Brymen BM905s Manuale utente

USER'S

MANUAL

BM905s

BM906s

BM907s

Versatile

Multimeters

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

IEC/UL/EN61010-1 Ed. 3.0, IEC/EN61010-2-030 Ed. 1.0, IEC/EN61010-2-033 Ed. 1.0,

IEC/UL/EN61010-031 Ed. 1.1 and CAN/CSA-C22.2 No. 61010-1-12 Ed. 3.0 to

Category II 1000 Volts, CAT III 600Volts and CAT IV 300Volts AC & DC.

Terminals (to COM) measurement category:

V / A / mAA: Category II 1000V, Category III 600V and Category IV 300V AC & DC.

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 measurements on

primary overcurrent protection devices and ripple control units.

Measurement Category III (CAT III) 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 II (CAT II) 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

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(s). Do not attempt a current

measurement to any circuit where the open circuit voltage is above the protection

fuse(s) voltage rating(s). Suspected open circuit voltage should be checked with

voltage functions. Never attempt a voltage measurement with the test lead inserted into

the A/mA or A input jack. Only replace the blown fuse(s) with the proper rating as

specified in this manual. Only use the test lead provided with the equipment or UL

Listed Probe Assembly.

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

2) CENELEC DIRECTIVES

The instruments conform to CENELEC Low-voltage directive 2006/95/EC and

Electromagnetic compatibility directive 2004/108/EC

3) PRODUCT DESCRIPTION

This user's manual uses only representative model for illustrations. Please refer

specification details for function availability to each model.

1) 3-5/6 digits 6000

counts + 999 counts

dual display LCD

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

current (



A, mA, A)

functions

6) Common (Ground

reference) Input Jack

(-) for all functions

7) Input Jack (+) for

milli-amp and

micro-amp functions

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.

VFD-ACV +Hz & VFD-Hz (Line Level)

Function defaults at VFD-ACV +Hz. By default, voltage is set at 600V & 1000V two

auto-ranges to best cope with most Variable Frequency Drives (VFD) measurements.

High noise-rejection frequency measurement algorithm and Low-pass filter circuit are

permanently bundled with all the voltage and frequency function-ranges within this

rotary-switch position. Press the RANGE button momentarily to select other ranges

only when needed.

Hz Input sensitivity varies automatically with voltage range selected. 6V range has the

highest and 1000V range has the lowest. Press SELECT button momentarily toggles to

higher resolution VFD-Hz in main display. The display shows the selected voltage

range for about one second before displaying Hz readings. Pressing the RANGE

button momentarily repeatedly to display and select any other voltage range. If the Hz

reading becomes unstable, select higher voltage range to avoid electrical noise. If the

reading shows zero, select lower voltage range for better sensitivity.

ACV +Hz & Hz (Line Level)

All the voltage and frequency function-ranges within this rotary-switch position are set

at regular frequency response without employing LPF. Function defaults at ACV +Hz. Hz

Input sensitivity varies automatically with voltage range selected. 6V range has the

highest and 1000V range has the lowest. Press SELECT button momentarily toggles to

higher resolution Hz in main display. The display shows the selected voltage range for

about one second before displaying Hz readings. Pressing the RANGE button

momentarily repeatedly to display and select any other voltage range. If the Hz reading

becomes unstable, select higher voltage range to avoid electrical noise. If the reading

shows zero, select lower voltage range for better sensitivity.

DCmV, ACmV +Hz & Hz (Logic Level)

Function defaults at DCmV. Press the SELECT button momentarily to select the

subject functions in sequence. Hz (Logic Level) is set at the highest available sensitivity

for logic level frequency measurements.

DCV

Turn rotary switch to DCV function position directly.

 Resistance, Continuity

Defaults at . Press SELECT button momentarily to select Continuity function

which is convenient for checking wiring connections and operation of switches. A

continuous beep tone indicates a complete wire.

CAUTION

Using Resistance, Continuity, Diode or Capacitance 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 measurement

reading.

Capacitance

Defaults at . Press SELECT button momentarily 2 times to select Capacitance

function. Relative zero mode can be used to zero out the parasitic capacitance of

the leads and the internal protection circuitry of the meter when measuring low

capacitance in the order of Pico Farad (pF).

CAUTION

Discharge capacitors before making any measurement. Large value capacitors should

be discharged through an appropriate resistance load

Diode test

Defaults at . Press SELECT button momentarily 3 times to select Diode test

function. 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).

Temperature (Model 906s & 907s only)

Defaults at oC. Press SELECT button momentarily to select oF function.

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.

Electric Field EF-Detection

Model 905 defaults at E.F. function. Models 906s & 907s default at oC. Press SELECT

button momentarily 2 times to select E.F. function. 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.

●Non-Contact EF-Detection: An antenna is located along the top end of the meter,

which detects electric field surrounding current-carrying conductors. It is ideal for

tracing live wiring connections, locating wiring breakage and to distinguish between live

or earth connections.

●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.

A, mA, and A Current functions

Function defaults DC. Press SELECT button momentarily to select AC +Hz. Hz Input

sensitivity varies automatically with current range selected. 600A range has the

highest and 10A range has the lowest. Press SELECT button momentarily further

select higher resolution Hz in main display. The display shows the selected current

range for about one second before displaying Hz readings. Pressing the RANGE

button momentarily repeatedly to display and select any other current range. If the Hz

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