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BK Precision 393B 100000 Count True RMS Handheld Digital Multimeter

BK Precision 393B 100000 Count True RMS Handheld Digital Multimeter

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SKU
393B
Manufacturer:
B&K Precision
B&K Precision

Key Features:

  • DCV, ACV, AC+DC, DCI, ACI, resistance, capacitance, frequency, diode, temperature, and continuity measurement functions
  • True RMS AC and AC+DC measurements
  • Up to 100,000-count, dual display
  • dB, dBm, limits, peak-hold, REL (delta), MIN, MAX, and average math functions
  • HFR (High Frequency Rejection) mode applies a low pass filter for AC measurements (800 Hz cut-off)
  • Isolated USB interface with operating software for remote data logging
  • Dirt and water-resistant housing with rubberized protective case
  • CAT III 1000 V / CAT IV 600 V protection
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$580.00

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The BK Precision 393B is a True RMS multimeter with an 100,000 display count. The 393B DCV accuracy is ± (0.015% + 20 digits) and it has 20,000 readings of data log capacity.

Specifications are based on the following conditions/assumptions:

  • • Accuracy specifications: ± (% of reading + counts of least significant digit) at 23 °C ± 5 °C, with relative humidity less than 80% RH One year calibration cycle
    • Temperature coefficient is 0.1 x (specified accuracy)/°C for T < 18 °C, T > 28°C
    • AC Voltage and AC Current specifications are AC coupled, true RMS
    • For non-sinusoidal waveforms:
         - Add 1.0% to accuracy specification for Crest Factor 1.0 to 2.0
         - Add 2.5% to accuracy specification for Crest Factor 2.0 to 2.5
         - Add 4.0% to accuracy specification for Crest Factor 2.5 to 3.0
    • For best accuracy use REL (delta) function to compensate the offsets

DC Voltage

ModelRangeResolutionAccuracy





390B		40.00 mV1 μV0.03 + 3
400.0 mV10 μV



0.03 + 1
4.000 V100 μV
40.00 V1 mV
400.0 V10 mV
1000 V100 mV




391B		40.000 mV1 μV0.040 + 40
400.00 mV10 μV0.035 + 20
4.000 V100 μV


0.030 + 20
40.000 V1 mV
400.00 V10 mV
1000.0 V100 mV




393B		100.000 mV1 μV0.025 + 40
1000.00 mV10 μV0.020 + 20
10.0000 V100 μV

0.015 + 20
100.000 V1 mV
1000.00 V10 mV

 

DC Current

ModelRangeResolutionAccuracy



390B		40.00 mA1 μA

0.2 + 1
400.0 mA10 μA
4.000 A100 μA
10.00 A1 mA0.2 + 2



391B		40.000 mA1 μA
0.2 + 40
400.00 mA10 μA
4.0000 A100 μA
0.2 + 80
10.000 A1 mA


393B		10.0000 mA0.1 μA
0.1 + 40
100.000 mA1 μA
10.0000 A100 μA0.1 + 80

- Burden Voltage: 2 mV/mA at mA inputs and 60 mV/A at A inputs
- Max. Continuous Measuring Time: 10 minutes at mA inputs, 1 minute at A inputs
- Min. Rest Time: 20 minutes after continuous measuring
- Overload protection: AC/DC 400 mA at mA inputs, AC/DC 10 A at A inputs

 

Continuity

ModelRangeResolutionAccuracy
390B400.0 Ω0.1 Ω0.2 + 2
391B & 393B400.00 Ω0.01 Ω0.2 + 30

- Open Circuit Voltage: -1.2 V
- Short Test Current: -0.3 mA
- Threshold: Adjustable 10 Ω to 50 Ω
- Buzzer Response Time: < 10 ms

 

Diode Test

ModelRangeResolutionAccuracy
390B2.000 V1 mV1.5 + 2
391B & 393B2.0000 V100 μV1.5 + 20

 

Resistance

ModelRangeResolutionAccuracy




390B		400.0 Ω0.1 Ω0.2 + 2
4.000 kΩ1 Ω

0.2 + 1
40.00 kΩ10 Ω
400.0 kΩ100 Ω
4.000 MΩ1 kΩ1.0 + 1
40.00 MΩ10 kΩ2.0 + 20




391B		400.00 Ω0.01 Ω

0.2 + 30
4.0000 kΩ0.1 Ω
40.000 kΩ1 Ω
400.00 kΩ10 Ω0.3 + 30
4.0000 MΩ100 Ω1.0 + 30
40.000 MΩ1 kΩ1.5 + 30




393B		1000.00 Ω0.01 Ω0.050 + 30
10.0000 kΩ0.1 Ω
0.025 + 30
100.000 kΩ1 Ω
1000.00 kΩ10 Ω0.3 + 30
10.0000 MΩ100 Ω1.0 + 30
40.000 MΩ1 kΩ1.5 + 30

 

True RMS AC Voltage

ModelRangeFrequencyAccuracy


390B

40.00 mV(1), 400.0 mV(1), 4.000 V, 40.00 V, 400.0 V(1), 1000 V(2)		40 Hz to 70 Hz(3)0.5 + 2
70 Hz to 1 kHz(3)1.5 + 4
1 kHz to 5 kHz(3)3.0 + 4
5 kHz to 100 kHz(4) (5)5.0 + 20










391B

40.000 mV, 400.00 mV		40 Hz to 65 Hz1.00 + 50
65 Hz to 1 kHz3.00 + 50
1 kHz to 3 kHz5.00 + 50




4.0000 V, 40.000 V		40 Hz to 45 Hz1.50 + 50
45 Hz to 65 Hz0.70 + 50
65 Hz to 1 kHz1.50 + 50
1 kHz to 10 kHz3.00 + 50
10 kHz to 50 kHz5.00 + 50
50 kHz to 100 kHz10.0 + 50

400.00 V, 1000.0 V		40 Hz to 45 Hz1.50 + 50
45 Hz to 65 Hz0.70 + 50
65 Hz to 1 kHz1.50 + 50











393B
100.000 mV, 1000.00 mV		40 Hz to 65 Hz0.70 + 50
66 Hz to 1 kHz1.50 + 50
1 kHz to 3 kHz3.00 + 50




10.0000 V, 100.000 V		40 Hz to 45 Hz1.00 + 50
45 Hz to 65 Hz0.40 + 50
65 Hz to 1 kHz1.00 + 50
1 kHz to 10 kHz2.00 + 50
10 kHz to 20 kHz3.00 + 50
20 kHz to 50 kHz5.00 + 50
50 kHz to 100 kHz10.0 + 50

1000.00 V		40 Hz to 45 Hz1.00 + 50
45 Hz to 65 Hz0.40 + 50
65 Hz to 1 kHz1.00 + 50

(1) The bandwidth is 40 Hz to 5 kHz
(2) The bandwidth is 40 Hz to 1 kHz
(3) Below 10% of range, add 2 digits to accuracy
(4) Below 10% of range, add 10 digits to accuracy, < 50 kHz
(5) Below 10% of range, add 20 digits to accuracy, > 50 kHz

 

True RMS AC Current

ModelRangeFrequencyAccuracy


390B

40.00 mA, 400.0 mA, 4.000 A, 10.00 A		40 Hz to 70 Hz0.8 + 2
70 Hz to 1 kHz
2.0 + 4
1 kHz to 10 kHz

391B
40.000 mA, 400.00 mA, 4.0000 A, 10.000 A		40 Hz to 65 Hz0.8 + 80
65 Hz to 1 kHz3.0 + 80

393B
10.0000 mA, 100.000 mA, 10.0000 A		40 Hz to 65 Hz0.7 + 80
65 Hz to 1 kHz2.0 + 80

- Below 5% of range, add 70 digits to accuracy
- Max. Continuous Measuring Time: 10 minutes at mA inputs, 1 minute at A inputs
- Min. Rest Time: 20 minutes after continuous measuring
- Overload Protection: AC/DC 400 mA at mA inputs, AC/DC 10 A at A inputs

 

Frequency

ModelRangeResolutionAccuracy


390B		400.0 Hz0.1 Hz

1 digit (3 3/4-digit mode)
5 digit (4 3/4-digit mode)
4.000 kHz1 Hz
40.00 kHz10 Hz
100.0 kHz100 Hz




391B & 393B		40.000 Hz0.001 Hz



0.1 + 10
400.00 Hz0.01 Hz
4.0000 kHz0.1 Hz
40.000 kHz1 Hz
100.00 kHz10 Hz

 

Temperature

ModelRangeResolutionAccuracy

390B		-200 °C to 1200 °C0.1 °C1.0 + 10 °C
-328 °F to 2192 °F0.1 °F1.0 + 18 °F



391B & 393B		-200 °C to 10.0 °C0.1 °C1.0 + 2 °C
-10.1 °C to 1200 °C0.1 °C1.0 + 1 °C
-328 °F to 50.0 °F0.1 °F1.0 + 4 °F
-50.1 °F to 2192 °F0.1 °F1.0 + 2 °F

- Specified after 60 minutes of warm-up time
- Specification does not include error of the thermocouple probe

 

Supplementary Functions

ModelFunctionRangeAccuracy



390B		AC + DC


Same as voltage and current		AC accuracy ± 1.0%
HFRAC accuracy ± 1.0% for 40 Hz to 400 Hz
Peak HoldAC accuracy ± (3.0% + 200 digits) for 40 Hz to 1 kHz





391B & 393B		AC + DCSame as AC functionAC accuracy ± 1.0%
HFRSame as AC functionAC accuracy ± 1.0% for 40 Hz to 400 Hz
Peak Hold391B: Same as AC function x 1.25
393B: Same as AC function x 0.125		AC accuracy ± (3.0% + 100 digits) for 40 Hz to 500 Hz
dB120.00 dBNot specified
dBm (600 Ω)120.00 dBmNot specified

 

Capacitance

ModelRangeResolutionAccuracy






390B		40.00 nF10 pF0.9 + 20
400.0 nF100 pF0.9 + 10
4.000 μF1 nF

0.9 + 2
40.00 μF10 nF
400.0 μF100 nF
4.000 mF1 μF0.9 + 10
40.00 mF10 μF0.9 + 20






391B & 393B		4.0000 nF0.1 pFNot specified
40.000 nF1 pF1.2 + 200
400.00 nF10 pF


0.8 + 20
4.0000 μF100 pF
40.000 μF1 nF
400.00 μF10 nF
4.0000 mF(1)100 nF1.2 + 200
40.000 mF(1)1 μF1.2 + 400

(1) Available in manual range selection only

 

General

Model390B391B393B
Display4,000 / 40,000 count10,000 / 100,000 count
Measurement Speed10 times per second3 times per second
Data Log Capacity40,000 measurements20,000 measurements
ConnectivityIR-USB and Bluetooth (class 2)IR-USB
Power4 x 1.5 V AA size batteries
Battery Life (typical)50 hours100 hours
Auto Power OffAdjustable up to 30 minutes or never
Low Battery Indicator√
OverrangeOL or -OL is displayed

Temperature		Operating14 ºF to 122 ºF (-10 °C to 50 °C)
at ≤ 80% relative humidity
Storage-4 ºF to 140 ºF (-20 °C to 60 °C)
SafetyEN61010-1 to 600 V CAT IV / 1000 V CAT III
Electromagnetic CompatibilityEMC Directive 2014/30/EU, EN61326-1:2013
Dimensions (W x H x D), without case3.8" x 8.2" x 2" (95 mm x 207 mm x 52 mm)
Weight1.4 lbs (630 g)
Warranty3 Years
Standard AccessoriesTest leads, K-type thermocouple adapter, protective case, optical-isolated USB cable, magnetic hanging kit, alkaline batteries

Data Sheet

BK Precision 393B Data Sheet

Manuals

BK Precision 393B User Manual

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