Lake Shore Model 421 Gaussmeter User’s Manual
Operation
3-1
CHAPTER 3
OPERATION
3.0 GENERAL
This chapter describes Model 421 Gaussmeter operation. The front panel controls are described in
Paragraph 3.1. Paragraphs 3.2 thru 3.14 describe the various front panel functions in detail. Model 421
default settings are defined in Paragraph 3.15. Finally, Paragraph 3.16 provides probe handling
considerations. Refer to Chapter 4 for detailed information on remote operation (serial interface).
3.1 DEFINITION OF FRONT PANEL CONTROLS
This paragraph provides a description of the front panel controls on the Model 421.
3.1.1 Front Panel Keypad
The keys on the front panel are defined as follows. Note the following are abbreviated descriptions of
each key. A more detailed description of each function is provided in subsequent paragraphs.
Max Reset
Works with the Max Hold function. Clears Max reading back to current reading.
Press and hold to reset parameters to default values. This key also acts as an
escape key during numeric entry.
Max Hold
Turns the Max Hold feature on and off. Use
Max Reset
key to clear reading.
Press and hold to lock keypad.
Zero Probe
Used to zero or null effects of ambient low level fields from the probe.
Range
Selects a manual field measurement range or Autorange. Available ranges are
dependent on which probe is installed.
AC/DC
Selects periodic AC (RMS) or static (DC) magnetic fields. Press and hold to turn
Filter on or off.
421_Front.bmp
Figure 3-1. Model 421 Front Panel
