Lake Shore Model 421 Gaussmeter User’s Manual
3-8
Operation
ALARM AND RELAY (Continued)
When the alarm is turned on, two additional setting screens will appear for high and low alarm
setpoints. These values establish the limit for an error condition or the pass/fail limits for magnet testing.
The values can be entered with the display resolution on any range available for the probe being used.
The setpoint values are entered as positive numbers since the alarm feature uses the absolute
(unsigned) value of field for comparison. Operation of the alarm setpoints is best understood when
viewing the alarm inside/outside parameter examples below.
To enter the high alarm setpoint continue from Alarm On/Off or press the
Alarm
key and press the
Enter
key until the following display appears.
Enter High Alarm
1.5000 kG
The high alarm setpoint requires numeric data entry. Numbers can be entered with up to 5 digits of
resolution in any field range available for the probe being used.
To begin number entry look at the range and resolution of the present parameter value. If it is too small
to accommodate the new value, or too large to allow appropriate resolution, change the setting range
by pressing the
Range
key. Pressing the
Range
key will cycle through all available setting ranges and
zero the setting value.
The most significant digit of the entry value will blink to indicate that digit can be changed. Use the
s
or
t
keys to change that digit to the desired value. Digits should be set to zero if not used. Press the
Enter
key to advance to the next digit. Continue until all digits are set. When the
Enter
key is pressed
on the last digit the setting value will be stored. If a mistake is made press the
Range
key to select a
new range and start over or press
Max Reset
to escape out of the setting function.
After entering the desired high alarm point, press
Enter
to accept the new value. The display proceeds
to the Low Alarm Point as follows:
Enter Low Alarm
0.5000 kG
The low alarm setpoint requires numeric data entry. Numbers can be entered with up to 5 digits of
resolution in any field range available for the probe being used.
To begin number entry look at the range and resolution of the present parameter value. If it is too small
to accommodate the new value, or too large to allow appropriate resolution, change the setting range
by pressing the
Range
key. Pressing the
Range
key will cycle through all available setting ranges and
zero the setting value.
The most significant digit of the entry value will blink to indicate that digit can be changed. Use the
s
or
t
keys to change that digit to the desired value. Digits should be set to zero if not used. Press the
Enter
key to advance to the next digit. Continue until all digits are set. When the
Enter
key is pressed
on the last digit the setting value will be stored. If a mistake is made press the
Range
key to select a
new range and start over or press
Max Reset
to escape out of the setting function.
The alarm setpoints are absolute (unsigned) i.e., only the magnitude of the field reading is used.
Содержание Model 421
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