Datasheet

ManualsBrandsB&K Precision ManualsComponent Testing InstrumentsDC Resistance Meter, 20mOhm ... 20kOhm

Data Sheet

DC Resistance Meters

2840 Series

Technical data subject to change

www.bkprecision.com

The 2840 Series DC resistance meters feature

high accuracy and resolution measurements in the

milliohm range. Both meters are ideally suited for

measuring contact resistance of relays, switches,

and PCB traces, typically outside the resistance

range of multimeters. The vivid 4.3-inch TFT LCD

color touch screen and keypad provide intuitive

operation.

The 2841 model adds extended range, accuracy,

temperature measurement and functions. Measure

low resistivity materials with offset voltage

compensation to reduce the inﬂuence of thermal

EMF. Cable error detection displays a message

when one of the terminals is open, which helps

identify defective test leads or poor contact that

can cause unreliable measurements.

The 2841 includes two temperature compensation

functions: correction (TC) and conversion (∆t).

The TC function corrects for ambient temperature

changes that cause different resistance

measurements of the same component. The

temperature conversion (∆t) function can be used

to evaluate a coil’s resistance before and after

operation to calculate a temperature change.

These additional features make the 2841 ideal for

evaluating coils, motor windings, transformers,

actuators and conductive materials.

Both meters feature low power resistance testing

(LPR) modes and variable measurement speeds

that are suited for a wide range of applications.

The handler interface with high-speed

measurement capabilities enable the 2840 Series

to evaluate a large quantity of components and be

integrated into an automated test system.

Features & Beneﬁts

n 4.3-inch color touch screen

n 4-wire Kelvin test leads included

n Temperature measurement with correction*

n Low power resistance mode to protect DUT

n Manual or auto ranging

n Adjustable measurement speed for fast readout

or better accuracy

n Fast measurement speed up to 20 ms/reading

to increase manufacturing throughput

n Offset voltage compensation (OVC)*

n Cable compensation (0 ADJ)

n BIN comparator function to sort components

in up to 10* bin locations

n Bin-sorting with statistical measurement

n Store/recall 30 instrument settings

n Screen capture to USB drive

n Selectable power line ﬁlter

n Trigger delay

n Handler interface for easy integration with a

component handler

n Standard RS232, USB (USBTMC and virtual

COM), and LAN* interfaces

USB LAN* RS232

Model 2840 2841

Display Range 1 µΩ to 20 kΩ 0.1 µΩ to 100 MΩ

Basic Accuracy 0.1% 0.01%

Measurement Resolution 1 µΩ 0.1 µΩ

Displayed Digits 4 1/2 5 1/2

Functions R and LPR R, R-T, T, LPR, LPR-T

Resistance Measurement Ranges 7 + Auto 11 + Auto

Temperature Compensation - √

Number of Results Bins 3 10

* model 2841 only

Touch screen to zoom, select, and enter values

Summary of content (5 pages)

PAGE 1
Data Sheet DC Resistance Meters 2840 Series Touch screen to zoom, select, and enter values USB functions: correction (TC) and conversion (∆t). The TC function corrects for ambient temperature changes that cause different resistance measurements of the same component. The temperature conversion (∆t) function can be used to evaluate a coil’s resistance before and after operation to calculate a temperature change.
PAGE 2
DC Resistance Meters 2840 Series Front panel USB host port Menu function keys Touch screen Input terminals Kelvin test leads (Included with both models) Power On/Off Navigation keys Intuitive user interface 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.
PAGE 3
DC Resistance Meters 2840 Series Powerful features Bin sorting function Applications Component testing 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.
PAGE 4
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 Model 2841 LPR OFF LPR OFF Resistance Range Current 20 mΩ 1A 200 mΩ Resolution Accuracy (rdg% + digits)1 1 µΩ 0.
PAGE 5
DC Resistance Meters 2840 Series Specifications Model 2840 2841 10 ms 7 ms Measurement Function FAST Resistance Measurement Time (typical)1 MED 25 ms 22 ms SLOW1 115 ms 102 ms SLOW2 455 ms 402 ms - 100 ± 10 ms Temperature Measurement Time Measuring Terminals 4 terminals Averaging 1 to 255 Range Mode Auto and Manual Trigger Mode Internal, Manual, External, Bus mR + b Mode Apply a multiplier (m) and offset (b) to the measurement (R).