Laserscale BS75A-R, Manual

Page: 21 / 56

19
2. OPERATING PRECAUTIONS
•
The wavelength of the semi-conductor laser used for
this scale unit is 780 nm that is out of the visible range,
and the maximum output is 3 mW.
• The light transmitted from the scale head is detrimental
to the human body, though it is not visible for the human
eyes. Never open the cover of the detector head
assembly.
As there is a danger of light leakage, never try to insert
other objects than the scale through the scale insertion
openings when the power is on.
• Each scale bears a label showing a scale pitch
compensation value proper to the scale. Before
operation, be sure to set the display unit or the detector
to this value. (See page 22)
• A static electricity proof cap is attached to the connector
plug of the scale unit. Do not remove this cap until
connections to the detector or display unit have been
completed. After removing the static electricity proof cap,
take care not to touch the connector pins as this might
cause trouble.
• Be sure to make all the connections of the scale unit
connector and the display unit or the detector receptacle
before switching the power on. Never insert or pull out the
connector when the power switch is on.
• Do not pull at the cable forcibly or bend it.
(Bending radius: over 50 mm/1.97" inside.)
• Use the BS75A-R approximately 30 minutes after power is
supplied to the unit, when the temperature of the detector
head reaches a stable state.
•
The BS75A-R is a precision measuring instrument. Handle
it with extreme care so that no excessive shock is applied
to it. For transport, be sure to pack it in the same way as it
was packed at the time of purchase.