Instrument Documents in Modification Project

If you want to add a new pressure transmitter in existing plant, what existing instrument documents are affected during design phase?

  • Instrument layout document shall be revised to include new pressure transmitter.

  • Instrument Cable Layout shall be revised to show new cable routing for new pressure transmitter.

  • Junction box termination diagram / connection list shall be revised if the new transmitter is connected to the existing junction box. The terminal number which is previously intended for SPARE shall now indicate the new connection for transmitter cable. This is to show that the terminal strips are now occupied.

  • Marshalling cabinet termination diagram shall be revised to show connection of the new cable in the available terminal strips and they are now occupied.

  • New loop diagram is required for construction and maintenance purpose.

  • New instrument hook-up drawing is required for correct installation.

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