Potec PACP-6100, Руководство оператора

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-------------------------------------------------------------------- PACP-6100 Operator’s Manual
17
6.2 How to obtain correct Letter Size and focus (Zooming Type
only)
1. Install chart projector at desired position of 2.5~8m (8~26 feet)
2.
Measure the distance from patient to screen
3. Refer to the test scale shown in the Appendix A
4. Have someone hold the test scale at the screen
5. Project the 20/400(6/120, 0.05) alphabet “C”
6. Adjust the position of the projector forward or backward and turn the focusing
wheel until “C” is brought in sharp focus within the respective distance scale