Spescom MeasureGraph is offering a whole new range of options and accessories for the Fluke 910/910R GPS Controlled Frequency Standards. These include the FL-15, a new GPS antenna fibre link, the new Option 76 Ethernet interface, plus four additional options which enable users to add up to five more reference sine wave and square wave outputs at recognised industry standard frequencies.
The 910 and 910R GPS-Controlled frequency standards deliver a precision frequency and time reference which, with its many connectivity options, can now be installed, monitored and managed from virtually any location. Both models receive their long-term frequency stability from the built-in Cesium-standards in the GPS-satellite array, yet can also provide a very high short-term stability from the built-in oven controlled crystal oscillator (OCXO) or rubidium standard (Rb).
Both the 910 and 910R are the only frequency standards with full autonomous traceability. With this they are extremely accurate and ideally suited for use as frequency standards in many applications, including telecommunications, calibration and automatic test systems, says the distributor.
GPS antenna fibre link
Until now, the location of every off-air frequency standard has been governed by the location of its antenna and the limiting length and thickness of the co-axial cable between the antenna and the instrument. Frequently, this has meant that the instrument has been inconveniently positioned within the lab, or even outside the controlled environment of the calibration laboratory.
The 910-15 GPS fibre link eliminates this problem and allows the user to position the instrument practically anywhere. The low loss (0,4 dB/km) lightweight fibre optic link means that the distance between antenna and instrument can be as much as 10 km. Further to this, the flexible and lightweight fibre optic cable has a very small diameter and can fit into virtually any cable pipeline. Also, it provides the 910 and 910R immunity to electrical interference, such as lightning strikes and EMP interference as well as electrical isolation between antenna and receiver module.
Central or remote management
The 910 and 910R can both be fitted with an optional Ethernet communication interface which enables on-line access. Using the GPSView software supplied, it is possible to monitor both instrument and GPS status, or even collect calibration data, via the Internet or any LAN. With Ethernet interface connectivity, distances to which data can be transmitted become unlimited, unlike standard GPIB or RS232 interfaces.
This means that the metrologist or lab technician no longer requires a 'floating' laptop PC to directly perform instrument management tasks, as this can now be achieved from any desktop PC, from any location inside or outside the calibration laboratory. It also allows data from multiple instruments to be simultaneously viewed in realtime.
Options are available to expand the outputs, maximising cost efficiency.
For more information contact Van Zyl Koegelenberg, Spescom MeasureGraph, 011 266 1662, [email protected]
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