The touch screen and keys both provide a convenient interface for setting parameters quickly and precisely. Both models also support one touch zoom to enhance
the readability of displayed measurements.
Rear panel
Handler interface
RS232C
interface
USB interface
Model 2840
Chassis ground
USB interface
AC line input with
fuse holder
Temperature probe
(Included with model 2841 only)
Temperature
probe input
Model 2841
Handler interface
2
LAN interface
www.bkprecision.com
DC Resistance Meters
2840 Series
Powerful features
Bin sorting function
Component testing
Applications
Quickly sort components using the 10 bins of the 2841 or 3 bins of the 2840.
The results can be displayed on the screen or output via the handler interface.
High and low limits for each bin can be set up in absolute or tolerance mode.
Temperature correction
Measure the resistance of motor and transformer windings, relay and
switch contacts, and other conductive materials and components. 4-wire
Kelvin test leads included with both models.
Circuit board testing
The 2841 can compensate for temperature changes with a component’s known
temperature coefficient of resistivity. This allows for increased comparison
accuracy between components that are measured at different temperatures.
The resistance meters’ high accuracy make them suitable for measuring
trace resistances and finding shorts on PCBs.
Remote PC control
LPR (Lower Power Resistance) measurement
In standard resistance measurement mode (LPR OFF), the large drive current
(1 A max.) may damage sensitive components or circuits. LPR mode protects
the DUT by limiting the maximum power being applied.
Offset voltage compensation (OVC)
OVC switches the polarity and averages the forward and reverse polarity
readings. This enables accurate measurements by minimizing the adverse
effects of thermal EMFs or small biases in a circuit (e.g., from a capacitor’s
dielectric absorption when measuring a PCB trace).
Integrate your DC resistance meter into an automated test system and control
it from a PC using commands via the RS232 or USB interface. The 2841 is
LAN enabled with a web browser interface that allows users to conveniently
configure, control, or monitor basic settings.
3
www.bkprecision.com
DC Resistance Meters
2840 Series
Specifications
Specifications are valid after temperature stabilization period of 15 minutes over an
ambient temperature range of 23 °C ± 5 °C.
Resistance Measurements
Model 2840
LPR OFF
Resistance
Range
Current
Resolution
Accuracy
(rdg% + digits)
1
Maximum Open
Terminal Voltage
LPR OFF
Resistance
range
3
Current
Resolution
Accuracy
(rdg% + FS%)
Maximum Open
Terminal Voltage
Model 2841
20 mΩ
200 mΩ
2
Ω
20
Ω
200
Ω
2 kΩ
20 kΩ
LPR ON
1A
100 mA
10 mA
1 mA
100 µA
1 µΩ
10 µΩ
100 µΩ
1 mΩ
10 mΩ
100 mΩ
1
Ω
100 µΩ
1 mΩ
10 mΩ
100 mΩ
0.1 + 3
0.7 V
20 mΩ
200 mΩ
2
200 mΩ
2
1A
(selectable)
100 mA
100 mA
10 mA
1 mA
100 µA
10 µA
1 µA
100 nA
10 mA
1 mA
100 µA
10 µA
0.1 µΩ
1 µΩ
1 µΩ
10 µΩ
100 µΩ
1 mΩ
10 mΩ
100 mΩ
1
Ω
10
Ω
100
Ω
1 kΩ
100 µΩ
1 mΩ
10 mΩ
100 mΩ
0.25+0.001
0.25+0.001
0.35+0.001
0.035+0.001
0.025+0.001
0.01+0.001
0.01+0.001
0.01+0.005
0.01+0.003
0.02+0.001
0.1+0.006
0.8+0.060
5V
0.1 + 2
3V
2
Ω
20
Ω
200
Ω
2 kΩ
20 kΩ
2.6 V
2
Ω
20
Ω
200
Ω
2 kΩ
10 mA
1 mA
100 µA
10 µA
0.2 + 5
40 mV
100 kΩ
1 MΩ
10 MΩ
100 MΩ
LPR ON
13 V
Accuracy = (measurement value x rdg) + (least significant digit)
1
- Test speed set to Slow2
2
Ω
20
Ω
200
Ω
2 kΩ
2
3
0.05+0.001
60 mV
Accuracy = (measurement value x rdg%) + (resistance range x FS%)
- Current for the 200 mΩ range can be selected in the measurement setup menu.
- Measurement display is 5 1/2 digits for ranges 20 mΩ to 20 kΩ, 5 digits for ranges 100 kΩ
to 100 MΩ
Temperature Measurements (Model 2841 only)
Pt500
Temperature range
Resolution
Accuracy in six months
Accuracy in one year
-10.0 °C to 39.9 °C
40.0 °C to 99.9 °C
Accuracy = 0.3% x measured value ± 0.5 ºC
0.1 °C
0.1 °C
±0.30%rdg ± 0.5 °C
±0.30%rdg ± 1.0 °C
±0.45%rdg ± 0.8 °C
±0.45%rdg ± 1.5 °C
Analog Input
Input voltage range
Temperature range display
Resolution
Accuracy
0 to 2 V
-99.9 °C to 999.9 °C
1 mV
±1% T
R
± 3 mV
Accuracy = 1% x (T
R
– T
0V
) + 0.3% x (T
1V
- T
0V
)
T
1V
: The temperature measured under input voltage of 1 V.
T
0V
: The temperature measured under input voltage of 0 V.
T
R
: The current measured temperature.
4
www.bkprecision.com
DC Resistance Meters
2840 Series
Specifications
Model
Measurement Function
2840
FAST
10 ms
25 ms
115 ms
455 ms
-
4 terminals
1 to 255
Auto and Manual
Internal, Manual, External, Bus
2841
7 ms
22 ms
102 ms
402 ms
100 ± 10 ms
Resistance
Measurement
Time (typical)
1
MED
SLOW1
SLOW2
Temperature Measurement Time
Measuring Terminals
Averaging
Range Mode
Trigger Mode
mR + b Mode
LPR Mode
Statistical Measurement Function
Comparator (bin sorting) Function
Apply a multiplier (m) and offset (b) to the measurement (R). (2841 model only)
Ranges 20
Ω,
200
Ω,
2 kΩ, maximum open terminal voltage: 60 mV
AVG, MAX, MIN, OSD (Overall standard deviation), SSD (Sample standard deviation), Process capacity index (Cp, Cpk)
IN, HI, LO
OFF, IN, HI, LO
Absolute value high/low limit, Percentage high/low limit + nominal value
3 bins, absolute value/percentage
10 bins, absolute value/percentage
Signal output
Comparator
Bin Sorting
General
Beep mode
Limit setup mode
Voltage
AC input
Frequency
Power Consumption
Display
Remote Interface
Handler Interface
Storage Memory
Operating Temperature
Storage Temperature
Dimensions (W x H x D)
Weight
110 VAC
60 Hz
220 VAC
50 Hz
< 30 VA
110 to 240 VAC ± 10 %
50 to 60 Hz
4.3”, 480 x 272 TFT Color (24-bit) LCD touch screen
USB (USBTMC or virtual COM), RS232
9-pin connector
Save/recall 30 instrument settings
0 °C to 40 °C,
≤
80% RH
5 °C to 40 °C,
≤
85% RH
8.46” x 3.5” x 14.17” (215 mm × 89 mm × 360 mm)
8.6 lbs (3.9 kg)
6.45 lbs (2.92 kg)
USB (USBTMC or virtual COM), RS232, LAN
50-pin connector
Three-Year Warranty
Included Accessories
1
AC power cord, user manual (downloadable), Kelvin test leads (TLDK1), temperature probe TPTC2 (model 2841 only), test
report and certificate of calibration
- When DISPLAY is OFF; when DISPLAY is ON, 20 ms should be added.
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