Product category:
Electrical and Electronic Subassemblies
News Release from: Jumo Instrument Company | Subject: Logoscreen 500
Edited by the Engineeringtalk Editorial
Team on 25 July 2001
Maths and logic functions for paperless
recorder
A range of new features has been added to give an even greater edge to the Logoscreen 500, which was the first paperless recorder that directly replaces conventional chart recorders
When it was introduced in mid 2000, the Logoscreen 500 from Jumo Instruments caused a stir by being the first paperless recorder that directly replaces conventional chart recorders Since then, over 1000 of them have been sold - far more than any other recorder on the market has sold in its first year
This article was originally published on Engineeringtalk on 8 Feb 2000 at 8.00am (UK)
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Paperless chart recorders get affordable
The Jumo Logoscreen 500 fits the same size slot as a standard chart recorder and, starting at £999, costs far less than most alternative screen recorders.
Entry level price for well-featured controller
The iTRON family of microprocessor controllers from Jumo Instruments is designed for people needing a controller with a rich array of functions at an entry-level price.
Now a range of new features has been added to give the Logoscreen 500 an even greater edge.
Most significant of these are a counter, an integration function and integral maths and logic modules, which will be particularly useful in applications such as flow measurement of fluids or gases.
These new functions are contained in software, so can be implemented in customers' existing Logoscreen 500 recorders and enabled through a code number.
The Logoscreen 500 comes as standard with a choice of three or six galvanically isolated universal measurement inputs that can take thermocouples, RTDs, milliamp and voltage input signals; extra options include four logic inputs, three relay outputs and a communications output.
These and all functions can be set up by the user to suit the application, either using a PC and set-up software via diskette or serial interface, or by using the eight keys on the front of the instrument.
Further reading
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The latest in Jumo Instruments' highly successful dTRON microprocessor controller series is now sealed to IP65, making it particularly suitable for laboratory, medical and sterilisation applications
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The counter function operates from the four (optional) logic inputs, and can count the data pulses to a maximum frequency of 30Hz.
The results, which can contain up to nine digits, are shown on the instrument's high resolution colour display.
The integration function will be particularly useful for flow measurement, where it is important to calculate total flows.
It allows the integration (in mathematical terms, the calculation of the area beneath a curve) and evaluation of analogue input signals (0/4=20mA, 0-1/10V).
A timer function has been introduced for applications such as the control of pump running times or the duration of alarms.
In addition to the four binary inputs, this enables the user to configure logic inputs, minimum and maximum alarm signals, storage-full alarms and a MODbus flag, which can be used to monitor the timed events and display the results.
The mathematics module provides the ability to combine analogue signal inputs, counters/ integrators and timers, logic inputs and alarms.
This significantly extends the range of applications for which the Logoscreen 500 can be used.
Screen masks can be provided for three or six analogue inputs, or with six counter/integrator channels, to enable the visualisation of counters, integrators and timers.
The logic module makes use of six virtual logic channels, whose use is independent of the measurement signal inputs.
Logical combinations ( AND, NOT, OR, XOR) of binary inputs, logic inputs and alarms can be used to initiate functions such as text displays, start/stop, timers and start recording.
These new functions all take full advantage of the five inch, wide angle STN display provided as standard with the Logoscreen 500.
This is clear and easy to read, even from a distance, with the values shown in high contrast colour.
It is configured to look exactly like a paper chart recorder - even down to the perforations along the edge of the "paper".
In addition to the new functions, the internal software can search and analyse measured values by date, time or events, and data can be visualised in different ways - such as vertical diagrams, scales, bar graphs, channel labels and event traces.
The Logoscreen fits a 144 x 144mm aperture.
It operates on a low voltage 20-53v AC/DC or high voltage 110-240V AC/DC supply and data acquisition is typically on a 250 ms cycle, with a minimum memory cycle of 1s and instantaneous display of the recorded value.
An RS232/422/485 interface is supplied as an option, allowing the Logoscreen 500 to communicate with a PC using Modbus, Jbus or Profibus communications.
This allows the recorder to act as an analogue input module to a larger system.
It is thus ideal for use in networked data acquisition and batch processing applications: few other commercially available, compact data recorders have this degree of power or flexibility.
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