Vega VEGATOR 142 Operating Instructions Manual

Vega VEGATOR 142 Operating Instructions Manual Manual pdf 23 page image

237 Maintenance and fault rectificationVEGATOR 142 •46839-EN-1906267 Maintenance and fault rectification7.1 MaintenanceIf the device is used properly, no special maintenance is required innormal operation.The cleaning helps that the type label and markings on the instrumentare visible.Take note of the following:• Use only cleaning agents which do not corrode the housings, typelabel and seals• Use only cleaning methods corresponding to the housing protec-tion rating7.2 Rectify faultsThe device offers maximum reliability. Nevertheless, faults can occurduring operation. These may be caused by the following, e.g.:• Measured value from sensor not correct• Voltage supply• Interference in the cablesThe first measure to be taken is to check the input and output signals.The procedure is described as follows. In many cases the causes canbe determined this way and faults can be easily rectified.Should these measures not be successful, please call in urgent casesthe VEGA service hotline under the phone no. +49 1805 858550.The hotline is manned 7 days a week round-the-clock. Since we offerthis service worldwide, the support is only available in the Englishlanguage. The service is free, only standard call charges are incurred.Depending on the reason for the fault and the measures taken, thesteps described in chapter "Set up" may have to be carried out again.Cause RectificationSensor not connectedcorrectly • In Ex systems, make sure that the Ex protection isnot influenced by the measuring instruments used• Measure the current and voltage on the connec-tion cable to the sensor• Faults in the sensor causing a current change tobelow 3.6 mA or over 21 mA lead to a fault signalin the controllers• The terminal voltage at the sensor must be withinthe specified range. You can find this voltagerange in the operating instructions of the con-nected sensorMaintenanceCleaningCauses of malfunctionFault rectification24 hour service hotlineReaction after fault recti-ficationRed fault LED lights up