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BK Precision 394B 50000 Count Process Multimeter

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SKU

394B

Manufacturer:

B&K Precision

Key Features:

Source/Measure/Simulate 0-20 mA and 4-20 mA DC current
Simultaneously monitor mA and % of scale
Adjustable manual and automatic output current ramp and step modes
Built-in 24 V loop power supply for testing process transmitters eliminates the need for an
external supply
HART® mode inserts 250 Ω resistor in series with loop power output when evaluating devices using the HART communication protocol
Measurement functions: DCV, ACV, AC+DC, DCI, ACI, resistance, frequency, continuity, diode test
True RMS AC and AC+DC measurements
50,000-count, dual display
dB, dBm, limits, peak-hold, REL (Δ), MIN, MAX, average math functions
HFR (High Frequency Rejection) mode applies a low pass filter for AC measurements (800 Hz cut-off)
Frequency measurement to 100 kHz
Dirt and water-resistant housing with rubberized protective case
Isolated USB interface with operating software for remote data logging
CAT III 1000 V / CAT IV 600 V protection

Product Options:

BK Precision 394B Calibration Options

None

Standard Calibration Certificate + $65.00

ISO 17025 Accredited Calibration Certificate + $75.00

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$790.00

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Product Detail

The BK Precision 394B is a process multimeter with an 50,000 display count. The 394B current output ranges is 0-20 mA or 4-20 mA and the loop power supply is >24 V.

Short Description

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 AC accuracy specification for Crest Factor 1.4 to 2.0
     - Add 2.5% to AC accuracy specification for Crest Factor 2.0 to 2.5
     - Add 4.0% to AC accuracy specification for Crest Factor 2.5 to 3.0
• For best accuracy use REL (delta) function to compensate the offsets
• AC + DC accuracy: AC accuracy + DC accuracy + 1.0%
• HFR accuracy: AC accuracy + 1.0% for 40 Hz to 400 Hz.
• Overload protection: AC/DC 1000 V

Voltage

Function	Range	Accuracy
AC ⁽¹⁾	50.000 mV 500.00 mV	Sine wave: (0.7 + 20) for 40 Hz to 70 Hz (1.5 + 40) for 71 Hz to 10 kHz
AC ⁽¹⁾	5.0000 V 50.000 V 500.00 V 1000.0 V⁽²⁾	Sine wave: (0.5 + 20) for 40 Hz to 70 Hz (1.5 + 40) for 71 Hz to 10 kHz (3.0 + 80) for 1001 Hz to 10 kHz
DC	50.000 mV	0.05 + 30
DC	500.00 mV 5.0000 V 50.000 V 500.00 V 1000.0 V	0.05 + 5

(1) Below 5% of AC range, add 20 digits to accuracy.
(2) The bandwidth of range is 40 Hz to 1 kHz
Notes:
- Input impedance: 10 MΩ, < 100 pF
- Min. resolution: 1 μV in 50 mV range

Current

Function	Range	Accuracy
AC ⁽³⁾	50.000 mA 1.000 A	Sine wave: (1.0 + 20) for 40 Hz to 70 Hz (2.0 + 40) for 71 Hz to 10 kHz
DC	50.000 mA 1.000 A	0.05 + 5

(3) Below 5% of AC range, add 20 digits to accuracy.
Notes:
- Max. continuous measuring time: 10 minutes at mA input, 1 minute at A input
- Min. rest time: 20 minutes after continuous measuring
- Input impedance: 13 Ω at mA input and 0.1 Ω at A input
- Min. resolution: 1 μA in 50 mA range

Resistance

Range	Resolution	Test Current	Accuracy
500.00 Ω	0.01 Ω	1 mA	0.2 + 30
5.0000 kΩ	0.1 Ω	100 μA	0.2 + 10
50.000 kΩ	1 Ω	10 μA	0.2 + 10
500.00 kΩ	10 Ω	1 μA	0.5 +10
5.0000 MΩ	100 Ω	100 nA	1.0 + 10
50.00 MΩ	10 kΩ	10 nA	2.0 + 10

Notes:
- Max. open circuit voltage: 3.5 V

Continuity

Range	Resolution	Test Current	Accuracy
500.00 Ω	0.01 Ω	1 mA	0.1 + 30

Notes:
- Max. open circuit voltage: 3.5 V
- Continuity threshold: < 30 Ω

Diode Test

Range	Resolution	Test Current	Accuracy
2.000 V	1 mV	± 1 mA	1.0 + 10

Notes:
- Max. open circuit voltage: ± 3.5 V

Frequency

Range	Resolution	Accuracy
500.00 Hz	0.01 Hz	± 3 digits
5.0000 kHz	0.1 Hz
50.000 kHz	1 Hz
100.00 kHz	10 Hz

Notes:
- Min. frequency: 5 Hz

Process Multimeter Functions / Current Output

Range	Accuracy	Resolution	Output Adjustment Modes
			Ramp	Step
0 to 20 mA or 4 mA to 20 mA (overrange up to 24 mA)	± (0.05 + 5)	1 μA	Linear (slow), 0% to 100% and back to 0% in 40 s Linear (fast), 0% to 100% and back to 0% in 20 s	25% steps (coarse), 0% to 100%, 15 s for each step 25% steps (fine), 0% to 100%, 5 s for each step

Process Multimeter Functions / Loop Power

Range	Accuracy	Drive Capability
		Normal	250 Ω HART
50 mA	± (0.05 + 5)	30 V / 1.25 kΩ	24 V / 1 kΩ

General

Display		5 digit / 50,000 count
Measurement Speed		10 samples per second
Connectivity		IR-USB
Power		4 x 1.5 V AA size batteries
Battery Life (typical)		100 hours
Auto Power Off		Adjustable up to 20 minutes or never
Low Battery Indicator		√
Overrange		OL is displayed
Temperature	Operating	14 ºF to 122 ºF (-10 °C to 50 °C) at ≤ 80% relative humidity
	Storage	-4 ºF to 140 ºF (-20 °C to 60 °C)
Safety		Low Voltage Directive (LVD) 2014/35/EU, EN61010-1, EN61010-2-30, 600 V CAT IV / 1000 V CAT III
Electromagnetic Compatibility		EMC Directive 2014/30/EU, EN61326-1:2013
Dimensions (W x H x D), without holster		3.8" x 8.2" x 2" (95 mm x 207 mm x 52 mm)
Weight		1.4 lbs (630 g)
Warranty		3 Years
Standard Accessories		Test leads, protective case, optical-isolated USB cable, magnetic hanging kit, alkaline batteries