Instrument loop check-sheet

The loop test results should be recorded (a sample instrument loop check sheet has been provided for reference purposes in Appendix 23D) and included with the site test records. Checks for mechanical/electrical completeness are recorded using the upper section of the sheet and the dytramic loop test results are recorded on the lower section. The test results sheets will provide the documentary evidence essential for Installation Qualification (IQ). Representatives from the installation contractor and/or the customer will witness the final loop tests and countersign the test sheets. Any tests not witnessed must be accompanied by written confirmation from the customer that witnessing has been waived. 

Inspect the loop and set air/electrical supplies where appropriate. Check in particular that control valve air supply pressures are set in accordance with the instrument specification/data sheet. 

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