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Proton Products SL mini and SLR mini Series Speed and Length Gauges Instruction Manual - issue 1s
K
EY 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.