Lake Shore Model 475 Gaussmeter User’s Manual
4-4
Operation
4.3.2
General Keypad Operation
The Model 475 uses four basic keypad operations, direct operation,
press and hold
, setting selection and data entry, for
the majority of operator interface. A few specialized keypad operations, such as User cable and Probe extension cable
programming, are described in the individual operation paragraphs.
Direct Operation:
Occurs immediately when the key is pressed.
DC, RMS, Max Hold, Peak, Relative,
and
Reset
are
examples of keys that operate this way.
Press and Hold:
Occurs when the key is pressed and held for approximately 4 seconds. It is used to modify less
frequently changed setup parameters. This operation is described in the individual key paragraphs for the keys that have
this available.
Setting Selection:
Allows the user to select from a finite list of parameter values. During setting selection the
s
and
t
keys are used to select a parameter value.
Enter
is used to accept the change and advance to the next parameter.
Escape
will cancel the change to that parameter and return to the normal display. Setting selection screens always include the
message: “Select with
s t
”.
Data Entry:
Allows the user to enter numeric parameter values using the data entry keys that are printed on the key tops.
Data entry keys include numbers from 0 to 9, sign, and decimal point. The labels printed above the keys describe the key
function during normal operation. When one of the keys is pressed and a data entry sequence is started, the keys follow
the data entry functions printed on the key tops. Once the correct parameter value is entered press
Enter
to accept the
change and advance to next parameter. Pressing
Escape
once will clear the new value and restart the setting sequence.
Pressing
Escape
again will return to the normal display. Data entry screens always include the message: “Enter for”,
followed by the parameter being set.
Related setting selection and data entry sequences are often chained together under a single key. To skip over a
parameter without changing its value press
Enter
before pressing an arrow or number key. To return to the normal
display in the middle of a setting sequence press
Escape
before pressing an arrow or number key. Changes “entered”
before
Escape
is pressed are kept.
4.4
DISPLAY SETUP
In normal operation, the two row by twenty character vacuum fluorescent display provides magnetic readings on the top
row and special information or readings on the bottom row. The user may configure the bottom row of the display.
4.4.1
Two-Line Display Configuration
The Model 475 can be configured to display different values on the bottom line of the display. The following list gives a
description of each setting.
Blank
No Bottom line display.
Field
Display the present field reading. This is useful if the top line is used for Max Hold.
Temp/Freq
Display the probe temperature if available and display the frequency if in RMS.
Relative SP
Display the relative setpoint.
Control SP
Display the field control setpoint
Sort Message
Display the pass/fail message related to the Alarm feature.
To configure the display, press
Display
. The display configuration screen appears as a prompt for the data to display on
the bottom line.
Sel ec t Wi t h ° ®
L i n e 2 Bl a n k
Use the
s
or
t
key to select one of the display items, Blank, Field, Temp/Freq, Relative SP, Control SP, or Sort
Message. Press
Enter
to accept the new selection and return to the normal display. Press
Escape
to cancel the new
selection and return to the normal display.
