The RELATIVE mode allows a specific flux density value to be subtracted from all incoming readings. When the RELATIVE mode is active, all
incoming readings are "relative" to an offset selected by the user. For example, if the displayed value is +100 gauss when RELATIVE mode is
activated, and the flux density at the probe changes to +150 gauss the displayed value will be +50.0 gauss. If the flux density then drops to
+50 gauss, the value displayed by the meter will be -50 gauss. The RELATIVE mode allows for the direct readout of variations around a given
field level, whether static (DC) or alternating (AC).
There are two ways to generate a relative value. When AUTO RELATIVE is selected, the meter uses the present flux density reading as the
relative value. When MANUAL RELATIVE is selected, the user can specify a desired relative value using the Up, Down, Left, and Right Arrow
buttons. Each mode will be discussed in more detail.
There are two restrictions when using the RELATIVE mode.
1) The RELATIVE mode can only be used in a fixed range. If the AUTO RANGE feature is in use and the RELATIVE mode is turned on, the
AUTO RANGE feature is disabled. Conversely, if the RELATIVE mode is turned on and the AUTO RANGE feature is activated, the RELATIVE
mode is disabled.
2) If the meter is in the RELATIVE mode and a ZERO function is selected, (either MANUAL ZERO or AUTO ZERO), the RELATIVE mode is
disabled.
There may be situations when the user may prefer to shield the probe from all external magnetic fields prior to performing a RELATIVE
operation. Provided with the meter is a ZERO FLUX CHAMBER which is capable of shielding against fields as high as 30 mT (300 G or 23.88
kA/m). The probe is simply inserted into the chamber before the RELATIVE operation begins.
NOTE: The RELATIVE mode is disabled when the probe and meter are zeroed or if the meter’s power is cycled.
NOTE: If the analog output is being used, the output signal will continue to represent the flux density as seen by the probe. The analog output
is not affected by the RELATIVE operation.
Handle the Hall probe with care. Do not bend the stem
or apply pressure to the probe tip as damage may
result. Use the protective cover when the probe is not
in use.
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