select - Amprobe
Contents
1. 3 4D Data 5 per second nominal 4 3 4D Data 1 25 per second nominal 43 Segments Bar graph 128 per second max Low Battery The indicator appears when the battery voltage drops below approx 5 8V Operating Temperature 32F to 122F 0 to 50 Storage Temperature 4F to 140 20 to 60 80 R H with battery removed Relative Humidity 80 at32F to 95 0 to 35 70 at 95F to 122F 35 to 50 Temperature Coefficient Nominal 0 15 x specified accuracy 23F 65F or 83F 122F O C 180 or28 50 or otherwise specified Altitude Operating below 2000m Power Supply Single Alkaline 9V battery NEDA1604A J IS6AM6 or IEC6LF22 APO Timing Idle for 4 5 minutes APO Consumption 20LUA typical Sensing True RMS conversion Power Consumption 12 mA typical Weight 390 gm 500 gm with holster Dimension L186mm X W87mm X H35 5mm L198mm X W97mm X H55mm with holster Accessories RS232 adapter cable RS 232 software floppies Test leads pair holster battery installed and user s manual Safety The meter meets the requirements for double insulation to IEC61010 1 1995 EN61010 1 1995 UL3111 1 6 1994 CSA C22 2 NO 1010 1 92 to terminals V R Category IV 600V ac and dc and Category Ill 1000V dc and 750V ac UA mA Category Ill 500V ac and Category Il 300V dc A Category Ill 600V ac and Category II 300V dc Transient protection 8kV 1 2 50Us surge E M C Meets EN55022 1994 A1 1995 Class B and EN502. button while turning the meter on to disable the Auto Power Off APO feature 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 Line filter frequency selection Press the 40000 button while turning the meter on to display the set frequency Press the SELECT button for 50Hz or press the STORE button for 60Hz to cope with your power line frequency Then press the RANGE button to store the selected frequency Selecting the appropriate line filter frequency can maximize the meter s noise rejection ability Set Beeper Off Press the SELECT button while turning the meter on to disable the Beeper feature This does not disable the input warning beeper 5 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 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 Trouble Shooting If the instrument fails to operate check battery fuses leads etc and replace as necessary Double check
3. measurement where the open circuit voltage Is above the protection fuse voltage rating Suspected open circuit voltage can be checked with voltage functions Never attempt a voltage measurement with the test lead inserted into the wA 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 highest range and work downward for an unknown value if you are using manual ranging mode INTERNATIONAL ELECTRICAL SYMBOLS A Caution Refer to the explanation in this Manual Caution Risk of electric shock Earth Ground 0 Double Insulation or Reinforced insulation Fuse 2 ELECTROMAGNETIC COMPATIBILITY EMC The instrument meets EN55022 1994 A1 1995 Class B and EN50082 1 1992 3 PRODUCT DESCRIPTION Panel Illustration 83R501 1 4 3 4 digits 40000 counts LCD display re oe so we ee SOO oe 24998 Pa cate Vao O 2 Push buttons for special 20 10 lt 4 20 30 akakaa aah a bikia aaa i functions amp features 3 Selector to turn the P ower On or Off and Select a function 4 Input ack for 10A 20A for 30sec current function 5 Input ack for all functions EXCEPT current uA mA A functions 6 Common Ground reference Input ack for all functions 7 Input ack for mill amp and micro amp current functions Analog bar graph The analo
4. 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 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 Battery and Fuse replacement The meter uses a single standard 9V alkaline battery NEDA1604A J IS6AM6 IEC6LF 22 a 500V 0 63A IR 200kA fast acting F fuse FS 1 for wA mA current input and a 600V 15A IR 100kA fast acting F fuse FS 2 for A current input 83RS19 Loosen the screws from the case bottom Liftthe end of the case bottom nearest the input jacks until it unsnaps from the case top Replace the battery and the blown fuse s 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 6 SPECIFICATIONS GENERAL SPECIFICATIONS Display 3 3 4 digits 4000 counts or 4 3 4 digits 40000 counts selectable 5 digits 99999 counts for Hz and 4 digits 9999 counts dual display LCD Polarity Automatic Update Rate 3
5. 082 1 1992 In an RF field of 3V m Capacitance function is not specified Other function ranges Total Accuracy Specified Accuracy 30 digits Performance above 3V m is not specified ELECTRICAL SPECIFICATIONS Accuracy is reading digits number of digits or otherwise specified at 73 F 41F 23 5 amp less than 75 R H True RMS ACV DC AC V amp ACA accuracies are specified from 5 to 100 of range or otherwise specified Maximum Crest Factor lt 3 1 at full scale amp lt 6 1 at half scale and with frequency component within the specified frequency bandwidth for non sinusoidal waveforms DC Voltage RANGE 05 60 400 0mV 4 000V 40 00V 400 0V 1000V 0 08 1d NMRR gt 60dB 50 60Hz CMRR gt 120dB DC 50 60Hz Rs 1kQ2 Input Impedance 10M2 30pF nominal 100pF nominal for 40mV amp 400mV ranges Temperature coefficient 0 1 X Specified accuracy 23F 65F or 83F 122F o 18 or28 O 500 Overload protection 780 Vrms 1000Vpeak 600 VDC VAC ms for 40mV amp 400mV ranges DC Adapter 10 counts per 1 mVDC Accuracy 0 08 1d Input Impedance 1000M amp 2 70pF nominal Temperature coefficient 0 05 X Specified accuracy 23F 65F or83F 122F O 180 or28 O 500 Overload protection 600VDC VAC rms Accuracy 4 000V 40 00V 400 0V 750V 0 8 8d O 1kkz 4 000V 40 00V 400 0V 1 0 8d 750V 1 2 8d 1kHz 5kHz 4 000V 40 00V 400 0V 1 2 8d 75
6. 0V 3 2 8d 5kHz 20kHz 4 000V 40 00V 400 0V 2 0 8d m CMRR gt 60dB DC to 60Hz Rs 1kQ2 Input Impedance 10M2 30pF nominal DC Coupled True RMS S pecified from 10 to 100 of range Update Rate 1 6 per second nominal Overload protection 780 Vrms 1000Vpeak AC Adapter 10 counts per 1 mVAC Accuracy Same as AC 400 0mV range Input Impedance 1000M amp 2 70pF nominal Temperature coefficient 0 1 X Specified accuracy 23F 65F or 83F 122F O 18 or28 500 Overload protection 600VDC VAC rms AC Voltage 50Hz 60Hz 400 0mV 4 000V 40 00V 400 0V 0 5 3d 750V onon 4 000V 40 00V 400 0V no ooon 4 000V 40 00V 400 0V no onon 4 000V 40 00V 400 0V no 20kHz 50kHz 400 0mV 2 5 6 dk CMRR gt 60dB DC to 60Hz Rs 1kQ2 Input Impedance 10M2 30pF nominal 100pF nominal for 400mV range AC Coupled True RMS Specified from 10 to 100 of range S necified from 15 to 100 of range A dd 30000 reading counts below 38 of range Overload protection 780 Vrms 1000Vpeak 600 VDC VAC ms for 400mV range AC Current RANGE burden Voltage 50Hz 60Hz sopa oS 4000UA 0 8 43d 0 15mV LLA 4000s 0 15mv pUA woop soom 000m 4 008 10004 mooua unspec Un nova 1 2 3d 0 03V A AC Coupled True RMS Specified from 10 to 100 of range 10A continuous 20A for 30 seconds maximum 5 minutes cool down interval mA LA Overload Pr
7. AC V amp 83RS04 Hold The hold function freezes the display for later view Press the HOLD button momentarily to activate and to exit the hold function HOLDA 8 amp RSi4 DC AC AC Hz mV functions Defaults at DC Press SELECT button momentarily to selectAC Press SELECT button momentarily again to selectAC Hz RSOS 83 ACmV Hz DC AC AC Hz Adapter functions The operation of Adapter function is similar to the mV function Defaults at DC Press SELECT button momentarily to select AC Press SELECT button momentarily again to select AC Hz Adapter function is of extra high input impedance up to 1000MQ and there is no decimal point on the digital display It can cope with most voltage output sensors transducers with the highest sensitivity and the least current drain Hz Hz functions Defaults at Hz Press SELECT button momentarily to select Hz 83RS06 t Hz Note Unlike the AC Hz function this high resolution Hz function is set at the highest input sensitivity to measure digital type electronic signals Backlighted display Press the SELECT button for 1 second or more to turn on and off the display backlight function The backlight will also be turned off automatically after 42 seconds to extend battery life Q Resistance nS GQ Conductance Continuity functions Default at Q Press SELECT button momentarily to select nS GQ Conductance for resistance measurement beyond 40MQ Press SELECT bu
8. and laboratory appliances OVERVOLTAGE CATEGORY III Equipment of OVERVOLTAGE CATEGORY III is equipment in fixed installations Note Examples include switches in the fixed installation and some equipment for industrial use with permanent connection to the fixed installation OVERVOLTAGE CATEGORY IV Equipment of OVERVOLTAGE CATEGORY IV is for use at the origin of the installation Note Examples include electricity meters and primary over current protection 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 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 Do not measure any circuit that draws more than the current rating of the protection fuse Do not attempt a current
9. d as the relative reading to the reference value Practically all displaying readings can be set as the reference value including MAX MIN AVG readings of RECORD amp SORT features Press the 4 U button momentarily again to show the Relative reading in terms of percentage change The bar graph will use the reference value as the center zero point and indicates the percentage changes in auto ranging zoom mode Press the 4 U button momentarily again to show the Relative reading in terms of per unit U The reference value is considered to be one base unit The meter consecutive measurements will then be displayed as the ratio to the base unit Press and hold the 4 U button for one second or more to exit AUNIT 83RS18 Auto Power Off APO The Auto Power Off APO mode turns the meter off automatically to extend battery life after approximately 4 5 minutes of no activities Activities are specified as 1 Rotary Switch or push button operations and 2 Significant measuring data readings of above 10 of range That is the meter will intelligently avoid entering the APO mode when it is under normal measurements To wake up the meter from APO turn the rotary switch to an adjacent position Note 1 Always turn the rotary switch to the OFF position when the meter is not in use 2 For maintenance purpose press the RANGE button while turning the meter on to Shorten the APO timing to 5 seconds Disabling Auto Power Off Press the 4000
10. ements CMRR Common 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 which can cause digit rattle or offset in voltage measurements This series has a CMRR specifications of 60dB at DC to 60Hz in ACV function and 120dB at DC 50 and 60Hz in DCV function If neither NMRR nor CMRR specification is specified a DMM s performance will be uncertain 4 OPERATION ACV ACV Hz amp dBm Hz functions Defaults at ACV Press SELECT button momentarily to select ACV Hz Press SELECT button momentarily again to select dBm Hz Input sensitivity for Hz varies automatically with voltage range selected in ACV Hz function It is designed especially ACV Hz dBm Hz SRS for measuring the frequency of high voltage noisy electrical signals Note Default Reference impedance 600Q will be displayed for 2 seconds before displaying the dBm Hz readings Press dBm Q RANGE button momentary to select different reference impedance from 4 8 16 32 50 75 93 110 125 135 150 200 250 300 500 600 800 900 1000 up to 1200Q Impedance values will again be displayed for 2 seconds before displaying the dBm Hz readings dBm 0 dBmt Hz RSK DCV DC AC V functions Defaults at DC Press SELECT button momentarily to select DC AC Analog bar graph will be disabled in the DC AC mode DC
11. g 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 DC AC True RMS DC AC True RMS is a term which identifies a DMM that responds accurately to the total effective RMS value 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 1 Overheated transformers generators and motors to burn out faster than normal 2 Circuit breakers to trio prematurely Fuses to blow Neutrals to overheat due to the triplen harmonics present on the neutral Bus bars and electrical panels to vibrate lt x gt 3 4 5 Crest Factor Crest Factor is the ratio of the Crest instantaneous peak value to the True RMS value and is commonly used to define the dynamic range of a True RMS DMM A pure sinusoidal waveform has a Crest Factor of 1 4 A badly distorted sinusoidal waveform normally has a much higher Crest Factor NMRR Normal Mode Rejection Ratio NMRR is the DMM s ability to reject unwanted AC noise effect which can cause inaccurate DC measurements NMRR is typically specified in terms of dB decibel This product has a NMRR specification of 60dB at 50 and 60Hz which means a good ability to reject the effect of AC noise in DC measur
12. ho gage ao meus JBB ae USER S q pint M ANUAL Hmunf z Mkahz 20 10 29 gt 30 4200 Qiiiandiidniniinidadnhiidnaan nan dni idit AM9I1RS RECORD CREST SORTB oBm 2 RS o Optical RS232 9 O O meros MAX MAX JAA TET CAT A United Dominion Company 4 HEC FUSED AM 91RS A AMPROBE DG AC TRUE RMS DMM 1 SAFETY This manual contains information and wamings that must be followed for operating the meter safely and maintaining the meter in a safe operating condition If the meter is used in a manner not specified by the manufacturer the protection provided by the meter may be impaired The meter is intended only for indoor use The meter meets the requirements for double insulation to IEC61010 1 1995 EN61010 1 1995 UL3111 1 6 1994 CSA C22 2 NO 1010 1 92 to terminals V R Category IV 600V ac and dc and Category Ill L000V dc and 750V ac mA uA Category Ill 500V ac and Category Il 300V dc A Category Ill 600V ac and Category II 300V dc PER IEC61010 OVERVOLTAGE INSTALLATION CATEGORY OVERVOLTAGE CATEGORY Equipment of OVERVOLTAGE CATEGORY is equipment for connection to circuits in which measures are taken to limit the transient overvoltages to an appropriate low level Note Examples include protected electronic circuits OVERVOLTAGE CATEGORY II Equipment of OVERVOLTAGE CATEGORY Il is energy consuming equipment to be supplied from the fixed installation Note Examples include household office
13. on for 1 second or more to resume auto ranging 3R513 Note Manual ranging feature is not available in Hz function SORT mode Press and hold the SORT button for one second or more to activate SORT mode The LCD annunciators S amp MAX MIN AVG turn on SORT only holds amp displays stable measurement and counts the event number by the secondary display The meter beeps when new stable reading is captured Press the button momentarily to read throughout the Maximum MAX Minimum MIN Maximum minus Minimum MAX MIN and Average AVG readings with event numbers out of the captured measurements Press the button for 1 second or more to exit Note 1 Auto Power Off feature will be disabled automatically in this mode Data Store amp Recall Press the STORE button momentarily to store the display for later view The LCD annunciator MEM will blink two times to confirm storage The memory will remain even in auto power mode until the rotary switch is switched to the OFF position Press the RECALL button momentarily to recall the stored display in any meter function for quick reference Press any other button EXCEPT RECALL momentarily to resume measurement 83R517 Relative modes Press the 4 U button momentarily to enter the Relative mode A This allows the meter to set the displaying reading as the reference value and offset zero the display The meter consecutive measurements will then be displaye
14. otection 0 63A 500V quick acting fuse Interrupt Rating 200kA A Overload Protection 15A 600V F quick acting fuse Interrupt Rating 100kA DC Current Dh H 0 8 60 0 03Vi4 0 030 mA LA Overload Protection 0 63A 500V quick acting fuse Interrupt Rating 200kA A Overload Protection 15A 600V quick acting fuse Interrupt Rating 100kA 10A continuous 20A for 30 seconds maximum 5 minutes cool down interval Frequency amp ACV in Dual Display 99 99Hz 999 9Hz 9 999kHz 20 00kHz 0 002 1d ACV 400mV 400V ranges sensitivities 5Hz 100 Hz 15 F S of AC range selected 100Hz 1kHz 20 F S of AC range selected 1kHz 10kHz 35 F S of AC range selected 10kHz 20kHz 50 F S of AC range selected ACV 750V range sensitivities 5Hz 100Hz 420VAC 100Hz 1kHz 550VAC Pulse Width 34s in this frequency range Update Rate 1 3 per second nominal Frequency RANGE 99 999Hz 999 99Hz 9 9999kHz 99 999kHz 0 002 3d 999 99kHz 4 0000MHz Sensitivity 5Hz 100kHz 200mV rms sinewave or 600mV p p 100kHz 500kHz 400mV rms sinewave or 1 2V p p 500kHz 2MHz 850mV rms sinewave or 2 6V p p 2MHz 4 MHz 1V rms sinewave or 3V p p Pulse Width 34s in this frequency range Update Rate 1 2 per second nominal Temperature coefficient 0 05 X Specified accuracy 23F 65F or 83F 122F o 18 or28 O 50 Operating input voltage 20VAC rm
15. r beeps when new maximum or minimum reading is updated Press the button momentarily to read throughout the Maximum MAX Minimum MIN Maximum minus Minimum MAX MIN and Average AVG readings Press the button for 1 second or more to exit Note 1 Auto Power Off feature will be disabled automatically in this mode 2 To retain the readings press the HOLD button to stop updating the measurement before disconnecting the test leads CREST capture mode Press and hold the CREST button for one second or more to activate CREST Instantaneous peak hold mode to capture voltage or current signal duration as short as 0 8ms This mode is available in DCV ACV DCA amp ACA 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 Note 1 Auto Power Off feature will be disabled automatically in this mode 2 To retain the readings press the HOLD button to stop updating the measurement before disconnecting the test leads Manual or Auto ranging Press the RANGE button momentarily to select manual ranging 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 butt
16. s Refer dual display frequency function for higher voltage frequency applications Overload protection 6 00VDC VAC rms Duty Cycle RANGE 0 1 99 9 0 5d kHz 2d Input Frequency 50Hz 250kHz 5V Logic Family with amp pulse width 24s Update Rate 1 2 per second nominal Overload protection 6 00VDC VAC rms Capacitance 4 00n 30 50 400 0nF 0 8 5d D8 3 20 3 50 5 4 000mF 5 0 5d 6 04 50 Accuracies with film capacitor or better S pecified from 10 to 100 of range Overload protection 600VDC VAC rms Ohms RANGE 40 000 0 2 6d 400 002 4 000kO2 40 00k02 400 0kQ2 0 15 2d 03 24 400 0nS 0 7 5d Open Circuit Voltage 1 3VDC 3VDC for 4062 amp 40002 ranges Temperature coefficient 0 1 X Specified accuracy 23F 65F or 83F 122F O 18 or28 500 Overload protection 600VDC VAC rms tt Diode Tester Test Current Typical Open Circuit Voltage 4 000V 0 8mA 3 5 VDC Overload Protection 600VDC VAC rms Audible Continuity Tester Audible threshold between 10 and 6002 Response time lt 150s Overload protection 600VDC VAC rms dBm At 60002 5 74dBm to 54 25dBm Accuracy 0 25dB 2d 40Hz 20kHz Selectable reference impedance of 4 8 16 32 50 75 93 110 125 135 150 200 250 300 500 600 800 900 1000 120002 Input Impedance 10M2 30pF nominal Update Rate 1 1 per second nominal Overload pro
17. se 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 RS232C PC computer interface capabilities The instrument equips with an optical isolated interface port at the meter back for data communication PC interface kit RS232C optical adapter cable RS232C software floppies is required to connect the meter to the PC computer The RS232C 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 40000 counts high resolution slow mode Press the 40000 button momentarily to enter the 4 3 4 digit high resolution slow mode The digital display updates 1 25 times per second nominal to give you smooth readings as well as the full accuracy of the meter Press the 4000 button momentarily to return to the power up default 3 3 4 digit fast mode The digital display updates 5 times per second nominal to give you the maximum measuring speed of the meter RECORD mode Press and hold the RECORD button for one second or more to activate recording mode with nominal 50ms sampling speed in most functions The LCD annunciators R amp MAX MIN AVG turn on The mete
18. tection 780Vrms 1000Vpeak RECORD mode Nominal Response for DC 50ms to 80 100ms to 99 Nominal Response for AC 50ms to 80 100ms to 95 Accuracy Specified accuracy 10 digits for changes _ 200ms in duration for DC 40 digits in AC Auto ranging buffer 1 5s except Cx amp AC DCV CREST mode Accuracy Specified accuracy 220 digits for changes _ 0 8ms in duration SORT mode Nominal sort rate 0 2s except Cx amp AC DCV Accuracy Specified accuracy 5 digits LIMITED WARRANTY AMPROBE warrants to the original product purchaser that each product it manufactures will be free from defects in material and workmanship under normal use and service within a period of three years from the date of purchase AMPROBE s warranty does not apply to accessories fuses fusible resistors spark gaps batteries or any product which in AMPROBE s opinion has been misused altered neglected or damaged by accident or abnormal conditions of operation or handling To obtain warranty service contact your nearest AMPROBE authorized agent or send the product with proof of purchase and description of the difficulty postage and insurance prepaid to AMPROBE INSTRUMENT AMPROBE assumes no risk for damage in transit AMPROBE will at its option repair or replace the defective product free of charge However if AMPROBE determines that the failure was caused by misused altered neglected or damaged by accident or abnormal condi
19. tions of operation or handling you will be billed for the repair THIS WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OR MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR USE AMPROBE WILL NOT BE LIABLE FOR ANY SPECIAL INDIRECT INCIDENTAL OR CONSEQUENTIAL DAMAGES TECHNICAL SUPPORT U S A 1 800 327 5060 TEL 305 423 7500 FAX 305 423 7554 A AMPROBE fmm A United Dominion Company Z PRINTED ON RECYCLABLE PAPER PLEASE RECYCLE COPYRIGHT MM BIC ALL RIGHTS RESERVED P N 7M1C 0042 A001
20. tton momentarily again to select Continuity function which is convenient for checking wiring connections and operation of switches A continuous beep tone indicates a complete wire n t GQ CAUTION Using resistance and continuity function in a live circuit will produce false results and may damage the instrument In many cases the suspected component must be disconnected from the circuit to obtain an accurate reading 4H Capacitance gt Diode test function Default at ir CAUTION Discharge capacitors before making any measurement Large value capacitors should be discharged through an appropriate resistance load Press SELECT button momentarily to select gt Diode test function gt 83RS508 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 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 uA mA and A Current functions Default at DC Press SELECT button momentarily to select AC Press SELECT button momentarily again to select AC Hz A will be selected automatically when the correct input jack is plugged in ACA Hz S3RSO09 Note When measuring a 3 pha
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