Zeiss humphrey HFA II-i series, Руководство по обслуживанию на месте

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Adjustment / Calibration Humphrey Field Analyzer II - i
Confidential and Proprietary
Field Service Guide
4 - 8 52235C1105
If the service call requires both Before and After verification of the light intensities, a
Calibration Shift Worksheet must be completed to determine the difference or ‘shift’ in
light intensity. Refer to Appendix I, Service Forms.
Preparation:
Depending on the instrument model, perform the preparation steps for models 740 i /
750 i or for model 720 i . (The model 720 i does not offer the foveal threshold test; to
acquire values surrounding the foveal area a 10-2 SITA test must be run.) These two
tests provide a quick reference for determining an instrument’s light intensity quality.
For Models 740 i – 750 i
1) Select a threshold patient test and turn on foveal threshold. Start the test, obtain your
foveal threshold value, pause the test, and then select the Print icon. Your foveal value
will be printed out. Label this printout either Before or After (as required). Save this
printout, as you will return it with your instrument repair paperwork.
For Model 720 i (This test will take approximately three minutes to run.)
NOTE: You can print partial after Primary prints.
2) Select the
10-2 test
from the main menu (or go into
Show Test Library
, select
Threshold
, then
10-2
).
3) In the Patient Data screen, enter
your birth date
, then select
Proceed
.
4) When the 10-2 test comes up, select
Change Parameters
, set Test Strategy to
Sita-Fast , and then press Selection Complete.
5) Start the test. With patient response button in hand, position yourself on the chin rest.
With both eyes open and fixating on the yellow target, complete the test.
6) The test will take about 2 to 3 minutes to complete. When finished, you will hear two
beeps and the test results will be displayed.
7) Select the PrintIcon and print the results, but do not save them to disk.
8) The four dB numbers nearest fixation (center of field) should be the highest values.
Compare these numbers as you would with the Foveal Threshold values you receive
on Models 740
i – 750 i . Label this printout either Before or After (as required). Save
this printout, as you will return it with your instrument repair paperwork.
Setup: (for all HFA II - i models)
1) Set up the Soligor light meter on the HFA II - i and zero out the meter (Appendix A).
(For the Before Service readings, leave all covers on and cover instrument with bowl
shroud.)