Calibrating and Function-Checking Level Measurement Systems

The selected Displacement type level transmitter must be of a similar specification and complexity of construction to that of the example show. The transmitter must allow the candidate to make a 20% range change for the purpose of the test.

The Examiner will provide the candidate with the supplied Instrument Test Record (ITR02) that records the new specification. The Examiner will need to add the new range of the level transmitter to the ITR Sheet before giving it to the candidate.

The Examiner should make available a range of test equipment from which the candidate will be required to select the appropriate ones for the re- configuration and recalibration of the level transmitter.

The Examiner should make available to the Candidate a copy of a selection of vendor installation and commissioning manuals from which the candidate will need to select the appropriate one for the test.

Technical Assessment – This test is to re-range a displacement type level transmitter (LT-10022) by a 20% increase or decrease of its current settings. The work MUST be carried out with the transmitter in the level bridal and in a “live” operational status on a process vessel. Work MUST include a full function check of the transmitter to the new specification using a suitable test medium with the results recorded on the supplied Instrument Test Record (ITR02). The candidate is also required to isolate and re-commission the transmitter in line with safe working practices.

Objective - To ensure a candidate has the skills, knowledge and ability to reconfigure, calibrate and function check a displacement type level transmitter. The candidate will have to demonstrate they can work safely throughout the work scope and complete the appropriate documentation to the required standard.

Technical Assessment Requirements

Range of screwdrivers (flat, crosshead and Phillips)
Range of spanners (open ended, combined and ring)
Range of Allen keys (Metric & Imperial)
Range of test ancillary equipment (flanges, joints, compression fittings etc.)
Hammer
Strap Wrench
Tape measure
Digital Volt Meter (DVM) & Test Leads
Tangy Pump or equivalent hand operated liquid transfer pump
Vessel with integrated, isolation & drain valves, level bridal and displacement type level transmitter
with electrical feedback to indicator. See drawing MPS02 for level transmitter specification
Selection of Level Transmitter Vendor Manuals (Installation and Commissioning)
Test medium
Personal Protective Equipment
Examiner instructions
Model Answer Sheet
Candidate instructions
Instrument Test Record (ITR02)
Candidate Question Paper
Examiner Results Report

The candidate is expected to complete the test whilst being observed using correct the correct tools, equipment, service supplies and established techniques, to achieve the specification. The activity must be completed using safe working practices to achieve a „PASS‟. Where the candidate does not achieve the set criteria this is recorded as „REFERRED‟ and a brief note recorded on the criteria not met in the test activity.

The candidate must record a PASS in all practical test sections and score a minimum of 80% in the multiple choice section.