BS91 is a clamp meter that performs TRMS measurement of AC current up to 400A, AC/DC voltage, frequency, resistance and continuity.

This model also perform measures of Active power, Reactive power, Apparent power, Power Factor, cosphi, Energy, voltage and current harmonics, both in single phase and three phase balanced systems and have a patented phase rotation measures with an innovative one wire method.

Thanks to the practical rubber cap to be mounted on the jaws (patented also), it's possible to hold test leads while measuring and have one hand free to work.

The large 4 digit LCD display (10000 counts) with backlight permits an easy readability also in critical visual conditions.

The instrument is complying with EN 61010-1, CAT III 600V and is ideal to solve typical problems occurring in industrial environments such as troubleshooting, non-linear loads, frequency driven motors, PCs.

Features: 

- TRMS measurement

- AC current up to 400 A

- AC voltage up to 600 V

- DC voltage up to 600 V

- Resistance up to 2000 Ohm

- Frequency with test leads and jaws up to 400 Hz

- Phase sequence with one wire

- Phase coincidence with one wire

- Active, Reactive, Apparent power on Single/Three phase balanced systems

- Active, Reactive, Apparent energy on Single/Three phase balanced systems

- Power Factor, cosphi on Single/Three phase balanced systems

- Harmonic voltage up to 25th with THD%

- Harmonic current up to 25th with THD%

- Continuity test

- Autorange

- Backlight

- Automatic polarity indication

- Auto Power OFF

- Data HOLD function

- MAX/MIN/AVG function

- Fast PEAK function (1ms)

- Low battery indication

Technical Specifications:

Accuracy is given as ± (% of reading + no. of least significant digits) at 23°C ± 5°C, with relative humidity Less than 80% R.H.

DC VOLTAGE 

Input Impedance: 1MΩ 

AC VOLTAGE (TRMS)

Input Impedance: 1 MΩ; Max crest factor: 1.5

AC/DC VOLTAGE : MAX / MIN / AVG/ PEAK MEASUREMENT

AC CURRENT (TRMS)

Max crest factor: 2

AC CURRENT:PEAK MEASUREMENT

RESISTANCE

FREQUENCY (TEST LEADS / CLAMP’S JAWS) 

Voltage range: 0.5 ~ 600V (test leads)

Current range: 0.5 ~ 400A (clamp’s jaws)

ACTIVE POWER, REACTIVE POWER, APPARENT POWER

Accuracy defined for: sine waves, voltage 100V-600V, current ≥ 1A, Freq. 50-60Hz, Power Factor: 0.8i ~ 0.8c

POWER FACTOR 

Current range for Power Factor measurement ≥ 2A

VOLTAGE & CURRENT HARMONICS

PHASE ROTATION TEST AND PHASE COINCIDENCE TEST*

Frequency range：40～69Hz

(*):Measure executed in following normally conditions: instrument handle hard, standard shoes, standard floors, etc.

AUDIBLE CONTINUITY TEST

Overload protection: 600V RMS 

General Specifications: 

Display: 

Features:                                        The liquid crystal display (LCD) is 4 digits with maximum reading 9999 counts.

Measuring rate:                               64 samples/period

General information: 

Max .diameter conductor size :        30mm

Working Environmental Conditions:  

Reference temperature:                    23°C ± 5°C

Working temperature:                      5°C ~ 40°C

Allowed relative humidity:                < 80% RH

Storage temperature:                       -10°C ~ 60°C

Storage humidity:                            < 70% RH

Power Supply: 

Batteries:                                        2 x 1.5V IEC R03 AAA carbon-zinc or alkaline type batteries                                    

Low battery indicator:                      The "" appears when the battery voltage drops is low

Battery life:                                     about 90 hours

Mechanical Features: 

Dimensions:                                    205(H) x 64(W) x 39(L) mm

Weight (batteries included):              about 280g 

General Reference Standards： 

Safety of measuring instruments:      EN61010

Insulation:                                       2(double insulation)

Pollution degree:                             2                  

LVD:                                               EN61010-1 CAT III 600V

Use:                                               max altitude 2000m

EMC:                                              EN60326

Accessories:  

- Couple of test leads

- Couple of crocodile test leads

- Soft carrying case

- Rubber holder for test leads

- User's manual English

Standards

- CE mark

- EN 61010-032

- EN 61010-1

- EN 61036