Brymen BM110M Bedienungsanleitung

USER'S MANUAL

BM110M, BM111M, BM112M Single Display

BM127M, BM128M Twin Displays

Versatile Clamp-on Multimeter Series

1) S FETY

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 meets the requirements for double insulation to IEC61 1 -2- 32, EN61 1 -

2- 32, UL61 1 B-2- 32, IEC61 1 -1 2nd Ed., EN61 1 -1 2nd Ed., UL61 1 -1 2nd

Ed.:

Category III 6 Volts ac and dc.

PER IEC61010 OVERVOLT GE INST LL TION C TEGORY

OVERVOLTAGE CATEGORY II

Equipment of OVERVOLTAGE 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 installation.

OVERVOLTAGE CATEGORY IV

Equipment of OVERVOLTAGE CATEGORY IV is for use at the origin of the

installation. Note – Examples include electricity meters and primary over-current

protection equipment.

TERMS IN THIS M NU L

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.

W RNING

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.

To avoid electrical shock hazard, observe the proper safety precautions when working

with voltages above 6 VDC or 3 VAC rms. These voltage levels pose a potential

shock hazard to the user. Before and after hazardous voltage measurements, test the

voltage function on a known source such as line voltage to determine proper meter

functioning.

Keep your hands/fingers behind the hand/finger barriers (of the meter and the test

leads) that indicate the limits of safe access of the hand-held part 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.

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.

INTERN TION L ELECTRIC L 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

Application around and removal from hazardous live conductors is permitted

2) CENELEC Directives

The instruments conform to CENELEC Low-voltage directive 73/23/EEC and

Electromagnetic compatibility directive 89/336/EEC

3) PRODUCT DESCRIPTION

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

specification details for function availability to each model.

1) Transformer Clamp Jaw for AC current magnetic field pick up

2) Hand/Finger Barrier to indicate the limits of safe access of the meter during

measurement

3) Push-buttons for special functions & features. Also as power ON/OFF buttons for

ACA function in Twin Display Models

4) Push-buttons for special functions & features on Slide-switch Selector functions

5) Input Jack for all functions EXCEPT non-invasive ACA current function

6) Common (Ground reference) Input Jack for all functions EXCEPT non-invasive

ACA current function

7) Slide-switch Selector to turn the power ON/OFF and Select a function

8) 3-3/4 digits 4 counts LCD display(s)

9) Jaw trigger for opening the transformer clamp jaw

1 ) Jaw center Indicators, at where best ACA accuracy is specified

11) Jaw marking lines for ACA position error indication

4) OPER TION

CAUTION: Before and after hazardous voltage easure ents, test the voltage

function on a known source such as line voltage to deter ine proper eter functioning.

DC Voltage, C Voltage, Hz Frequency functions

Set slide-switch to Voltage function position(s). Inputs are made through the test leads

terminals. For Twin Display Models, slide-switch on defaults at AC voltage. Press

SELECT button momentarily to select DC voltage.

Press the Hz button momentarily to activate Hz Frequency function in the following

slide-switch functions:

Single Display Models: DCV & ACV via the test leads; ACA via the clamp jaw

Twin Display Models: DCV, ACV, DCµA & ACµA via the test leads (not available to

ACA)

Note: DC 4 . mV range is designed with 1 MΩ high input impedance for least

current drain in measuring small signals, and can cope better with most commercially

available voltage output transducers/adapters. The non-zero display reading is normal

when the meter inputs are open circuit, which will not affect actual measurement

accuracy. The meter will show close to zero readings when the inputs are shorted.

Open input is actually a floating condition, which is not a zero-volt-input condition.

Note: The Hz trigger level is determined by the selected function-range from where

the Hz function is activated. In ACV function:

Activating the Hz function during significant measurements can get the most

appropriate trigger level to avoid electrical noises in most cases. Electrical noise may

cause unstable Hz reading.

Activating the Hz function at AC 4. V range (before making significant

measurements) can get lower trigger level (higher sensitivity). Hz reading may show

zero when the sensitivity is insufficient.

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.

Ω

ΩΩ

Ω Resistance, and Continuity functions

Inputs are made through the test leads terminals. Slide-switch on defaults at Ω. 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.

Diode test function

Inputs are made through the test leads terminals. Slide-switch on defaults at Ω. Press

SELECT button momentarily 2 times to select Diode test function. Normal forward

voltage drop (forward biased) for a good silicon diode is between .4 V to .9 V. 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).

Capacitance function (not available to Model 110M)

Inputs are made through the test leads terminals. Slide-switch on defaults at Ω. Press

SELECT button momentarily 3 times to select Capacitance function.

Note: (applies to Models 111M & Model 112M only)

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 measurements. Large value capacitors

should be discharged through an appropriate resistance load

C function

Inputs are made through the clamp jaws for non-invasive ACA current measurements.

For Single Display Models, set the slide-switch to select the ACA function.

For dual inputs Twin Display Models, press the OFF push button momentarily to power

on and off the separate ACA function display. The HOLD push button can also be used

as the ACA function power on hotkey. This twin display ACA function can be used

simultaneously with the voltage or any other slide-switch functions when making

measurements.

CAUTION (Application and removal of the Clamp-on meter)

For non-invasive ACA current measurements, press the jaw trigger and clamp the jaws

around only one single conductor of a circuit for load current measurement. Make sure

the jaws are completely closed, or else it will introduce measurement errors. Enclosing

more than one conductor of a circuit will result in differential current (like identifying

leakage current) measurement. Locate the conductor(s) at the Jaws center as much as

possible to get the best measuring accuracy. For removal, press the jaw trigger and

remove the jaws from the conductor(s).

Adjacent current-carrying devices such as transformers, motors and conductor wires

will affect measurement accuracy. Keep the jaws away from them as much as possible

to minimize influence.

Temperature function (Twin Display Models only)

Be sure to insert the banana plug type-K temperature bead probe Bkp6 with correct

polarities. Slide-switch on defaults at degree C (Celsius). Press SELECT button

momentarily to select degree F (Fahrenheit). You can also use a plug adapter Bkb32

(Optional purchase) with banana pins to type-K socket to adapt other type-K standard

mini plug temperature probes.

µµ

µ Current function (Twin Display Models only)

Inputs are made through the test leads terminals. Slide-switch on defaults at DC. Press

SELECT button momentarily to select AC.

Application notes:

The DCµA function is designed especially for HVAC/R flame sensor applications. The

.1µA resolution is useful for identifying the minute current changes in flame detector

applications. Flame signal current check should indicate steady flame signal of at

least 2µA for a rectification type, or 1.5µA for an ultraviolet type (8µA for self checking

systems). If a flame signal current with inadequate strength or fluctuation beyond 1 %,

check the following to avoid the risk of unwanted flame relay dropout :

1-1) For gas or oil flames (Minipeeper):

 Low supply voltage

 Detector location

 Defective detector wiring

 Dirty viewing windows

 Faulty Minipeeper

1-2) For oil flames (Photocell):

 Detector location & wiring

 Smoky flame or poorly adjusted air shutter

 Faulty Photocell

 Temperature over 165 F (74 C) at photocell

1-3) For gas flames (Flame Rod):

 Ignition interference (A flame signal current difference with the ignition both on and

off greater than .5µA indicates the presence of ignition interference)

 Insufficient ground (must be at least 4 times the detector area)

 Flame lifting off burner head (ground), or not continuously in contact with the flame

rod

 Temperature in excess of 6 oF (316 oC) at the flame electrode insulator causing

short to ground.

HOLD

The hold feature freezes the display for later view. Press the HOLD button

momentarily toggles to hold mode in the following function(s):

Single Display Models: All functions

Twin Display Models: Upper display ACA function

M X

The max feature compares and displays the measured maximum value as fast as

3 ms with auto-ranging capability. Press the M X button for 1 second or more

toggles to max feature in the following function(s):

Single Display Models: DCV, ACV & ACA functions

Twin Display Models: Upper display ACA function

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