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Table of Contents
Related Manuals for Brymen EEVblog BM235
Summary of Contents for Brymen EEVblog BM235
- Page 1 USER'S MANUAL BM235 Revision: 5 March 2016...
- Page 2 INTRODUCTION Congrats on purchasing the EEVblog BM235 mutlimeter. It's a beaut little meter, one of the safest and well built meters in a small form factor. You've made a wise choice buying this instead of some questionable quality cheapie. It should return the favor with many years of safe and accurate service.
- Page 3 SAFETY This manual contains information and warnings 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.
- Page 4 International Electrical Symbols Marking of Electrical and Electronic Equipment (EEE). Do not dispose of this product as unsorted municipal waste. Contact a qualified recycler Caution! Refer to the explanation in this Manual Caution! Possibility of electric shock Earth (Ground) Meter protected throughout by Double Insulation or Reinforced insulation Fuse Direct Current (DC) Alternating Current (AC)
- Page 5 1) 3-5/6 digits 6000 counts LCD display 2) Push-buttons for special functions & features 3) Selector to turn the Power On or Off and Select a function 4) Input Jack for 10A (20A for 30sec) current function 5) Input Jack for all functions EXCEPT ...
- Page 6 True RMS RMS (Root-Mean-Square) is a term used to describe the effective or equivalent DC value of an AC signal. True RMS is the 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.
- Page 7 AutoV (LoZ) (Model 235 only) AutoV automatically selects measurement function of DCV or ACV based, on their input levels via the test leads. The input also provides a low ramp-up impedance (LoZ) to drain ghost voltages*. ●With no input, the meter displays “- - - -” when it is ready. ●When 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.
- Page 8 WARNING: AutoV mode input impedance increases abruptly from initial 2.1kΩ to a few hundred kΩ’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 673mA (1000V x 1.414 / 2.1kΩ), decreasing abruptly to approx.
- Page 9 Line Frequency (Models 233 & 235 only) Press the Hz push-button momentarily to toggle Hz function. It is only available to Voltage and Current related ranges. Input sensitivity varies automatically with the function range selected while activating the Hz function. 6V function range has the highest and the 1000V range has the lowest.
- Page 10 Resistance & BeepLit Continuity Press the SELECT button momentarily to toggle the functions. Last selection will be saved as power up default for repeat measurement convenience. BeepLit Continuity function is having improved convenience for checking wiring connections and operation of switches. A continuous beep tone together with flashing display backlight indicate a complete wire.
- Page 11 Capacitance (Models 235 & 233 only); Diode Press the SELECT button momentarily to toggle the functions. Last selection will be saved as power up default for repeat measurement convenience. In Diode function, the normal forward voltage drop (forward biased) for a good silicon diode is between 0.400V to 0.900V.
- Page 12 ACmV & DCmV; Temperature C & F (Model 235 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 type-K temperature bead probe Bkp60 with correct polarities.
- Page 13 A, mA and A Current Press SELECT button momentarily to toggle between DC and AC. Last selection will be saved as power up default for repeat measurement convenience. Application notes for flame sensors: DC A function is useful for HVAC/R flame sensor applications. The 0.1 A resolution can identify the minute current changes in flame detector applications.
- Page 14 Faulty Photocell Temperature over 165 F (74 C) at photocell For gas flames (Flame Rod): Ignition interference (A flame signal current difference with the ignition both on and off greater than 0.5 A indicates the presence of ignition interference) ...
- Page 15 Electric Field EF-Detection Press the EF button momentarily to toggle EF-Detection feature. The meter displays “EF-H” when it is ready. If it is too sensitive for your applications, press (Level) button momentarily toggles to lower sensitivity “EF-L”. The detected Electric Field strength is indicated as a series of bar-graph segments on the display plus variable beep tones.
- Page 16 MAX/MIN/AVG Record mode Press REC button momentarily to activate MAX/MIN/AVG recording mode. The LCD “MAX MIN AVG” turn on. The meter beeps when new MAX (maximum) or MIN (minimum) reading is updated. Press the button momentarily to read the MAX, MIN, AVG readings in sequence.
- Page 17 Manual or Auto-ranging For most auto-ranging functions (LCD turns on by default), press the RANGE button momentarily to select manual-ranging override. The meter will remain in the range it was in, the LCD turns off. Press the button momentarily again to select the next range.
- Page 18 Trouble Shooting If the instrument looks to be buggered, check battery, fuses, leads, etc., and replace as necessary. Double check operating procedure as described in this user’s manual Battery: 1.5V AAA Size battery x 2 240 hours continuous use on Alkaline cells Fuse F1 for AmA current input: 0.4A/1000V DC/AC, IR...
- Page 19 GENERAL SPECIFICATION Display: 3-5/6 digits 6,000 counts Update Rate: 5 per second nominal Operating Temperature: -10 C to 45 Relative Humidity: Maximum relative humidity 80% for temperature up to 31 decreasing linearly to 50% relative humidity at 45 Altitude: Operating below 2000m Storage Temperature: -20 C ~ 60 C, <...
- Page 20 Weight: Approx. 334 gm (With Holster) Special Features: AutoV (LoZ) (Model 235 only); VFD; BeepLit Continuity; Auto- ranging MAX/MIN/AVG Record; Backlighted LCD; Auto-ranging Relative Zero mode; Display Hold; EF-Detection (NCV); BeepJack™ on AmA/A terminals Accessories: Test lead pair; Batteries installed; User’s manual; BKP60 banana plug type-K thermocouple (Model 235 only) Optional Purchase Accessories: BKB32 banana plug to type-K socket plug adaptor (Model 235 only);...
- Page 21 VFD_ACV (with Low Pass Filter ) RANGE Accuracy 10Hz ~ 100Hz fundamental) 600.0V, 1000V 1.0% + 3d 100Hz ~ 400Hz fundamental) 600.0V, 1000V 10% + 3d Not specified for fundamental frequency > 400Hz Accuracy linearly decreases from 1% + 3d @100Hz to 10% + 3d @400Hz AutoV_ACV (Model 235 only) RANGE Accuracy...
- Page 22 AutoV_DCV (Model 235 only) RANGE Accuracy 600.0V, 1000V 2.0% + 3d Not specified at <1VDC Threshold: > +1.0VDC or < -1.0VDC nominal Input Impedance: Initially approx. 2.1k, 164pF nominal; Impedance increases abruptly within a fraction of a second as display voltage is above 50V (typical). Ended up impedances vs display voltages typically are: 12k...
- Page 23 Diode Tester RANGE Accuracy 3.000V 0.9% + 2d Test Current: 0.3mA typical Open Circuit Voltage: < 3.2VDC typical Dave's Note: You can dimly light up most LED's with the Diode range DC Current RANGE Accuracy Burden Voltage 600.0A 1.0% + 3d 0.1mV/A (100 ohms) 6000A 60.00mA...
- Page 24 AC Current RANGE Accuracy Burden Voltage ~ 400H 1.5% + 3d 600.0A, 6000A 0.1mV/A 60.00mA, 600.0mA 1.9mV/mA 1.0% + 3d 6.000A , 10.00A 0.04V/A <5d non-zero residue may appear when backlight is on, which will not affect the specified measuring range and accuracy 10A continuous, >10A to 20A for 30 seconds max with 5 minutes cool down interval Temperature (Model 235 only) RANGE...
- Page 25 Line Frequency (Models 233 & 235 only) Function Sensitivity (Sine RMS) Range 60mV, 600mV 50mV 10Hz - 50kHz 10Hz - 50kHz 10Hz - 50kHz 600V 10Hz - 1kHz 1000V 500V 10Hz - 1kHz VFD 600V 10Hz - 1kHz VFD 1000V 500V 10Hz - 1kHz 10Hz - 5kHz...
- Page 26 Teardown Photos...
- Page 30 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.