Pulling cable through underground ducts was once done manually, but these days special motorised winches are used. Those who lay the cable are required to provide records showing distance pulled and tension in the cable. This is especially important with fibre optic cable which is not very robust and which can cost up to £36,000 per reel. MultiLog is a complete stand-alone recorder, operated via a keypad and liquid crystal display and requires only a standard 12-Volt engine battery for operation. It is fitted with a tally-roll printer and, can be connected to a PC for uploading recorded data. MultiLog uses a rotary encoder for measuring rope pull distances and a pressure transducer for monitoring the drives hydraulic fluid pressure or a load cell mounted on the jib. An in-built equation accurately converts the pressure into units of tension in the winch cable. The system is factory-configured for use with different types of winch. A user-entered overload factor prevents the winch from applying too much tension to the cable and a 12-Volt output operates a cut-off solenoid. The recorder can store configuration settings in non-volatile memory. The system can therefore be configured for routine operation and will retain settings even when the power is turned off. It contains a millennium-compliant battery-backed real-time clock/calendar. The date and time are used to identify recordings. The recorder is available with a data storage capacity equivalent to 10,000 metres of cable, recording every 5 metres. The controller is operated manually using the in-built keypad and liquid crystal display. The computer connection is used only for configuring the recorder or uploading data. |