5. Operating the Unit (continued)
Setup
1. Install the collar assembly over the part of the light guide receptacle that protrudes
from the front of the unit. Rotate the collar assembly until the scribed line is in the 12
o’clock position. Use the set screw to secure the collar in that position.
2. Insert the input end of the light guide into the light guide receptacle/collar assembly
pushing it as far forward as it will go. Tighten the set screw on to the light guide.
3. Turn on electric power to unit.
4. Set shutter timer to 2 seconds.
5. Insert one of the light guide ends into a Loctite
®
ZETA
®
7021 Radiometer.
6. Press the radiometer start switch.
7. Actuate foot switch to open shutter.
8. Release the radiometer start switch while the shutter is still opened.
9. Read and record the radiometer reading.
10. Position the second light guide in the radiometer.
11. Press the radiometer start switch.
12. Actuate foot switch to open shutter.
13. Release the radiometer start switch while the shutter is still opened.
14. Read and record the radiometer reading.
15. Compare the two radiometer readings.
16. If the lower reading is equal to or greater than 90% of the higher reading, the dual
wand is balanced.
17. If the lower reading is less than 90% of the higher reading, loosen the set screw and
rotate the collar a small increment around the light guide receptacle. Use the set screw
to secure the collar in that position.
18. Take and compare another set of radiometer readings.
19. Continue until the lower reading is equal to or greater than 90% of the higher reading.
20. Tighten set screw to lock the input end of the dual wand in position.
Notice:
If a radiometer is not available, it is recommended that Loctite Service be contacted at
1-800-LOCTITE (1-800-562-8483) to insure optimum performance when installing a
new dual ended light guide.
5.5 Using Foot Switch / Remote Device
The ZETA
®
7740 can also be actuated using a foot switch or by external devices. The
foot switch connection is made up of a 9 pin “D” connector. Making a dry-contact relay
closure across pins 1 and 9 can actuate the unit.
