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Humphrey Field Analyzer II - i
Adjustment / Calibration
Confidential and Proprietary
52235C1105
4 - 9
Field Service Guide
2)
Set the light meter to
position 1
.
3)
From the Main Calibration menu, select
VERIFICATION
, then
INTENSITY/SPOT
RATIO
.
4)
Select either
BEFORE
or
AFTER
, as appropriate.
NOTE:
The Mfg and QA selections are for manufacturing use only. Selecting either of
these two buttons will set tolerance values which are much tighter than those required for
field service evaluation.
5)
Set up the instrument as follows to calculate the foot-lamberts for you:
a)
Select P1, P2 and P3, and 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.
NOTE:
The Auto Verify and Spot Ratio selections are only used in manufacturing. The
Read P Factors use is described in Appendix A 2.19.
White Spot Intensity Verification:
6)
Select
WHITE
, then
#31/0dB
. A ten-key pad appears on the screen.
NOTE:
Allow the projection lamp to remain lit for at least 3 minutes before proceeding to
the next step.
7)
Position the light meter roughly on the projected spot, then maximize the reading by
positioning the chinrest via the chinrest control switch. (First left/right, then up/down,
then refine with left/right again. If you subsequently move the light meter accidently,
repeat this step in order to remaximize the meter reading.)
8)
Enter the voltage reading via the ten-key pad and select [Enter]. The calculated foot-
lamberts will be displayed next to #31/0dB. Also displayed is the tolerance for each
reading. If an asterisk (*) appears, this indicates a reading that is out of tolerance.
9)
Select
#32/4dB
and enter the voltage reading via the ten-key pad. Repeat the same
procedure for selection #33/9dB.
10) Switch to meter
position 2
on the light meter and repeat the procedure for selection
#34/14dB and then #35/19dB.
11) Switch to meter
position 3
on the light meter and repeat the procedure for
selections #36/24dB, #37/29dB, and #38/34dB. (#39 is not used at this time.)
Summary of Contents for humphrey HFA II-i series
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