Multiméter UNI-T UT139B

Description
The UNI-T UT139B is a new professional multimeter with True RMS classification and CAT III 600V protection designed for the needs of electricians to measure LV distribution networks in buildings. Innovative and industrial design with protective sleeve ensures impact resistance of the multimeter. The instrument includes a number of extra features such as low impedance voltage measurement (LoZ) (for variants UT139E + UT139S), variable frequency voltage measurement (VFC) (for variants UT139E + UT139S), contactless voltage measurement (NCV), capacitor capacitance measurement, frequency ratio measurement, or temperature measurement. Large and well-arranged LCD TN backlit display ensures better display of measured values. The display range is ± 4000, for capacitance and frequency 9999. Refresh rate 2 to 3 times per second. The fuses are protected by tube fuses (range 10A fuse FF 10A H / 600V (6 x 25mm); range mA / µA fuse FF 500mA H / 600V (6 x 32mm)). The multimeter is powered by two AA 1.5V alkaline batteries. The measuring range can be selected automatically or manually. Included are test leads with spikes and batteries.

UT139B is an ideal choice if you want a professionally equipped multimeter with a number of extra features that is also accurate, safe, easy to read and use.

Product parameters (multimeter function) :

- true RMS (the device measures the effective value of alternating current and voltage)
- AC voltage ranges measurement (AC) : 40 mV / 600 V
- AC current ranges measurement (AC) : 400 μA / 10 A
- DC voltage ranges measurement (DC) : 40 mV / 600 V
- DC current ranges measurement (DC) : 400 μA / 10 A
- resistanceranges measurement - 400 Ω / 60 MΩ
- ranges Capacitor capacitance measurement : 9,999 nF / 99.99 mF
- relative capacitance measurement mode (REL)
- test of diodes and semiconductor transitions at 3.2V
- line continuity test (buzzer)
- non-contact voltage measurement (NCV)
- duty cycle (DCL)
- automatic and manual range selection
- detection of reversed polarity
- data hold
- display of minimum and maximum values
- display backlight
- automatic shutdown when idle
- low battery indication
- overload protection, fuse protected

Technical parameters:

- DC voltage measurement ( vstupní impedance podle rozsahu 3 až cca 10MΩ ) :
(range / resolution / accuracy )
40.00 mV / 0.01mV / ±0.7 % + 3
400.0 mV / 0.1 mV / ± 0.5 % + 2
4.000 V / 1 mV / ± 0.7 % + 3
40.00 V / 0.01 V / ± 0.7 % + 3
400.0 V / 0.1 V / ± 0.7 % + 3
600.0 V / 1 V / ± 0.7 % + 3

- AC voltage measurementí ( input impedance cca 10MΩ ) :
( range / resolution / accuracy )
40.00 mV / 0.01 mV / ± 1.0 % + 3
400.0 mV / 0.1 mV / ± 1.0 % + 3
4.000 V / 0.001 V / ± 0.8 % + 3
40.00 V / 0.01 V / ± 0.8 % + 3
400.0 V / 0.1 V / ± 0.8 % + 3
400.0 V / 0.1 V / ± 0.8 % + 3
VFC 200 až 600.0 V / 0.1V/1V / ± 4.0 % + 3



- DC current measurement :
( range / resolution / accuracy )
400.0 μA / 0.1 μA / ± 0.7 % + 2
4000 μA / 1 μA / ± 0.7 % + 2
40.00 mA / 0.01 mA / ± 0.7 % + 2
400.0 mA / 0.1 mA / ± 0.7 % + 2
4.000 A / 0.001 A / ± 1.0 % + 3
10.00 A / 0.01 A / ± 1.0 % + 3


- AC current measurement :
( range / resolution / accuracy )
400.0 μA / 0.1 μA / ± 1.0 % + 3
4000 μA / 1 μA / ± 1.0 % + 3
40.00 mA / 0.01 mA / ± 1.0 % + 3
400.0 mA / 0.1 mA / ± 1.0 % + 3
4.000 A / 0.001 A / ± 1.2 % + 3
10.00 A / 0.01 A / ± 1.2 % + 3


- Resistance measurement :
( range / resolution / accuracy )
400.0 Ω / 0.1 Ω / ± 1.0 % + 2
4.000 kΩ / 0.001 kΩ / ± 0.8 % + 2
40.00 kΩ / 0.01 kΩ / ± 0.8 % + 2
400.0 kΩ / 0.1 kΩ / ± 0.8 % + 2
4.000 MΩ / 0.001 MΩ / ± 1.2 % + 3
40.00 MΩ / 0.01 MΩ / ± 1.5 % + 5


- Capacitance measurement :
( range / resolution / accuracy )
9.999 nF / 1 pF / při REL módu ± 4 % + 10
99.99 nF až 999.9 µF / 0.01 nF až 0.1 µF / ± 4 % + 10
9.999 mF až 99.99 mF / 0.001 mF až 0.01 mF / ± 10 %


- Frequency and duty cycle measurement :
( range / resolution / accuracy )
9.999 Hz až 9.999 MHz / 0.001 Hz až 0.001 MHz / ± 0.1 % + 4
0.1 % až 99.9 % / 0.1 % / Reference only

- Display Type : LCD TN
- Display diagonal : 68 mm
- Sampling frequency : 3 / s
- Number of digit : 4000
- Power supply : 2 x AA 1.5 V batteries
- Device dimensions : 170 x 80 x 48 mm
- Resistance to fall : 1 m
- Weight : approx. 354 g (including batteries)
- Operating temperature : - 10 to 50 ° C
- The device meets the standards :
cETLus, CAT III 600V, double insulation, overload protection 600V-PTC, pollution class II
EN 61326-1: 2013; EN 61326-2-2: 2013
EN 61010-1: 2010; EN 61010-2-030: 2010; EN 61010-2-033: 2012
Conforms to UL STD .: 61010-1, 61010-2-030
Certified to CSA STD. C22.2 No. 61010-1, 61010-2-030, 61010-2-033