Lake Shore Model 475 Gaussmeter User’s Manual
4-8
DC Operation
Operation
To zero the probe in the zero gauss chamber, first allow the temperature of the probe and chamber to equalize. (A large
temperature discrepancy affects the quality of the calibration.) Carefully place the probe tip into the chamber. Orientation
of the probe is not critical. Once inserted, press
Zero Probe
. The following screen appears as a prompt to zero the probe.
Pr es s Ent er Wi t h
Pr o b e At Ze r o
Press
Enter
to begin the zero probe process. Press
Escape
to cancel the sequence and return to the normal display.
During the zero probe process, the calibration message below will appear. Do not move the probe until the zero probe
process is complete and the display returns to the normal display.
* CALI BRATI NG*
If during the zero probe process, the measured offset is larger than expected, the Model 475 will put up the following
message alerting to the user that there may be a problem with the probe.
Pr obe Of f s et Lar ger
Th a n Ex p e c t e d
The Model 475 will continue to operate with the offset correction, but it will be up to the individual to investigate the
nature of the offset.
4.6.4
DC Operation Max Hold
The Max Hold function captures the largest (Maximum) or smallest (Minimum) field readings or field magnitudes since
the last
Reset
press. To turn the Max Hold feature on, press the
Max Hold
key. The following screen will appear for
approximately 3 seconds.
Max Hol d On
To turn the Max Hold feature off, press the
Max Hold
key again.
4.6.4.1
Magnitude or Algebraic
The Max Hold function can be configured to use the magnitude of the field reading only, or to include the sign and treat
the readings algebraically. In Magnitude mode, the maximum reading is the field measurement with the largest
magnitude, independent of sign, since the last reset.
