568 Diagnostics and servicingVEGABAR 82 • 4 … 20 mA45027-EN-1705223. Loosen the plug connector4. Mount the new process assembly on the measuring point5. Plug the connector back in6. Mount the cable assembly on the process assembly and turn it tothe desired position7. Tighten the fixing screw with the hexagon key wrenchThe exchange is finished.If there is no replacement part available on site, one can be orderedfrom the agency serving you.The necessary serial number can be found on the type label of theinstrument or on the delivery note.8.6 Exchanging the electronics moduleIn case of a defect, the user can replace the electronics module withanother one of identical type.In Ex applications, only instruments and electronics modules with ap-propriate Ex approval may be used.You can find detailed information you need to carry out an electronicsexchange in the handbook of the electronics module.8.7 Software updateThe following components are required to update the instrumentsoftware:• Instrument• Voltage supply• Interface adapter VEGACONNECT• PC with PACTware• Current instrument software as fileYou can find the current instrument software as well as detailedinformation on the procedure in the download area of our homepage:www.vega.com.Caution:Instruments with approvals can be bound to certain software versions.Therefore make sure that the approval is still effective after a softwareupdate is carried out.You can find detailed information in the download area atwww.vega.com.8.8 How to proceed if a repair is necessaryYou can find an instrument return form as well as detailed informa-tion about the procedure in the download area of our homepage:www.vega.com.By doing this you help us carry out the repair quickly and without hav-ing to call back for needed information.If a repair is necessary, please proceed as follows: