KM 859 CF- NEW - Kusam Electrical Industries Ltd.
Contents
1. X X X X X X X X X X e ae ae e ae LIST OF PRODUCTS Digital Multimeter Digital AC amp AC DC Clampmeter AC Clamp Adaptor AC DC Current Adaptor Transistorised Electronic Analog amp Digital Insulation Resistance Testers upto 10 KV Digital Sound Level Meter amp Sound Level Calibrator Digital contact amp Non contact Type Tachometer Digital Non contact infrared Thermometer Thermo Hygrometer Thermo Anemometer Wood amp Paper Moisture Meter Distance Meter Digital Hand Held Temperature Indicators Digital Lux Meter Network Cable Tester Power Factor Regulator Maximum Demand Controller Digital Power Meter Earth Resistance Tester Gas Analysers Panel Meters Battery Testers DC Power Supply Vehicle Tracking System DIGITAL MULTIMETER KM 857 KM 859CF OPERATION MANUAL DIGITAL MULTIMETER KM 857 KM 859CF L COM T T L MAK UDA MAX J max 0A HBC FUSED lt 1000v CAT M HBC FUSED mm7 GIOV CAT V DC ACI00KH2 TRMS DMM a iauna TAKE MEASUREMENTS CAREFULLY AND YOU LL SPARE YOUR METER AND YOURSELF SOME PAIN 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 charg2. Lift the end of the case bottom nearest the input jacks 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 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 857 KM 859CF SERIAL NO fac N ISO 9001 REGISTERED Fass LIMITED WARRANTY Each KUSAM MECO product is warranted to be free from defects in material and workmanship under normal use amp service The warranty period is one year 12 months and begins from the date of despatch of goods In case any defect occurs in functioning of the instrument under proper use within the warranty period the same will be rectified by us free of charges provided the to and fro freight charges are borne by you This warranty extends only to the original buyer or end user customer of a KUSAM MECO authorized dealer This warranty does not apply for damaged Ic s fuses burnt PCB s disposable batteries carrying case test leads or to any product which in KUSAM MECO s opinion has been misused
3. 5 Bus bars and electrical panels to vibrate AC Bandwidth AC bandwidth of a DMM is the range of frequencies over which AC measurements can be made within the specified accuracy It is not the frequency measurement function and is the frequency response of the AC functions ADMM cannot accurately measure the AC value with frequency spectrums beyond the AC bandwidth of the DMM Therefore wide AC bandwidth plays an important role in high performance DMMs In reality complex waveforms noise and distorted waveforms contain much higher frequency spectrum than its fundamental NMRR Normal Mode Rejection Ratio NMRR is the DMM s ability to reject unwanted AC noise effect that can cause inaccurate DC measurements NMRR is typically specified in terms of dB decibel This series has a NMRR specification of gt 60dB at 50 and 60Hz which is a good and definite ability to reject the effect of noise when making DC measurements CMRR Commaon Mode Rejection Ratio Common mode voltage is voltage present on both the COM and VOLTAGE input terminals of a DMM with respect to ground CMRR is the DMM s ability to reject common mode voltage effect that can cause digit rolling or offset in voltage measure ments This series has a CMRR specifications of gt 80dB at DC to 60Hz in ACV function and gt 120dB at DC 50 and 60Hz in DCV function If neither NURR nor CMRR specification is specified a DMM s performance will be uncertain Analog
4. 500 00kQ 5 0000MQ 0 2 6d 0 4 6d 50 000MQ 2 0 6d 2 0 6d Open Circuit Voltage lt 1 3VDC lt 3VDC for 500Q range AUDIBLE CONTINUITY TESTER Audible threshold between 20Q and 200Q Response time lt 100us gt DIODE TESTER Test Open Range Accuracy Current Circuit Typical Voltage kusam meto CAPACITANCE AC amp AC DC CURRENT Range Accuracy KM859CF KM857 Range 7 caracy Voltage 0 5 50d 1 0 40d Accuracies with film capacitor or better 500 00mA 3 3mV mA In manual ranging mode measurements not 5 0000A 45mV A specified below 45 0uF and 450uF for 500 0uF 10 000A and 9999uF ranges respectively 0 15mV LA Accuracy 5000 0uA 0 15mV pLA 0 a 5 50 000mA 3 3mV mA 50 0 Cto 1000 0 C 0 3 1 C 7 50d 11 0 40d 0 58 0 F to 1832 0 F 0 3 2 F 500 00mA 3 3mV mA 5 0000A 45mV A Thermocouple range amp accuracy not included 10 000A 45mV A T1 T2 DUAL TEMPERATURE KM859CF only DC CURRENT Accuracy Burden Voltage 500 00uA 0 15mV uA 500 00uA 0 15 20d 0 15MV uA 5000 0uA 0 15mV nA o 5000 0uA 0 1 20d 0 15MV uA SOO a 0 15 20d 3 3 mV mA 500 00mA 3 3mV mA 0 1 30d 3 3 mV mA 5 0000A 5 0000A 0 5 20d 45 mV A 10 000A 45mViA o 10 000A 0 5 20d ee TINIE 10A continuous gt 10A to 15A 10A continuous gt 10A to 15A to 20A for KM 859CF to 20A for KM859CF for 30 second max with 5 for 30 second max with 5 m
5. altered neglected contaminated or damaged by accident or abnormal conditions of operation or handling KUSAM MECO authorized dealer shall extend this warranty on new and unused products to end user customers only but have no authority to extend a greater or different warranty on behalf of KUSAM MECO KUSAM MECO s warranty obligation is limited at option free of charge repair or replacement of a defective product which is returned to a KUSAM MECO authorized service center within the warranty period THIS WARRANTY IS BUYER S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TOANY 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 G 17 Bharat Industrial Estate T J Road Sewree W Mumbai 400 015 INDIA Sales Direct 022 24156638 Tel 91 22 24124540 24181649 Fax 91 22 24149659 Email kusam_meco vsnl net Web www kusam meco co in www kusamelectrical com
6. bar graph The analog bar graph provides a visual indication of measurement like a traditional analog meter needle It is excellent in detecting faulty contacts identifying potentiometer clicks and indicating signal spikes during adjustments Analog bar graph is not available in AC DC True RMS Voltage amp Current modes 6 OPERATION CAUTION Before and after hazardous voltage measurements test the voltage function on a known source such as line voltage to determine proper meter functioning AC Voltage DC Voltage DC AC Voltage amp Hz Line Level Frequency In AC Voltage press SELECT button momentarily to toggle between AC and dBm In DC Voltage press SELECT button momentarily to toggle between DC and DC AC In mV Voltage press SELECT button momentarily to select DC AC or DC AC The new settings will be saved automatically to the non volatile memory as power up default In DCV and DCmV press 500000 button momentarily to toggle between 4 4 5 digits and 5 4 5 digits readings In voltage or current functions press the Hz push button momentarily to activate or to exit Line Level Frequency measuring function Line Level Frequency measuring function is designed especially for noisy electrical high voltage signals Note In dBm function power up default reference impedance will be displayed for 1 second before displaying the dBm readings Press dBm Q RANGE button momentary to select different reference impedan
7. current rating of the protection fuse Do not attempt a current measurement to any circuit where the open circuit voltage is above the protection fuse voltage rating Suspected open circuit voltage should be checked with voltage functions Never attempt a voltage measurement with the test lead inserted into the nA mA or A input jack Only replace the blown fuse with the proper rating as specified in this manual CAUTION Disconnect the test leads from the test points before changing functions Always set the instrument to the hightest range and work downward for an unknown value when using manual ranging mode 2 INTERNATIONAL ELECTRICAL SYMBOLS AX Caution Referto the explanation in tris Manual re rss AC Alternating Current Le DC Direct Current CENELEC Directives The instruments conform to CENELEC Low voltage directive 2006 95 EC and Electromagnetic compatibility directive 2004 108 EC 3 GENERAL SPECIFICATIONS Display 4 4 5 digits 50 000 counts Selectable stable mode 5 4 5 digits 500 000counts for DC Voltage amp 6 digits 999 999 counts for Hz Polarity Automatic Update Rate 4 4 5 digits fast mode 5 per second nominal 5 4 5 digits stable mode 1 25 per second nominal 42 Segments Bar graph 60 per second max Operating Temperature 0 C to 45 C Relative Humidity Max relative humidity 80 for temperature up to 31 C decreasing linearly to 50 relative humidity at 45 C Pollut
8. CAL SYMBOL GENERAL SPECIFICATION ELECTRICAL SPECIFICATION PRODUCT DESCRIPTION OPERATION MAINTENANCE TEST CERTIFICATE LIMITED WARRAN DP cscs seseceacectatecccssetteviozseractees 36 1 SAFETY This manual contains information and warnings that must be followed for operating the instrument safely and maintaining the instrument in a safe operating condition If the instrument is used in a manner not specified by the manufacturer the protection provided by the instrument may be impaired The meter 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 amp CAN CSA C22 2 No 61010 1 0 92 to Category III 1000V AC amp DC amp Category IV 600V AC amp DC KM857 Terminals to COM ratings V Category IlI 1000V AC amp DC amp Category IV 600V AC amp DC A mAuwA Category IIl and Category IV 600V AC and 300V DC KM859CF Terminals to COM ratings V A mApA Category IlI 1000V AC amp DC and Category IV 600V AC amp DC Per IEC61010 1 2nd Ed 2001 Measurement Category Measurement Category IV CAT IV is for measure ments 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 Ill CAT Ill is for measure ments performed in the building installation Ex
9. amples are measurements on distribution boards circuit breakers wiring including cables bus bars junction boxes switches socket outlets in the fixed installation and equipment for industrial use and some other equipment for example stationary motors with permanent connection to the fixed installation Measurement Category Il CAT Il is for measure ments performed on circuits directly connected to the low voltage installation Examples are measure ments on household appliances portable tools and similar equipment TERMS IN THIS MANUAL WARNING identifies conditions and actions that could result in serious injury or even death to the user CAUTION identifies conditions and actions that could cause damage or malfunction in the instrument 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 60V DC 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 Do not measure any current that exceeds the
10. anual ranging mode and the meter will remain in the range it was in the LCD annunciator turns off Press the button momentarily again to step through the ranges Press and hold the button for 1 second or more to resume auto ranging mode Note Manual ranging mode feature is not available in Hz function Hold fl The hold function freezes the display for later view Press the HOLDE button momentarily to activate or to exit the hold function Set Beeper Off Press the Hz button while turning the meter on to disable the push button operating beeper feature However the continuity and Jack Beep input warning features remain Beep Jack Input Warning The meter beeps as well as displays InErr to warn the user against possible damage to the meter due to improper connections to the uA mA or A input jacks when other function like voltage function is selected Intelligent Auto Power Off APO The Intelligent Auto Power Off APO mode turns the meter off automatically to extend battery life after approximately 17 minutes of no activities Activities are specified as 1 Rotary switch or push button operations and 2 Significant measuring readings of above 10 of range or non OL Q readings In other words the meter will intelligently avoid entering the APO mode when it is under normal measurements To wake up the meter from APO press the RECORD button momentarily or turn the rotary switch to the OFF position and then turn
11. back on again Always turn the rotary switch to the OFF position when the meter is not in use Disabling Auto Power Off Press the RANGE button while turning the meter on to disable the Auto Power Off APO feature 7 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 Install only the same type of fuse or equivalent Calibration Periodic calibration at intervals of one year is recommended to maintain meter accuracy Acuracy is specified for a period of one year after calibration If self diagnostic message rE O is being displayed while powering on the meter is re organizing internal parameters Do not switch off the meter then and it will be back to normal measurement shortly However if self diagnostic message C_Er is being displayed while powering on some meter ranges might be largely out of specifications To avoid mis leading measurements stop using the meter and send it for re calibration Refer to the LIMITED WARRANTY section for obtaining warranty or repairing service Trouble Shooting If the instrument fails to operate check battery fuses 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 cau
12. ce of 4 8 16 32 50 75 93 110 125 135 150 200 250 300 500 600 800 900 1000 up to 12008 The new impedance value will be saved automatically to the non volatile memory as power up default Note Line Level Frequency measuring function input sensitivity varies automatically with voltage or current function range selected The lower the measuring range the higher the sensitivity That is mV function has the highest and the 1000V range has the lowest as in voltage function ranges It is recommended to first measure the signal voltage or current level then activate the Hz function in that voltage or current range to automatically get the most approprite trigger level When activated from voltage function you can also press the RANGE button momentarily to select another trigger level range manually The analog bargraph pointer will point at the selected trigger level range scale 1 2 3 or 4 If the Hz reading is unstable select lower sensitivity to avoid electrical noise If the reading shows zero select higher sensitivity JU Hz Logic Level Frequency and Duty Cycle functions Press SELECT button momentarily to toggle between Hz and duty cycle readings The new setting will be saved automatically to the non volatile memory as power up default Press 500000 button momentarily to toggle between 5 full digits and 6 full digits Hz readings Note Unlike the Line Level Freq
13. ed 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 alow 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 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 If you are measuring current in industrial environment you can easily exceed those ratings The best way to avoid damage is to use aclamp 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 TABLE OF CONTENTS TITLE PAGE SAFET oepa ae ees sec satan geen ae EEE EEE 1 CAUTION amp ELECTRI
14. inutes cool down interval minutes cool down interval DC LOOP CURRENT 4 20MA 5 PRODUCT DESCRIPTION 4mA 0 zero Panel Illustration 20mA 100 span Resolution 0 01 Accuracy 25d fF AMINE D al LILILS pa pa A Sau e _ Adie Crest mode Instantaneous Peak Hold Accuracy Specified accuracy 100 digits for aBm 0 T T 4 changes gt 0 8ms in duration HZ LINE LEVEL FREQUENCY Function Sensitivity Range Sine RMS 500mV 100mV 10Hz 200kHz Range 10Hz 200kHz 10Hz 100kHz 500V 100V 10Hz 100kHz 1000V 900V 10Hz 10kHz Accuracy 0 02 4d JIU HZ LOGIC LEVEL FREQUENCY 5 4 5 digits 500000 counts LCD display Push buttons for special functions amp features Range peers Selector to turn the Power On or Off and Select a function Sensitivity 2 5Vp square wave Input jack for 10A 20A for 30sec current and for T2 function DUTY CYCLE Input Jack for all functions EXCEPT current ange Son Common Ground reference Input Jack for 0 1 99 99 3d kHz 2d all functions EXCEPT T2 function Input Frequency 5Hz 500 kHz 5V Logic Family Input Jack for milli amp micro amp and T2 functions Average sensing RMS calibrated RMS Root Mean Square is the term used to describe the effective or equivalent DC value of an AC signal Most digital multimeters use average sensing RMS calibrated technique to measure RMS values of AC signals This technique is
15. ion degree 2 Storage Temperature 20 C to 60 C lt 80 R H with battery removed Altitude Operating below 2000m Temperature Coefficient nominal 0 1 x specified accuracy C 0 C 18 C or 28 C 40 C or otherwise specified Sensing AC AC DC True RMS Safety Double insulation per IEC61010 1 2nd Ed EN61010 1 2nd Ed UL61010 1 2nd Ed amp CAN CSA C22 2 No 61010 1 0 92 to Category III 1000V AC amp DC and Category IV 600V AC amp DC KM857 Terminals to COM ratings V Category III 1000V AC amp DC amp Category IV 600V AC amp DC A mAuA Category Ill and Category IV 600V AC and 300V DC KM859CF Terminals to COM ratings V A mAuA Category Ill 1000V AC amp DC and Category IV 600V AC amp DC Overload Protections KM 857 uA amp mA 1A 600V IR 10KA or better F Fuse A 10A 600V IR 100kA or better F Fuse V 1050Vrms 1450V peak mV Q amp Others 600V DC amp V AC rms KM 859CF uA amp mA 0 44A 1000V IR 10kA or better F Fuse A 11A 1000V IR 20kA or better F Fuse V mV Q amp Others 1050Vrms 1450V peak Transient Protection 8kV 1 2 50uS surge 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 100Digits Perf
16. led automatically in this mode CREST capture Instantaneous Peak Hold mode Press CREST button momentarily to activate CREST mode to capture voltage or current signal duration as short as 0 8ms This mode is available in DC AC DC AC modes of voltage and current functions The LCD annunciators C amp MAX turn on The meter beeps when new maximum or minimum reading is updated Press the button momentarily to read throughout the Maximum MAX Minimum MIN and Maximum minus Minimum MAX MIN readings Press the button for 1 second or more to exit CREST capture mode Auto Power Off feature will be disabled automatically in this mode A Relative Zero mode Relative Zero allows the user to offset the meter consecutive measurements with the displaying reading as the reference value Practically MAX MIN recording feature readings can also be set as relative reference value Press the A button momentarily to activate and to exit Relative Zero mode 500000 high resolution stable mode In DC voltage and frequency functions press the 500000 button momentarily to toggle between the 4 4 5 digits fast mode and the 5 4 5 digits high resolution stable mode Backlighted display Press the SELECT button for 1 second or more to turn on or off the display backlight function The backlight will also be turned off automatically after 30 seconds to extend battery life Manual or Auto ranging Press the RANGE button momentarily to select m
17. ormance above 3V m is not specified Power Supply Single 9V battery Power Consumption 6mA typical Low Battery Below approx 7V APO Timing Idle for 17 minutes APO Consumption 55uA typical for KM 857 30uA typical for KM859CF Dimension 186 L x 87 W x 35 5 H mm 198 L x97 W x55 H mm with holster Weight 390gm 500gm with holster Accessories Test leads pair Holster Battery installed user Manual Bkp60 banana plug K type Thermocouple x 1 KM 859CF Optional Accessories BRUA 85Xa PC interface Kit BC 85Xa Rs232 optical adapter cable BS85X software CD BUA 2303 USB to serial adaptor Bkb32 banana pins to K type socket plug adapter Special Features Record MAX MIN MAX MIN readings Crest instantaneous Peak hold MAX MIN MAX MIN readings Relative zero mode 500 000 counts high resolution stable reading mode Backlighted display dBm readings 11 T2 differential temperature readings KM 859CF only 4 20mMA loop current readings High noise rejection filtered Line Level Frequency mode Data Hold Audible amp visible input warning 4 ELECTRICAL SPECIFICATIONS Accuracy is reading digits number of digits or otherwise specified at 23 C 5 C amp less than 75 relative humidity True RMS voltage amp current accuracies are specified from 5 to 100 of range or otherwise specified Maximum Crest Factor lt 5 1 at full scale amp lt 10 1 at half scale and with frequence component
18. ows OL if the diode is good Any other readings indicate the diode is resistive or shorted defective 4 20mMA Warning 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 PC COMM Computer interface capabilities The instrument equips with an optical isolated interface port at the meter back for data communication Optional purchase PC interface kit BRUA 85Xa BC 85Xa RS232C optical adapter cable BS85X software CD BUA 2303 USB to Serial adaptor is required to connect the meter to the PC computer The BS85x Data Recording System software equips with a digital meter an analog meter a comparator meter and a Data Graphical recorder display Refer to the README file in the interface kit for further details MAX MIN RECORDING mode Press REC button momentarily to activate MAX MIN recording mode The LCD annunciators R and MAX MIN turn on The meter beeps when new maximum or minimum reading is updated Press the button momentarily to read throughout the Maximum MAX Minimum MIN and Maximum minus Minimum MAX MIN readings Press the button for 1 second or more to exit MAX MIN recording mode Auto Power Off feature will be disab
19. s within the specified frequency bandwidth for non sinusoidal waveforms AC amp AC DC VOLTAGE Range KM859CF KM857 Accuracy 500 00mV 5 0000V 1 5 60d 50 000V Unspec d 500 00V Unspec d 1000 0V ABHZ 300Hz O 500 00mV 5 0 0 8 20d 8 60d 4000 0V 0 4 40d 300HZ 5kHz 300Hz 1kHz 500 00mV 0 3 10d 0 8 40d 0 4 40d 2 0 60d 0 8 40d 1000 0V 300Hz 1kHz 1 0 40d 500 00mV 0 5 20d 1dB 50 000V 2 5 40d 5 0000V 50 000V 4 0 400 Unspec d 500 00V Tee 1000 0V From 5 to 10 of range accuracy of reading or in dB 80d From 5 to 10 of range accuracy of reading or in dB 180d From 10 to 15 of range accuracy of reading or in dB 100d CMRR gt 80dB DC to 60Hz Rs 1kQ Input Impedance 10M9 30pF nominal 80pF nominal for 500mV range Residual reading less than 50 digits with test leads shorted dBm At 600Q 11 76dBm to 54 25dBm Accuracy 0 25dB 2d 40Hz 20kHz Input Impedance 10MQ 30pF nominal Selectable reference impedance of 4 8 16 32 50 75 93 110 125 135 150 200 250 300 500 600 800 900 1000 12002 DC VOLTAGE KM859CF KM857 P Accuracy 0 1 2d NMRR gt 60dB 50 60Hz CMRR gt 120dB DC 50 60Hz Rs 1kQ Input Impedance 10MQ 30pF nominal 80pF nominal for 500mV range RESISTANCE Range KM859CF KM857 es e 500 002 0 07 10d 5 0000kQ 0 1 6d 50 000kQ 0 07 2d
20. sed by lighting or switching surge to the system by accident or abnormal conditions of operation the series fusible resistors will 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 The series fusible resistors and the spark gaps should then be replaced by qualified technician Refer to the LIMITED WARRANTY section for obtaining warranty or repairing service Cleaning and Storage 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 battery and store it separately Battery and Fuse replacement Battery use 9V alkaline battery KM857 Fuse FS1 for uAmA current input 1A 600V IR 10kA or better F fuse Fuse FS2 for A current input 10A 600V IR100kA or better F fuse KM859CF Fuse FS1 for uAmA current input 0 44A 1000V IR 10kA or better F fuse Fuse FS2 for A current input 11A 1000V IR 20kA or better F fuse Battery replacement for models with 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 Fuse replacement and also Battery replacement for splash proof version without battery access door Loosen the 4 screws from the case bottom
21. to obtain the average value by rectifying and filtering the AC signal The average value is then scaled upward calibrated to read the RMS value of a sine wave In measuring pure sinusoidal waveforms this technique is fast accurate and cost effective Inmeasuring non sinusoidal waveforms however significant errors can be introduced because of different scaling factors relating average to RMS values AC True RMS AC True RMS normally refers as True RMS identifies a DMM function that is AC coupled and responds accurately only to the effective RMS AC component value regardless of the waveforms However DC component plays an important role in the distorted non symmetrical waveforms and will also be of interest sometimes A full wave rectified sine waveform is a good example and the AC true RMS function will only give the AC component reading which is at 43 6 of the total effective DC AC RMS reading DC AC True RMS DC AC True RMS calculates both of the AC and DC components given by the expression DC AC rms When making measurement and can respond accurately to the total effective RMS value regardless of the waveform Distorted waveforms with the presence of DC components and harmonics may cause 1 Overheated transformers generators and motors to burn out faster than normal 2 Circuit breakers to trip prematurely 3 Fuses to blow 4 Neutrals to overheat due to the triplen harmonics present on the neutral
22. ton momentarily to toggle between 4 Capacitance and F Diode test function The new setting will be saved auto matically to the non volatile memory as power up default CAUTION Discharge capacitors before making any measurement Large value capacitors should be discharged through an appropriate resistance load uA mA A and 4 20mA Current functions Insert the red test lead into the correct uA mA or A input jack Press SELECT button momentarily to select DC AC or DC AC The new settings will be saved automatically to the non volatile memory as power up default In DC mA function neither in AC nor in DC AC press and hold the 4 20mA Hz button for 1 second or more to display the current digital data in terms of loop current percentage value It is set at 4mA 0 zero and 20mA 100 span with 0 01 high resolution which virtually extends the meters capability to test and regulate the externally powered loop current in the industrial process control applications The analog bar graph remains showing the mA current value to alert the Note 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 baised across the diode The digital display sh
23. uency measuring function as previously stated this Logic Level Frequency function is set only at the highest input sensitivity to measure digital type electronic signals T1 T2 Dual Channels Temperature function KM859CF only Press SELECT button momentarily to toggle between C and F readings and the new setting will be saved automatically in the non volatile memory as power up default Press T1 T2 RANGE button momentarily to select T1 T2 or T1 T2 readings insert the banana plug K type temperature bead probe stadard accessory x 1 with correct polarities Dual channels T1 T2 readings require 2 probes You can also use a plug adapter Optional purchase with banana pins to K type socket to adapt other standard K type mini plug temperature probes Q RESISTANCE CONTINUITY FUNCTIONS Press SELECT button momentarily to toggle between and Continuity function The new setting will be saved automatically to the non volatile memory as power up default Continuity function is convenient for checking wiring connections and operation of switched A continuous beep tone indicates a complete wire CAUTION Using resistance or continuity function in a live circuit will produce false results and may damage the meter In many cases the suspected component must be disconnected from the circuit to obtain an accurate reading dF CAPACITANCE gt DIODE TEST FUNCTION Press SELECT but
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