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USER'S MANUAL

BM157 & BM357

3-Phase

PowerClamp

TM

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Summary of Contents for BM157

Page 1: ...USER S MANUAL BM157 BM357 3 Phase PowerClampTM ...

Page 2: ...VOLTAGE 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 installat...

Page 3: ...fects are found replace them immediately This Clamp on meter is designed to apply around or remove from uninsulated hazardous live conductors But still individual protective equipment must be used if hazardous live parts in the installation where measurement is to be carried out could be accessible CAUTION Disconnect the test leads from the test points before changing meter functions INTERNATIONAL...

Page 4: ...ndicate the limits of safe access to the jaws during current measurements 4 Push buttons for special functions features 5 Input Jack for all functions EXCEPT non invasive ACA current thus Power function 6 Common Ground reference Input Jack for all functions EXCEPT non invasive ACA current thus Power function 7 Slide switch Selector to turn the power ON OFF and Select a function 8 LCD display 9 Jaw...

Page 5: ...meter displays the voltage value in appropriate DC or AC whichever larger in peak magnitude Annunciators Auto dc and Auto turn on respectively On the contrary with no voltage signal present on V COM terminals but a ACA current signal above the nominal threshold of AC 1A 40Hz 500Hz up to the rated 1000A is input via the jaws the meter displays the ACA current value Annunciators and Auto turn on acc...

Page 6: ...rement accuracy Keep the jaws away from them as much as possible to minimize influence THD F Total Harmonic Distortion Fundamental function model 157 only Total Harmonic Distortion Fundamental THD F function is designed to give basic indication on the presence of Harmonics It is the percentage ratio of the Total Harmonics RMS value to the Fundamental RMS value of a voltage or current signal and is...

Page 7: ...ss the Peak rms button momentarily again can manually select thru lower measuring dynamic range 400 0A or 40 00A for higher measuring resolutions Line level Frequency Hz function When ACV or ACA function is auto selected or manual selected press Hz button momentarily toggles to Line level Frequency Hz function The Hz trigger level is determined by the selected function range from where the Hz func...

Page 8: ... A to the voltage V An inductive circuit is said to have a lagging power factor since current A lags voltage V phase shift angle θ and thus Sinθ are both and a capacitive circuit is said to have a leading power factor since current A leads voltage V phase shift angle θ and thus Sinθ are both Total Power Factor encountering harmonics When encountering distorted waveforms with the presence of harmon...

Page 9: ...n Press 3 Bal 1 button momentarily to toggle between Single Phase and 3 Phase Balanced Load Power functions Annunciators and 3 turn on respectively Press SELECT button momentarily selects between W real power VAR reactive power VA apparent power kWHr real time readings or stored result functions In W real power VAR reactive power or VA apparent power function ...

Page 10: ...aveform is leading the Voltage waveform and the phase shift angle θ is Note 1 Under proper measurement setups for load circuits the W real power readings are always positive Negative W readings indicate reversed clamp on jaws direction or test leads polarities or even incorrect voltage lines are being measured as in 3 phase measurement setups Correct them for proper A lags V indications 2 When enc...

Page 11: ...e Balanced Load Power functions section To start kWHr Recording press 3 Bal 1 and HOLD buttons at the same time Annunciator turns on flashes kWHr accumulated time in Hour is displayed automatically in the secondary mini display To pause press HOLD button momentarily Annunciator stops flashing and is always on To continue press the HOLD button momentarily again Annunciator resumes flashing ...

Page 12: ...hours exponential readings are displayed 2 3E4 kWHr represents 2 3 x 104 kWHr or 23000 kWHr for example After the kWHr Recording session is stopped properly the new result will supersede the previous one stored in the non volatile memory You can then switch off the meter for transportation storage or even battery changing with memory remained To avoid mis storage to memory it is important to prope...

Page 13: ...tion Set the slide switch function selector to the 3 Un Bal Power position Press 3W 4W button momentarily to select 4 Wire measurements Annunciator 4W turns on Clamp the jaws around Line 1 as reminded by annunciators L1 and connect Black test probe COM terminal to Line n neutral and Red test probe terminal to Line 1 as reminded by annunciators on mini display When the reading is stable press butto...

Page 14: ...e 3 as reminded by annunciators on mini display When the reading is stable press button momentarily to enter the third measuring value The meter will then calculate store and display the total 3 Phase Power result automatically Annunciators L1 L2 L3 turn on Press button momentarily again for new measurements Press SELECT button momentarily to view the last stored result Annunciator turns on flashe...

Page 15: ...ctivity To wake up the meter from APO press SELECT button or slide the function selector to OFF position and back on again Always turn the function selector to OFF when the meter is not in use Auto Power Off Quick Test Press and hold the 3W 4W button while powering the meter on The LCD displays to confirm activation right after the 3W 4W button is released Quick test APO timing is 10 seconds after...

Page 16: ...ectrical 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 Trouble Shooting If the instrument fails to operate check batteries and test leads etc and replace as necessary Double check operating procedure as described in this user s manual If the instrument voltage resistance input term...

Page 17: ...play Power Ohm Hz functions 9999 counts LCD display ACA clamp on function 4000 counts LCD display Update Rate Power function 2 per second nominal Voltage ACA clamp on Ohm functions 2 per second nominal Hz function 1 per second nominal Polarity Automatic Low Battery Below approx 2 4V Operating Temperature 0oC to 40oC Relative Humidity Maximum relative humidity 80 for temperature up to 31oC decreasi...

Page 18: ... Power Supply standard 1 5V AAA Size NEDA 24A or IEC LR03 battery X 2 Power Consumption Voltage ACA Hz Power functions 11mA typical Ohm function 5 5mA typical APO Timing Idle for 30 minutes APO Consumption 4 A typical Dimension L224 X W78 X H40 mm for model 157 L189 X W78 X H40 mm for model 357 Weight 224 gm approx for model 157 192 gm approx for model 357 Jaw opening Conductor diameter 45mm max f...

Page 19: ...dwidth for non sinusoidal waveforms Fundamentals are specified at 50Hz and 60Hz AC Voltage RANGE Accuracy 50Hz 60Hz 600 0V 0 5 5d 45Hz 500Hz 600 0V 1 5 5d 500Hz 3 1kHz 600 0V 2 5 5d CMRR 60dB DC to 60Hz Rs 1k Input Impedance 2M 30pF nominal Crest Factor model 157 2 3 1 at full scale 4 6 1 at half scale model 357 2 1 at full scale 4 1 at half scale ACV AutoVATM Threshold 30VAC 40Hz 500Hz only nomin...

Page 20: ... 8 1 at half scale for 1000A range model 357 3 1 at full scale 6 1 at half scale for 40 00A 400 0A 600A ranges 1 Induced error from adjacent current carrying conductor 0 06A A 2 Specified accuracy is from 1 to 100 of range and for measurements made at the jaw center When the conductor is not positioned at the jaw center position errors introduced are Add 1 to specified accuracy for measurements ma...

Page 21: ...damental 70V Total RMS 600V for ACV THD F fundamental 6A Total RMS 1000A for ACA THD F and Crest Factors 2 5 for 600V Range 2 5 for 40A Range 3 0 for 400A Range 1 6 for 1000A Range 2 Add 4d to specified accuracy 40A Range 3 Add 4 5 to specified accuracy 1000A range 4 Unspecified 1000A range 5 Add 1 4d to specified accuracy 40A Range 6 Add 4 5 to specified accuracy 400A 750A unspecified 750A 7 150 ...

Page 22: ...clamp measurement at the center of jaws When the conductor is not positioned at the jaw center position errors introduced are Add 1 to specified accuracy for ACA measurements made WITHIN jaw marking lines away from jaw opening Accuracy is not specified for ACA measurement made BEYOND jaw marking lines toward jaws opening 2 Add 4d to specified accuracy for 3 Phase Balanced Load Power measurements 3...

Page 23: ... Hour Energy Time base accuracy 30ppm Non volatile memory Separately stores one 3 Phase Balanced Load and one Single Phase result 3 Phase Unbalanced Load Power This 3 Phase Unbalanced Load Power measurement is achieved thru the calculation of discrete single phase measurements that are taken one at a time manually Since it is not real time on all 3 phases simultaneously it is intended only for sta...

Page 24: ...repaid 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 handling you will be billed for the repair THIS WARRANTY IS EXCLUSIVE AND IS IN LIEU O...

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