5
5
3.0 Operator Qualifications
The Curlin AIR's concept and design makes it the most unique ultrasonic flaw detector available.
In order for the owner of this advanced technology instrument to fully benefit from the unique features
of Curlin AIR, the assigned operator(s) must be experienced and well-founded in the fundamentals of
ultrasonic testing. Operators should fully possess the qualifications of ultrasonic testing personnel as
defined in Recommended Practice No. SNT-TC-1A, Personnel Qualification and Certification in
Nondestructive Testing, available from the American Society for Nondestructive Testing (ASNT), 1711
Arlingate Lane, P.O. Box 38518, Columbus, OH 43228-0518, phone (614) 274-6003, FAX (614) 274-
6899, telex 245347.
3.1 Operational Notations
In order to simplify these instructions, certain consistent notations are used. In some cases, a
single key stroke produces a desired change; other changes may require a sequence of key strokes or
require continued key activation to "scroll" changes. The following terms and operational notations will
be used throughout. The operator is advised to become familiar with all of them.
KEYS
On the sealed membrane keypad are two types of keys: the arrow keys and the direct access
keys. In general, the arrow keys are multi functional, being used to change from one highlighted
menu item to another, or to increase or decrease or change variables. The direct access keys
and SEL/HELP keys are also multi functional, being used to select, or enter, a variable, or to
access the HELP screens.
VARIABLES
On analog-type ultrasonic instruments, a variety of knobs are available to change continuous
variables such as range, delay, gate positions, alarm levels, and reject. The same variables are
addressable in Curlin AIR; instead of knobs, holding down a key changes the variable.
SCROLLING
When a key is continuously depressed to change a variable, the effect is referred to as "scrolling".
Scrolling produces either a visible change in the display, a digital readout of the changing value of
the variable, or both.
TOGGLING
Toggling refers to the kinds of changes made by "toggling" switches on an analog-type instrument.
Functions such as OFF/ON, SINGLE/DUAL, and other discrete, limited value operations are
examples of toggling. With the Curlin AIR, toggling requires depressing a key to change a
function from one state to another (OFF/ON, for example), and again depressing the key to further
advance or reverse the discrete function.
CURSOR
This term refers to the means for notifying the operator which menu item, function or variable can
be currently acted upon. In the Curlin AIR, the cursor location is indicated by highlighting the
menu item. Changing the location of the cursor is accomplished by using the arrow keys. In
some menus, when that menu is exited, and later re-entered, the cursored item will be the one last
selected. In other menus, for operator convenience, the cursor defaults to a "home" item, the item
most often used in that particular menu.
NOTE:
The Curlin AIR is a type of computer in operation, relying heavily on it’s extremely sophisticated
software for much of it’s operation. Should the unit ever seem non-responsive to the front panel
keys or if the operator would like to set the instrument in the factory default use the following
keystrokes. First, turn the Curlin AIR off using the on/off key. If the unit won’t turn off in this
