GE DMS Go+ Operating Manual page 106

5 Operation
1-point calibration
The 1-point calibration is carried out using the reference
block at the instrument rear and a calibration block with
known thickness which is made of the same material as
the test object.
Ideally, the wall thickness of the calibration block is the
equal to or slightly greater than the expected readings
from the test object.
– In the function group PROBE&CAL, select the func-
tion THK CAL.
– Choose the option 1-PT.
– In the function group PROBE&CAL, select the func-
tion ZERO.
– Select the method MANUAL.
– In the function group PROBE&CAL, select the func-
tion CALIBRATION.
– Press one of the left or right arrow keys in order to
start the calibration. The message Put probe on
zero block - use couplant is displayed on the
screen.
5-28
– Apply some couplant to the instrument reference
block and couple the probe. The zeroing is started.
After finishing it, the message Probe zero complete.
Remove probe from zero block. is displayed on the
screen.
– Uncouple the probe. The message Couple to Cal
standard (displayed below) or press ENTER to
change cal. block thickness. is displayed on the
screen.
– If the wall thickness displayed on the screen is not
identical with the thickness of the calibration block,
press the function key 2 (function ENTER).
– Select the digits that you wish to change using the
left and right arrow keys, and change the value using
the up and down arrow keys.
– Press the function key 2 (function DONE) in order to
close the process of changing the thickness value.
– Apply some couplant to the calibration block with
known thickness and couple the probe.
Edition 4 (05/2014)
Carrying out the calibration
DMS Go+