Lake Shore Model 421, Руководство пользователя

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Lake Shore Model 421 Gaussmeter User’s Manual
2-6 Installation
INITIAL SETUP AND SYSTEM CHECKOUT PROCEDURE (Continued)
10. Press the Enter key. The
*CALIBRATING*
message will briefly be displayed, followed by a return
to the normal display.
NOTE: If the unit has performed well to this point, the unit is functioning properly. If you have a
reference magnet available, you can continue with the test using the magnet to verify the
accuracy of the Model 421.
11. If continuing the procedure with a reference magnet, ensure the probe can accommodate the
range of the magnet. Use the Range key to select the proper range. Set the display for DC.
Finally, since orientation of the probe is very selective, press the Max Hold key. This will capture
the highest reading (normally the reference magnet calibration value).
CAUTION: Care must be exercised when handling the probe. The tip of the probe is very
fragile. Any excess force may break the probe.
NOTE: Probe readings are dependent upon the angle of the tip in relation to the magnetic field.
This and other effects on probe operation are explained in Paragraph 3.16.
12. Carefully place probe into reference magnet. You may have to hunt around a bit for the maximum
reading. For this example, we are using a 999 ±1% Gauss Reference Magnet. Our reading
appeared as follows:
+ 0.9720 kG DC
0.9950 kG MAX
On the top line, the current reading is +0.9720 kG DC. On the bottom line, the maximum reading
captured was 0.9950 kG, which is within the tolerance of the reference magnet. The top line will
keep changing as the probe moves, but the bottom will remain fixed on the highest reading. To
recapture a new maximum value, press the
Max Reset key.
Once this abbreviated checkout procedure is successfully completed, the unit is ready for normal
operation. Please proceed to Chapter 3 for further operational information.