected
from the circuit to obtain an accurate measurement reading.
CAUTION
2. When using Capacitance function, discharge capacitor(s) before
making any measurements. Large value capacitors should be
discharged through an appropriate resistance load
- 21 -
000.8
W
1
SELECT
W
3.086
k
W
0.600
1
SELECT
3.028
f
AUTO
mF
nF
V

- 22 -
Temperature Function
o
Defaults at C (Celsius) readings. Press SELECT button momentarily
o
and release to select F (Fahrenheit) readings. Inputs are made
through the test leads terminals. Be sure to insert the banana plug
type-K temperature bead probe Bkp60 with correct ± polarities. You
can also use a plug adapter bkb32 (optional purchase) with banana
pins to type-k socket to adapt other type-k standard mini plug
temperature probes.
°F
°C
1
SELECT
- 23 -
In Voltage or Current
function, press the EF
button for one second or
more and release to toggle
to EF-Detection feature.
The meter displays “E.F.”
when it is ready. Signal
strength is indicated as a
s e r i e s o f b a r - g r a p h
segments on the display
together with variable
beep tones.
Electric Field EF-Detection
1
EF
EF
Live Ground
Live Ground
EF

- 25 -
Press the SELECT button for 1 second or more to toggle the LCD
backlight. The backlight will also be turned off automatically after
32 seconds to extend battery life.
Relative-Zero (∆) mode
Backlighted LCD display (Model KM 2777)
Relative-Zero allows the user to offset the meter consecutive
measurements with the main display displaying reading as the
reference value. Press the REL button momentarily and release to
toggle Relative-Zero mode.
Press the RANGE button momentarily and release to select manual-
ranging, and the meter will remain in the range it was in, the LCD
AUTO turns off. Press the button again to step through the ranges.
Press and hold the button for 1 second or more and release to
resume auto-ranging.
Manual or Auto-ranging
Note: manual-ranging feature is not available in Hz and function
ranges.
Press the RANGE button while turning the meter on to temporarily
disable the Beeper feature. Turn the rotary switch OFF and then
back on to resume.
Set Beeper Off
- 24 -
●Non-Contact EF-Detection: An antenna is located along the top-
right end of the clamp jaw, which detects electric field surrounds
energized conductors. It is ideal for tracing live wiring connections,
locating wiring breakage and to distinguish between live or earth
connections.
●Probe-Contact EF-Detection: For more precise indication of live
wires, such as distinguishing between live and ground connections,
use the Red (+) test probe for direct contact measurements.
The instrument equips with an optical isolated interface port at the
meter back for data communication. Optional purchase PC
interface kit BRUA-19X is required to connect the meter to the PC
computer RS232 or USB ports. Press and hold the HOLD button
while turning the meter on to enable meter PC-COMM output.
The hold feature freezes the display for later view. Press the HOLD
button momentarily and release to toggle the hold feature.
PC computer interface capabilities
Hold
Press CREST (HOLD) button for one second or more and release
to activate CREST-MAX capture (Instantaneous Peak-Hold) mode
to capture signal peak of voltage or current in duration as short as
5ms. The LCD “C” & “MAX” turn on. Press again the button
momentarily and release can toggle the combination use of HOLD
feature. Press the button for 1 second or more and release to exit
CREST-MAX capture mode. Auto-ranging and Auto-Power-Off are
disabled automatically in this mode.
5ms CREST-MAX capture mode

- 26 -
Press and hold the SELECT button while turning the meter on to
temporarily disable the Auto-Power-Off (APO) feature. Turn the
rotary switch OFF and then back on to resume.
Auto-Power-Off (APO)
The Auto-Power-Off (APO) mode turns the meter off automatically
to extend battery life after approximately 34 minutes of no rotary
switch or push button operations. To wake up the meter from APO,
press the SELECT button momentarily and release or turn the
rotary switch OFF and then back on. Always turn the rotary switch
to the OFF position when the meter is not in use.
Disabling Auto-Power-Off
MAINTENANCE
To avoid electrical shock, disconnect the meter from any circuit,
remove the test leads from the input jacks and turn OFF the meter
before opening the case. Do not operate with open case.
WARNING
If the instrument fails to operate, check batteries and test leads
etc., and replace as necessary. Double check operating procedure
as described in this user's manual.
Trouble Shooting
If the instrument voltage-resistance input terminal has subjected to
high voltage transient (caused by lightning or switching surge to
the system under test) by accident or abnormal conditions of
operation, the protective impedance components in series might be
The meter uses standard 1.5V AA Size (IEC LR6) battery X 2
Loosen the 2 captive screws from the battery cover case. Lift the
battery cover case. Replace the batteries. Replace battery cover
case. Re-fasten the screws.
Battery Replacement
Periodically wipe the case with a damp cloth and mild detergent; do
not use abrasives or solvents. If the meter is not to be used for
periods of longer than 60 days, remove the batteries and store them
separately.
Cleaning and Storage
- 27 -
blown off (become high impedance) like fuses to protect the user
and the instrument. Most measuring functions through this terminal
will then be open circuit.