MAX II
Bolt Tension Monitor
89
40) Apply a drop of couplant to the cal bar or transducer and attach it to one
end of the
3” calibration bar
. Make sure it is in the original position when
the measurement was first taken.
41) Press the
ENTER
key to display the measurement screen.
42) Press the
key to automatically setup and measure the 3” cal bar.
Note:
Rotate the transducer clockwise and counter clockwise applying a small
amount of pressure to eliminate any excess couplant between the
transducer and cal bar surface. Continue to rotate until the actual length of
the cal standard is being displayed.
This ensures the transducer is back to
the original position when the zero measurement was first taken.
40) Press the
key to display the
CAL DATA
group.
41) Press the
UP
,
Down
,
Left
,
Right
arrow keys multiple times using the
left button wheel to highlight
A1
for the first reading of the 3” cal bar.
42) Press the
ENTER
key to store the measurement in location
A1
.
Note:
The
MAX II
is now properly zeroed and ready for action.
This next section demonstrates how to go back and verify if the probe zero value is
still linear and “In Spec” at a later time.
It’s important to note that user should never
have to change or re-calculate the probe zero value again, unless the MAX II,
transducer, or cable has been replaced
. If the transducer or cable has changed, and
the probe zero value re-calculated, the change in the zero value should be very
small. Therefore, if the zero is re-calculated and the delta is very large, something
else has gone wrong and the user should become suspicious of the how well the
zero/cal was performed.
If we consider the initial probe zero value constant, as the hardware cal bars or glass
block have not been replaced, the future verifications should always show an
elongation value of +/- 0.0005”, in order to be considered “In Spec”. If the probe
zero/cal is out of spec, the user should redo the zero/cal procedure in its entirety.
The next section outlines the verification procedures.
Summary of Contents for MAX II
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