Extech Instruments TKG250, Руководство пользователя

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TKG250 Ultrasonic Thickness Gauge
7
Probe Zero
When turning on the TKG250, the gauge does an automatic zeroing of the transducer
thus eliminating the need for an on-block zero. It will also electronically zero the
transducer upon power up and at a particular time during normal operation. This feature
ensures the transducer is working in accordance with electronic zeroing procedures. This
feature is particularly important on high temperature materials and when the transducer
becomes worn.
Important Notice: Please make sure the transducer is not coupled to the test piece when
the gauge is first turned on and that there is no couplant on the end of the transducer. The
transducer should also be at room temperature, clean without any noticeable wear.
For a more accurate “span” of calibration, Flir Systems recommends a zero calibration
and sound velocity calibration as well.
Upon first turning on the gauge, you can match the transducer part number on the back of
the transducer to the screen, wipe couplant off face and press
MENU OK . Here is what
the first screen will look like, see reset and backlight sections for additional details.
Keypad Functions
The figure below shows the full keypad. Refer to the following table that lists the
function of each key on the keypad.
Key Function