
Electron Microscopy Sciences
P.O. Box 550
1560 Industry Road Hatfield, PA 19440
TOLL FREE: 1-800-523-5874
TEL: 215-412-8400 WEB: www.emsdiasum.com
Battery replacement
The DFP™ uses four (4) C cell alkaline batteries. On a single set of batteries, you should have several
hours of run time. When the light grows dim and no fluorescence can be seen, replace the batteries.
To replace the batteries:
1. Unscrew the front bezel.
2. Remove the lamp assembly.
3. Remove the old batteries.
4. Insert the new batteries.
When inserting the batteries, make sure
that the battery contact base is in the proper orientation in the housing. The contacts must be facing up,
with the support springs down. Molded into the contact base is “ALIGN HERE”.
5. Insert with the arrow pointing toward the side of the housing the “ALIGN HERE” sticker.
The lamp will not operate if the contact base and batteries are inserted incorrectly.
The DFP™ is shipped with the batteries for you to insert. Whenever packing the light for shipment, we
recommend removing the batteries.
Lamp assembly replacement
1. Line up the slot at the top with the projections in the housing.
2. Line up the switch opening and the switch actuator.
3. Screw the front bezel down all the way.
Troubleshooting
In the case that the light completely fails to operate:
1. Insert a new set of batteries.
2. Check that the battery contact base is in the correct orientation.
3. If the above steps do not resolve the problem, contact us.
4. If return for repair is needed, contact Electron Microscopy Sciences. You will receive a Return
Authorization number.