Kusam-meco KM 907 User manual

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
OPERATION
MANUAL
®
DUAL DISPLAY TRMS
DIGITAL MULTIMETER
MODEL - KM 907

® ®
6,000 COUNTS DUAL DISPLAY
TRMS DIGITAL MULTIMETER
WITH VFD FEATURE
MODEL - KM 907
Nearly every electrical engineer has a hand held
Multimeter. We sometimes take them for granted, until we
damage them or “burn them out”. If you incorrectly
connect your DMM to a circuit or have the DMM 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.
DMM 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 DMM becomes a low impedance circuit element. If
you accidentally connect this low impedance path across
your circuit, you’ll effectively short-circuit it. You can,
therefore send high current through your meter and
severely damage it. Unless the meter has a fused input,
you can even get an explosion or fire.
If you are measuring current in industrial environment, you
can easily exceed those ratings. The best way to avoid
damage is to use a clamp meter or to connect a clamp
attachment to your DMM.
To prevent excess current from flowing through your
meter, always disconnect the test leads from the circuit
under test whenever you change DMM functions, Set your
meter to the correct function, say current and its highest
range for the setting, say 20A.
Next, connect the test leads before you apply power to the
circuit. To be safe, start by setting your meter to its highest
range first.
Even if you correctly insert your DMM into the circuit, you
can still damage your meter. Don’t try to measure current
in excess of your meter’s capacity. Handheld DMMs
usually have a maximum current rating of 10A or 20A.
TAKE MEASUREMENT CAREFULLY AND YOU’LL
SPARE YOUR METER AND YOURSELF, SOME PAIN

® ®
TABLE OF CONTENTS
TITLE PAGE
Safety Information..............................................1
Safety Symbols...................................................4
Features...............................................................4
General Specifications.......................................5
Electrical Specification ......................................7
Product Description ........................................13
Measurement Procedure..................................15
Maintenance......................................................29
Test Certificate .................................................31
Warranty ...........................................................32
1
1. SAFETY INFORMATION
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 is intended only for indoor
use.
The meter protection rating, against the users, is
double insulation per IEC61010-1 2nd Ed.,
EN61010-1 2nd Ed., UL61010-1 2nd Ed., & CAN/
CSA C22.2 No. 61010.1-0.92,to Category II
1000 Volts, CAT III 600 Volts & CAT IV 300 Volts
AC & DC.
Terms In This Manual
WARNING Identifies conditions & actions that could
result in serious injury or even death to
the user.
CAUTION Identifies conditions & actions that could
cause damage or malfunction in the
instrument.
Terminals (to COM) measurement category:
V : Category II 1000V, Category III 600V
and Category IV 300V AC & DC.
A /mAµA : Category III 600 Volts AC and
300 Volts DC.

®®
2
Per IEC61010-1 2nd Ed. (2001) Measurement
Category
Measurement Category IV (CAT IV) is for
measurements performed at the source of the low-
voltage installation. Examples are electricity
meters and measurements on primary overcurrent
protection devices and ripple control units.
Measurement Category III (CAT III) is for measure-
ments performed in the building installation.
Examples are measurements on distribution boards,
circuit-breakers, wiring, including cables, bus-bars,
junction boxes, switches socket-outlets in the fixed
installation, & equipment for industrial use & some
other equipment, for example, stationary motors
with permanent connection to the fixed installation.
Measurement Category II (CAT II) is for measure-
ments performed on circuits directly connected to the
low voltage installation. Examples are measure-
ments on household appliances, portable tools &
similar equipment.
WARNING
To reduce the risk of fire or electric shock, do not
expose this product to rain or moisture. To avoid
electrical shock hazard, observe the proper safety
precautions when working with voltages above
60 VDC or 30 VAC rms. These voltage levels pose a
potential shock hazard to the user. Do not touch test
lead tips or the circuit being tested while power is
applied to the circuit being measured. Keep your
fingers behind the finger guards of the test leads
3
Disconnect the test leads from the test points
before changing functions. Always set the
instrument to the highest range and work down-
ward for an unknown value when using manual
ranging mode.
CAUTION
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. Do
not measure any current that exceeds the current
rating of the protection fuse(s). Do not attempt a
current measurement to any circuit where the
open circuit voltage is above the protection fuse(s)
voltage rating(s). Suspected open circuit voltage
should be checked with voltage functions. Never
attempt a voltage measurement with the test lead
inserted in to the µA/mA or A input jack. Only
replace the blown fuse(s) with the proper rating
as specified in this manual. Only use the lead
provided with the equipment or UL Listed Probe
Assembly.
The instruments conform to CENELEC Low-
Voltage directive 2006/95/EC and Electromagnetic
compatibility directive 2004/108/EC
2) CENELEC DIRECTIVES

® ®
4
3. INTERNATIONAL ELECTRICAL SYMBOLS
AC--Alternating Current
DC--Direct Current
Earth (Ground)
Double Insulation or Reinforced insulation
Fuse.
Caution ! Risk of electric shock
Caution ! Refer to the explanation in this
Manual.
7
~
˜ VFD-V & VFD-Hz in Dual Display
Backlighted LCD˜
˜ 5msCREST-MAX capture mode (Peak Hold)
˜ Autoranging Relative -Zero mode
Display Hold˜
˜ EF-Detection (NCV)
˜ Beep-Jack input warning
˜ Hz Line Level Frequency
˜ Hz Logic Level Frequency
˜ Diode Test & Continuity Test
4) SPECIAL FEATURES:
5
5) GENERAL SPECIFICATIONS
— Display :
3-5/6 digits 6000 counts + 3 digits 999 counts
dual display LCD.
— Polarity : Automatic
— Update Rate: 5 per second nominal;
— Operating Temperature : 0°C to 40°C
— Pollution degree : 2
— Altitude : Operating below 2000m
— Relative Humidity :
Maximum relative humidity 80% for
temperature up to 31°C decreasing linearly to
50% relative humidity at 40°C
— Storage Temperature :
-20°C to 60°C,<80%R.H.(with battery removed)
— Temperature Coefficient (T.C.) :
Nominal 0.15 x (specified accuracy) / °C @
(0°C--18°C or 28°C--40°C) or otherwise
specified.
— Sensing : True RMS sensing.
— Transient Protections : 6kV(1.2/50ms surge)
— Safety : Double insulation per IEC61010-1
nd nd
2 Ed., EN61010-1 2 Ed., UL61010-1 2nd Ed.
& CAN/CSA C22.2 No.61010.1-0.92 to CAT II
1000V, CAT III 600V and CAT IV 300V AC & DC
— Power consumption : 5.4mA typical
— Low battery : Below approx. 2.4V
— APO Timing : Idle for 34 minutes
— APO Consumption : 10µA typical

®®
6
— E.M.C. : 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 +
100 digits
Performance above 3V/m is not specified
— Terminals (to COM) Measurement Category :
V : CAT II 1000V, CAT III 600V &
CAT IV 300V AC & DC.
mAmA : CAT III 500Vac & 300Vdc.
A : CAT III 600Vac & 300Vdc.
— Power Supply : 1.5V AAA Size battery X 2
— Dimension : 186(L) X 87(W) X 35.5(H)mm
198(L) X 97(W) X 55(H)mm with holster.
— Weight : 340gm; 430gm with holster.
— Accessories : Test leads(pair),User's Manual,
Holster, Batteries installed.
— Overload Protections:
mA & mA : 0.4A/1000V DC/AC rms, IR 30kA,
F Fuse
A : 11A/1000V DC/AC rms, IR 20kA,
F Fuse
V : 1100V DC/AC rms
mV, W & others : 1000V DC/AC rms
— Optional Accessories : Bkp60 banana plug
K-type thermocouple, BKB32 banana plug to
type-K socket plug adaptor.
7
6) ELECTRICAL SPECIFICATIONS :
DC VOLTAGE
60.00 mV ±(0.6%rdg + 3dgts)
600.0 mV
6.000 V
60.00 V
600.0 V
Input Impedance : 10MW, 50pF nominal
±(0.3%rdg + 3dgts)
±(1.2%rdg + 3dgts)
±(0.6%rdg + 3dgts)
±(1.0%rdg + 3dgts)
Accuracy
Resolution
Range
1000 V ±(1.0%rdg + 3dgts)
0.01 mV
0.1 mV
0.001 V
0.01 V
0.1 V
1 V
AC VOLTAGE
Accuracy
Resolution
Range
60.00 mV ±(1.3%rdg + 5dgts)
600.0 mV
6.000 V
60.00 V
600.0 V
Input Impedance : 10MW, 50pF nominal
±(1.0%rdg + 5dgts)
±(2.0%rdg + 5dgts)
±(1.3%rdg + 5dgts)
±(2.0%rdg + 5dgts)
1000 V ±(2.0%rdg + 5dgts)
50Hz ~ 500Hz
0.01 mV
0.1 mV
0.001 V
0.01 V
0.1 V
1 V
True RMS Model AC Voltage & AC current
accuracies are specified from 5% to 100% of range
or otherwise specified. Maximum Crest Factor
<1.65:1 at full scale & <3.30:1 at half scale, & with
frequency components fall within the specified
frequency bandwidth for non-sinusoidal waveforms.
Accuracy is ± (%readings digits + number of
o o
digits) or otherwise specified, at 23 C ± 5 C & less
than 75% R.H.

® ®
8
VFD-VOLTAGE (LPF-ACV)
6.000 V
±(3.5%rdg + 8dgts)
60.00 V
600.0 V
1000 V
1)
Accuracy
Resolution
Range
10.0Hz ~ 20.0Hz
20.0Hz ~ 200Hz
2)
200Hz~400Hz
±(2.5%rdg + 8dgts)
6.000 V
60.00 V
600.0 V
1000 V
±(7.0%rdg + 8dgts)
6.000 V
60.00 V
600.0 V
1000 V
Input Impedance : 10MW, 50pF nominal
1) Not specified for fundamental frequency > 400Hz
2) Accuracy linearly decreases from 2.5% + 8d @ 200Hz to
7.0% + 8d @ 400Hz
0.001 V
0.01 V
0.1 V
1 V
0.001 V
0.01 V
0.1 V
1 V
0.001 V
0.01 V
0.1 V
1 V
Crest-MAX Capture (V & A only)
Accuracy :
Specified accuracy plus
250 digits for change > 5ms
in duration
9
RESISTANCE
600.0 W±(0.8%rdg + 8dgts)
6.000 KW
60.00 KW
600.0 KW
6.000 MW
Open Circuit Voltage : 0.45VDC typical.
±(0.6%rdg + 4dgts)
±(1.5%rdg + 5dgts)
Accuracy
Resolution
Range
60.00 MW±(2.5%rdg + 5dgts)
0.1 W
0.001 KW
0.01 KW
0.1 KW
0.001 MW
0.01 MW
DC CURRENT
600.0 mA±(1.2%rdg + 5dgts)
6000 mA
60.00 mA
600.0 mA
6.000 A
1)9A continuous, >9A to 15A for 30 seconds max with
5 minutes cool down interval.
±(1.0%rdg + 3dgts)
±(2.0%rdg + 5dgts)
±(1.5%rdg + 3dgts)
±(1.5%rdg + 5dgts)
Accuracy
Resolution
Range
1)
9.00 A ±(1.2%rdg + 3dgts)
Burden Voltage :
Range : 600.0 mA - 0.25mV/mA
6000 mA - 0.25mV/mA
60.00 mA - 4.0mV/mA
600.0 mA - 4.0mV/mA
6.000 A - 0.045V/A
1)
9.00 A - 0.045V/A
0.1 mA
1 mA
0.01 mA
0.1 mA
0.001 A
1)
0.01 A
AUDIBLE CONTINUITY TESTER
between 10W and 120W< 32ms
Audible Threshold Response Time

®®
±(2.0%rdg + 6dgts)
±(1.5%rdg + 5dgts)
±(2.5%rdg + 6dgts)
±(2.1%rdg + 5dgts)
±(2.0%rdg + 6dgts)
±(1.8%rdg + 5dgts)
50Hz – 500Hz
10
CAPACITANCE
2)
60.00 nF
±(2.0%rdg + 5dgts)
600.0 nF
6.000 mF
60.00 mF±(3.5%rdg + 5dgts)
Resolution
Range
±(4.0%rdg + 5dgts)
1)
Accuracy
3)
600.0 mF
3)
3000 mF
1) Accuracies with film capacitor or better
2) Accuracy unspecified.
3) T. C. : 0.25 x specified accuracy / °C @ 0 ~ 18°C,
28 ~ 40°C
0.01 nF
0.1 nF
0.001 mF
0.01 mF
0.1 mF
1 mF
AC CURRENT
1)9A continuous, >9A to 15A for 30 seconds max with
5 minutes cool down interval.
Accuracy
Resolution
Range
Burden Voltage :
Range : 600.0 mA - 0.25mV/mA
6000 mA - 0.25mV/mA
60.00 mA - 4.0mV/mA
600.0 mA - 4.0mV/mA
6.000 A - 0.045V/A
1)
9.00 A - 0.045V/A
600.0 mA
6000 mA
60.00 mA
600.0 mA
6.000 A
1)
9.00 A
0.1 mA
1 mA
0.01 mA
0.1 mA
0.001 A
1)
0.01 A
11
Accuracy : 0.2% + 4d
1)VFD sensitivity linearly decreases from 10% F.S.
@ 200Hz to 35% F.S. @ 400Hz
AC Function
Range
600 mV
6 V
60 V
600 V
1000 V
VFD 6 V
VFD 60 V
VFD 600 V
600 mA
6000 mA
60 mA
600 mA
6 A
9 A
Sensitivity
(Sine RMS) Range
10Hz ~ 100kHz
10Hz ~ 10kHz
10Hz ~ 50kHz
10Hz ~ 50kHz
45Hz ~ 10kHz
10Hz ~ 400Hz
10Hz ~ 400Hz
10Hz ~ 400Hz
10Hz ~ 10kHz
10Hz ~ 10kHz
10Hz ~ 10kHz
10Hz ~ 10kHz
20Hz ~ 3kHz
20Hz ~ 3kHz
0.1 V
0.6 V
6 V
60 V
600 V
1)
0.6V ~ 2.1V
1)
6V ~ 21 V
1)
60V ~ 210V
60 mA
600 mA
6 mA
60 mA
0.6 A
6 A
Hz LOGIC LEVEL FREQUENCY
Range
0.2% + 4d
5.000Hz ~ 300.0KHz
1) Accuracy is specified at <20VAC rms
Input Signal : Square wave with duty
cycle > 40% & 70%, or Sine wave
Sensitivity :
5Hz--20Hz : > 1Vrms Sine wave;
20Hz--300kHz : > 2.6Vp; or 1.9Vrms Sine wave.
Accuracy
~ HZ LINE LEVEL FREQUENCY (DUAL DISPLAY)

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12
DIODE TESTER
Range Test Current
(Typical)
Open Circuit
Voltage
NON-CONTACT EF-DETECTION
Typical Voltage
20V (tolerance : 10V ~ 36V)
55V (tolerance : 23V ~ 83V)
110V (tolerance : 59V ~ 165V)
220V (tolerance : 124V ~ 330V)
440V (tolerance : 250V ~ 1000V)
Bar-Graph Indication
-
- -
- - -
- - - -
- - - - -
Indication : Bar-graph segments & audible beep tones
proportional to the field strength
Detection Frequency : 50/60Hz
Detection Antenna : Top end of the meter 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.
<1.8V DC typical
1.000V 0.2mA
13
7) PRODUCT DESCRIPTION
5ms-MAX
VFD
HzV
V
Hz
V
EF
mV Hz mA mA
Hz Hz
AHz
OFF
MAX
9A
FUSED
MAX 0.6A
FUSED
300V CAT IV
600V CAT III
1000V CATII
MAX
1
2
3
5
4
6
7

® ®
14
5) Input Jack (+) for all functions EXCEPT
current (mA, mA, A) functions.
6) Common (Ground reference) Input Jack (-)
for all functions.
7) Input Jack (+) for milli-amp (mA) &
micro-amp (mA) functions.
1) 3-5/6 digits 6000 counts + 999 counts Dual
LCD display
2) Push-buttons for special functions &
features.
3) Selector to turn the Power ON or OFF &
select a function.
4) Input Jack (+) for 10A (20A for 30sec)
current function
15
5ms-MAX
VFD
HzV
V
Hz
V
EF
mV Hz mA mA
Hz Hz
AHz
OFF
MAX
9A
FUSED
MAX 0.6A
FUSED
300V CAT IV
600V CAT III
1000V CATII
MAX
SELECT
1
600
Before & after hazardous voltage measurements,
test the voltage function on a known source such
as line voltage to determine proper meter
functioning.
CAUTION
+Hz
VFD-ACV & VFD-Hz (Line Level)
8) MEASUREMENT PROCEDURE
5ms-MAX
VFD
HzV
V
Hz
V
EF
mV Hz mA mA
Hz Hz
AHz
OFF
MAX
9A
FUSED
MAX 0.6A
FUSED
300V CAT IV
600V CAT III
1000V CATII
MAX
VFD
+ Hz
60.3
208.3

®®
5ms-MAX
VFD
HzV
V
Hz
V
EF
mV Hz mA mA
Hz Hz
AHz
OFF
MAX
9A
FUSED
MAX 0.6A
FUSED
300V CAT IV
600V CAT III
1000V CATII
MAX
60.3
16
Hz Input sensitivity varies automatically with
voltage range selected. 6V range has the
highest & 1000V range has the lowest. Press
SELECT button momentarily toggles to higher
resolution VFD-Hz in main display. The display
shows the selected voltage range for about one
second before displaying Hz readings. Pressing
the RANGE button momentarily repeatedly to
display and select any other voltage range. If the
Hz reading becomes unstable, select higher
voltage range to avoid electrical noise. If the
reading shows zero, select lower voltage range
for better sensitivity.
17
+Hz
Function defaults at VFD-ACV . By default,
voltage is set at 600V & 1000V two auto-ranges to
best cope with most Variable Frequency Drives
(VFD) measurements. High noise-rejection
frequency measurement algorithm and Low-pass
filter circuit are permanently bundled with all
voltage and frequency function-ranges within this
rotary-switch position. Press the RANGE button
momentarily to select other ranges only when
needed.
5ms-MAX
VFD
HzV
V
Hz
V
EF
OFF
MAX
9A
FUSED
MAX 0.6A
FUSED
A mA mA COM WV
1.082
SELECT RANGE HOLD
300V CAT IV
600V CAT III
1000V CATII
MAX
H
C
AHz
mA
Hz
mA
Hz
mV Hz
kHz
AUTO

®®
18
+Hz
ACV & Hz (Line Level)
5ms-MAX
VFD
HzV
V
Hz
V
EF
OFF
MAX
9A
FUSED
MAX 0.6A
FUSED
A mA mA COM WV
10.8
239.8
SELECT RANGE HOLD
300V CAT IV
600V CAT III
1000V CATII
MAX
H
C
AHz
mA
Hz
mA
Hz
mV Hz
V
Hz
AUTO
Hz
V
5ms-MAX
VFD
HzV
V
Hz
V
EF
OFF
MAX
9A
FUSED
MAX 0.6A
FUSED
A mA mA COM WV
600
SELECT RANGE HOLD
300V CAT IV
600V CAT III
1000V CATII
MAX
H
C
AHz
mA
Hz
mA
Hz
mV Hz
V
SELECT
1
19
+Hz
DCmV, ACmV & Hz (Logic Level)
Function defaults at DCmV. Press the SELECT
button momentarily to select the subject functions in
sequence. Hz (Logic Level) is set at the highest
available sensitivity for logic level frequency
measurements.
All the voltage and frequency function-ranges
within this rotary-switch position are set at
regular frequency response without employing
+Hz
LPF. Function defaults at ACV . Hz Input
sensitivity varies automatically with voltage
range selected. 6V range has the highest and
1000V range has the lowest. Press SELECT
button momentarily toggles to higher resolution
Hz in main display. The display shows the
selected voltage range for about one second
before displaying Hz readings. Pressing the
RANGE button momentarily repeatedly to
display and select any other voltage range. If
the Hz reading becomes unstable, select higher
voltage range to avoid electrical noise. If the
reading shows zero, select lower voltage range
for better sensitivity.

® ®
20
5ms-MAX
VFD
HzV
V
Hz
V
EF
OFF
MAX
9A
FUSED
MAX 0.6A
FUSED
A mA mA COM WV
290.8
SELECT RANGE HOLD
300V CAT IV
600V CAT III
1000V CATII
MAX
H
C
AHz
mA
Hz
mA
Hz
mV Hz
AUTO
kHz
SELECT
2
5ms-MAX
VFD
HzV
V
Hz
V
EF
OFF
MAX
9A
FUSED
MAX 0.6A
FUSED
A mA mA COM WV
60.
SELECT RANGE HOLD
300V CAT IV
600V CAT III
1000V CATII
MAX
H
C
AHz
mA
Hz
mA
Hz
mV Hz
AUTO
mV
mV
10
5ms-MAX
VFD
HzV
V
Hz
V
EF
OFF
MAX
9A
FUSED
MAX 0.6A
FUSED
A mA mA COM WV
324.8
SELECT RANGE HOLD
300V CAT IV
600V CAT III
1000V CATII
MAX
H
C
AHz
mA
Hz
mA
Hz
mV Hz
AUTO
mV
1SELECT
60.0
Hz
21
W
5ms-MAX
VFD
HzV
V
Hz
V
EF
OFF
MAX
9A
FUSED
MAX 0.6A
FUSED
A mA mA COM WV
000.6
SELECT RANGE HOLD
300V CAT IV
600V CAT III
1000V CATII
MAX
H
C
AHz
mA
Hz
mA
Hz
mV Hz
SELECT
1
DCV
Turn rotary switch to DCV function position
directly.
5ms-MAX
VFD
HzV
V
Hz
V
EF
OFF
MAX
9A
FUSED
MAX 0.6A
FUSED
A mA mA COM WV
3.025
SELECT RANGE HOLD
300V CAT IV
600V CAT III
1000V CATII
MAX
H
C
AHz
mA
Hz
mA
Hz
mV Hz
AUTO
V
V
5ms-MAX
VFD
HzV
V
Hz
V
EF
OFF
MAX
9A
FUSED
MAX 0.6A
FUSED
A mA mA COM WV
3.03
SELECT RANGE HOLD
300V CAT IV
600V CAT III
1000V CATII
MAX
H
C
AHz
mA
Hz
mA
Hz
mV Hz
AUTO
kW
W

®®
22
Defaults at W. Press SELECT button
momentarily 2 times to select Capacitance
function. Relative zero mode can be used to
zero out the parasitic capacitance of the leads
and the internal protection circuitry of the meter
when measuring low capacitance in the order of
Pico Farad (pF).
Capacitance
CAUTION
Discharge capacitors before making any
measurement. Large value capacitors should be
discharged through an appropriate resistance
load.
W Resistance, Continuity
Usi n g Res i sta n ce, C o nti n uit y, D i ode o r
Capacitance function in a live circuit will produce
false results and may damage the instrument. In
many cases the suspected component(s) must be
disconnected from the circuit to obtain an accurate
measurement reading.
Defaults at W. Press SELECT button momentarily
to select continuity function which is convenient
for checking wiring connections and operation of
switches. A continuous beep tone indicates a
complete wire.
CAUTION
23
5ms-MAX
VFD
HzV
V
Hz
V
EF
OFF
MAX
9A
FUSED
MAX 0.6A
FUSED
A mA mA COM WV
.OL
SELECT RANGE HOLD
300V CAT IV
600V CAT III
1000V CATII
MAX
H
C
AHz
mA
Hz
mA
Hz
mV Hz
V
AUTO
5ms-MAX
VFD
HzV
V
Hz
V
EF
OFF
MAX
9A
FUSED
MAX 0.6A
FUSED
A mA mA COM WV
302.8
SELECT RANGE HOLD
300V CAT IV
600V CAT III
1000V CATII
MAX
H
C
AHz
mA
Hz
mA
Hz
mV Hz
SELECT
2
AUTO
5ms-MAX
VFD
HzV
V
Hz
V
EF
OFF
MAX
9A
FUSED
MAX 0.6A
FUSED
A mA mA COM WV
0.600
SELECT RANGE HOLD
300V CAT IV
600V CAT III
1000V CATII
MAX
H
C
AHz
mA
Hz
mA
Hz
mV Hz
SELECT
3
V

®®
Diode Test
Defaults at W. Press SELECT button
momentarily 3 times to select 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).
24
5ms-MAX
VFD
HzV
V
Hz
V
EF
OFF
MAX
9A
FUSED
MAX 0.6A
FUSED
A mA mA COM WV
Ef.
SELECT RANGE HOLD
300V CAT IV
600V CAT III
1000V CATII
MAX
H
C
AHz
mA
Hz
mA
Hz
mV Hz
SELECT
2
EF
5ms-MAX
VFD
HzV
V
Hz
V
EF
OFF
MAX
9A
FUSED
MAX 0.6A
FUSED
A mA mA COM WV
SELECT RANGE HOLD
300V CAT IV
600V CAT III
1000V CATII
MAX
H
C
AHz
mA
Hz
mA
Hz
mV Hz
Electric Field EF-Detection
Defaults at °C. Press SELECT button momentarily
2 times to select E.F. function. The meter display
“E.F.” when it is ready. Signal strength is indicated
as a series of bar-graph segments on the display
plus variable beep tones.
25
5ms-MAX
VFD
HzV
V
Hz
V
EF
OFF
MAX
9A
FUSED
MAX 0.6A
FUSED
A mA mA COM WV
Ef.
SELECT RANGE HOLD
300V CAT IV
600V CAT III
1000V CATII
MAX
H
C
AHz
mA
Hz
mA
Hz
mV Hz
5ms-MAX
VFD
HzV
V
Hz
V
EF
OFF
MAX
9A
FUSED
MAX 0.6A
FUSED
A mA mA COM WV
SELECT RANGE HOLD
300V CAT IV
600V CAT III
1000V CATII
MAX
H
C
AHz
mA
Hz
mA
Hz
mV Hz
Live Ground
— Non-Contact EF-Detection : An antenna is
located along the top end of the meter, which
detects electric field surrounding current-carrying
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.

®®
26
5ms-MAX
VFD
HzV
V
Hz
V
EF
OFF
MAX
9A
FUSED
MAX 0.6A
FUSED
A mA mA COM WV
SELECT RANGE HOLD
300V CAT IV
600V CAT III
1000V CATII
MAX
H
C
AHz
mA
Hz
mA
Hz
mV Hz
A
3042
mA
AUTO
m
5ms-MAX
VFD
HzV
V
Hz
V
EF
OFF
MAX
9A
FUSED
MAX 0.6A
FUSED
A mA mA COM WV
SELECT RANGE HOLD
300V CAT IV
600V CAT III
1000V CATII
MAX
H
C
AHz
mA
Hz
mA
Hz
mV Hz
A
20
1
SELECT
mA
AUTO
1.8
m
Hz
50.0
mA, mA and A Current functions
Function defaults DC. Press SELECT button
+Hz
momentarily to select AC . Hz Input sensitivity
varies automatically with current range selected.
600mA range has the highest and 10A range has
the lowest. Press SELECT button momentarily
further select higher resolution Hz in main display.
The display shows the selected current range for
about one second before displaying Hz readings.
Pressing the RANGE button momentarily
repeatedly to display and select any other current
range. If the Hz reading becomes unstable,
select higher current range to avoid electrical
noise. If the readings shows zero, select lower
current range for better sensitivity.
27
5ms CREST-MAX capture mode
Press 5ms-MAX (HOLD) button for 1 second c
or more 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 the button momentarily again can toggle
the combination use of HOLD feature. Press the
button for 1 second or more to exit CREST-MAX
capture mode. Auto-ranging and Auto-Power Off
are disabled automatically in this mode.
CAUTION
When measuring a 3-phase system, special
attention should be taken to the phase-to-phase
voltage which is significantly higher than the
phase-to earth voltage. To avoid exceeding the
voltage rating of the protection fuse(s)
accidentally, always consider the phase-to-phase
voltage as the working voltage for the protection
fuse(s).
5ms-MAX
VFD
HzV
V
Hz
V
EF
OFF
MAX
9A
FUSED
MAX 0.6A
FUSED
A mA mA COM WV
SELECT RANGE HOLD
300V CAT IV
600V CAT III
1000V CATII
MAX
H
C
AHz
mA
Hz
mA
Hz
mV Hz
Hz
60.0
AUTO
5ms-MAX
VFD
HzV
V
Hz
V
EF
OFF
MAX
9A
FUSED
MAX 0.6A
FUSED
A mA mA COM WV
SELECT RANGE HOLD
300V CAT IV
600V CAT III
1000V CATII
MAX
H
C
AHz
mA
Hz
mA
Hz
mV Hz
A
6
2
SELECT
A

® ®
28
Disabling Auto-Power-Off
Press 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.
Manual or Auto-ranging
Set Beeper Off
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.
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
or turn the slide switch OFF and then back on.
Always turn the rotary switch to the OFF position
when the meter is not in use .
Press the RANGE button momentarily to select
manual-ranging, and the meter will remain in the
range it was in, the LCD turns off. Press AUTO
the button momentarily again to step through the
ranges. Press the hold the button for 1 second or
more and release to resume auto-ranging.
Note: Manual ranging feature is not available in Hz
and functions.
Relative-Zero ( ) moder
Relative-Zero allows the user to offset the
meter consecutive measurements with the main
display displaying reading as the reference value.
Press the button momentarily to toggle r
relative zero mode.
Hold
The HOLD feature freezes the display for later view.
Press the HOLD button momentarily to toggle the
HOLD feature.
29
Trouble Shooting
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.
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 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. Refer to the
WARRANTY selection for obtaining warranty or
repairing service.
Cleaning and Storage
Periodically wipe the case with a damp cloth and
mild detergent; do not use abrasive or solvents.
If the meter is not to be used for periods of longer
than 60 days, remove the batteries and store them
separately.
Accuracy and calibration
Accuracy is specified for a period of one year after
calibration. Periodic calibration at interval of one
year is recommended to maintain meter accuracy.
If self diagnostic massage “C_Er” is being
displayed while powering on, some meter ranges
might be largely out of specifications.
MAINTENANCE
WARNING
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.

®®
Battery & Fuse replacement
Standard 1.5V AAA size
(NEDA 24A or IEC LR03) battery X 2.
Battery use :
Fuse use :
Fuse (FS1) for mAmA current input :
0.4A/1000V AC &DC, IR 30kA, F fuse,
or better
Fuse (FS2) for A current input :
11A/1000V AC & DC, IR 20kA, F fuse,
or better
30
until it unsnaps from the
case top. Replace the
blown fuse(s) and / or
the battery. Replace the
case bottom, and ensure
that all the gaskets are
properly seated and the
two snaps on the case
top (near the LCD side)
are engaged. Re-fasten
the screws.
Fuse replacement (and also battery replace-
ment for splash proof version without battery
access door):
Loosen the 2 screws from the battery access door
of the case bottom. Lift the battery access door
and thus the battery compartment up. Replace
the battery. Re-fasten the screws.
Battery replacement with battery access door:
Loosen the 4 screws from the case bottom. Lift
the end of the case bottom nearest the input jacks
31
MUMBAI
TEST CERTIFICATE
DIGITAL 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 907
SERIAL NO. ___________
DATE: ___________
ISO 9001
REGISTERED
QC
PASS
KUSAM-MECO

® ®
32
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, 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”.
G 17,Bharat Industrial Estate, T. J. Road,
Sewree (W), Mumbai - 400 015. INDIA.
Sales Direct : [phone], 27754546
Tel. : [phone].
Email : [email protected]
Website : www.kusamelectrical.com
33
®
“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.