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®

01

I. SAFETY :

Terms in this manual :

WARNING :

 Identifies  conditions  and  actions  that could result in 

                     serious injury or even death to the user.

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.

CAUTION :

 Identifies   conditions   and  actions  that  could  cause 

                    damage or malfunction in the instrument.

Measurement Category

Measurement Category IV

 is applicable to test & measuring circuits

connected  at  the  source  of  the  building’s  low-voltage  MAINS 
installation.  Examples are measurements on devices installed before
the main fuse or circuit breaker in the building installation.

Measurement Category III

 is applicable to test & measuring circuits

connected to the distribution part of the building’s low-voltage MAINS
installation.    Examples  are  measurements  on  distribution  boards
(including  secondary  meters),  circuit-breakers,  wiring,  including 
cables, bus-bars, junction boxes, switches, socket-outlets in the  fixed
installation,  &  equipment  for  industrial  use  &  some  other  equipment 
such  as  stationary  motors  with  permanent  connection  to  the 
fixed installation

Measurement Category II

 is applicable to test & measuring circuits

connected directly to utilization points (socket outlets & similar points)
of the low-voltage MAINS installation.  Examples are measurements
on  MAINS  CIRCUITS  of  household  appliances,  portable  tools  & 
similar equipment.

®

02

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  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. 
Never  attempt  a  voltage  measurement  with  the  test  lead  inserted 
into the    

INS./mA

 or         input jack that is available.  Only replace

the  blown  fuse  with  the  proper  rating  as  specified  in  this  manual.   
Only use  the Test Probe Assemblies provided with the equipment 
or  UL  Listed  Probe  Assemblies  with  same  rating  or  better.    IEC 
61010-031  requires  exposed  conductive  test  probe  tips  to  be 

£

  4mm  for  CAT  III  &  CAT  IV  ratings.    It  is  commonly  achieved  by 

permanently  over-molded  plastic  shrouds,  or  by  detachable  Cap 
shrouds for interchangeable  between CAT II ratings.  Refer to the 
category  markings  on  your  probe  assemblies  as  well  as  on  the 
add-on accessories, if any, for applicable rating changes.

The meter protection rating, against the users, is double insulation 
per IEC/UL/EN61010-1 Ed. 3.0, IEC/EN61010-2-030 Ed. 1.0, IEC/
EN61010-2-033 Ed. 1.0, IEC/UL/EN61010-031 Ed. 1.1 and CAN/
CSA-C22.2 No. 61010-1-12 Ed. 3.0 to measurement Category III 
1KV & Category-IV 600V, AC & DC. All Terminals are also rated to
such measurement  categories requirements.

The  meter  also  meets  the  relevant  parts  of  EN61557  for  CE 
requirements, & are not certified by UL or ETL. In particular, Part 1 
Ed. 2.0 General requirements, Part 2 Ed. 2.0 Insulation Resistance 
&  Part  4  Ed.  2.0  Resistance  of  earth  connection  &  equipotential 
bonding, where applicable.

Summary of Contents for KM 878

Page 1: ...C 18ºC or 28ºC 40ºC or otherwise specified Low Battery approx 4 6V APO Timing Idle for 20 minutes APO Consumption 50m A typical Dimension 208 L X 103 W X 64 5 H mm with holster Weight 635 gm with holster TRUE RMS DIGITAL INSULATION MULTIMETER MODEL KM 878 Preliminary Data D Chhaya My Documents Chhaya backup catlogs NEW CAT 2013 2014 KM 878 cdr An ISO 9001 2008 Company SPECIAL FEATURES All Specific...

Page 2: ... 0 V 1 V 1000 V Unspecified 3kHz 5kHz 4 rdg 5dgts 1 mV 6 000 V 10 mV 60 00 V 100 mV 600 0 V 1 V 1000 V Unspecified Range VFD AC VOLTAGE 1 Accuracy Resolution 10Hz 45Hz 4 rdg 5dgts 100 mV 600 0 V 45Hz 200Hz 2 rdg 5dgts 100 mV 600 0 V 1 Unspecified for fundamental frequency 440Hz 2 Accuracy linearly decreases from 2 5d 200Hz to 7 5d 440Hz Input impedance 10M 110pF nominal W 200Hz 440Hz 7 rdg 5dgts 2...

Page 3: ...250 V 500 V Range Test Current 1mA 50kW 1mA 100kW 1mA 250kW 1mA 500kW Accuracy 1 5 rdg 5dgts 3 000M 30 00M 300 0M W W W 1000 V 3000MW 25 0GW 1mA 1MW 10 rdg 5dgts 1 5 rdg 5dgts 2 0 rdg 5dgts 550 0MW Open Circuit Voltage 4VDC Live Circuit Detector Inhibit test if terminal voltage 2V prior to initialization of test Specified measuring range at percentage operating uncertainly B 30 per IEC EN61557 4 r...

Page 4: ...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 W...

Page 5: ...er 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 Resi...

Page 6: ...R MODEL KM 878 TABLE OF CONTENTS TITLE PAGE NO I II Cenelec Directives Safety III Special Features V Product Description Test Certificate IX Warranty IV General Specifications VI Operation VII Maintenance VIII 01 03 03 04 12 13 25 27 28 ...

Page 7: ...xpose 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 dur...

Page 8: ... 108 EC 04 IV GENERAL SPECIFICATIONS Display 3 5 6 digits 6 000 counts Polarity Automatic Update Rate 5 per second nominal 61 Segments Bar graph 40 per second max Operating Temperature 10ºC to 40ºC Relative Humidity Maximum relative humidity 90 for temperature up to 28ºC decreasing linearly to 50 relative humidity at 40ºC Pollution degree 2 IP Rating IP40 Storage Temperature 20ºC to 60ºC 80 R H wi...

Page 9: ... Earth Eontinuity Test measurements with new alkaline batteries at room temperature These are standard tests of 1W with a duty cycle of 5 seconds on and 25 seconds off 06 ELECTRICAL SPECIFICATIONS Accuracy is reading digits number of digits or otherwise specified at 23C 5C less than 80 relative humidity True RMS voltage current accuracies are specified from 1 to 100 of range or otherwise specified...

Page 10: ...d 440Hz Input impedance 10M 110pF nominal W VFD AC Voltage 1 Accuracy Resolution Range 600 0 V 4 rdg 5dgts 100 mV 10Hz 45Hz 600 0 V 2 rdg 5dgts 100 mV 45Hz 200Hz 600 0 V 2 7 rdg 5dgts 100 mV 200Hz 440Hz 08 ACmV Input Impedance 10MW 140pF nominal Accuracy Resolution Range 60 00 mV 600 0 mV 1 rdg 3dgts 10 mV 100 mV 50Hz 60Hz 60 00 mV 600 0 mV 2 rdg 3dgts 10 mV 100 mV 60Hz 3kHz 60 00 mV 600 0 mV 3 rd...

Page 11: ...ge at percentage operating uncertainty B 30 per IEC EN61557 4 requirements Accuracy Resolution Range 2 000 W 20 00 W 1 5 rdg 3dgts 200 mA 90 mA Measuring Range1 0 015W 2 199W 0 15W 21 99W DCmA Burden Voltage 3 0 mV mA Accuracy Resolution Range 60 00 mV 600 0 mV 0 5 rdg 3dgts 10 mV 100 mV 10 Resistance Open Circuit Voltage 1 5VDC typical 600 0 6 000 K 60 00 K 600 0 K 6 000 M 60 00 M W W W W W W 0 9...

Page 12: ...y Test function 5 C o m m o n G r o u n d reference Input Jack for all functions EXCEPT Insulation Resistance function 6 Input Jack for all functions EXCEPT Earth Continuity Test mA functions 7 Input Jack for insulation function Ground reference INS or mA function positive input 0 6 Test Voltage SELECT RANGE ZERO HOLD REC INSULATION H R TEST HzTemp mA Hz mV 200mA W V HzV VFD OFF INSULATION 50V 100...

Page 13: ... III MAX 600V CAT IV INSULATION LOCK VFD 1 SELECT AUTO V 0 6 V Test Voltage SELECT RANGE ZERO HOLD REC INSULATION H R TEST HzTemp mA Hz mV 200mA W V HzV VFD OFF INSULATION 50V 1000V 200mA INS mA INS Temp JACK WV COM HBC FUSED 0 25A HBC FUSED MAX 0 6A 1000V CAT III MAX 600V CAT IV INSULATION LOCK V 14 W Resistance Continuity Press the SELECT button momentarily to toggle the functions Last selection...

Page 14: ...ng 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 Diode Test Capacitance Function Press the SELECT button momentaril...

Page 15: ... MAX 600V CAT IV INSULATION mA Hz HzV OFF VFD AUTO 0 6 m Test Voltage SELECT RANGE ZERO HOLD H LOCK REC INSULATION R TEST HzTemp mA Hz mV 200mA INSULATION 50V 1000V A mA W V 200mA INS mA INS Temp JACK WV COM HBC FUSED 0 25A HBC FUSED MAX 0 6A 1000V CAT III MAX 600V CAT IV INSULATION SELECT 1 Earth Continuity Test Function This function measures the Resistance values of earth connection equipotenti...

Page 16: ...ATION AUTO 0 6 05 i7 Test Voltage SELECT RANGE ZERO HOLD H LOCK 200 REC INSULATION R TEST Hz mA TEST TEST HzTemp mA mV 200mA W V HzV VFD OFF INSULATION 50V 1000V 200mA INS mA INS Temp JACK WV COM HBC FUSED 0 25A HBC FUSED MAX 0 6A 1000V CAT III MAX 600V CAT IV INSULATION TEST Press Hold Press Hold TEST W 20 ZERO mode is useful for offsetting measuring probes residue resistance reading in consecuti...

Page 17: ...next or a function change The secondary display keeps showing the actual detected voltage readings TEST TEST TEST 21 AUTO Test Voltage SELECT RANGE ZERO HOLD H LOCK REC INSULATION R TEST mA LOCK LOCK HzV OFF VFD HzTemp mA Hz mV 200mA INSULATION 50V 1000V W V 1 200mA INS mA INS Temp JACK WV COM HBC FUSED 0 25A HBC FUSED MAX 0 6A 1000V CAT III MAX 600V CAT IV INSULATION TEST TEST 1 TEST TEST AUTO Te...

Page 18: ...ION 50V 1000V V W 200mA INS mA INS Temp JACK WV COM HBC FUSED 0 25A HBC FUSED MAX 0 6A 1000V CAT III MAX 600V CAT IV INSULATION Press Hold flash TEST TEST TEST TEST Press Hold TEST 24 Backlighted display Press button momentarily to toggle the LCD backlight The backlight will also be turned off automatically after approximate 37 seconds to extend battery life Auto or Manual ranging Volt mA Ω functi...

Page 19: ...ads etc and replace as necessary Double check operating procedure as described in this manual 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 26 Battery and Fuse replacement Loosen the screws from the access cover of the case bottom Lift the access cover Replace the batteries or fuse Re...

Page 20: ...CO 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 custome...

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