BK391ABK391A万用表

 

Specifications

Model 391A

Volts

True RMS reading

DC Ranges

200 mV, 2V, 20V, 200V, 1000V

AC Ranges

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

Resolution

10uV, 100mV, 1mV 10 mV, 100 mV

DC Accuracy

+-(0.05% + 3 dgt)

AC Accuracy

+-(1%+10 dgt.) 50 Hz - 500 Hz

 

+-(2% + 10 dgt.) 500 Hz - 2 kHz

 

500 Hz on 750V range

Overload Protection

1200VDC or AC rms

 

500VDC/AC rms 15 sec

 

on 200mV range

Input Impedance

10 MΩ

Current

True RMS reading

Ranges

200 uA, 2 mA, 20 mA, 200 mA, 20A*

Resolution

10nA, 100 nA, 1 uA, 10 uA, 1 mA

DC Accuracy

200 uA to 200 mA: +-(0.5% rdg + 5 dgt.) 20 A: +-(2% rdg + 10 dgt.)

AC Accuracy

200 uA to 200 mA: +-(1.2% rdg + 10 dgt.)
20A: +-(2.5% rdg + 20 dgt.)

Input Protection

uA/mA Input:
0.5A/500V fast blow ceramic fuse
20A input:
20A/600A fast blow ceramic fuse

Max. Burden Voltage

600mV (900 mV on 20A range)

Resistance

 

Ranges

200Ω, 2kOhm, 20 kOhm, 200 kOhm, 2 MOhm, 20 MOhm

Resolution

10 mΩ, 100 mOhm, 1 Ohm, 10 Ohm, 100 Ohm, 1 kOhm

Accuracy

200 Ω, 2 MOhm: +-(0.25% rdg + 10 dgt.)
2 kΩ to 200 kOhm: +-(0.15% rdg + 3 dgt.)
20 MΩ: +-(1.0% + 10 dgt.)

Open Circuit Voltage

3.2 VDC typ.

Overload Protection

500 VDC or AC rms

Diode Test

Tested at 1 mA, 3.2 VDC max. typ.
+-(1% rdg + 10 dgt.) accuracy

Transistor Test (hFE)

Does not apply

Capacitance

 

Ranges

Does not apply

Resolution

 

Accuracy

 

Test Voltage

 

Overload Protection

 

Frequency

 

Ranges

2 kHz, 20 kHz, 200 kHz

Resolution

0.1 Hz, 1 Hz, 10 Hz

Accuracy

+-(0.1% rdg + 3 dgt.)

Sensitivity

50 mV rms min. (@>30 & <70% duty cycle: 400 mV rms min.)

Minimum Pulse Width

> 25 ns

Duty Cycle Limits

> 30% & <70%

Minimum Input Range

2 kHz: 10Hz: 20 kHz: > 60 dgt; 200 kHz > 60 dgt

Overload Protection

500 VDC or AC rms

Logic Test

 

Logic Threshold

Hi=2.8+-0.8V, 0=0.8 +-0.5V

Frequency Response

20 MHz

Pulse Width

25 ns

Pulse Limits

> 20% and < 80%

Indication

40m sec beep at logic 1 (Hi)

Overload Protection

500 V DC or AC rms

Temperature

 

Range, Resolution

Does not apply

Accuracy

 

Duty Cycle

 

Range, Resolution

0 to 90%, 0/1%

Accuracy (5V logic)

+-(2.0% + 10 dgt.)

Minimum Pulse Width

10 us

Frequency Range

40 Hz to 20 kHz

Overload Protection

500 VDC or AC rms

General

 

Display

20000 count, 4 1/2 digit LCD

Polarity

Automatic, positive implied, negative polarity indication

Operating Temperature

32 0 to 122 0 (0 0 to 50 0 C), 0 to 70% R.H.

Dimensions (HxWxD)

7.8x3.5x1.57'' (198x90x40 mm)

Weight

11.3 oz. (320g)

Three Year Warranty

Accessories

SUPPLIED: 9V Battery, Test Leads, Instruction Manual, Thermocouple Probe (Model 390)
OPTIONAL: TL-2A Deluxe Test Leads, TL-3 Accessory Tip Kit (for TL-2A), PR-28A High Voltage Probe (40kVDC), TL-130A General Purpose DMM Kit
Carrying Case (not included): LC-29B

*10 A continuous, 20A for 30 seconds max.