MANUAL ZERO FUNCTION
The second zeroing method is a manual adjustment. This feature also allows the user to set the “zero” point to something other than zero, if
desired. Position the probe for zeroing, then start a manual ZERO operation. The screen will display the
actual DC flux density readings. The
meter will select the lowest range regardless of which range was in use prior to selecting the ZERO function. If the reading before zeroing the
probe exceeds ±30 mT (300 G or 23.88 kA/m) when the probe is in a zero chamber or very low field, then the probe may be defective. The
meter will switch over to the DC mode of operation during zeroing. Recall that the zeroing operation affects DC offsets only. If you wish to
suppress an AC field reading, consider using the RELATIVE mode.
NOTE:
Making a manual ZERO adjustment not only affects the lowest range, but also the higher ranges to a lesser extent. For example,
assume an automatic ZERO has already been performed, after which all three ranges should read zero. Now a manual adjustment is made
that causes the reading on the lowest range to be nonzero. The reading on the other ranges may also be nonzero depending upon the
magnitude of the change. The adjustment has 10 times less effect on the middle range and 100 times less effect on the highest range.
NOTE:
Zeroing the probe cancels the RELATIVE mode if it was turned on.
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