Lakeshore 425 - Inside and Outside Parameter; Alarm Sort Parameter; Alarm Audible Parameter; Relay

38 cHAPTER 5: Advanced Operation
Model 425 Gaussmeter
5.2.3 Inside and
Outside Parameter
The inside and outside parameter allows you to choose whether the alarm activates
when the field reading is either inside or outside the user-specified setpoints. Choos-
ing the inside setting means the alarm will activate when the reading is inside the
range of the high and low setpoints. Choosing the outside setting means the alarm
will activate when the reading is outside the range of the high and low setpoints. The
inside and outside parameter works in conjunction with the magnitude and algebraic
parameter.
Menu navigation:
Alarm/Relay (press and hold for 3 s)Qmagnitude/algebraicQ inside/outside (inside, out-
side)
Default: outside
Interface command: ALARM
5.2.4 Alarm Sort
Parameter
You can configure the Model 425 alarm to display a pass or fail message when used in
repetitive magnet testing situations or sorting operations. When the sort parameter
is on, pass or fail will be displayed on the lower portion of the display. When the read-
ing is in between the high and low alarm setpoints, ***Pass*** will be shown. When
the reading is outside of the setpoints, Fail High or Fail Low will be shown, depending
on which setpoint the measured field has crossed. The sort message can be turned on
or off as necessary and does not affect other operations of the alarm feature.
The sort parameter is dependent on the magnitude and algebraic parameter, but is
independent of the inside and outside parameter. This means that ***Pass*** is
always shown between the high and low setpoints.
Although it is not a typical situation for sorting operations, when the inside and out-
side parameter is set to inside, the instrument will show ***Pass*** when it is in the
alarming state. Refer to section 5.2.7 for examples of alarm and relay.
Menu Navigation
Alarm/Relay (press and hold for 3 s)Q magnitude/algebraicQ inside/outsideQ
audible Q sort (on, off)
Default: off
Interface command: ALARM
5.2.5 Alarm Audible
Parameter
The Model 425 has an audible alarm annunciator or beeper. The beeper will sound
when the instrument is in an alarming state. If the beeper is not appropriate for your
application, you can turn it off.
Menu navigation:
Alarm/Relay (press and hold for 3 s)Qmagnitude/algebraicQ inside/outsideQ audible
(on, off)
Default: on
Interface command: ALARM
5.2.6 Relay
The Model 425 has one mechanical relay that you can connect to external control
equipment. It is most commonly associated with the high and low alarms, but it can
be controlled manually and used for other purposes. When the instrument is powered
off, the relay defaults to its normal state. The relay is rated for 30 VDC and 2 A, and its
terminals are located in the auxiliary I/O socket on the Model 425 rear panel. Refer to
section 8.7 for rear panel connector definitions.