Troxler EGauge 4590, Руководство по эксплуатации и инструкции

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4–10
limits, an
F
displays. If you do get an
F
, or
fail
, display
check for the following conditions:
♦
Is the source rod in the proper position?
♦
Are any other gauges nearby?
♦
Is the gauge seated correctly on the soil?
♦
Is the base of the gauge and the top of the soil both
smooth and free of debris?
1 1 4 4 . . If all other conditions are normal, do not accept the
standard count just taken. Press
〈
NO
〉
and take
another
standard count.
NOTE
If the second count also fails, the old standard count
sets should be erased as described in Chapter 7.
Successive standard count failures are usually the
result of a prolonged period between the last
standard count and the new one. This causes the
tolerance to be exceeded because of source decay.
After the old standard counts are erased, four new
standard counts should be taken. Compare the
new standard counts to those shown in the recent
calibration report. The DS should fall into the
range shown by month on pg. 2 of the report. The
standard background count should be within 1%
of that shown on the top of each page of the
report.
1 1 5 5 . . Press
〈
YES
〉
to accept the new standard count and enter it
into memory. If
〈
NO
〉
is pressed, the new count is not
accepted, and the display returns to show the old values.