5.4 Electrical and Instrument Loop Test.
This procedure provides direction for quality control activities of instrument loop test
5.4.1 The loop test can only be performed since all component of instrument loop have be calibrated and tested in accordance with the procedure for instrument calibration and/or testing.
5.4.2 Any unusual or suspect action of a loop component must be investigated and corrected.
5.4.3 Check proper mechanical or electrical operation of instrument in loop, and identification of loop instruments.
5.4.4 Check that each instrument in loop performs the proper function, i.e.That controller tracks the transmitter signal, that correct recorder pen moves in the correct direction and in accordance with transmitted signal that correct alarm point and/or interlocks switch responds as specified, and that the proper control valve opens or closes as required.
5.4.5 Check power supply and correct identification of loop power switches, circuit breakers, or fused isolating switches.
5.4.6 Test annunciation and individual alarms by simulating alarm conditions, or where this is not possible by mechanically operating the field contact.
5.4.7 Check annunciation alarm sequence : Test, Acknowledge and Reset function.
5.4.8 Test all interlocking and shutdown system including package equipment.
5.4.9 Test all pushbuttons. Check to see that correct main contractor or relay energizes or de-energizes properly; that correct valve opens, closes or stops; that trip circuit are tripped or reset; and status light function.
5.5 Electrical and Instrument Calibration and Testing.
This procedure describes the requirement for quality control activities of instrument calibration and/or testing.
5..1 The objective of this procedure is to obtain a permanent record and to verify that all instrument measure, indicate and record accurately within each manufacture’s specification and that all instrument conform to project specifications.