READING ER PROBES
19
A series of > symbols will accumulate from left to right across the screen to indicate the
progression of the measurement function At the conclusion of the measurement function
(approximately 30 seconds) the CheckMate™ will display the probe reading, the current
check reading and the initial check reading in divisions. The initial check reading in
divisions will be shown in parenthesis (). A typical display is shown below:
where 273.4 is the
Metal Loss
reading in divisions, 812 is the present
Check
reading in
divisions and (813) is the initial
Check
reading in divisions.
Pressing the
Read (F1)
key will return to the
Taking Probe Reading
display and
automatically start a new measurement cycle. Press the
Save (F3)
to go to a display that
allows the user to save the readings by pressing the
Yes (F1)
key which will go directly to
the
Probe Reading Saved
display which is explained below or pressing the
No
key will
discard the reading and return to the
Read Probe By
display. Press the
More (F2)
key
to go to the
MLoss
and
Rate
display:
The cumulative metal loss,
MLoss
, in the engineering units originally selected will be
displayed and the corrosion rate between the previous probe reading and the present
probe reading will be automatically calculated. The corrosion rate,
Rate
, will be displayed
in the engineering units originally selected per year.
Example:
A T10 ER probe (span 5 mils) was installed in a refinery overhead system on
March 1, 2004. The initial probe reading of 97.3 divisions and check reading of 813 was
made on March 1, 2004. On March 30, 2004, the probe was again read and the results
were as shown in the typical display above, i.e. Div: 273.4 and Check: 812. The corro-
sion rate calculated between these two measurements would be equal to 10.7 mpy (mils
per year).
Summary of Contents for CHECKMATE
Page 6: ...2 CHECKMATE Figure 1 1 CheckMate Instrument 4 3 3 00 3 1 20 MIN 80 MIN 2 0 7 75 ...
Page 28: ...24 CHECKMATE ...
Page 32: ...28 CHECKMATE Pressing Enter F1 will go to the ID Configured display ...
Page 34: ...30 CHECKMATE Press More F1 one more time to go to the third screen of information ...
Page 38: ...34 CHECKMATE ...