High performance and value priced, the Test Bench

the meters also measure capacitance, frequency and temperature, and include component test, diode test and logic indicator capabilities. See the chart below for

the meter that best fits your needs. A double injection molded case provides improved grip and protection for the meters.

Features and Benefits

I

Resistance measurement

I

Frequency measurement

I

Diode check

I

Audible continuity

I

All current ranges fused

I

Auto power off

I

Ruggedized case

I

CATIII 1000 V, (all models)

I

CATIV 600 V, (392 & 393)

Handheld Digital Multimeters

Data Sheet

www.bkprecision.com

Technical data subject to change

© B&K Precision Corp. 2017

High Quality, Ruggedized, Multifunctional

Features

392 & 393

391A

390A

389A

388B

True RMS

√

√

-

-

-

Ranging

Auto/Manual

Manual

Auto/Manual

Auto/Manual

Manual

DCV Accuracy

0.08%

0.05%

0.1%

0.25%

0.5%

AC/DC Voltage and Current

√

√

√

√

√

Display Digits, Count

60000, 4 5/6

20000, 4 1/2

4000, 3 3/4

4000, 3 3/4

4000, 3 3/4

Bar Graph

√

-

√

√

-

Capacitance Measurement

√

-

√

√

√

Transistor Test

-

-

-

-

√

Temperature Probe

√

-

√

-

-

Logic Probe

-

√

-

-

√

Relative Mode

√

-

√

√

-

Min/Max Hold

√

-

√

√

-

Peak Hold

√

-

√

√

-

Data Hold

√

√

√

√

-

USB

393 only

-

√

-

-

Specifications

392 & 393

391A

390A

389A

388B

Volts

True RMS reading

True RMS reading

-

-

-

DC Ranges

600 mV, 6 V, 60V, 600 V, 1000 V

200 mV, 2 V, 20 V, 200 V, 1,000 V

400 mv, 4 V, 40 V, 400 V, 1000 V

AC Ranges

600 mV, 6 V, 60V, 600 V, 750 V

200 mV, 2 V, 20 V, 200 V, 750 V

400 mv, 4 V, 40 V, 400 V, 750 V

Resolution

0.01 mV, 0.1 mV, 1 mV, 10 mV, 100 mV

10 µV, 100 mV, 1 mV 10 mV, 100 mV

100 µV, 1 mV, 10 mV, 100 mV, 1 V

Basic DC Accuracy

±(0.08% rdg + 5 dgt)

±(0.05% + 3 dgt)

±(0.1% rdg + 2 dgt)

±(0.25% rdg + 2 dgt)

±(0.5% rdg + 1 dgt)

Basic AC Accuracy

±(1.5% rdg + 20 dgt) 500 Hz -1 kHz

±(2% + 10 dgt) 500 Hz - 2 kHz

±(1.5% rdg +5 dgt) 500 Hz - 1 kHz

±(1.5% rdg +3 dgt) 500 Hz - 1 kHz

Overload Protection

1000 VDC or 750 VAC rms

1200 VDC or AC rms

500 VDC/AC rms 15 sec

on 200 mV range

1100 VDC or AC rms

1000 VDC or peak AC

1200 VDC or AC rms

500 VDC/AC rms 15 sec

on 200 mV range

Input Impedance

10 M

Ω, 11 MΩ on 6 V range

10 M

Ω

400 mV: >100 M

Ω, 4V: 10 MΩ

40 V - 1000 V: 9.1 M

Ω

10 M

Ω