Scopemeters feature industrial Bus Health Test
A
Fluke (UK) product story
Edited by the Engineeringtalk editorial team
Oct 17, 2008
Fluke has added two models to its range of Colour Scopemeters.
As well as an industrial Bus Health Test capability, the Fluke 225C (200MHz, 2.5GS/s) and Fluke 215C (100MHz, 1GS/s) include all the features of Fluke's 199C and 199C Colour Scopemeters.
The handheld Fluke 225C and 215C are aimed at maintenance specialists who deal with industrial buses, networks and general electronics.
They verify electrical signal quality on industrial buses including Profibus, Foundation, Modbus, CAN-bus, RS-485 and more.
The instruments feature signal validation of all the signal parameters, and floating and fully isolated inputs for true differential signal measurements.
They allow users to verify the electrical integrity of bus and network, performing physical layer tests.
The 225C and 215C offer a range of test capabilities including FFT analysis for identifying individual frequency components contained in a signal.
The Trendplot paperless recording function helps uncover long-term trends and shows changes in any of the measurable parameters.
The Scoperecord function allows long records of waveform recordings to be made, over a period up to 48 hours.
A 'replay' function enables the user to take a closer look at any anomaly seen flashing by on the screen, by re-playing the last sequence of 100 screen images.
The Bus Health Test analyses the electrical signals on the industrial bus or network and gives a clear 'good', 'weak' or 'bad' validation mark for each relevant parameter, next to the actual measured value.
Measured values are compared to standard values based on the bus type selected, or personal reference values if users need different tolerances.
The Fluke 225C and 215C can validate the signal quality as soon as electrical signals are passed along the network, without looking at data content.
They help in finding errors such as improper cable connections, bad contacts, incorrect grounding and missing or superfluous terminators.
The independently isolated input channels and the floating inputs mean that the Scopemeters can take floating differential measurements from balanced two-wire systems such as RS-485 and CAN.
One input channel can measure the voltage between the two signal wires, and the other can measure the common mode voltage over ground at the same time, independently.
The large colour screens of the 225C and 215C show the individual parameters with validation, the actual measured value, the minimum and maximum values recorded over time and the reference values used for the validation.
The choice of parameters differs with the bus type and may include bias voltage, signal high and low levels, rise and fall times, in-band and out-band noise levels, jitter, pulse width, baud-rate and so on.
Activity indicators tell users that the data flow is ongoing, and stop flashing the moment communications come to a halt.
In the eye-pattern mode, a waveform display is built over successive signal passes to give a visual indication of overall signal quality, noise levels and signal jitter.
All Fluke Scopemeters allow users to perform the basic electrical tests like copper resistance and isolation tests on an electrical system or a cable.
The 225C and 215C give extensive network signal analysis capabilities.
The isolated channel structure gives good immunity to common mode noise and disturbances, and can measure common mode voltages separately.
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Contact Fluke (UK)
Tel +44 207 942 0700
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