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OPERATION & MAINTENANCE SPECIFICATIONS MANUAL
Section:
EQUIPMENT/TOOLS
SCOPE
This section is intended for the guidance of NDE personnel qualified in accordance with the requirements of
M&NP "Training and Qualification of Personnel". The inspection processes and procedures described in this
document may be used for line pipe, piping components and pressure vessel plates. Ultrasonic Thickness testing
may also be used to evaluate the thickness of the parent material after grinding etc. This procedure is not
intended to be exhaustive in the treatment of ultrasonic technique as it is provided for general guidance only.
SAFETY
Prior to excavation for inspection, verification shall be made that the pipeline has been established at a safe
working pressure in accordance with the requirements of O&MSM Section 12, Reference 17 - Safe Working
Pressure. Defect excavation shall then be completed in accordance with the requirements of O&MSM Section 11,
Reference 13 - Defect Excavation and Assessment.
EQUIPMENT
A.
INITIAL SETUP
1. Introduction
For those settings which are seldom changed during operation of the T-Mike E the INITIAL SET UP
procedure is designed to allow the operator access to those settings without unnecessary complication of
the units normal operation.
These settings include:
Backlight on/off
Selection of Metric or English units of measure
Calibration Lock
Procedure Issue Date: February 2007
Approved by:
Subject:
ULTRASONIC THICKNESS MEASUREMENT
Figure 1
T-MIKE E
Revision
2
Section No.
Reference No.
09
07
Page 1 of 10
Related Manuals for GE StressTel T-MIKE E
Summary of Contents for GE StressTel T-MIKE E
- Page 1 Section No. Reference No. OPERATION & MAINTENANCE SPECIFICATIONS MANUAL Section: Subject: EQUIPMENT/TOOLS ULTRASONIC THICKNESS MEASUREMENT SCOPE This section is intended for the guidance of NDE personnel qualified in accordance with the requirements of M&NP “Training and Qualification of Personnel”. The inspection processes and procedures described in this document may be used for line pipe, piping components and pressure vessel plates.
-
Page 2: Operation
Section No. Reference No. OPERATION & MAINTENANCE SPECIFICATIONS MANUAL Section: Subject: EQUIPMENT/TOOLS ULTRASONIC THICKNESS MEASUREMENT The INITIAL SET UP procedure is accessed by holding the CAL key down and pressing the ON/OFF key. When this is done the T-Mike E will display the version code of the operating software contained in the unit until the CAL key is released. - Page 3 Section No. Reference No. OPERATION & MAINTENANCE SPECIFICATIONS MANUAL Section: Subject: EQUIPMENT/TOOLS ULTRASONIC THICKNESS MEASUREMENT Lemo quick-disconnect transducer connectors. Battery charger connector / data port. Built-in calibration block. Coupling indicator. Backlit amber LCD indicates modes, measurements and icons. Durable, lightweight, extruded aluminum case. Environmentally sealed keypad.
- Page 4 Section No. Reference No. OPERATION & MAINTENANCE SPECIFICATIONS MANUAL Section: Subject: EQUIPMENT/TOOLS ULTRASONIC THICKNESS MEASUREMENT 3. Material Calibration to Known Thickness The following procedure is used to calibrate the T-Mike E sound velocity to a known sample of material. Some materials may exhibit sound velocity variations which can cause errors in measurement. Be sure to check a representative group of samples to determine if such variation is present.
- Page 5 Section No. Reference No. OPERATION & MAINTENANCE SPECIFICATIONS MANUAL Section: Subject: EQUIPMENT/TOOLS ULTRASONIC THICKNESS MEASUREMENT IN /µ s . 2 3 3 0 Or if metric units are selected: m / s 5 9 1 8 Use the UP and Down arrow keys to scroll to velocity to the known velocity of the material. Note that when these keys are held continuously, the speed that the velocity changes will increase, making it easy to make the large adjustments for materials such as plastic and aluminum.
- Page 6 Section No. Reference No. OPERATION & MAINTENANCE SPECIFICATIONS MANUAL Section: Subject: EQUIPMENT/TOOLS ULTRASONIC THICKNESS MEASUREMENT The T-Mike E will display the thickness of the material and the appropriate units of measure (inches or millimeters). NOTE: If the detected echo is of marginal magnitude a question mark? Will appear to the left of the echo indicator.
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Page 7: T-Mike Programmable
Section No. Reference No. OPERATION & MAINTENANCE SPECIFICATIONS MANUAL Section: Subject: EQUIPMENT/TOOLS ULTRASONIC THICKNESS MEASUREMENT T-MIKE PROGRAMMABLE 1. Configuration and Calibration The T-Mike Programmable is preset to display in inches or millimeters; the back light enabled or disabled; and the sound velocity fixed. This can be done at the factory prior to shipping or this may be done by connecting the T-Mike programmable to an IBM compatible computer running special software, or from a T-Mike E. -
Page 8: T-Mike Basic
Section No. Reference No. OPERATION & MAINTENANCE SPECIFICATIONS MANUAL Section: Subject: EQUIPMENT/TOOLS ULTRASONIC THICKNESS MEASUREMENT When you turn off the T-Mike Programmable, it will display the EPROM software version. When you turn on the T-Mike Programmable, it will momentarily display the calibrated sound velocity. Test the T- Mike Programmable on a material sample to verify that it reads the correct thickness. -
Page 9: Helpful Hints On Operation
Section No. Reference No. OPERATION & MAINTENANCE SPECIFICATIONS MANUAL Section: Subject: EQUIPMENT/TOOLS ULTRASONIC THICKNESS MEASUREMENT the LCD will indicate the velocity. Now turn on the T-Mike B. The T-Mike B should display CAL, followed by the new velocity and then will go into the measurement mode. Be sure this new velocity matches with the sound velocity in the T-Mike E. - Page 10 Section No. Reference No. OPERATION & MAINTENANCE SPECIFICATIONS MANUAL Section: Subject: EQUIPMENT/TOOLS ULTRASONIC THICKNESS MEASUREMENT 3. Material Consistency Maximum measurement accuracy will be contained if the work piece and the calibration piece are the same temperature, shape, material, and size. NOTICE Since velocity of sound varies from test piece to work piece, accuracy of measurement depends on consistency of ultrasonic velocity.