UVP DE-4 - Manual

DE-4 EPROM Erasing System
Operating Instructions
Introduction
Ultraviolet Light
The invisible band of radiation just beyond he violet end of the visible spectrum is
called ultraviolet. In this band is a region called shortwave ultraviolet light, which
includes the wavelength that is instrumental in erasing EPROMs (254nm). The
intensity of this radiant energy or irradiance, as it is now called, at the location of
the EPROM is a function of the distance between the light source and the EPROM
and the geometry of the light. The design of this DE-4 EPROM Erasing System
optimizes all of these elements to give you the best possible performance.
Design
The DE-4 EPROM Erasing System is designed to provide a safe tool for exposure
of EPROMs to shortwave ultraviolet radiation. The unit incorporates a light-tight
captive drawer. Thus, the unit will not leak any hazardous UV radiation regard-
less of the drawer position.
Operating Instructions
This unit is built using a captive drawer feature. The lamp will operate, indepen-
dent of the drawer position, until the lamp is turned off.
WARNING: Do not operate continuously to avoid excess temperatures. Turn off
after each use cycle.
Eraser Operation
Plug your eraser into a standard AC outlet and pull out the drawer. Place the
EPROMs on the foam pad. For optimum erase times, use the layout formats of
Figure 1 for the number of EPROMs to be erased. Push the drawer closed until it
snaps. Use Table 1 to establish the erase time for the EPROMs in use. Depress the
red button on the upper portion of the eraser for three to five seconds, then release.
This will light the lamp. You can determine this by observing faint glow of light
through the plastic at the bottom of the lamp housing. If the lamp does not light
the fist time, depress the red button for an additional five seconds. After comple-
tion of the erase, turn off the lamp by depressing the black button.
off the drawer assembly and set it aside. Lift off the lamp housing to expose the
tube. Carefully grasp both ends and twist it approximately 1/4 turn until it works
free from the sockets. Insert the tube in the reverse fashion, being sure that it
snaps snugly in place with the 1/4 twist. Reassemble the unit in the reverse order.
Jammed Drawer
In the event an EPROM become lodged internally and cannot be removed, the unit
will have to be disassembled to retrieve the EPROM and free the drawer move-
ment. To do this and free the drawer, unplug the unit from the AC outlet. Place
the unit upside down on the bench. Push the drawer fully closed. Using a Phillips
head screwdriver, remove the two screws from the end opposite drawer. Then
remove the third screw at the end where the drawer handle is located. This is
accessible through the hole at the bottom of the EPROM Eraser. Carefully lift the
entire bottom assembly off of the lamp assembly and set it aside. Turn the ray
assembly over and observe the location of the EPROM. Readjust the EPROM so
it is not engaging any part of the drawer assembly and slide the drawer out. Re-
move the EPROMs from the foam pad.
Foam Pad Replacement
If the pad needs replacing, remove the drawer cover by sliding it off the lower
drawer fixture. This will free the drawer completely from the housing so that the
drawer can be removed and the foam pad removed and replaced. To reassemble the
unit, place the drawer back in the lower drawer housing and slide the cover back in
place. Place the drawer assembly back on top of the lamp housing and reinsert the
screws.
Repair/Technical Assistance
Contact UVP’s Customer Service at the offices below with any questions. A Re-
turned Goods Authorization (RGA) number must be obtain from UVP prior to re-
turning any products to UVP for repair.
Replacement Parts and Accessories
Product Part Number Complete Assembly
Replacement Tube 34-0003-01 DE-4 115V 95-0095-03
Foam Pad 72-0006-03 DE-4 230V 95-0095-02
UVX Radiometer 97-0015-01 DE-4 100V 95-0095-01
UVX-25 Sensor 97-0016-01
115V Ballast 42-0003-01
215-250 Ballast 42-0004-02
Corporate Headquarters: UVP, LLC, 2066 W. 11th Street, Upland, CA 91786 USA
Tel: (800)452-6788 or (909)946-3197 • Fax: (909)946-3597
European Office: Ultra-Violet Products Ltd. Unit 1, Trinity Hall Farm Estate, Nuffield
Rd., Cambridge CB4 1TG UK Tel: +44(0)1223-420022 • Fax: +44(0)1223-420561
Web Site: www.uvp.com
81-0071-01 Rev. F