Data Sheet
True RMS Bench Multimeters
2831E and 5491B
True RMS Bench Multimeters with
Dual Display
The B&K Precision models 2831E and 5491B
are versatile and dependable bench multimeters
suitable for applications in education, service and
repair, and manufacturing requiring basic and
reliable measurements. Additionally, these
instruments enhance your productivity with
built-in math functions and USB connectivity,
features not found in other bench meters in this
price category. Math operations Rel, Max/Min,
dBm, dB, %, and Hold provide educators with a
convenient tool to teach basic math concepts.
The 2831E and 5491B take typical multimeter
measurements such as volts, ohms, and amps
with great accuracy, stability, and basic VDC
accuracy of 0.02% on the 5491B and 0.03% on
the 2831E. The meters are also capable of
measuring frequency, period, continuity, and
performing diode tests. Readings can be taken at
a maximum rate of 25 readings/sec with
measurement rates selectable between slow,
medium, and fast.
Thes multimeters were designed for
cost-conscious users requiring a basic and
dependable meter with a broad range of features
offered at a value price.
Features & benefits
I
Up
to 50,000 count display resolution
VDC accuracy of up to 0.02%
display to indicate two measurements
I
Basic
I
Dual
simultaneously
I
AC
I
Up
+ DC True RMS
to 25 readings per second measurement
volt and amp measurement over wide
mode for Pass/Fail testing
math functions: Rel, Max/Min, dBm,
rate
I
AC
frequency range (ACV 100 kHz/ACI 20 kHz)
I
Limit
I
Built-in
Resolution
Model
2831E
5491B
Count
20,000
50,000
Digits
4 1/2
4 3/4
dB, %, Hold, Compare
I
CATI
I
USB
I
SCPI
(1000 V)/CATII (300 V) Protection
(Virtual Com) and RS232* interface
compatible
*5491B only
Technical data subject to change
© B&K Precision Corp. 2014
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True RMS Bench Multimeters
Models 2831E and 5491B
L
Versatile tools
Dual Display
L
Easy operation
Bright VFD display capable of
displaying two measurements
Soft rubber control
buttons
Sheathed safety
banana input jacks
These meters offer a dual display allowing
multiple measurements to be conveniently
displayed at once. The display values could be
two different measurements or one measurement
expressed in different units. For example, you can
simultaneously read an AC voltage and a
frequency value or a DC voltage value expressed
in volts and in dB.
Limit Operation
The limit operation lets you set and control the
values that determine a HI / IN / LO status of
subsequent measurements. The meter can be
configured to emit an audible alarm when
readings are outside of the configured limit.
Increase Productivity with PC
Connectivity
The 2831E and 5491B are programmable via
USB and RS232 (5491B only) interface using
industry standard SCPI commands. Users can
control and configure the instrument from a
remote PC and retrieve measurement results for
further analysis. The meters can also be remotely
controlled using application software (download-
able from the B&K website), which supports front
panel emulation and data logging of
measurement results.
RS232 Interface
(5491B)
Durable rubber bumpers for
added protection and ability
to stack multiple instruments
Front panel fuse
compartment for
easy fuse
replacement
Rear panel
USB communication
interface
Earth ground
connection
AC receptacle protected with
110/220V selectable line fuse
Application software screenshot
2
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True RMS Bench Multimeters
Models 2831E and 5491B
Specifications
DC Voltage
Resolution, Full Scale Reading and Accuracy ± (% of reading + % of range), 23 °C ± 5 °C
Rate
Range
200.00 mV
2.0000 V
Re solution
10 µV
100 µV
1 mV
10 mV
100 mV
10 µV
100 µV
1 mV
10 mV
100 mV
Fu ll Scale
Re ading
210.00
2.1000
21.000
210.00
1010.0 (2)
510.00
5.1000
51.000
510.00
1010.0 (2)
Accu racy
(1 year)
0.03%+0.08% (1)
0.03%+0.05% (1)
0.03%+0.06%
0.03%+0.06%
0.03%+0.06%
0.02%+0.016% (1)
0.02%+0.008% (1)
0.02%+0.008%
0.02%+0.008%
0.02%+0.008%
Typical I nput
I mpedance
>10 MΩ
>11.1 MΩ
>10.1 MΩ
10 MΩ
10 MΩ
>10 MΩ
>11.1 MΩ
>10.1 MΩ
10 MΩ
10 MΩ
2831E
Slow
20.000 V
200.00 V
1000.0 V
500.00 mV
5.0000 V
5491B
Slow
50.000 V
500.00 V
1000.0 V
(1) under REL status
(2) 1% over-range (1010 V) is readable at 1000 V range
AC Voltage
Resolution, Full Scale Reading and Accuracy ± (% of reading + % of range), 23 °C ± 5 °C
Rate
Range
200.00 mV
2.0000 V
Re solution
10 µV
100 µV
1 mV
10 mV
100 mV
10 µV
100 µV
1 mV
10 mV
100 mV
Full Scale
Readi ng
210.00
2.1000
21.000
210.00
757.5(3)
510.00
5.1000
51.000
510.00
757.5(3)
Accuracy(1 ye ar)(1) 23 °C ± 5 °C
20~50 Hz
1.0%+0.2%)
1.0%+0.2%)
1.0%+0.2%
----
----
1.0%+0.08%)
1.0%+0.08%)
1.0%+0.08%
----
----
50~20 kH z
0.5%+0.15%
0.4%+0.05%
0.4%+0.05%
0.8%+0.075%
0.8%+0.075%
0.5%+0.06%
0.35%+0.02%
0.35%+0.02%
0.5%+0.03%
0.5%+0.03%
20~50 kHz
1.8% + 0.25%
1.5% + 0.1%
1.5% + 0.1%
1.5% + 0.1%
1.5% + 0.1% (2)
1.5% + 0.1%
1% + 0.04%
1% + 0.04%
1% + 0.04%
1% + 0.04% (2)
50~100 kHz
3.0% + 0.75%
3.0% + 0.25%
3.0% + 0.25%
3.0% + 0.25%
3.0% + 0.25% (2)
3.0% + 0.3%
3.0% + 0.1%
3.0% + 0.1%
3.0% + 0.1%
3.0% + 0.1% (2)
2831E
S low
20.000 V
200.00 V
750.0 V
500.00 mV
5.0000 V
5491B
S low
50.000 V
500.00 V
750.0 V
Max. crest factor: 3.0 at full scale
(1) Specifications are for sine wave inputs >5% of range.
(2) Limit at 40 kHz or
≤
3×107 Volt-Hz for 750 V range
(3) 1% over-range (757.50V) is readable at 750V range
DC Current
Resolution, Full Scale Reading and Accuracy ± (% of reading + % of range), 23 °C ± 5 °C
Rate
Range
2.0000 mA
20.000 mA
Resolu tion
0.1 µA
1 µA
10 µA
100 µA
1 mA
0.1 µA
1 µA
10 µA
100 µA
1 mA
Fu ll Scale
Re ading
2.1000
21.000
210.00
2.1000
21.000 (3)
5.1000
51.000
510.00
5.1000
21.000 (3)
Accuracy
(1 ye ar)
0.08%+0.025% (2)
0.08%+0.02% (2)
0.08%+0.02%
0.3%+0.025%
0.3%+0.025%
0.05%+0.01% (2)
0.05%+0.008% (2)
0.05%+0.008%
0.25%+0.01%
0.25%+0.01%
B urden Voltage (1)
& Shu nt Re sistor
<0.3 V / 100
Ω
<0.04 V / 1
Ω
<0.3 V / 1
Ω
<0.05 V / 10 mΩ
<0.6 V / 10 mΩ
<0.6 V / 100
Ω
<0.06 V / 1
Ω
<0.6 V / 1
Ω
<0.1 V / 10 mΩ
<0.6 V / 10 mΩ
2831E
S low
200.00 mA
2.0000 A
20.000 A
5.0000 mA
50.000 mA
5491B
S low
500.00 mA
5.0000 A
20.000 A
(1) Typical voltage across the input terminals at full scale reading.
(2) Use REL function
(3) In 20 A range, >10~20 ADC is readable for 20 seconds maximum
3
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True RMS Bench Multimeters
Models 2831E and 5491B
Specifications (cont.)
AC Current (True RMS, AC Coupling)
Resolution, Full Scale Reading and Accuracy ± (% of reading + % of range), 23 °C ± 5 °C
Rate
R ange
2.0000 mA
20.000 mA
Resolu tion
0.1 µA
10 µA
100 µA
1 mA
10 mA
0.1 µA
10 µA
100 µA
1 mA
10 mA
Fu ll Scale
Re ading
2.1000
21.000
210.00
2.1000
21.000 (2)
5.1000
51.000
510.00
5.1000
21.000 (2)
Accu racy(1 ye ar)(1) 23 °C ± 5 °C
20~50 Hz
1.5%+0.5%
1.5%+0.5%
1.5%+0.5%
2.0%+0.5%
2.0%+0.5%
1.5%+0.16%
1.5%+0.16%
1.5%+0.16%
2.0%+0.16%
2.0%+0.16%
50~2 kH z
0.5%+0.3%
0.5%+0.3%
0.5%+0.3%
0.5%+0.3%
0.5%+0.3%
0.5%+0.08%
0.5%+0.08%
0.5%+0.08%
0.5%+0.1%
0.5%+0.1%
2~20 kHz
2%+0.5%
2%+0.38%
2%+0.38%
----
----
2%+0.16%
2%+0.12%
2%+0.12%
----
----
2831E
Slow
200.00 m A
2.0000 A
20.000 A
5.0000 mA
50.000 mA
5491B
Slow
500.00 m A
5.0000 A
20.000 A
Max. crest factor: 3.0 at full scale
(1) Specifications are for sine wave inputs >5% of range.
(2) In 20 A range,>10~20 A AC is readable for 20 seconds maximum
Resistance
Resolution, Full Scale Reading and Accuracy ± (% of reading + % of range), 23 °C ± 5 °C
Ful l Scale
Reading
210.00
2.1000
21.000
210.00
2.1000
21.000
510.00
5.1000
51.000
510.00
5.1000
51.000
A ccuracy
(1 year)
0.10%+0.05% (2)
0.10%+0.025% (2)
0.10%+0.025% (2)
0.10%+0.025%
0.15%+0.025%
0.3%+0.05%
0.10%+0.01% (2)
0.10%+0.008% (2)
0.10%+0.008% (2)
0.10%+0.008%
0.15%+0.008%
0.3%+0.01%
Rate
Range (1)
200.00
Ω
2.0000 kΩ
Resol ution
10 mΩ
100 mΩ
1
Ω
10
Ω
100
Ω
1 kΩ
10 mΩ
100 mΩ
1
Ω
10
Ω
100
Ω
1 kΩ
Tes t cu rrent
0.5 mA
0.45 mA
45 µA
4.5 µA
450 nA
45 nA
0.5 mA
0.45 mA
45 µA
4.5 µA
450 nA
45 nA
2831E
Slow
20.000 kΩ
200.00 kΩ
2.0000 MΩ
20.000 MΩ
500.00
Ω
5.0000 kΩ
5491B
Slow
50.000 kΩ
500.00 kΩ
5.0000 MΩ
50.000 MΩ
(1) In order to eliminate the noise interference, which might be induced to the test leads, it is recommended to use a shielded test cable
for measuring resistance above 100 kΩ.
(2) Using REL function
Continuity
Resolution, Full Scale Reading and Accuracy ± (% of reading + % of range), 23 °C ± 5 °C
Range
Resolu tion
100 mΩ
Fu ll Scale
Re ading
999.9
Tes t curre nt
0.5 mA
Accu racy (1 year)
23 ºC ± 5ºC
0.1%+0.1%
5491B 2831E
200
Ω
500
Ω
Open circuit voltage: <5.5 VDC
Test current: around 0.5 mA DC
100 mΩ
999.9
0.5 mA
0.1%+0.04%
4
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True RMS Bench Multimeters
Models 2831E and 5491B
Specifications (cont.)
Diode
Resolution, Full Scale Reading and Accuracy ± (% of reading + % of range), 23 °C ± 5 °C
R ange
2.0000 V
Res olution
100 µV
Full Scale
Reading
2.3000 V
Test cu rrent
0.5 mA (Approx.)
Rate
Med
Frequency
Resolution, Full Scale Reading and Accuracy ± (% of reading + % of range), 23 °C ± 5 °C
ACV
Range
200 mV
(500 mV*)
to 750V
* Model 5491B
Fre qu ency
Ran ge
10 Hz
10~100 Hz
100~100 kHz
100k~1 MHz
Best
Re soluti on
100 µHz
1 mHz
10 mHz
10 Hz
Fu ll Scale
Reading
9.9999
99.999
999.99
999.99
In pu t Sens itivity
(Sine Wave)
200 mV rms
300 mV rms
300 mV rms
500 mV rms
Accuracy
0.05%+0.02%
0.01%+0.02%
0.01%+0.008%
0.01%+0.008%
Period
Resolution, Full Scale Reading and Accuracy ± (% of reading + % of range), 23 °C ± 5 °C
ACV
Range
200 mV
(500 mV*)
to 750V
* Model 5491B
Fre qu ency
Ran ge
1~10 µs
10 µs~10 ms
10 ms~100 ms
100 ms
Best
Re soluti on
0.1 ns
1 ns
1 µs
10 µs
Fu ll Scale
Reading
9.9999
9.9999
99.999
199.99
In pu t Sens itivity
(Sine Wave)
500 mV rms
300 mV rms
300 mV rms
200 mV rms
Accuracy
0.01%+0.008%
0.01%+0.008%
0.01%+0.02%
0.05%+0.02%
General
A C In pu t
110/220 V ± 10%,
50/60 Hz ± 5%
Included Accessories
Power
Consu mption
≤
10VA
Operating
Environmen t
0 °C to 40 °C,
≤
90 %RH
Storage
En vironment
-40 °C to 70 °C
Warm-u p
at least 30 minutes
D ime nsions (W×H×D )
225 mm×100 mm×355 mm
8.85” x 3.93 “ x 13.97”
Net We ight
2.5 kg
5.51 lbs
One-Year Warranty (2831E), Three-Year Warranty (5491B)
Test leads, Power cord, Spare fuse, Operation Manual , Calibration certificate and test report
5
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