Data Sheet Handheld Digital Multimeters Test Bench Series High Quality, Ruggedized, Multifunctional High performance and value priced, the Test Bench Series offers more features for the dollar than other multimeters. In addition to measuring voltage and current, 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 Features 392 & 393 391A 390A 389A 388B True RMS - - - Resistance measurement Ranging Auto/Manual Manual Auto/Manual Auto/Manual Manual Frequency measurement DCV Accuracy 0.08% 0.05% 0.1% 0.25% 0.5% Diode check AC/DC Voltage and Current Audible continuity 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 - - All current ranges fused Capacitance Measurement - Auto power off Transistor Test - - - - Ruggedized case Temperature Probe - - - CATIII 1000 V, (all models) Logic Probe - - - Relative Mode - - CATIV 600 V, (392 & 393) Min/Max Hold - - Peak Hold - - Data Hold - USB 393 only - - - Specifications 392 & 393 391A 390A 389A 388B True RMS reading True RMS reading - - - Volts 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 V, 100 mV, 1 mV 10 mV, 100 mV 100 V, 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 1200 VDC or AC rms 1200 VDC or AC rms Overload Protection 1000 VDC or 750 VAC rms 500 VDC/AC rms 15 sec 1100 VDC or AC rms 1000 VDC or peak AC 500 VDC/AC rms 15 sec on 200 mV range on 200 mV range Input Impedance 10 M , 11 M on 6 V range 10 M 400 mV: >100 M , 4V: 10 M 40 V - 1000 V: 9.1 M 10 M Technical data subject to change www.bk precision.com B&K Precision Corp. 2014High Performance DMM Test Bench Series Specifications 392 & 393 391A 390A 389A 388B Current Ranges 600 A, 6000 A, 60 mA, 400 mA, 20 A* 200 A, 2 mA, 20 mA, 200 mA, 20 A* 400 A, 4 mA, 40 mA, 400 mA, 20 A* 400 mA, 4 mA, 40 mA, 400 mA, 2 A, 20 A* Resolution 10 nA, 100 nA, 1 A, 10 A, 1 mA 10 nA, 100 nA, 1 A, 10 A, 1 mA 0.1 A, 1 A, 10 A, 100 A, 10 A 100 nA, 1 A, 10 A,100 A,1 mA,10 mA 600 A to 60 mA: (0.5% rdg + 10 dgt) 400 A - 400 mA:(1% rdg + 400 A - 400 mA: (1% rdg + 1 dgt) 200 A to200 mA:(0.5% rdg + 5 dgt) (1% rdg + 1 dgt) DC Accuracy 400 mA: (1.0% rdg + 10 dgt) 5 dgt) 2 A: (1.5% rdg + 1 dgt) 20 A: (2% rdg + 10 dgt) (2% rdg + 3 dgt) 20 A: (2.0% rdg + 10 dgt) 20 A: (2% rdg + 3 dgt) 20 A: (3% rdg + 3 dgt) 400 A - 400 mA:(1.5% rdg + 1 dgt) 600 A to 400 mA: (1.5% rdg + 20 dgt) 200 A to200 mA:(1.2% rdg + 10 dgt) 400 A to 400 mA:(1.5% rdg + 4 dgt) AC Accuracy 2 A: (2% rdg + 4 dgt) 20 A: (2.5% rdg + 20 dgt) 20 A: (2.5% rdg + 20 dgt) 20 A: (2.5% rdg + 4 dgt) 20 A: (3.5% rdg + 4 dgt) A/mA input: 0.5A/100V fast blow ceramic fuse A/mA input:0.5 A/500 V fast blow ceramic fuse A/mA input: 2 A/600 V fast blow ceramic fuse Input Protection 20A input: 20A/600A fast blow ceramic fuse 20 A input: 20 A/600 A fast blow ceramic fuse 20 A input: 20 A/600 V fast blow ceramic fuse 500 mV on 600 A & 60 mA ranges, Max. Burden Voltage 600 mV (900 mV on 20 A range) 500 mV (2 V on 4 mA, 400 mA ranges) 600 mV (900 mV on 2 A, 20 A ranges) 2 V on 6000 A range Resistance Ranges 600 , 6 k , 60 k , 600 k , 6 M , 60 M 200 2 k ,20 k ,200 k 2 M ,20 M 400 , 4 k , 40 k , 400 k , 4 M , 40 M Resolution 10 m , 100 m , 1 , 10 , 100 , 1 k 10 m ,100 m ,1 ,10 ,100 ,1 k 100 m , 1 , 10 , 100 , 1 k , 10 k 600 : (0.3% rdg + 20 dgt), 400 : (1% rdg + 4 dgt) 200 , 2 M : (0.25% rdg + 10 dgt) 400 to 400 k : (0.5% rdg + 4 dgt) 6 k to 6 M : (0.3% rdg + 10 dgt), 4 k to 4 M : (0.8% rdg + 4 dgt) Accuracy 2 k to 200 k : (0.15% rdg + 3 dgt) 4 M : (1% rdg + 5 dgt) 6 M : (1.0% rdg + 10 dgt), 40 M : (2% rdg + 5 dgt) 20 M : (1.0% + 10 dgt) 40 M : (2% rdg + 5 dgt) 60 M : (3.0% rdg + 20 dgt) -1.2 VDC typical, Open Circuit Voltage 3.2 VDC typical -0.45 VDC typ. (-1.2 VDC on 400 range) 0.6 VDC typ. (3.2 VDC on 400 range) -3.0 VDC typical on 600 range Overload Protection 600 VDC or 600 VAC rms 500 VDC or 500 AC rms Tested at 0.5 mA, 2 VDC max. typical Tested at 1 mA, 3.2 VDC max. typical Tested at 1.2 mA, 3.0 VDC max. typical Tested at 1 mA, 3.2 VDC max. typical Diode Test (2.0% rdg + 10 dgt) accuracy (1% rdg + 10 dgt) accuracy (1.5% rdg + 3 dgt) accuracy (1.5% rdg + 3 dgt) accuracy Transistor Test (hFE) Does not apply Does not apply Does not apply hFE range: 0 - 1000,hFE base current:10 ADC Capacitance Ranges 6 nF, 60 nF, 600 nF, 6 F, 60 F, 600 F, 6 mF - 4 nF. 40 nF, 400 nF, 4 F, 40 F, 400 F, 4 mF, 40 mF 4 nF. 40 nF, 400 nF, 4 F, 40 F Resolution 1 pF, 10 pF, 100 pF, 1 nF, 10 nF, 100 nF, 1 F - 1 pF, 10 pF, 100 pF, 1 nF, 10 nF, 100 nF, 1 F, 10 F 0.1 pF, 1 pF, 10 pF, 100 pF, 1 nF 6 nF: (3% rdg+30 dgt), 60 nF to 600 F: (3% 4 nF: (3% rdg+20 dgt) 4 nF to 40 F: (3% rdg +5dgt) Accuracy - (3% rdg + 4 dgt) rdg +10dgt), 6 mF: (5% rdg+10 dgt) 400 Fto 40 mF: (5% rdg + 10 dgt) Test Voltage <1 V - <1V <3.5 V Overload Protection 600 VDC or 600 VAC rms - 500 VDC or AC rms Frequency 60 Hz, 400 Hz, 6 kHz, 60 kHz, Ranges 2 kHz, 20 kHz, 200 kHz 4 kHz, 40 kHz, 400 kHz, 4 MHz, 40 MHz 4 kHz, 40 kHz, 400 kHz, 4 MHz 600 kHz, 6 MHz, 10 MHz 0.0001Hz, 0.01 Hz, 0.1 Hz, 1 Hz, Resolution 0.1 Hz, 1 Hz, 10 Hz 1 Hz, 10 Hz, 100 Hz, 10 kHz, 100 kHz 1 Hz, 10 Hz, 100 Hz, 10 kHz 10 Hz, 100 Hz, 1 kHz Accuracy (0.1% rdg + 10 dgt) (0.1% rdg + 3 dgt) (0.1% rdg + 3 dgt) (0.25% + 4 dgt) (0.1% + 2 dgt) 50 mVrms min. (At>30 & <70% duty 1 Hz - 4 MHz: 1Vrms 250 mVrms min. on 10 Hz to 1 MHz Sensitivity >100 ns cycle: 400 mVrms min.) 4 MHz - 40 MHz: >2 Vrms, <5 Vrms 500 mVrms min. on 1 MHz to 4 MHz Minimum Pulse Width >25 ns >25 ns >25 ns >2 s Duty Cycle Limits >30% & <70% >30% & <70% >30% & <70% Minimum Input Range >0 Hz 2kHz:10Hz:20kHz:>60dgt 200kHz>60dgt - - - Overload Protection 600 VDC or 600 VAC rms 500 VDC or 500 AC rms Logic Test Logic Threshold - Hi: 2.80.8 V, Lo: 0.8 0.5 V - - Hi: 2.80.8 V, Lo: 0.8 0.5 V Frequency Response - 20 MHz - - 20 MHz Pulse Width - 25 ns - - 25 ns Pulse Limits - >20% and <80% - - >20% and <80% Indication - 40 ms beep at logic 1 (Hi) - - 40 ms beep at logic 1 (Hi) Overload Protection - 500 V DC or 500 AC rms - - 500 V DC or 500 AC rms Temperature -58 to +2372F, 0.1F, -58 to +2372F, 1F, Range, Resolution - - - (-50to + 1300C, 0.1C) (-50to + 1300C, 1C) (2.0% rdg + 6F) -58F to 32F & 750F to 2372F, (1.0% rdg + 2F) 32F to 750F (0.8% rdg + 2C) -50 - 400C, - Accuracy - - (2.0% rdg + 3C) -50 to 0C & 400C to 1300C, (1% rdg + 2C) 400 - 1300C (1.0% rdg + 1C) 0C to 400C Duty Cycle Range, Resolution 5 to 95%, 0.1% 0 to 90%, 0.1% - - - Accuracy (5V logic) (2.0% rdg + 10 dgt) (2.0% rdg + 10 dgt) - - - Minimum Pulse Width 10 s 10 s - - - Frequency Range 40 Hz to 20 kHz 40 Hz to 20 kHz - - - Overload Protection 600 VDC or 600 VAC rms 500 VDC or 500 AC rms - - - General Display 60000 count, 4 5/6 digit LCD 20000 count, 4 1/2 digit LCD 4000 count, 3 3/4 digit LCD with 41 segment analog bar graph 4000 count, 3 3/4 digit LCD Polarity Automatic, positive implied, negative polarity indication Operating Temperature 32 to 122 (0 to 50C), 0 to 70% R.H. Dimensions (HxWxD) 7.8 x 3.5 x 1.57 (198 x 90 x 40 mm) Weight 14.1 oz. (400 g) 11.3 oz. (320 g) Three-Year Warranty Included Accessories 9 V battery, test leads, instruction manual, thermocouple probe (models 390A, 392, & 393), software and USB interface cable (models 390A & 393) * 10 A continuous, 20 A for 30 seconds maximum 2 www.bk precision.com v050614