4
45MG —Getting Started Guide
10. Reinstall the optional protective rubber boot, if required.
11. Press
to turn on the 45MG instrument.
12. To answer the question appearing at the bottom of the screen:
Select
Alkaline
when using three AA-size alkaline batteries.
OR
Select
NiMH
when using three AA-size nickel-metal hybrid (NiMH) batteries.
OR
Select
Lithium
when using three AA-size lithium batteries.
13. Press
[ENTER]
.
You can also operate the 45MG using three AA-size NiMH rechargeable batteries. The 45MG does not
recharge NiMH batteries. The batteries must be recharged using a commercially available external
battery charger (not included).
To Start Using a D79X Dual Element Transducer
1.
Plug the transducer into the transducer connectors located on the top of the instrument.
2.
Press
to turn on the instrument.
3.
Wipe the couplant off the transducer tip, and then press
[2nd F]
,
[CAL ZERO] (Do ZERO)
.
The 45MG is now ready to take thickness readings using the default velocity for the test block
supplied with the instrument.
To Start Using a Single Element Transducer (Optional)
The 45MG comes with factory default settings for the transducers purchased. The default settings use
an approximate sound velocity for the stainless steel test block provided with the instrument.
1.
Connect the transducer to the transducer cable, and then plug the cable into the T/R 1 connector
on the top of the instrument.
2.
Press
to turn on the instrument.
3.
Press
[2nd F]
,
[FREEZE] (XDCR RECALL)
.
4.
In the menu, select
DEFAULT SINGLE ELEMENT
, or any custom single element.
5.
In the
SELECT SETUP
list of the
DEFAULT SINGLE ELEMENT
screen, highlight the setup that
corresponds to the transducer being used, and then press
[ENTER]
.
6.
In the
ACTIVE
screen, if needed, edit the parameters to match the characteristics of the transducer
being used, and then press
[MEAS]
.
The 45MG is now ready to take thickness readings using the default velocity for the test block
supplied with the instrument.
To Calibrate the Instrument
The 45MG must be calibrated to ensure the thickness measurement accuracy for the transducer and
the tested material being used. This is achieved by performing the velocity and zero calibrations on
two known thicknesses of a test block (such as a five-step test block, as shown below) made out of the
same material as the inspected parts.
1.
Place couplant on the surface of the thick sample of the test block.
