User Instructions Chapter 4

4-4 Setting Up and Using Laser Alignment Fixtures
General Description
Sensor Head Description
The sensor head with the laser source on top is the “Master” head (known
as head “A”). The other head is the “Slave” (known as head “B”). The model
number is listed on the back of each head. They can be identified by the
letter A or B on the front.
The difference between the Model 8215 sensor heads and the 8225 sensor
heads are the target (PSD) size, laser distance, and the front overlay. The
8215 sensor head has a 10mm x 10mm PSD with a 30’ laser while the 8225
sensor head has a 20mm x 20mm PSD with a 100’ laser.
The Activity LED on the front panel can be red, yellow, or green. An expla-
nation of their meaning is shown in the following table.