Brymen BM22s, BM25s, BM25a, BM27s User guide

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BM22s, BM25s, BM25a & BM27s

USER'S MANUAL

1) PRODUCT DESCRIPTION

Note: Top of the line model is used as representative for illustration purposes. Please refer to your respective model for function availability.

1) LCD display

2) Rotary Selector to Select additional functions ( ), and to turn the Power On or Off (Model 22s only). Model 25s

only

& 25a does not have a physical Rotary Selector.

3) Push-button to Select additional functions (all models), and to

switch the Power On or Off (

4) Input for all functions, or otherwise specified. Red test lead for

positive (+) polarity and Black test lead for Ground reference (-)

2) 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

With test lead tip insulation CAP, the meter is protected, against the users, by double insulation per

use.

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 CAT III 300V & CAT II 600V (CAT II 450V for Model 25s &

). In case of removing test lead tip insulation CAP, to CAT II 600V (CAT II 450V for Model 25s & 25a) only.

25a

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 and probes for damaged insulation or exposed metal before using the instrument. If any defects are found, replace them immediately.

Models 27s & 22s

Models 27s, 25s & 25a only)

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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

3) CENELEC DIRECTIVES

The instruments conform to CENELEC Low-voltage directive 2006/95/EC and Electromagnetic compatibility directive 2004/108/EC

4) OPERATION

Note: All function operations described hereafter are via the Red test lead for positive (+) polarity and Black test lead for Ground reference (-), or otherwise specified

Warning: Before and after hazardous voltage measurements, test the voltage function on a known source such as line voltage to determine proper meter functioning.

4-1) FUNCTIONS IN “Auto V.

-Quick Start (

Models 27s, 25s & 25a only)

” POSITION (Models 27s, 25s & 25a only)

AutoCheckTM mode is the default function in “Auto V.” position. Press the SELECT button momentarily to select



and step through the functions: AutoCheckTM→Continuity→EF→ACV→DCV→

-AutoCheckTM mode (

Model 27s, 25s & 25a only)

→Hz→Cx→AutoCheckTM

This innovative AutoCheckTM feature automatically selects measurement function of DCV, ACV or Resistance () based on the input via the test leads.

●With no input, the meter displays “Auto” when it is ready.

●With no voltage signal but a resistance below 6M is present, the meter displays the resistance value. When

below 25 is present, the meter (

●When a signal above the threshold of DC 1.2V or AC 1.5V up to the rated 600V (450V for

Model 27s only) further gives a continuity beep tone.

Model 25s & 25a) is

present, the meter displays the appropriate voltage value in DC or AC, whichever larger in peak magnitude.

●Overload-Alert Feature: When above rated 600V (450V for Model 25s & 25a) is present, the meter displays “OL” with a warning beep tone. Disconnect the test leads from the signal immediately to avoid hazards.

Note:

*Range-Lock Feature: When a measurement reading is being displayed in AutoCheckTM mode, press the SELECT button momentarily 1 time can lock the function-range it was in. The LCD annunciator “

” turns off. Range-lock can speed up repetitive measurements. Press the SELECT button momentarily again to return to AutoCheckTM mode. *Hazardous-Alert: When making resistance measurements in AutoCheckTM mode, an unexpected display of voltage readings alerts you that the part under test is still energized. *AutoCheckTM nominal input impedances are slightly lower than that of common digital multimeters. They are, in

fact, more similar to that of most traditional analog multimeters. “LoZ” will display on the LCD to remind the users

in such cases. Although not likely, if such impedance might damage your circuits, use the common impedance (HiZ) voltage mode (

-Continuity, Audible With Symbolic Display (

Models 27s & 22s only) for making voltage measurements on them.

Models 27s, 25s & 25a only)

From AutoCheckTM with “Auto” being displayed, press the SELECT button momentarily 1 time to select Continuity function. The meter displays a symbolic open-switch display “

” when it is ready. Continuity is convenient for

checking wiring connections and operation of switches. A continuous beep tone with a symbolic closed-switch

” indicates a complete circuit. In noisy environments, it is helpful to “see” continuity measurements.

display “

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-Electric Field EF-Detection (Models 27s, 25s & 25a only)

From AutoCheckTM with “Auto” being displayed, press the SELECT button momentarily 2 times to select EFDetection feature. The meter displays “EF” when it is ready. Signal strength is indicated as a series of bar-graph segments on the display and variable beep tones.

●Non-Contact EF-Detection: An antenna is located at the top left corner of the meter, which detects electric field surrounds 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 sockets, use the Red (+) test probe for direct contact measurements.

-V and

 of AutoCheckTM In Manual Selection (Models 27s, 25s & 25a only)

From AutoCheckTM with “Auto” being displayed, press the SELECT button momentarily 3 times to select ACV, 4 times to select DCV and 5 times to select Resistance () functions of AutoCheckTM. Such selected function

remains auto-ranging.

-Frequency And Capacitance (

Models 27s, 25s & 25a only)

From AutoCheckTM with “Auto” being displayed, press the SELECT button momentarily 6 times to select Frequency (Hz), 7 times to select Capacitance (F) functions and 8 times to return to AutoCheckTM mode.

Note: *Unlike the Line Level Hz Frequency function (for Model 27s only) as stated, this (Common) Hz Frequency function is set only at the highest input sensitivity mainly for measuring small electronic signals of below 20VAC rms.

4-2) OTHER FUNCTIONS

-DCV, ACV & Line-Level Hz functions (

Model 27s only)

Rotate the rotary selector to the V position selects common impedance (Hi-Z) voltage measurements. DCV is the default function. Press SELECT button momentarily to select ACV. The AC annunciator “

” turns on. Press

momentarily again to activate the Line-Level Hz function.

Note: *Line-Level Hz input sensitivity varies automatically with ACV range selected when Line-Level Hz is selected. AC 6V range has the highest and AC 600V range has the lowest sensitivity. Measuring the signal in ACV function WHILE selecting Line-Level Hz function in that ACV range automatically sets the most appropriate sensitivity for higher voltage applications. This can avoid electrical noises as in 110/220V line voltage applications for example. If the reading shows zero due to insufficient signal levels, select Line-Level Hz function BEFORE making measurements (at AC 6V range) will set the highest sensitivity.

-Diode & 600

Rotate the rotary selector to the

 functions (Model 27s only)

/600 position. Diode test is the default function. The reading shows the approximate voltage drop across the test leads. 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), and the meter will give a long beep as continuity warning. 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). Press SELECT button momentarily selects the lowest 600 range for lower resistance measurements. It is an extended range to complement the AutoCheckTM Resistance () function.

A & AC-A Micro-Amp functions (Model 27s only)

-DC-

Rotate the rotary selector to the A position. The display-reading unit is in A although there is no unit annunciator on the display. DC-A is the default function. There is no annunciator for DC. Press SELECT button

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momentarily to select AC-A. The AC annunciator “ ” turns on. These ranges, like other functions, are protected up to the maximum rated voltages of the meter.

-DCV & ACV functions (

Model 22s only)

Rotate the rotary selector to the V position selects common impedance (Hi-Z) voltage measurements. Press SELECT button momentarily toggles between DCV and ACV. Annunciator “ ” turns on for DC, and “ ” turns on for AC.

-Resistance, Continuity, Diode & Capacitance functions (

Rotate the rotary selector to the

/ / / position. Resistance “”is the default function.

Press SELECT button momentarily selects Continuity function. The Audible annunciator “

Model 22s only)

” turns on. Continuity

is convenient for checking wiring connections and operation of switches. A continuous beep tone indicates a complete circuit. Press SELECT button momentarily AGAIN selects Diode test function. The annunciator “

” turns on. The

reading shows the approximate voltage drop across the test leads. 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). Press SELECT button momentarily AGAIN selects Capacitance function.

-Frequency function (

Model 22s only)

Rotate the rotary selector to the Hz position selects Frequency function.

*Unlike the Line Level Hz Frequency function (for Model 27s only) as stated, this (Common) Hz Frequency function is set only at the highest input sensitivity mainly for measuring small electronic signals of below 20VAC rms.

4-3) OTHER FEATURES

-Power On & Off

Models 27s, 25s & 25a, press and hold the SELECT button for 1 second and then release to turn the power

For ON or OFF. Press and hold the SELECT button for approximately 6 seconds to master reset the system to the default stage if in case the meter hangs up unexpectedly. For

Model 22s, rotate the rotary selector to turn the power ON or OFF.

-Auto Power Off

Models 27s, 25s & 25a turn off intelligently after approximately 3 minutes of idle measurement readings and no button/switch activities.

Model 22s turns off automatically after approximately 30 minutes of only no button/switch

activities.

-HOLD The Hold feature freezes the display for later viewing. Press the HOLD

and 30ms MAX features (Model 22s only)

(MAX ) button momentarily to activate

or to exit the Hold feature. The Max feature captures voltage signals that have durations as short as 30ms (milliseconds) within a single range, and has automatic up range capability. This mode is available in DCV & ACV functions. Press the HOLD

(MAX

) button for 1 second or more to activate or to exit the Max feature.

-Auto-ranging

If the function selected has more than one range, the meter will auto-range to the best range and resolution. No manual ranging is required.

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5) MAINTENANCE

WARNING To avoid electrical shock, disconnect test leads from live circuits before opening the case. Do not operate with open case.

Cleaning and Storage

Periodically wipe the case with a damp cloth and mild detergent; do not use abrasives or solvents. If the meter is not to be used for periods of longer than 60 days, remove the battery and store it separately

Trouble Shooting

If the instrument fails to operate, check battery, leads, etc., and replace as necessary. Double check operating procedure as described in this user’s manual

If the instrument voltage-resistance input has subjected to high voltage transient (mostly caused by lightning or switching surge to your system) by accident or abnormal conditions of operation, the series fusible resistors will be blown off (become high impedance) like fuses to protect the user and the instrument. Most measuring functions through this input will then be open circuit. The series fusible resistors and the spark gaps should then be replaced by qualified technician. Refer to the LIMITED WARRANTY section for obtaining warranty or repairing service.

Battery replacement

If the meter starts up with persistent resetting display or with low battery icon

turns on, replace the battery ASAP. The meter uses one 3V coin battery IEC-CR2032. Before opening the case bottom, make sure the meter is switched off to avoid abrupt power reset to a running meter system. Disconnect test leads from live circuits. Loosen the screw from the case bottom. Lift the end of the case bottom nearest the input test leads until it unsnaps from the case top. Replace the battery. Observe battery polarities with positive (+) faces up (towards the case bottom). Replace the case bottom, and ensure that the snap on the case top (near the LCD side) is engaged. Re-fasten the screw.

Note for Models 27s, 25s & 25a battery replacement: *

Models 27s, 25s & 25a use micro-controller (like a computer) to run the meter system. WHEN THE METER IS

POWER-ON, intermittence battery power failure (fast intermittence battery contact interval in the order of millisecond) may cause the meter reset/re-startup abnormally. Simply press and hold the SELECT button for approximately 6 seconds to master reset the system if such a situation occurs.

6) SPECIFICATION GENERAL SPECIFICATIONS Display & Update Rate:

Model 22s: 3-3/4 digits 4000 counts; Updates 3 per second nominal Models 25a, 25s & 27s: 3-5/6 digits 6000 counts; Updates 5 per second nominal

Operating Temperature: 0oC ~ 40oC Relative Humidity: Maximum relative humidity 80% for temperature up to 31oC decreasing linearly to 50%

relative humidity at 40oC

Altitude: Operating below 2000m Storage Temperature: -20oC ~ 60oC, < 80% R.H. (with battery removed) Temperature Coefficient: Nominal 0.15 x (specified accuracy)/ oC @ (0oC ~ 18oC or 28oC ~ 40oC), or otherwise

specified

Sensing: Average sensing Pollution Degree: 2 Safety: Meets

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

Transient Protection: 4kV lightning surge (1.2/50s)

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RANGE

Accuracy

6.000V

0.5%+3d

60.00V

1.0%+5d

450.0V

1.2%+5d

600.0V

2.0%+5d

600.0V

1.5%+5d

RANGE

Accuracy

400.0mV

1.0%+2d

4.000V, 40.00V, 400.0V

2.0%+2d

600V

2.5%+4d

Measurement Category:

Models 22s & 27s: CAT II 600V and CAT III 300V Model 25s & 25a: CAT II 450V and CAT III 300V

E.M.C.: Meets EN61326 (1997, 1998/A1), EN61000- 4-2 (1995), & EN61000-4-3 (1996) In an RF Field of 3V/m:

Capacitance function is not specified Other function ranges: Total accuracy = Specified accuracy + 45d

Performance above 3V/m is not specified

Overload Protection:

Models 22s & 27s: 920VDC & VAC rms Model 25s & 25a: 855VDC & VAC rms

Low Battery: Below approx. 2.4V Power Supply: 3V standard button battery x 1 (IEC-CR2032; ANSI-NEDA-5004LC) Power Consumption (typical):

Model 22s, 25s & 25a: 2mA Model 27s: 6mA for Voltage functions on Auto-V position, and 2mA for other functions

APO Consumption (typical): 2.2A APO Timing:

Model 22s: Idle for 30 minutes Model 25a, 25s & 27s: Idle for 3 minutes

Dimension / Weight: L113mm x W53mm x H10.2mm / Approx. 78 gm Special Features:

Model 22s: Data Hold, and 30ms MAX Hold Model 25a, 25s & 27s: AutoCheckTM (Automatic V &  Selection), and EF-Detection

Accessories: Battery installed, and User’s manual Optional Accessories: BH-20R protective holster, and BSC-20 soft carrying pouch

Electrical Specification

Accuracy is given as +/- (% of reading digits + number of digits) or otherwise specified @ 23oC +/- 5oC and less than 75% R.H.

----------------------------------------------------------------------- -----------------------------------------------------------------------DC Voltage (

Models 25a, 25s & 27s)

DCV AutoCheckTM Threshold:

> +1.2VDC or < -0.6VDC nominal

BM25 AutoCheckTM DCV only

BM27 AutoCheckTM DCV only

BM27 Hi-Z DCV only

DC Voltage (

Model 22s)

BM25 Input Impedance:

AutoCheckTM Lo-Z DCV: 160k, 160pF nominal

BM27 Input Impedance:

AutoCheckTM Lo-Z DCV: 833k (4.2k when

displaying “Auto”), 90pF nominal

Hi-Z DCV: 5M, 90pF nominal NMRR: > 30dB @ 50Hz/60Hz CMRR: > 100dB @ DC, 50Hz/60Hz; Rs=1k

NMRR: > 50dB @ 50Hz/60Hz CMRR: > 120dB @ DC, 50Hz/60Hz; Rs=1k Input Impedance: 10 M, 30pF nominal; (1000M

for 400.0mV range)

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RANGE

Accuracy

50Hz -- 60Hz

6.000V, 60.00V, 450.0V

600.0V

1.5%+5d

RANGE

Accuracy

50Hz -- 60Hz

4.000V, 40.00V, 400.0V

2.0%+5d

60Hz -- 500Hz

4.000V, 40.00V, 400.0V

3.0%+5d

50Hz -- 500Hz

600V

3.5%+5d

RANGE

Accuracy

100.0nF, 1000nF, 10.00F,

100.0F

, 2000F

3.5%+6d

RANGE

Accuracy

500.0nF, 5.000F, 50.00F,

500.0F, 3000F

3.5%+6d

RANGE

Accuracy

600.0

2.0%+6d

6.000k

1.2%+6d 2)

60.00K, 600.0K

1.0%+4d

6.000M

2.0%+4d

RANGE

Accuracy

400.0

1.5%+6d

4.000K, 40.00K, 400.0K

1.0%+4d

4.000M

1.5%+4d

40.00M

2.5%+4d

RANGE

Accuracy

Specified at

10.00Hz -- 30.00kHz

1) 2)

0.5%+4d

< 20V Sine-rms

10.00Hz -- 999.9Hz

< 600V Sine-rms

RANGE

Accuracy

5.000Hz -- 1.000MHz

0.5%+4d

Test Current (Typical)

Open Circuit Voltage

0.25mA for BM22

0.48mA for BM27

< 1.6VDC

AC Voltage (Models 25a, 25s & 27s)

CMRR: > 60dB @ DC to 60Hz, Rs=1k BM25 Input Impedance:

AutoCheckTM Lo-Z ACV: 160k, 160pF nominal BM27 Input Impedance:

AutoCheckTM Lo-Z ACV: 833k (4.2k when

displaying “Auto”), 90pF nominal

Hi-Z ACV: 5M, 90pF nominal ACV AutoCheckTM Threshold:

> 1.5VAC (50/60Hz) nominal

Range for BM25 only

Range for BM27 only

AC Voltage (

Model 22s)

Ohms (

Models 25a, 25s & 27s)

Open Circuit Voltage: 0.4VDC typical

AutoCheckTM is for 6.000k ~ 6.000M ranges;

600.0 is an independent range for BM27 only

Add 40d to specified accuracy while reading is below

20% of range

Ohms (

Model 22s)

Input Impedance: 10 M, 30pF nominal CMRR: > 60dB @ DC to 60Hz, Rs=1k

Capacitance (

Accuracy below 50nF is not specified

Accuracies with film capacitor or better

BM25 top range. Updates > 1 minute on large values

BM27 only. Updates > 1 minute on large values

Specified with battery voltage above 2.8V (half full

Models 25a, 25s & 27s)

battery). Accuracy decreases gradually to 12% at

low battery warning voltage of approx 2.4V

Capacitance (

Additional 50.00nF range accuracy is not specified.

Accuracies with film capacitor or better.

Updates > 1 minute on large values

Specified with battery voltage above 2.8V (half full

Model 22s)

battery). Accuracy decreases gradually to 12% at

low battery warning voltage of approx 2.4V

Open Circuit Voltage: 0.4VDC typical

Hz Frequency (

Models 25a

, 25s

& 27s

1) 2)

)

Sensitivity (Sine-rms):

Hz in Auto-V position: > 3V

Line-level Hz in V position (BM27 only):

@ 6.000VAC range: > 3V @ 60.00VAC range: > 6V @ 600.0VAC range: > 60V

Hz Frequency (

Specified at Input Voltage < 20VAC rms

Model 22s)

Input Signal: Sine-wave, or Square-wave with duty

cycle > 40% & < 70%

Sensitivity (V-peak):

5Hz -- 100kHz : > 1.3Vp 100kHz -- 500kHz : > 2.2Vp 500kHz -- 1MHz : > 4.2Vp

Diode Tester (

Models 25a, 25s & 27s only)

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RANGE

Accuracy

Burden Voltage

400.0A

1.5%+3d

6mV/A

2000A

1.2%+3d

6mV/A

RANGE

Accuracy

Burden Voltage

50Hz -- 60Hz

400.0A

2.0%+3d

6mV/A

2000A

1.5%+3d

6mV/A

Threshold Voltage Between

Bar Graph

BM25

BM27

15V & 55V

20V & 80V

30V & 85V

45V & 125V

- -

45V & 145V

70V & 215V

- - -

75V & 190V

120V & 285V

- - - -

105V & up

170V & up

- - - - -

DC A Current (Model 27s only)

Non-Contact EF-Detection (

Models 25a, 25s & 27s)

A Current (Model 27s only)

Indication: Bar graph segments & audible beep tones

proportional to the field strength

Audible Continuity Tester

Open Circuit Voltage: 0.4VDC typical Audible Threshold:

Models 25a, 25s & 27s: between 50 and 300

Model 22s: between 10 and 120

Detection Frequency: 50/60Hz Detection Antenna: Top left corner of the meter Probe-Contact EF-Detection: For more precise

indication of live wires, use the Red (+) probe for direct contact measurements

------------------------------------------------------------------------- ------------------------------------------------------------------------

LIMITED WARRANTY

BRYMEN warrants to the original product purchaser that each product it manufactures will be free from defects in material and workmanship under normal use and service within a period of one year from the date of purchase. BRYMEN's warranty does not apply to accessories, fuses, fusible resistors, spark gaps, batteries or any product which, in BRYMEN's opinion, has been misused, altered, neglected, or damaged by accident or abnormal conditions of operation or handling.

To obtain warranty service, contact your nearest BRYMEN authorized agent or send the product, with proof of purchase and description of the difficulty, postage and insurance prepaid, 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 OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OR MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR USE. BRYMEN WILL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES.

P/N: 7M1C-1281-A000 PRINTED IN TAIWAN

BRYMEN TECHNOLOGY CORPORATION

TEL:+886 2 2226 3396 FAX:+886 2 2225 0025

http://www.brymen.com

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