BM857 BM859CF
Contents
1. ED _ 4 20 4 20 Optical 5232 la mA uA 1000V CAT 600V DC AC 100kHz TRMS DMM USER S MANUAL 857 859 BRIGHT PEOPLE S CHOICE 1 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 is protected against the users by double insulation per EN61010 1 and IEC61010 1 2nd Edition 2001 to CAT 1000 amp CAT IV 600V The meter also meets UL3111 1 1994 and CSA 22 2 No 1010 1 92 to CAT 1000V 857 Terminals to COM ratings V Category 111 1000 Volts AC amp DC and Category IV 600 Volts AC amp DC Al mAuA Category Ill and Category IV 500 Volts AC and 300 Volts DC BM859CF Terminals to COM ratings VIA Category III 1000 Volts AC amp DC and Category IV 600 Volts AC amp DC Category and Category IV 600 Volts AC and 300 Volts DC Category IV safety standard for DMMs was first released in IEC61010 1 2nd Edition in year 2001 and was not adopted as an UL published standard at the time this manual was written Per IEC61010 1 2nd Ed 2001 Measurement Category OVERVOLTAGE C2. Screws 810CF18 Fuse replacement and also Battery replacement for splash proof version without battery access door Loosen the 4 screws from the case bottom 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 LIMITED WARRANTY BRYMEN 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 one year from the date of purchase BRYMEN s warranty does not apply to accessories fuses fusible resistors spark gaps batteries or any product which in BRYMEN 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 BRYMEN authorized agent or send the product with proof of purchase and description of the difficulty postage and insurance prepaid to BRYMEN TECHNOLOGY CORPORATION BRYMEN assumes no risk for damage in transit BRYMEN will at its option repair or replace the defective product free of charge However if BRYMEN determines that the failure was caused by misused altered neglected or damaged by accident or abnormal conditions of operation or
3. 5 4 5 digits readings In voltage or current functions press the 2 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 RANGE button momentary to select different reference impedance of 4 8 16 32 50 75 93 110 125 135 150 200 250 300 500 600 800 900 1000 up to 120002 The new impedance value will be saved automatically to the non volatile memory as power up default dBm N 850F03 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 appropriate 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 r
4. BC85X RS232C optical adapter cable BS85X RS232C software floppies is required to connect the meter to the PC computer The BS85X 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 13 MAX MIN RECORDING mode Press REC button momentarily to activate MAX MIN recording mode The LCD annunciators 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 disabled 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 Rel
5. 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 BRYMEN WILL NOT BE LIABLE FOR ANY SPECIAL INDIRECT INCIDENTAL OR CONSEQUENTIAL DAMAGES BRYMEN BRIGHT PEOPLE S CHOICE BRYMEN TECHNOLOGY CORPORATION TEL 886 2 2226 3396 FAX 886 2 2225 0025 http www brymen com ch PRINTED ON RECYCLABLE PAPER PLEASE RECYCLE COPYRIGHT MMIII Btc ALL RIGHTS RESERVED P N 7M1C 0191 A000 PRINTED IN TAIWAN
6. ATEGORY II Equipment of OVERVOLTAGE CATEGORY II is energy consuming equipment to be supplied from the fixed installation Note Examples include household office 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 2 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
7. 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 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 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 15 5 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 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 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 t
8. S 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 rms when making measurement and can responds 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 Fuses to blow Neutrals to overheat due to the triplen harmonics present on the neutral Bus bars and electrical panels to vibrate 5 3 4 5 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 A DMM 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 DMM In reality complex waveforms noise and distorted waveforms contain much higher frequency spectrum than its fundamental 6 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 speci
9. ative 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 It will also be turned off automatically after 30 seconds to extend battery life Manual or Auto ranging Press the RANGE button momentarily to select manual 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 14 Hold The hold function freezes the display for later view Press the button momentarily to activate or to exit the hold function Set Beeper Off Press the 2 button while turning the meter on to disable the push button operating beeper feature However the continuity and Jack Beep input warning features remain Intelligent Auto Power Off APO The Intelligent Auto Power
10. eading is unstable select lower sensitivity to avoid electrical noise If the reading shows zero select higher sensitivity 8 Hz Logic Level Frequency 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 Frequency measuring function as previously stated this Logic Level Frequency function is set only at the highest input sensitivity to measure digital type electronic signals 9 T1 T2 Dual Channels Temperature function 859 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 1 2 RANGE button momentarily to select 1 2 or T1 T2 readings 850F05 C F Note Insert the banana plug K type temperature bead probe Bkp60 standard accessory 1 with correct polarities Dual channels 1 2 readings require 2 probes You can also use a plug adapter Bkb32 Optional purchase with banana pins to K type socket to adapt other standard K type mini plug temperature probes 10 Resistance Continuity functions Press SELECT button momentarily to toggle between Q and Continuity functions The
11. fication of gt 60dB at 50 and 60Hz which is a good and definite ability to reject the effect of AC noise when making DC measurements 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 that can cause digit rattle or offset in voltage measurements This series has a CMRR specifications of gt 90dB at DC to 60Hz in ACV function and gt 120dB at DC 50 and 60Hz in DCV function If neither NMRR nor CMRR specification is specified a DMM s performance will be uncertain Analog 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 4 OPERATION AC Voltage DC Voltage DC AC Voltage amp 2 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
12. instrument If any defects are found replace them immediately Do not measure any current that exceeds the 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 uA 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 when using manual ranging mode INTERNATIONAL ELECTRICAL SYMBOLS Caution Refer to the explanation in this Manual Caution Risk of electric shock Earth Ground Double Insulation or Reinforced insulation Fuse AC Alternating Current DC Direct Current forsee 2 CENELEC Directives The instruments conform to CENELEC Low voltage directive 73 23 EEC and Electromagnetic compatibility directive 89 336 EEC 3 PRODUCT DESCRIPTION Panel Illustration pa A 4MkQHzdBmuVAnF 0 1 2 3 4 5 TETTEI rr es A ED amp 4 20 e 850F 01 1 5 4 5 digits 500000 counts LCD display 2 Push buttons for special functions amp featu
13. 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 switches A continuous beep tone indicates a complete wire Q 850F06 gt CA dBm N T 2 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 11 Capacitance gt Diode test function Press SELECT button momentarily to toggle between Capacitance and gt F Diode test functions The new setting will be saved automatically 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 850F07 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 12 mA A and 4 20 Current f
14. o 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 16 9V alkaline battery NEDA1604A JIS6AM6 or IEC6LF22 857 Fuse FS1 for AmA current input 0 63A 500V IR 200 F fuse Fuse FS2 for A current input 12 5A 500V IR 20 F fuse BM859CF Fuse FS1 for AmA current input 1A 600V IR 100 F fuse Fuse FS2 for A current input 15A 1kV IR 10 or 11A 1kV IR 20 F fuse The 0 44A fuse is also recommended since it has a Time Current Characteristic Curves projection of approaching infinity at 0 5A It can also be loaded way beyond 1000 seconds at 1A and has a fast acting characteristic of below 0 01 second at beyond 2 5A This protection characteristic also matches our meter nicely 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
15. res 3 Selector to turn the Power On or Off and Select a function 4 Input Jack for 10A 20A for 30sec current and for T2 function 5 Input Jack for all functions EXCEPT current A and 2 functions 6 Common Ground reference Input Jack for all functions EXCEPT 2 function 7 Input Jack for milli amp micro amp and 2 functions 5 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 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 waveform this technique is fast accurate and cost effective In measuring 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 RM
16. unctions 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 2 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 the mA current value to alert the user A 850F08 4 20 a EE ERT Ceca reste CA 50000 dBm A TrTe 4 20mA RANGE Hz Do 172 Hz Oo MAL 4 NA OFF Warning When measuring 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 RS232C PC computer interface capabilities The instrument equips with an optical isolated interface port at the meter back for data communication Optional purchase PC interface kit BR85X
Download Pdf Manuals
Related Search