NDT Lab Simulator: Bench Specimens, Reference Blocks and Calibration
The NDT laboratory is where most Practical NDT trainees start. It is a bench setting with specimens and reference blocks, built for learning each method from first principles before the work moves to weld coupons, plant or aircraft. Known-defect teaching samples are labelled as such. Examination specimens carry unidentified reflectors whose key is held separately by the instructor.
What the lab stages
- Reference blocks for calibration: in a UT job you calibrate on two references before a single scan is credited.
- Bench specimens for each method; the UT runtime alone carries 22 specimen datasets (nine base-metal, ten weld and three casting).
- Film radiography with darkroom processing, where opening the door while film is processing spoils the film and withdraws its review.
- Positive material identification by XRF on alloy references and unidentified samples, with light elements reported as not measured.
- An equipment register of 50 instruments, probes and accessories, each referenced to the manufacturer documentation of a named real model.
Teaching samples and examination specimens
The lab separates learning from assessment. A labelled known-defect sample is for learning what an indication looks like; a keyed examination specimen is for showing you can find it without being told. The learner record deliberately leaves out the hidden definitions of examination specimens, so the answers cannot be read from it, and your written interpretation goes to the instructor for review rather than being scored by the software. Instructor time moves from watching set-up to correcting interpretation and judgement.
Methods to start with in the lab
Start with the method you are training for: the ultrasonic testing, radiography, magnetic particle, penetrant, visual and eddy current simulators all have bench jobs here, and the phased array practical shown on the hub is a bench set-up. Run a first job at the guided level, which shows the instruction, the expected result and the recovery for each step, then repeat it coached and independent before moving to a workplace.
What the specimens are there to teach
Bench specimens are not damaged plant; they are built to teach the reflectors and discontinuities a procedure is written to find, under conditions where the answer can be checked. That is the value of a lab: every attempt can be compared with a known key, the same specimen can be run again on a different day, and a trainee can see how a change of probe, angle, exposure or field direction changes what appears, before the complications of real geometry arrive in the welding workshop and on the process plant.
What the lab jobs reference
Each job binds a work order, an objective, syllabus references and the pinned revisions of its environment, specimen, procedure and equipment, and every practical follows the platform's twelve-step procedure. The training report states that it is a training record only, that interpretation requires instructor review and that code acceptance is not evaluated. Acceptance against a construction or in-service code is taught in the course and applied on real work.
What a virtual lab cannot reproduce
Real blocks have surfaces, wear and couplant behaviour; real instruments have noise and drift. Of the 50 equipment definitions, 21 are documented against manufacturer references and none has yet been compared with measured signals or validated, and the PMI reference samples are not certified reference materials. That is why the lab in the simulator prepares you for the real lab rather than replacing it.
Frequently asked questions
Should a trainee start in the NDT lab?
Usually, yes. The lab is the bench setting for learning each method from first principles, with reference blocks for calibration and labelled teaching samples, before moving to weld coupons, plant or aircraft.
Can the trainee see the answers to an examination specimen?
No. The key is held separately by the instructor and the learner record leaves out the hidden specimen definitions.
Are the PMI reference samples certified reference materials?
No, and the job brief says so. They are teaching samples.
Which methods can I practise in the lab?
All the core methods have bench jobs here, from UT calibration on reference blocks to film radiography, magnetic particle, penetrant, visual and eddy current, plus PMI by XRF on alloy samples.
Next steps
Practical NDT is a training simulation, not a validated engineering tool. It runs in a standard browser, works offline once downloaded, extends to standalone headsets and is integrated with the Atlantis LMS and ERP, so learners reach it from the client portal with one sign-in. Practice in it does not replace the practical examination or the experience hours your written practice requires.
Speak to an ASNT NDT Level III
Discuss your inspection requirements with Atlantis NDT. Include the asset, method, location and documents you need reviewed.