OHAUS MB120 Service Manual page 52

5. Use both fore fingers to spread the clamping spring to the left and right and at the
same time use both thumbs to lift the Halogen lamp carefully upward out of the
clamping springs.
6. Remove and replace a defective halogen lamp.
Note:
The two ends of the Halogen lamp must not be bent toward or away from each other;
otherwise, the glass tube will break
Typical lift span of a halogen lamp is approximately 5000 heating hours.
MB90 MB120 Series Service Manual
CHAPTER 3 – MAINTENANCE PROCEDURES
46 Ohaus Corporation www.ohaus.com