PR-680/680L User Manual
35
P
ROCEDURE
-
LED
A
DAPTER
C
AP
R
EPLACEMENT
If it becomes desirable to switch LED Adapter caps supplied with the
LR-55
, proceed as follows:
1.
Loosen and remove the two SAE 4-40 hex cap screws that secure the LED Adapter cap to the
main tube.
2.
Remove the LED Adapter cap.
3.
Insert the new adapter cap making sure to align the threaded holes in the adapter with the
through holes in the tube.
4.
Replace and tighten the screws.
DO NOT OVER TIGHTEN THE SCREWS!!
M
AKING
M
EASUREMENTS
1.
Remove the MS-75 lens or other accessory by turning counter clockwise.
2.
Install the
LR-55
by threading it clockwise into the PR-680/680L lens mount.
Do not over
tighten.
3.
From the
Instrument Setup
menu, select
LR-55
from the Primary Accessory window by touching
the
▲
▼
icons in the Primary Accessory window.
4.
Insert the LED into the adapter port and allow at least a 5 minute warm-up (unless otherwise
specified).
5.
Make sure the LED is properly seated in the adapter.
6.
Touch the
MEASURE button
to begin a measurement.
U
SING THE
LR-127
O
VERVIEW
The LR-127 is designed to characterize discrete LEDs per the CIE 127 Technical Report
–
Measurement of
LEDs.
It satisfies the report’s requirement of average luminous intensity by providing both Condition A
(2°) and Condition B (6.5°) measurement capabilities. This is achieved by actuating a slide from the
A
position to the
B
setting. There is no need to remove the LED from the fixture during the test insuring
the accurate determination of average luminous intensity.
FIGURE 78 - LR-127
I
NSTALLING THE
LR-127
1.
Remove the current optical accessory from the PR-680/680L by turning counter-clockwise.
2.
Remove the lens mount (Instrument Side
–
see Figure 78) by loosening the thumb screw that
secures the mount to the main section of the LR-127.
3.
Screw the lens mount into the PR-655 lens ring.
DO NOT OVERTIGHTEN
the mount.
4.
Slide the main section of the LR-127 onto the lens mount.
5.
Rotate the main section until the slide is approximately horizontal and tighten the thumb screw.
I
NSERTING THE
LED
Instrument Side
LED Side
A / B Slide