NEC manual 19

2. Installation and Connections

Throw Distance and Screen Size

The following shows the proper relative positions of the projector and screen. Refer to the table to determine the position of installation.

Distance Chart

C

B = Vertical distance between lens center and screen center

C = Throw distance

α

Screen center

Lens center

D = Vertical distance between lens center and screen bottom (top of screen for ceiling application)

Bα = Throw angle

DNOTE: Distances may vary +/-5%.

Screen bottom

Projector bottom

VT695

		Screen Size					B				C					D			α
Diagonal		Width		Height					wide				tele					wide		tele
inch	mm	inch	mm	inch	mm	inch		mm	inch	mm	-	inch		mm	inch		mm	degree	-	degree
21	533	17	427	13	320	4		110	-	-	-	29		730	-2		-50	-	-	8.6
25	635	20	508	15	381	5		130	28	720	-	34		870	-2		-60	10.3	-	8.6
30	762	24	610	18	457	6		160	34	870	-	41		1050	-3		-70	10.2	-	8.5
40	1016	32	813	24	610	8		210	46	1170	-	56		1410	-4		-100	10.1	-	8.4
60	1524	48	1219	36	914	12		310	70	1770	-	84		2130	-6		-140	10.1	-	8.4
72	1829	58	1463	43	1097	15		380	84	2130	-	101		2560	-7		-170	10.0	-	8.4
80	2032	64	1626	48	1219	17		420	93	2370	-	112		2850	-8		-190	10.0	-	8.4
84	2134	67	1707	50	1280	17		440	98	2490	-	118		2990	-8		-200	10.0	-	8.4
90	2286	72	1829	54	1372	19		470	105	2670	-	126		3210	-8		-210	10.0	-	8.4
100	2540	80	2032	60	1524	21		520	117	2970	-	141		3570	-9		-240	10.0	-	8.3
120	3048	96	2438	72	1829	25		630	141	3570	-	169		4290	-11		-290	10.0	-	8.3
150	3810	120	3048	90	2286	31		790	176	4470	-	211		5370	-14		-360	10.0	-	8.3
180	4572	144	3658	108	2743	37		940	211	5370	-	254		6450	-17		-430	10.0	-	8.3
200	5080	160	4064	120	3048	41		1050	235	5970	-	282		7170	-19		-480	10.0	-	8.3
210	5334	168	4267	126	3200	43		1100	247	6270	-	296		7530	-20		-500	10.0	-	8.3
240	6096	192	4877	144	3658	50		1260	282	7170	-	339		8610	-23		-570	9.9	-	8.3
270	6858	216	5486	162	4115	56		1410	318	8070	-	381		9690	-25		-640	9.9	-	8.3
300	7620	240	6096	180	4572	62		1570	353	8970	-	424		10770	-28		-710	9.9	-	8.3

VT595/VT590/VT490/VT59

		Screen Size							B					C					D			α
Diagonal			Width			Height						wide				tele					wide		tele
inch	mm	inch		mm	inch		mm	inch		mm	inch		mm	-	inch		mm	inch		mm	degree	-	degree
21	533	17		427	13		320	4		110	-		-	-	30		750	-2		-50	-	-	8.6
25	635	20		508	15		381	5		140	29		740	-	35		900	-2		-60	10.3	-	8.5
30	762	24		610	18		457	6		160	35		900	-	43		1090	-3		-70	10.2	-	8.5
40	1016	32		813	24		610	9		220	48		1210	-	57		1460	-3		-90	10.1	-	8.4
60	1524	48		1219	36		914	13		320	72		1830	-	87		2200	-5		-130	10.1	-	8.4
72	1829	58		1463	43		1097	15		390	87		2200	-	104		2650	-6		-160	10.0	-	8.4
80	2032	64		1626	48		1219	17		430	96		2450	-	116		2940	-7		-180	10.0	-	8.4
84	2134	67		1707	50		1280	18		450	101		2570	-	122		3090	-7		-190	10.0	-	8.4
90	2286	72		1829	54		1372	19		490	109		2760	-	131		3310	-8		-200	10.0	-	8.4
100	2540	80		2032	60		1524	21		540	121		3070	-	145		3690	-9		-220	10.0	-	8.3
120	3048	96		2438	72		1829	26		650	145		3690	-	174		4430	-10		-270	10.0	-	8.3
150	3810	120		3048	90		2286	32		810	182		4620	-	218		5540	-13		-330	10.0	-	8.3
180	4572	144		3658	108		2743	38		970	218		5540	-	262		6660	-16		-400	10.0	-	8.3
200	5080	160		4064	120		3048	43		1080	243		6160	-	291		7400	-17		-440	10.0	-	8.3
210	5334	168		4267	126		3200	45		1140	255		6470	-	306		7770	-18		-460	10.0	-	8.3
240	6096	192		4877	144		3658	51		1300	291		7400	-	350		8890	-21		-530	9.9	-	8.3
270	6858	216		5486	162		4115	57		1460	328		8330	-	394		10000	-24		-600	9.9	-	8.3
300	7620	240		6096	180		4572	64		1620	365		9260	-	438		11120	-26		-660	9.9	-	8.3

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