Rate this post by selecting a number. 1 is the worst and 5 is the best.

Author Message   Glenn Tinkerer Username: Glenn Post Number: 1002 Registered: 07-2006 Rating: N/A Votes: 0 Posted on Thursday, May 24, 2012 - 11:02 am:    No, you will find that the moon/sun disc is infact an anodised alloy disc that is glued into a recess in the center screw head. If you place a very fine needle (I use a fine hypodermic needle) between the plated upstanding edge of the screwhead and the outer edge of the disc, you will find that you can gently lift the disc out. One should note that the dab of contact adhesive holding the disc is almost never placed in the disc center -this means that if the disc is difficult to raise when you first place the needle in the narrow gap, move needle to opposite side of disc and try again. Almost always you will be able to raise the edge of the disc enough so that you can place a thin knife blade between disc and screwhead, allowing the disc to be carefully pried free. As I have said before, Gossen will provide new discs and alloy rear data plates (ie the bits that may get bent when a meter is serviced) for a nominal handling charge for black cased models. From memory the same alloy 'moon' disc was/is used on both grey and black cased instruments.