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Proton Products SL mini and SLR mini Series Speed and Length Gauges Instruction Manual - issue 1s
KEY SWITCH
The key switch is provided for compliance with laser safety regulations.
When the key switch is in the open-circuited (“O”) the laser diode in the gauge is DISABLED
for laser emission.
When the key switch is in the short-circuited (“I”) the laser diode in the gauge is ENABLED for
laser emission.
After the key switch is set to the enabled (“I”) position, a warm up period is required to for the
laser diode to stabilise before measurements may be taken. The key-switch is intended for
intermittent use such as locking out the laser at the end-of-shift or during line maintenance.
A removable shorting-link connects the LSR_EN pin via the key-switch to DGND; removal of
this shorting link disables the key-switch and permits an external, user-supplied interlock
switch to be wired in place of the key-switch.
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