▼ CBT2 CAN-Bus Tester 2   ▼ Technical Data

通用測量儀器用以調試、分析、監測、故障排除和維修/保養 CAN-Bus


The CAN-Bus Tester 2 is a widely used measuring device for control of bus parameters. The success story starts already in the year 2002 with the first model. The hardware was completely redesigned in version 2. The corresponding software is still developed and has been enhanced with extensive updates.

Check the setup of the bus before you switch on with the bus wiring test, measure under running conditions down on the physical layer and analyses data of the nodes with the protocol monitor. The longtime monitor shows scattered errors and creeping signal loss.

The trigger output makes it possible to show data from only one node of the bus.

The great box contents within the service case with big adapter set make it possible to use the device out of the box in many environments. You can save your measurements and print a status protocol directly from the software.


Bus Systems

The measuring device works in the networks CAN, CANopen, DeviceNet and SAE J1939.

The CBT2 can also be used for measurements in other bus systems based on the CAN standard. These include Isobus, NMEA 2000 and SafetyBus P, but also Energy bus, CANaerospace and ARINC825. Niche bus systems are MilCAN and CANopen Lift.


License Model

In the basic configuration, the CAN-Bus Tester 2 is enabled for bus system CAN. You can do all physical measurements within this system.

Additional licenses are offered to the systems CANopen, DeviceNet and SAE J1939. With them, it is much easier to assign the messages to the real nodes.

The optional protocol monitor is for logical bus analysis in the bus systems CAN (transmit/receive), CANopen (receive) and SAE J1939 (receive).

The user software is free to download and use, only for measurements with the CAN-Bus Tester 2 it has to be unlocked.



Power Supply

The device works with 9 – 36 V. Only for the Bus Wiring test min. 24 V is needed.

USB Port

Connect your Windows PC or laptop here.

CAN and CAN probe port

Two 9‑pin D‑Sub ports are for connection to the bus and for probes

Trigger Output

For further measurements with a digital storage oscilloscope, the CAN-Bus Tester 2 can be used as the trigger source.


Two Devices in one

The CAN-Bus Tester 2 is basically a 2‑in‑1 device. One part is responsible for the extensive measurements on the physical level. The 64-fold sampling of each individual bit makes detailed evaluation possible.
The other part is a CAN-to-USB interface for comprehensive protocol analysis. Both parts of the device can work independently of each other or simultaneously and together.

Among many other things, it is possible to stop the protocol analysis automatically if the physical measuring device has detected a problem. In this way, the data traffic can be evaluated immediately before an error occurs. You don’t have to search through long lists of telegrams, the end of the list is the relevant point.


Bus Wiring Test

With the wiring test, it is possible to determine line short-circuits, line breaks, the bus termination, the loop resistance of the CAN line and the CAN power supply line and the overall line length.

To ensure correct bus cabling, it is recommended to perform the wiring test at the beginning of any plant measurements.

Wiring test, Successful

Wiring test, Error


Node Measurement

Connect the CAN-Bus Tester 2 to your bus line. You should see a green led on your display, showing that there is data traffic.

First, start the baud rate scan, then scan for nodes. All messages on the bus are now received and analyzed, the nodes with their ID are listed. Name the nodes if you want for a better overview.

With the measurement “all stations view” you get an overview of the quality levels of the signals. The bar diagram makes it easy to compare. At continuous mode, you will additionally see the min/max values. You can easily compare to a saved measurement.

The measurement “one station’s view” shows the single values of one node and shows a physical and logical decoded oscillogram. Quality level, edge steepness and disturbance-free voltage range are the three showed measurands. By starting a continuous measurement you will also see the min/max of quality level and the variation of the disturbance-free voltage range.

View All Stations

View One Station


Online Monitor

This measurement runs continuously and compares with given thresholds. If it overruns the threshold the error will be registered. In the single measurement mode, it stops and the faulty message is showed in the oscilloscope view. In continuous mode, the error is marked in a timing diagram. So you show when your threshold was overruled or if an error frame has occurred.

The observed values are

Additionally, to this logical and physical measurements, the CAN-Bus Tester 2 is continuously determining bus traffic load, bus status and the optional CAN supply voltage.

The software can be adjusted in a way, that a simultaneously running Receive in the protocol monitor is stopped in case of an error. So it is easier to analyze that data traffic that was on the bus before the error occurred.

View Online Trigger


Protocol Monitor

Many features of the CANvision Protocol Monitor are built in the CAN-Bus Tester 2 user software. It is easily unlocked when you buy a license.

Inform yourself about the range of features of CANvison here.

The main difference is the network capability, this can only be used with the full version of CANvision.

Protocol monitor, Transmit Window Protocol monitor, Receive window Protocol monitor, CANopen Receive Protocol monitor, SAE J1939 Receive Protocol monitor, Trigger Protocol monitor, Filter


Technical Data

  • CBT2 CAN Bus Tester 2



    • General parameters and overview of functions

    Bus systems

    CAN (ISO11898‑2), CANopen (CiA301), DeviceNet (EN 50325 – 2), SAE J1939

    Bit sampling

    64-fold, 10,240 sampling points

    Bit timing

    Adjustable BTL cycles (tq), sample point and resynchronization jump width (SJW)

    Supported baud rates

    Depending on bus system: 10; 20; 50; 100; 125; 250; 500; 800; 1000 kbit/s
    Additionally user-defined: 5; 33.3; 62.5; 75; 83.3; 200 kbit/s
    Automatic detection via baud rate scan

    List of stations

    Automatic detection via Station scan
    Designation, CAN ID, ID type, Node ID, MAC ID, Source address,
    can also be entered manually

    List of Measurements

    Possibility to measure at different measuring points and at different times
    Sorting by measurement type, measuring point and measurement time

    Quality level

    Value representing the signal quality (0 …100%)
    The minimum value and maximum values
    saved timestamp

    Disturbance-free voltage range
    and edges

    Disturbance-free voltage range (typ. ‑0.75 … 3 V, resolution 50 mV)
    Edge steepness (falling and rising, specified in 1/64th of the bit width)
    The minimum value and maximum values saved

    Oscilloscope display

    Trigger on message frames with the specified ID, trigger position can be set
    Frame analysis and full frame recording
    Decoding according to the protocol (CAN, CANopen, DeviceNet, SAE J1939)
    Zoom (six stages)

    Online Trigger

    Real-time monitoring of the bus for logical and physical errors
    Resolution can be set (10 ms … 1 min)
    Oscilloscope display and e‑mail notification on triggers

    Automatic evaluation

    Limit value settings and measured-value evaluation according to:

    • critical quality level
    • critical disturbance-free voltage range
    • critical edge (rising and falling)

    Bus status

    Bus traffic detection (display: dominant, recessive, not defined, bus traffic)

    Bus traffic load

    Permanent display of the bus traffic load (0 … 100%),
    Minimum and maximum values saved

    Error frames

    Constant display of detected frame errors
    Distinction between active and passive error frames (0 … >50,000)

    Protocol monitor

    CAN: Reception of CAN message frames incl. filtering, Transmission of CAN
    message frames and sequences (message lists)
    CANopen: Interpretation of all CAN messages according to the CANopen spec as SDOs, PDOs, NMT‑, Heartbeat‑, Emergency‑, Sync- and Timestamp
    (CiA301, CiA302, CiA305, CiA401, CiA402, CiA404, CiA406, CiA408, CiA410, upgradeable)

    Test record

    Comprehensive, configurable measuring and test record on DIN A4:

    • Letterhead with tester and customer contact data
    • The tabular representation of the measured values
    • Graphic representation of the measured values

    Export function

    Measuring data as a configurable CSV file
    Graphical measured-data representation as a configurable bitmap (.bmp,.jpg,.png)

    Firmware and FPGA configuration

    can be updated via USB


    • Electrical parameters

    Power supply

    Via the supplied wide-range power supply (9 … 36 V DC)

    Current consumption

    0.55 … 0.15 A

    Measuring of the differential voltage

    typ. ‑0.75 V … 3.00 V

    Measuring of the loop resistances

    typ. 0 Ω … 800 Ω

    Measuring of the cable length

    typ. 0 m … 500 m

    • 0…100 m: Resolution: 0.5 m, Accuracy: 3 % ± 1.5 m

    • 100…500 m: Resolution: 1.0 m, Accuracy: 10 % ± 10 m

    for a signal runtime of: 4.5 ns/m for CAN/CANopen/SAE J1939, 4.3 ns/m for DeviceNet

    Measuring of the CAN supply voltage

    0 … 36 V

    Potential difference between the connections CAN bus, USB and oscilloscope

    < 50 V DC (or < 71 V AC)

    Trigger output for the oscilloscope

    BNC socket, electrically isolated, H pulse, approx. 2 bits wide, level approx. 5 V

    • Mechanical parameters

    Supply voltage connection

    Extra-low voltage socket

    CAN connection

    2 x 9‑pin D‑Sub connector

    PC connection

    Self-powered device to USB Specification 1.1, electrically isolated

    Trigger output for oscilloscope

    BNC socket, electrically isolated


    Aluminum sheet housing

    Temperature range

    Operation: 5 °C … 40 °C
    Storage: ‑20 °C … 60 °C


    Operation: 20 % … 80 % (non-condensing)
    Storage: 20 % … 80 % (non-condensing)

    Degree of protection of the housing

    IP20 to EN 60529

    Dimensions (Device /Case)

    170 mm x 134 mm x 40 mm /504 mm x 354 mm x 119 mm

    Weight (Device /Case)

    Approx. 600 g /Approx. 5000 g


    The CBT2 is a Class A device. Such devices can cause interference in residential areas. In this case, the plant operator can be required to take appropriate measures and to bear the costs of such measures.

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