Brymen BM839 User manual

USER'S
MANUAL
BM839
BM836
Digital
Multimeter

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1) 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.
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. The meter is intended only for indoor use.
Observe proper safety precautions when working with voltages above 33 Vrms, 46.7
Vpeak or 70 VDC. These voltage levels pose a potential shock hazard to the user.
Before and after hazardous voltage measurements, check the voltage function on a
known source such as line voltage to determine proper meter functioning.
The meter meets UL/IEC/EN61010-1 Ed. 3.0, CAN/CSA C22.2 No. 61010-1 Ed. 3.0,
UL/IEC/EN61010-2-033 Ed. 1.0 to Measurement CAT-III 1kV and CAT-IV 600V, AC &
DC.
The accompanied test probe assembly meets UL/IEC/EN61010-031 Ed. 1.1 to the
same meter ratings or better. IEC 61010-031 requires exposed conductive test probe
tips to be ≤4mm for CAT III & CAT IV ratings. Refer to the category markings on your
probe assemblies as well as on the add-on accessories (like detachable Caps or
Alligator Clips), if any, for applicable rating changes.
Keep your hands/fingers behind the hand/finger barriers (of the meter and the test
probe assembly, where applicable) that indicate the limits of safe access of the hand-
held parts during measurements. Inspect lead wires, connectors, and probes for
damaged insulation or exposed metal before using the meter. If any defects are found,
replace them immediately. Only use the probe assembly provided with the meter or a
UL Listed Probe Assembly to the same meter ratings or better.

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CAUTION
Disconnect the test leads from the test points before changing functions.
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)
3Three-phase Alternating Current
Brief Information about Measurement Categories
Measurement Category IV is applicable to test and measuring circuits connected at
the source of the building’s low-voltage MAINS installation. Examples are
measurements on devices installed before the main fuse or circuit breaker in the
building installation.
Measurement Category III is applicable to test and measuring circuits connected to
the distribution part of the building’s low-voltage MAINS installation. Examples are
measurements on distribution boards (including secondary meters), 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 such as
stationary motors with permanent connection to the fixed installation.
Measurement Category II is applicable to test and measuring circuits connected
directly to utilization points (socket outlets and similar points) of the low-voltage MAINS
installation. Examples are measurements on MAINS CIRCUITS of household
appliances, portable tools and similar equipment.
2) CENELEC DIRECTIVES
The instruments conform to CENELEC Low-voltage directive 2014/35/EC,
Electromagnetic compatibility directive 2014/30/EU and RoHS directive 2011/65/EU.

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3) PRODUCT DESCRIPTION
Note: Top of the line model is used as representative for illustration purposes. Please
refer to your particular model for function availability.
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.
1) 4-1/2 digits 20000
counts & 3-5/6 digits 6000
counts selectable dual
displays
2) Push-buttons for special
functions & features
3) Selector to turn the
Power On or Off and Select
a function
4) Input Jack for mA/µA
function positive input
5) Common (Ground
reference) Input Jack for all
functions
6) Input Jack for all
functions EXCEPT A, mA
and µA functions
7) Input Jack for A function
positive input

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4) OPERATION
CAUTION
Before and after hazardous voltage measurements, test the voltage function on a
known source such as line voltage to determine proper meter functioning.
ACV +Hz & VFD ACV +Hz functions
Press the SELECT button momentarily to toggle the subject functions. Last selection
will be saved as power up default for repeat measurement convenience. For ACV +Hz
function, press the RANGE button momentarily to select other ranges manually when
needed. For VFD ACV +Hz function, default is set to 600V range to best cope with the
measurements of most Variable Frequency Drives (VFD). Press the RANGE button
momentarily to select 1000V range when needed.
DCV function
Turn Rotary Knob to DCV function position for measurements.

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Resistance, BeepLitTM Continuity, nS Conductance functions
Press the SELECT button momentarily to select the subject functions. Last selection
will be saved as power up default for repeat measurement convenience.
BeepLitTM 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. Such audible and visible indications improve
continuity readabilities in noisy working environments.
Conductance is the inverse of Resistance, that is S=1/or nS=1/G. It virtually
extends the Resistance measurements to the order of Giga-Ohms for leakage
measurements.
CAUTION
Using resistance, continuity or nS 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

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Auto leads resistance calibration
When entering the 200range manually by RANGE button for high precision low
resistance measurement, this feature will prompt you to short the inputs for temporary
test lead resistance calibration on this range.
The fastest way is to short the leads to auto-range to the 200range, then press the
RANGE button momentarily. The display shows ”Shrt”. Keep shorting the leads for
further 3 seconds until the display shows zero. The lead resistance is then temporarily
compensated.
The compensation value stays until the next meter power reset, and can be as high as
5. If you need a compensation value that is higher than that, Relative Zero mode is
recommended.
Diode Test, Capacitance functions
Press the SELECT button momentarily to toggle the functions. Last selection will be
saved as power up default for repeat measurement convenience.

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CAUTION
Discharge capacitors before making any measurement. Large value capacitors should
be discharged through an appropriate resistance load.
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).

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DCmV, ACmV +Hz functions
Press the SELECT button momentarily to toggle the subject functions. Last selection
will be saved as power up default for repeat measurement convenience.

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Temperature functions (Model 839 only)
Press SELECT button momentarily to toggle C and F readings. 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. You can also use a plug adapter Bkb32 (Optional purchase)
with banana pins to type-K socket to adapt other standard type-K mini plug
temperature probes.