Adjustment / Calibration
Humphrey Field Analyzer II - i
Confidential and Proprietary
Field Service Guide
4 - 20
52235C1105
4.8.3
Intensity
4.8.3.1
Projector
4.8.3.1.1
White
Purpose
This procedure ensures that the maximum brightness of the projected number V spot in the
bowl is close to the optimum 929 Ft-L while the voltage across the projection lamp is less
than 10 volts.
Special Tools/Equipment Required
P
Soligor Light Meter Kit
P
Digital Multimeter, Fluke 8060A or equivalent
P
Bowl Shroud
P
Small Flashlight
Prerequisites
Before performing white projector intensity calibration, verify the following:
P
Projection lamp filament voltage with lamp on. If voltage is over 10 volts, replace
lamp.
P
Projector Adjustment (Section 4.8.2.1)
P
Shutter Calibration (Section 4.8.2.2)
P
Aperture Calibration (Section 4.8.2.3)
P
Color Wheel Calibration (Section 4.8.2.4)
P
Focus Calibration (Section 4.8.2.7)
NOTE:
The Wedge Calibration (
Section
4.8.3.3) MUST be performed following any
changes to the White Projector Intensity Calibration.
Procedure
1)
Set up the Soligor light meter on the
HFA II - i
and zero out the meter (Appendix A).
2)
Set the light meter to
position 1.
3)
From the Main Calibration menu, select
INTENSITY.
4)
Set up the instrument as follows to calculate the foot-lamberts:
a)
From the Intensity Menu, select P Factors (See Appendix A.2.19) or selectP1, P2
and P3 enter the P1, P2 and P3 factors from your Soligor Meter. Select
P3B,
P3Y
and
P3F
if your light meter has these factors, otherwise enter the BYP3
factor on your meter for P3B and enter the P3 factor for P3Y and P3F.
b)
Select
METER
and enter your light meter serial number.
Содержание humphrey HFA II-i series
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