![background image](http://html1.mh-extra.com/html/omega/dpf20-series/dpf20-series_user-manual_4064940036.webp)
36
DPF20 Frequency, rate, total or period counter
Instruction Manual
3.
How to open and close
3.1
How to open the housing
Locate the 4 clips (A B C D). Clips are covered by the front filter.
Clips can be seen when looking from the rear of the instrument, just below the front filter.
A.1
A
C
B
D
A
A.3
B
C
A
A.2
D
B
A. Locate the clips
Repeat for remaining 3 clips. All 4 clips are now unclipped.
Front filter is slightly moved to the front on each corner. It can now be removed by hand.
C.1
C.2
Unclipped
Unclipped
C.3
D
B
C
A
C. Repeat with all clips
Place a flat screw driver at the first clip. Insert firmly until the end of the clip space, and then turn gently the screwdriver clockwise approx.
45º (while still pushing against the clip). The front filter will ‘move up’ and unclip itself. Clip is unclipped when the front filter corner moves
slightly to the front.
B. How to unclip one clip
B.1
B
A
B.2
B
A
B.3
B
Screw driver placed
Screw driver turned
B
Unclipped
Clipped