Range - brymen technology corporation
Contents
1. CMO GI MAXMIN Na HOO Cv SEHE gt x Hz EF SELECT HOLD MAX 0 6A MAX 8A HBC FUSED FUSED 7 0 CAT IV 600V 1kV CAT Il PC Comm USER S MANUAL BM251 BM252 BM255 BM257 BRYMEN BRIGHT PEOPLE S CHOICE 1 SAFETY 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 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 and CAN CSA C22 2 No 61010 1 0 92 to Category Il 1000V CAT III 600V and CAT IV 300V AC amp DC Terminals to COM measurement category V Category 11 1000V CAT III 600V and CAT IV 300V AC amp DC mALA Category 500Vac and 300Vdc Category IIl 600Vac and 300Vdc 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 m2. 255 amp 257 only Backlighted LCD model 255 amp 257 only Auto ranging Relative Zero mode Display Hold EF Detection NCV Interface capabilities with PC computer Input warning detection Accessories Test lead pair batteries installed user s manual BKP60 banana plug type K 13 thermocouple model 252 255 amp 257 only Optional purchase accessories USB interface kit BRUA 20X Magnetic hanger BMH 01 BKB32 banana plug to type K socket plug adaptor Electrical Specification Accuracy is given as of reading digits number of digits or otherwise specified 23 C 5 C and less than 75 R H True RMS model BM257 ACV 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 components fall within the meter specified frequency bandwidth for non sinusoidal waveforms AC Voltage DC Voltage RANGE Accuracy RANGE Accuracy 50Hz 400Hz 60 00mV 0 4 5d 60 00mV 600 0mV 600 0mV 6 000V 60 00V 600 0V 1 0 5d 6 000V 60 00V 600 0V 0 2 3d 1000V 1000V CMRR gt 60dB DC to 60Hz Rs 1kQ NMRR gt 60dB 50Hz 60Hz Input Impedance 10MQ 50 pF nominal CMRR gt 100dB DC 50Hz 60Hz Rs 1kQ Input Impedance 10MQ 50 pF nominal AutoCheck ACV model 255 amp 257 onl RANGE Accuracy AutoCheck DCV model 255 amp 257 onl 50Hz 60Hz RANGE Accuracy 1 000V 10
3. button momentarily or turn the rotary switch OFF and then back on Always turn the rotary switch to the OFF position when the meter is not in use 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 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 11 Calibration Periodic calibration at intervals of one year is recommended to maintain meter accuracy Accuracy is specified for a period of one year after calibration If self diagnostic message C 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 WARRANT Y 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 Trouble Shooting If the instrument fails to operate check battery fuses leads etc and replace as necessary Double check operating procedure as described i
4. voltage measurements test the voltage function on a known source such as line voltage to determine proper meter functioning Auto Check V Q Auto AutoCheck mode model 257 amp 255 only This innovative AutoCheck feature automatically selects measurement function of DCV ACV or Resistance Q based on the input via the test leads e With no input the meter displays Auto when it is ready eWith no voltage signal but a resistance below 10MQ nominal is present the meter displays the resistance value When the resistance is below Audible Threshold the meter further gives a continuity beep tone eWhen a signal above the voltage threshold of 1V DC or AC up to the rated 1000V is present the meter displays the voltage value in appropriate DC or AC whichever larger in peak magnitude Note Range Lock and Function Lock Feature When a measurement reading is being displayed in AutoCheck mode press the RANGE or SELECT button momentarily 1 time can lock the range or function it was in Press the button momentarily repeatedly to step through the ranges or functions As Hazardous Alert When making resistance measurements AutoCheck mode an unexpected display of voltage readings alerts you that the object under test is being energized Ghost voltage Buster Ghost voltages are unwanted stray signals co
5. 00V 1 4 5d 1 000V 1000V 1 3 3d AutoCheck Lo Z ACV Threshold AutoCheck Lo Z DCV Threshold gt 1V nominal gt 1 0 0 amp lt 1 0VDC nominal AutoCheck Lo Z ACV Input Impedance AutoCheck Lo Z DCV Input Impedance Initially approx 2 5kQ 120pF nominal Initially approx 2 5kQ 120pF nominal Impedance increases abruptly within a fraction Impedance increases abruptly within a fraction of a second as display voltage is above 50V of a second as display voltage is above 50V typical Ended up impedances vs display typical Ended up impedances vs display voltages typically are voltages typically are 15k 100V 15kQ 100V 100kQ 300V 100kQ 300V 250kQ 600V 250kQ 600V 375KQ 1000V 375KQ 1000V Ohm AutoCheck Ohm model 255 amp 257 onl RANGE Accuracy RANGE Accuracy 600 00 6 000K22 60 00KQ2 0 5 4d 000 00 60 00MQ 1 2 10d 0 600 0KQ Open Circuit Voltage 0 45VDC typical 6 000MO 0 7 4 Ohm Threshold 60 00MQ 1 2 44 lt 10 00MQ nominal Open Circuit Voltage 0 45VDC typical CREST Mode model 255 amp 257 only Accuracy Specified accuracy plus 150 digits for changes gt 5ms in duration RECORD Mode model 255 amp 257 only Accuracy Specified accuracy plus 100 digits for changes gt 100ms in duration Audible Continuity Tester Audible Threshold Between 100 and 800 Response time 32ms Capacitance model 252 255 amp 257 onl Accuracy 2 0 5
6. 28 40 C or otherwise specified Sensing Model 251 252 amp 255 Average sensing Model 257 True RMS sensing Pollution Degree 2 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 1000V CAT III 600V and CAT IV 300V AC amp DC Transient Protection 6 5kV 1 2 50 surge Terminals to COM Measurement Category V Category 11 1000V CAT III 600V and CAT IV 300V AC amp DC Category IIl 500Vac and 300Vdc Category 600Vac and 300Vdc 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 Overload Protection uA amp mA 0 63A 500Vac IR 50kA 500Vac A 10A 600Vac IR 100kA 600 V 1050 Vrms 1450 Vpeak AutoCheck mV Ohm amp others 600 Vrms Low Battery Below approx 2 3V Power Supply 1 5V AAA Size battery X 2 Power Consumption typical 3 5mA APO Consumption typical 101A APO Timing Idle for 34 minutes Dimension 161 80 50mm L W H With Holster Weight Approx 340 gm With Holster Special Features AutoCheck V amp model 255 amp 257 only Auto ranging MAX MIN Record model 255 amp 257 only Crest mode Peak Hold model
7. 4 1 5 54 3000 uF 2 0 54 Temperature model 252 255 amp 257 onl RANGE 50 1000 0 3 3d 58 F 1832 F 0 3 6d K type thermocouple range amp accuracy not included Lo RANGE ic Level Hz mV Function Sensitivity square wave 5 00 Hz 500 0 kHz 3 Vpeak 5 00 Hz 1 000 MHz Accuracy 0 03 2d Hz Line ACV DCV Current amp AutoCheck 5 Vpeak Sensitivity Accuracies with film capacitor or better j Sine RMS Range Diode Tester 10Hz 10kHz RANGE Accuracy 4 10Hz 50kHz 1 000V 1 0 3d 10Hz 50kHz Test Current 0 56mA typically Open Circuit Voltage 1 8VDC typically DC Current Burden Accuracy Voltage 0 5 54 0 5 3 0 10 mV uA 0 5 54 1 7 mVimA 05 3d m 1 2 6d 1 8 6d 0 03V A 1 continuous gt 8A to 15A for 30 sec max with 5 minutes cool down interval AC Current RANGE Burden Accuracy Voltage 50HZ 400HZ 600 0uA 6000 A 0 10 mV uA 1 0 3d 60 00mA 600 0mA 1 7 mV mA 6 000A 1 2 6d 8 00 18969 1 8A continuous gt 8 to 15A for 30 sec max with 5 minutes cool down interval 45Hz 1kHz 10Hz 10kHz 10Hz 10kHz 10Hz 10kHz 10Hz 10kHz 10Hz 1kHz 10Hz 1kHz Accuracy 0 0396 3d Non Contact EF Detection Typical Voltage Edo Ind
8. DC and AC Last selection will be saved as power up default for repeat measurement convenience Note 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 Electric Field EF Detection At Volt or Current function press the EF button for one second or more and release to toggle to EF Detection feature The meter displays E F when it is ready Signal strength is indicated as a series of bar graph segments on the display plus variable beep tones EF NCV eNon Contact EF Detection An antenna is located along the top right end of the meter which detects electric field surrounds current carrying conductors It is ideal for tracing live wiring connections locating wiring breakage and to distinguish between live or earth connections eProbe 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 PC computer interface capabilities The instru
9. amage the instrument In many cases the suspected component must be disconnected from the circuit to obtain an accurate reading il Continuity function is convenient for checking wiring connections and operation of switches A continuous beep tone indicates a complete wire 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 DCmV ACmV Temperature amp F functions model 257 255 amp 252 only Press the SELECT button momentarily to select the subject functions in sequence Last selection Will be saved as power up default for repeat measurement convenience Note Be sure to insert the banana plug K type temperature bead probe Bkp60 with correct polarities 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 mA and A Current functions Press SELECT button momentarily to toggle between
10. ay 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 harmonics present on the neutral 5 Bus bars and electrical panels to vibrate 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 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 means a good ability to reject the effect of AC noise in 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 rolling or offset in voltage measurements This series has a CMRR specifications of gt 60dB at DC to 60Hz in ACV function and gt 100dB 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 CAUTION Before and after hazardous
11. easurements on primary overcurrent protection devices and ripple control units Measurement Category Ill CAT Ill is for measurements 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 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 measurements performed on circuits directly connected to the low voltage installation Examples are measurements on household appliances portable tools and similar equipment WARNING 2 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 current that exceeds the current rating of the protection fuse Do not attempt a current measurem
12. ent 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 wA mA or A input jack Only replace the blown fuse with the proper rating as specified in this manual Only use the test lead provided with the equipment or UL Listed Probe Assembly with rating or better 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 t IER 2 CENELEC DIRECTIVES The instruments conform to CENELEC Low voltage directive 2006 95 EC and Electromagnetic compatibility directive 2004 108 EC 3 PRODUCT DESCRIPTION 3 Note Top of the line model is used as representative for illustration purposes Please refer to your respective model for function availability 1 3 5 6 digits 6000 counts LCD display SAC he fi MIN p 2 Push buttons for special functions 1 Ls D a TTN t 3 Selector to turn the Power On or Off and Select a function 4 Input Jack for milli amp and micro am
13. ged by accident or abnormal conditions 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 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 OX V PRINTED ON RECYCLABLE PAPER PLEASE RECYCLE COPYRIGHT MMIX BTC RIGHTS RESERVED P N 7M1C 1011 B000 PRINTED IN TAIWAN
14. he 1000V range has the lowest 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 set the most appropriate trigger level You can also press the RANGE button momentarily to select another trigger level manually If the Hz reading becomes unstable select lower sensitivity to avoid electrical noise If the reading shows zero select higher sensitivity Number of Bar graph pointer is used to indicate input range sensitivity selected 1 2 3 4 pointers indicate 6 60 600 1000V 6 10 A 60 600 mA or 600 6000 UA is selected in corresponding V A or uA function respectively means range not available Hz of mV function is designed specially for logic level 3V or 5V family frequency measurement Resistance Continuity Capacitance model 257 255 amp 252 only amp gt Diode test functions Press the SELECT button momentarily to select the subject functions in sequence Last selection Will be saved as power up default for repeat measurement convenience FORWARD BIAS REVERSE BIAS CAUTION Discharge capacitors before making any measurement Large value capacitors should be discharged through an appropriate resistance load CAUTION Using resistance and continuity function in a live circuit will produce false results and may d
15. ication 20V tolerance 10V 36V 55V tolerance 23V 83V 110V tolerance 59V 165V 220V tolerance 124V 330V 440V tolerance 250V amp 1000V Indication Bar graph segments amp audible beep tones proportional to the field strength Detection Frequency 50 60Hz Detection Antenna Top right 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 measurements 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 dama
16. ife Hold The hold feature freezes the display for later view Press the HOLD button momentarily to toggle the hold feature Relative Zero A mode Relative zero allows the user to offset the meter consecutive measurements with the displaying reading as the reference value Practically all displaying readings can be set as relative reference value including MAX MIN feature readings Press the REL button momentarily to toggle relative zero mode 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 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 Note Manual ranging feature is not available in Hz and functions 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 Beep Jack Input Warning The meter beeps as well as displays InEr 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 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 CREST or REC
17. ment equips with an optical isolated interface port at the meter back for data communication Press HOLD button while turning the meter on to enable meter PC COMM output Optional purchase PC interface kit BRUA20X is required to connect the meter to the PC computer RS232 or USB ports at Fast 20 5 measurement mode model 257 amp 255 only Press REC button momentarily to activate MAX MIN recording mode The LCD MAX MIN turn on and the reading update rate will be increased to 20 second The meter beeps when new MAX maximum or MIN minimum reading is updated Press the button momentarily to read the MAX and MIN readings in sequence Press the button for 1 second or more to exit MAX MIN recording mode Auto ranging remains and Auto Power Off is disabled automatically in this mode 5ms CREST capture mode model 257 amp 255 only Press CREST button momentarily to activate CREST Instantaneous Peak Hold mode to capture 10 voltage or current signal duration as short as 5ms The LCD C amp MAX turn on Press the button momentarily to read the MAX and MIN readings in sequence Press the button for 1 second or more to exit CREST capture mode Auto ranging and Auto Power Off are disabled automatically in this mode Backlighted LCD display model 257 amp 255 only Press the SELECT button for 1 second or more to toggle the LCD backlight The backlight will also be turned off automatically after 32 seconds to extend battery l
18. n 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 WARRANT Y section for obtaining warranty or repairing service Battery and Fuse replacement Battery use 1 5V AAA Size battery x 2 Fuses use Fuse FS1 for AmA current input 0 63A 500Vac IR 50kA F fuse Fuse FS2 for A current input 10A 600Vac IR 100kA F fuse Battery and Fuse replacement Loosen the screw from the access cover of the case bottom Lift the access cover Replace the batteries or fuse Re fasten the screw GENERAL SPECIFICATION Display 3 5 6 digits 6 000 counts Update Rate 5 per second nominal 24 Segments Bar graph 40 per second max Operating Temperature 0 to 40 C Relative Humidity Maximum relative humidity 8096 for temperature up to 319C decreasing linearly to 50 relative humidity at 40 C Altitude Operating below 2000m Storage Temperature 209C 60 C lt 80 with battery removed Temperature Coefficient Nominal 0 15 x specified accuracy 0 C 18 C or
19. p current functions 5 Input Jack for all functions iS EXCEPT current uA mA A E ATi functions Bis ie 6 6 Common Ground reference Input Jack for all functions MAX 0 6A 7 Input Jack for 8A 15A for 30sec t functi PC Comm current function 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 Average sensing RMS calibrated T 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 True RMS True RMS is a term which identifies a DMM that responds accurately to the 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 Harmonics m
20. upled from adjacent hard signals which confuse common multimeter voltage measurements Our AutoCheck mode provides low ramp up input impedance approx 2 5kQ at low voltage to drain ghost voltages leaving mainly hard signal values on meter readings It is an invaluable feature for precise indication of hard signals such as distinguishing between hot and open wires to ground in electrical installation applications WARNING p AutoCheck mode input impedance increases abruptly from initial 2 5 to a few hundred kQ s on high voltage hard signals LoZ displays on the LCD to remind the users of being in such low impedance mode Peak initial load current while probing 1000VAC for example can be up to 566mA 1000V x 1 414 2 5 decreasing abruptly to approx 3 8mA 1000V x 1 414 375kC within a fraction of a second Do not use AutoCheck mode on circuits that could be damaged by such low input impedance Instead use rotary selector V or V high input impedance voltage modes to minimize loading for such circuits DCV ACV amp Line Frequency functions Press the Hz push button for one second or more to activate or to exit Hz DCV ACV Hz Input sensitivity varies automatically with function range selected before activating the Hz function 6V function range has the highest and t
Download Pdf Manuals
Related Search