24
Correction factors can be used:
•
When there is only a single emitter being surveyed.
•
When there are multiple emitters all operating at the
same frequency (this is often the case with industrial
equipment).
•
When there are multiple emitters with frequencies that
are close to each other and the nearest calibration
frequencies have very similar correction factors.
Correction factors should NOT be used:
•
When the frequencies of the emitters are diverse.
Correction factors may vary considerably and there is no
way to determine the distribution of energy from the
various emitters. It is more accurate not to use a
correction factor under these conditions. See
Measurement Uncertainty
on page 26.
To use a correction factor for a probe in memory...
1.
Press
F4
(
FREQ
) from the measurement screen. A
new screen will appear to allow you to enter a
frequency.
2.
Enter the frequency for which you want to correct for.
Make sure you fill in all four positions. If you make a
mistake just enter more digits until correct. For greater
accuracy, use the units that allow the larger
numbers. For example, enter 10 kHz, not 00.01 MHz.
3.
Change the units (if needed) by pressing either
F1
(
kHz
),
F2
(
MHz
), or
F3
(
GHz
).
4.
Press
F4
(
SAVE
). The meter will automatically
calculate the correction factor for the frequency you
have entered from the two closest correction factors
that were stored when you put the probe in memory.
The calculated numeric value will be displayed briefly
before the meter automatically returns to the
measurement screen.
5.
The frequency that you are correcting for will be
displayed on the right side of the third line of the
display.
