Fluke 18B+ Digital Multimeter

AC volts 
(40 Hz to 500Hz)¹

4.000 V
40.00 V
400.0 V
1000 V

0.001 V
0.01 V
0.1 V
1 V

1.0 % + 3

DC volts

4.000 V
40.00 V
400.0 V
1000 V

0.001 V
0.01 V
0.1 V
1 V

0.5 % + 3

AC millivolts

400.0 mV

0.1 mV

3.0 % + 3

DC millivolts

400.0 mV

0.1 mV

1.0 % + 10

Diode test²

2.000 V

0.001 V

10%

Resistance 
(Ohms)

400.0 Ω
4.000 kΩ
40.00 kΩ
400.0 kΩ
4.000 MΩ
40.00 MΩ

0.1 Ω
0.001 kΩ
0.01 kΩ
0.1 kΩ
0.001 MΩ
0.01 MΩ

0.5 % + 3
0.5 % + 2
0.5 % + 2
0.5 % + 2
0.5 % + 2
1.5% + 3

Capacitance³

40.00 nF
400.0 nF
4.000 μF
40.00 μF
400.0 μF
1000 μF

0.01 nF
0.1 nF
0.001 μF
0.01 μF
0.1 μF
1 μF

2 % + 5
2 % + 5
5 % + 5
5 % + 5
5 % + 5
5 % + 5

Frequency¹
Hz
(10 Hz – 100 kHz)

50.00 Hz
500.0 Hz
5.000 kHz
50.00 kHz
100.0 kHz

0.01 Hz
0.1 Hz
0.001 kHz
0.01 kHz
0.1 kHz

0.1 % + 3

Duty Cycle¹

1 % to 99 %

0.1 %

1 %

AC current μA
(40 Hz to 400 Hz)

400.0 μA
4000 μA

0.1 μA
1 μA

1.5 % + 3

AC current mA
(40 Hz to 400 Hz)

40.00 mA
400.0 mA

0.01 mA
0.1 mA

1.5 % + 3

AC current A
(40 Hz to 400 Hz)

4.000 A
10.00 A

0.001 A
0.01 A

1.5 % + 3

DC current μA

400.0 μA
4000 μA

0.1 μA
1 μA

1.5 % + 3

DC current mA

40.00 mA
400.0 mA

0.01 mA
0.1 mA

1.5 % + 3

DC current A

4.000 A
10.00 A

0.001 A
0.01 A

1.5 % + 3

Maximum voltage between any terminal and earth ground

1000 V

Display (LCD)

4000 counts, updates 3/sec

Battery type

2 AA, NEDA 15A, IEC LR6

Battery life

500 hours minimum (50 hours in LED Test mode without load. The hours with load depends on the type of LED under test.)

Temperature

Operating

0 °C to 40 °C

Storage

-30 °C to 60 °C

Relative Humidity

Operating humidity

Non-condensing (<10°C)
≤90% RH at 10 °C to 30 °C; 
≤75% RH at 30 °C to 40 °C

40 MΩ range
≤80% RH at 10 °C to 30 °C; 
≤70% RH at 30 °C to 40 °C

Altitude

Operating

2000 m

Storage

12,000 m

Temperature coefficient

0.1 X (specified accuracy) /°C (<18 °C or >28 °C)

Fuse protection for current inputs

440 mA, 1000 V Fast Fuse, Fluke specified part only.
11A, 1000V Fast Fuse, Fluke specified part only.

Size (HxWxL)

183 x 91 x 49.5 mm

Weight

455 g

IP rating

IP 40

Safety

IEC 61010-1, IEC61010-2-030 CAT III 600 V, CAT II 1000 V, Pollution Degree 2

Electromagnetic environment

IEC 61326-1: Portable

Electromagnetic compatibility

Applies to use in Korea only