~sober/manuals/tag_camera.txt
						9 July 1998


	Tagger Beam Dump Camera and Illumination (NEW:  9 July 1998)

	The Tagger Beam Dump video signal now comes from a Panasonic WV-BP330
	camera (the standard lab surveillance camera) fitted with a
	500 mm f/8 mirror lens, which was installed on 9 July 1998.
        The camera is positioned on the end of a hollow steel rod 
	inserted through the 6-inch-diameter pipe which passes through 
	the 5-foot-thick sand-filled beam dump plug, and views the
	BeO viewscreen from a distance of approximately 20 ft. 
	The signal cable runs overhead from the tagger dump to the back of 
	Tagger Rack 1, where it is patched to the Counting Room via        
	cable number 27 in the bundle of old video cables.

	Power for the camera (120 V AC) is provided through an orange
	power cable which is plugged into the power strip on the back
	of Tagger Rack 1.

	The light fixture which illuminates the viewscreen is an ordinary
	trouble light which has been lowered into the dump through
	the same hole in the beam dump plug.  This light cannot
	be removed for bulb replacement without removing and repositioning
	the camera.  When the bulb fails, an alternative light fixture
	exists (a small-diameter floodlight bulb at the end of a 
	long piece of conduit), which we hope can be inserted without
	disturbing the alignment of the camera.

	The power cord for the lamp is controlled by a lamp dimmer
	which is plugged into the rear power strip of Tagger Rack 1 (near
	the bottom of the power strip.) The best illumination is obtained
	at approximately 90% full brightness, as marked on the touch
	strip.  Please do not set to 100%, so as to prolong bulb life.
	


	>OBSOLETE:  The text below refers to the original camera,
	>which burned out on 1 July 1998.
	>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
	>The Tagger Beam Dump video signal comes from the camera power
	>chassis which is located in the bottom rear of Tagger Rack 2.
	>The cable in the Counting Room is number 27 in the bundle of old
	>video cables.

	>The light fixture which illuminates the viewscreen is attached to
	>an arm inserted through the vent hole in the beam dump plug,
	>and can be removed for bulb replacement.  The original burned-out
	>bulb was replaced on 26 July 1997 by a 100W halogen bulb (standard
	>screw base.)

	>The power cord for this lamp is now controlled by a lamp dimmer
	>which is plugged into the rear power strip of Tagger Rack 1 (near
	>the bottom of the power strip.) The best illumination is obtained
	>at approximately 1/4 of the way from the "Dim" end of the "Bright-
	>Dim" touch strip on the dimmer, as indicated by the marked arrow.