Kusam-meco KM 088 User manual

All Specifications are subject to change without prior notice.
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?Auto-ranging
TM
AmpTip low-current range calibrated at Jaw-tip for slim-conditions
MAX/MIN/AVG Recording mode (Auto ranging)
VFD-V & Hz for fundamental V/Hz of most Variable-Frequency-Drives
Display Hold & Non-Contact EF-Detection (NCV)
Back-lighted easy-to-read LCD display
Flashlight for easy operation in dim areas
Fast 80ms Peak-RMS mode to capture in-rush currents
Relative mode with DC-Zero mode &
5ms Crest (Instantaneous Peak-Hold) mode
SPECIAL FEATURES :
GENERAL SPECIFICATIONS :
íSensing : AC;
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True RMS
-10ºC to 50ºC
(£10ºC)
Below approx. 2.85V for Capacitance & Hz
Below approx. 2.5V for other functions
Jaws Opening size & conductor diameter : 51mm Max.
Display : 3-5/6 digits 6000 counts
Update Rate : 5 per second nominal
Polarity : Automatic
Operating Temperature :
Relative Humidity : Non condensing Maximum 90%R.H. at 10-30°C
decreasing linearly to 75% R.H. at 30-40°C & 45% R.H. at 40-50°C
Altitude : Operating below 2000m; Storage below 12000m
Storage Temperature : -20°C ~ 60°C, <80% R.H. (with battery removed)
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Temperature Coefficient : Nominal 0.10 x (specified accuracy) / C @ (-10 C –– 18 C or 28 C –– 50 C),
or otherwise Specified
Power Supply : Standard 1.5V AA Battery x 2
Power Consumption : typical 13mA for Current Functions
Low Battery :
APO timing : Idle for 32 minutes
APO Consumption : typical 5mA
Dimension : 258(L) x 94(W) x 44(H)mm
Weight : approx 392 gms.
ACCESSORIES :
Test leads set, Users Manual, Soft carrying pouch.
SAFETY :
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Safety :
Measurement Category :
E.M.C. :
Overload Protection :
Pollution Degree : 2
Transient Protection : 8.0kV (1.2/50ms surge)
Rugged Fire retarded casing.
LVD EN61010-2-032/EN61010-2-033 to CAT III 1000V & CAT IV 600V
Double insulation per UL/IEC/EN61010-1 Ed. 3.0, IEC/EN61010-2-033 Ed. 1.0,
CAN/CSA C22.2 No. 61010-1 Ed. 3.0, IEC/EN61010-2-032 Ed. 3.0 & IEC/EN61010-031 Ed. 1.1
CAT III 1000V AND CAT IV 600V AC & DC
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) :
ACA, DCA and DC+ACA Functions, in an RF field of 1V/m :
Total Accuracy = Specified Accuracy + 60 digits at around 200MHz~350MHz
DCmA and Ohm Functions, in an RF field of 1V/m : Total Accuracy = Specified Accuracy + 80 digits
Other Functions, in an RF field of 3V/m : Total Accuracy = Specified Accuracy + 20 digits
Current & Hz functions via jaws : 1000ADC/AAC rms at <400Hz
Other functions via terminals : 1000VDC/ VAC rms
Preliminary Data
KM088
BRYMEN
®
®
AC+DC TRMS
Clamp-on DMM
®®
1000A AC/DC TRMS DIGITAL CLAMPMETER
WITH VFD, EF-DETECTION
NEW
An ISO 9001:2008 Company
®
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27 Functions 46 Ranges
MODEL KM 088

ELECTRICAL SPECIFICATIONS : KM 088
o o
Accuracy is ± (% of reading digits + number of digits) or otherwise specified, at 23 C ± 5 C
Maximum Crest Factor <2.5:1 at full scale & <5:1 at half scale or otherwise specified, and with frequency spectrum not exceeding
the specified frequency bandwidth for non-sinusoidal waveforms.
Range
TM
AMPTIP CLAMP-ON AC CURRENT
1) 2) 3)
Accuracy
Resolution
40Hz ~ 100Hz
±(1.5%rdg + 5dgts)
0.01 A
60.00 A
100Hz ~ 400Hz
±(2.0%rdg + 5dgts)
0.01 A
60.00 A
1) Induced error from adjacent current-carrying conductor : < 0.02A/A
2) Specified with Relative Zero Dmode applied to offset the non-zero residual
readings, if any
3) Add 10d to the specified accuracy @ < 4A
Range
TM
AMPTIP CLAMP-ON DC CURRENT
1) 2) 3)
Accuracy
Resolution
±(1.5%rdg + 5dgts)
0.01 A
60.00 A
1) Induced error from adjacent current-carrying conductor : < 0.02A/A
2) Specified with DC-Zero mode applied to offset the non-zero residual readings,
if any
3) Add 10d to the specified accuracy @ < 4A
Range
TM
AMPTIP CLAMP-ON DC + AC CURRENT
1) 2) 3)
Accuracy
Resolution
DC, 40Hz ~ 100Hz
±(2.0%rdg + 7dgts)
0.01 A
60.00 A
100Hz ~ 400Hz
±(2.2%rdg + 7dgts)
0.01 A
60.00 A
1) Induced error from adjacent current-carrying conductor : < 0.08A/A
2) Specified with DC-Zero mode applied to offset the non-zero residual readings,
if any
3) Add 10d to the specified accuracy @ < 4A
All Specifications are subject to change without prior notice.
Chhaya com/D/chhaya/my documents/chhaya/backup/catlog/New catlog/2013-2014/KM 088.cdr
1) Induced error from adjacent current-carrying conductor : < 0.02A/A
2) Add 10d to the specified accuracy @ < 9A
3) Maximum Crest Factor < 1.4 : 1 at full scale & < 2.8 : 1 at half scale
REGULAR CLAMP-ON AC CURRENT
Range
40Hz ~ 100Hz
2)
60.00 A
600.0 A
3)
1000 A
100Hz ~ 400Hz
2)
60.00 A
600.0 A
3)
1000 A
1) 2)
Accuracy
±(1.8%rdg + 5dgts)
±(2.2%rdg + 5dgts)
Resolution
0.01 A
0.1 A
1 A
0.01 A
0.1 A
1 A
1) Induced error from adjacent current-carrying conductor : < 0.08A/A
2) Specified with DC-Zero mode applied to offset the non-zero residual readings,
if any
3) Add 10d to the specified accuracy @ < 9A
4) Maximum Crest Factor < 1.4 : 1 at full scale & < 2.8 : 1 at half scale
REGULAR CLAMP-ON DC + AC CURRENT
Range
DC, 40Hz ~ 100Hz
3)
60.00 A
600.0 A
4)
1000 A
100Hz ~ 400Hz
3)
60.00 A
600.0 A
4)
1000 A
1) 2)
Accuracy
±(2.2%rdg + 7dgts)
±(2.5%rdg + 7dgts)
Resolution
0.01 A
0.1 A
1 A
0.01 A
0.1 A
1 A
1) Induced error from adjacent current-carrying conductor : < 0.02A/A
2) Specified with DC-Zero mode applied to offset the non-zero residual readings,
if any
3) Add 10d to the specified accuracy @ < 9A
Range
REGULAR CLAMP-ON DC CURRENT
3)
60.00 A
1) 2)
Accuracy
±(1.8%rdg + 5dgts)
600.0 A
1000 A
Resolution
0.01 A
0.1 A
1 A
Range
AC VOLTAGE (with Digital Low-Pass Filter)
Accuracy
Resolution
Input Impedance : 10MW, 100pF nominal
50Hz ~ 60Hz
±(0.8%rdg + 5dgts)
0.1 V
600.0 V
1 V
1000 V
20Hz ~ 200Hz
±(1.5%rdg + 5dgts)
0.1 V
600.0 V
1 V
1000 V
200Hz ~ 400Hz
±(10%rdg + 5dgts)
0.1 V
600.0 V
1 V
1000 V
Range
DC + AC VOLTAGE (with Digital Low-pass Filter)
Accuracy
Resolution
Input Impedance : 10MW, 100pF nominal
50Hz ~ 60Hz
±(1.0%rdg + 7dgts)
0.1 V
600.0 V
1 V
1000 V
DC, 40Hz ~ 200Hz
±(1.8%rdg + 7dgts)
0.1 V
600.0 V
1 V
1000 V
200Hz ~ 400Hz
±(12%rdg + 7dgts)
0.1 V
600.0 V
1 V
1000 V
600.0 V
1000 V
±(0.8%rdg + 5dgts)
DC VOLTAGE
Accuracy
Resolution
Range
0.1 V
1 V

G-17, Bharat Industrial Estate, T. J. Road, Sewree (W), Mumbai - 400 015. INDIA.
Sales Direct.: 022-24156638, Tel. : [phone], Fax : [phone]
Email : [email protected], Website : www.kusamelectrical.com
An ISO 9001:2008 Company
®
ELECTRICAL SPECIFICATIONS : KM 088
All specifications are subject to change without prior notice.
Hz Line Level Frequency
Accuracy :
1) DC-bias, if any, not more than 50% of Sine RMS.
±(1%rdg + 5dgts)
Function
600 V
1000 V
1)
Sensitivity
(Sine RMS)
50 V
20 A
TM
60 A (AmpTip )
60 A
20 A
600 A
1000A
5.00Hz~999.9Hz
Range
40.00Hz~400.0Hz
40.00Hz~400.0Hz
Typical Voltage
Non-Contact EF-Detection
Indication : Bar-graph segments & audible beep tones proportional to the field strength
Detection Frequency : 50/60Hz
Detection Antenna : Inside the 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 one s ingle probe to test via
terminal COM for direct EF-Detection with best sensitivity.
20V (tolerance : 10V~36V)
110V (tolerance : 59V~165V)
440V (tolerance : 250V~1000V)
Bar-Graph Indication
55V (tolerance : 23V~83V)
220V (tolerance : 124V~330V)
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Chhaya com/D/chhaya/my documents/chhaya/backup/catlog/New catlog/2013-2014/KM 088.cdr
RESISTANCE
600.0W
6.000KW±(1.0%rdg + 5dgts)
Accuracy
Resolution
Range
0.1 W
1 W
60.00KW10 W
Open Circuit Voltage : 1.0VDC typical
200.0 mF
2500 mF
±(2.0%rdg + 4dgts)
CAPACITANCE
1)
Accuracy
Resolution
Range
0.1 mF
1 mF
1) Accuracies with film capacitor or better
2.000 V ±(1.5%rdg + 5dgts)
DIODE TESTER
1)
Accuracy
Resolution
Range
1 mV
Test Current : 0.3mA typically
Open Circuit Voltage : < 3.5VDC typically
AUDIBLE CONTINUITY TESTER
Audible Threshold Between 10 and 250WW
Response Time 32ms approx.
PEAK-RMS (ACV & ACA)
Response 80ms to >90%
CREST (PEAK-HOLD)
Accuracy Add 250 digits to specified accuracy for
changes > 5ms

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 fortypical 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.
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