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First and foremost, an user manual of Keystone 1157 should contain:
- informations concerning technical data of Keystone 1157
- name of the manufacturer and a year of construction of the Keystone 1157 item
- rules of operation, control and maintenance of the Keystone 1157 item
- safety signs and mark certificates which confirm compatibility with appropriate standards
Why don't we read the manuals?
Usually it results from the lack of time and certainty about functionalities of purchased items. Unfortunately, networking and start-up of Keystone 1157 alone are not enough. An instruction contains a number of clues concerning respective functionalities, safety rules, maintenance methods (what means should be used), eventual defects of Keystone 1157, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the Keystone service. Lately animated manuals and instructional videos are quite popular among customers. These kinds of user manuals are effective; they assure that a customer will familiarize himself with the whole material, and won't skip complicated, technical information of Keystone 1157.
Why one should read the manuals?
It is mostly in the manuals where we will find the details concerning construction and possibility of the Keystone 1157 item, and its use of respective accessory, as well as information concerning all the functions and facilities.
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Table of contents for the manual
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Page 1
V ision Screening with the DVS-V Model 1 157 PUBLICATION NO. 5920 Instr uction Manual KEY STONE VIEW DIVISION OF MAST/KEYST ONE[...]
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Content s The DVS-V Test Instrument. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 DVS-V Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 The Elliptech Hand Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [...]
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Page 3
The Keystone DVS-V Vision Screener represents the fift h gen- eration of electro/mechanical vision test instrum ents. All func- tions are under pus h button con- trol… for unparalleled ease and reliability of operation. Com - pletely self contained, the unit operates from standar d 110-120 volt AC pow er. It’s light in weight, unusually compact[...]
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Page 4
Under normal co nditions of use, the DVS-V will require little maintenance i f it is protected by a dust cover when not i n use. Virtually no repa ir or adjustment will be neede d, since all operat- ing com ponent are prote cted and solid-state circuitry assures ex- ceptionally h igh reliabi lity. Cleaning Periodically, som e cleaning will be neces[...]
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Page 5
E A C B D F Elliptech Control Unit The newly de signed DVS-V Elliptech S oft-Touch hand control unit makes for eas y operations of the vision screener. By pressing the appropriate but tons on this compact panel, th e stereo tests can be advanced or re- versed, the subject’s ey es occluded, and the peripheral visi on test lam ps selectively lit. T[...]
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T e st Guide Subject to wear any glasses normally used when driving. Test #1: Quick Acuity Nine separate blocks containing three digits of 20/ 40 acuity letters each. The first column tests both ey es, the second tests ri ght eye acuity , and the third test left eye acuity. All three lines sh ould be read, and only as many as two digits i n each co[...]
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T e st Questions and Referral Guide Notes: All tests are given with both eyes open at all times. Subject to wear any glasses norm ally used for driving. Test #1 Quick Acuity at 20/40 Level Ask your subject: “ Do you see three columns with nu m bers?” “Look at the first column, starting from top to bottom , please read the di gits to me.” ?[...]
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Test #3 & #4 Depth Perception & Sign Recognition Ask the subject: “Pleas e identify all six road signs. What do they mean? ” “Do any appear closer to you than the othe rs? ” “Which on e?” “Do an y appear furt her away from yo u?” “Which? ” Actual Test Actual Test DEPTH / SIGNS 1. STOP (NEAR) 4. ROAD CLOSED 2. MERGE 5. HA[...]
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Test #5 Binocular Acuity Actual Test A B C 1. 20 = 857432 25 = 674235 30 = 382457 2. 40 = 563472 50 = 859423 60 = 8927 3. 70 = 2978 100 = 43 200 = 9 A B C 1. 20 = 547638 25 = 428576 30 = 943852 2. 40 = 795823 50 = 357248 60 = 7236 3. 70 = 9574 100 = 92 200 = 5 Note: Double Check the day /nite switch for desired position. Ask your subject to read th[...]
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Actual Test A B C 1. 20 = 745932 25 = 578236 30 = 346752 2. 40 = 534268 50 = 752386 60 = 6254 3. 70 = 8453 100 = 85 200 = 3 Proceed as on test #5 and #6. To pass the acuity t est, at least five of six charac ters must be read in Blocks A, Li ne 2 on each of t h e tests 5,6, and 7. This is a standard of 20/40 for each eye separa tel y, and both ey e[...]
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Horizontal Field Testing This test shows a subject' s range of vision to each side when he/s he looks straight ahead. Having the su bject direct his/her atte ntion to a far-point stereo target and then lig hting the periph eral target lamps at random. The stereo target used should be a s imple binocular target. Tell the subje ct to continue lo[...]
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2200 Dickerson Road, Reno NV 89503 Phone: (775) 324-2799 (800) 806-6569 Fax: (775) 324-5375 Email: saIes@keystoneview .com[...]