Ametek ORTEC MOBIUS-B, User Manual, Page: 12 / 28

PROPERTY OF AMETEK, INC. – ORTEC ®
ORTEC
® MÖBIUS™ Recycler HPGe Detector Cooling System
805709F / 1115
6
Figure 5. Top Plug for MÖBIUS-B Models Only.
2.3. PREPARING THE MÖBIUS FOR USE
1) Unpack the dewar and make sure the dewar and vent/fill valve tube stems are empty of any packing material.
2) As shipped from the factory, the cryogenic cooler is protected from damage by a foam block inserted under
the black cooler cover beside the fill collar (Figure 6). This foam must be removed before using the MÖBIUS.

Using a #1 Phillips screwdriver, remove the screws from the cooler cover and set them aside.

Lift off the cooler cover, then remove the caution tag.

Remove the foam block and keep it with along with all other shipping materials for transporting the
MÖBIUS, returning it to the factory for service, etc.

Replace the cover and tighten the screws just enough that they will not vibrate loose. Do not over-
tighten . This seal is intended as an air dam, not a pressure seal, so tighten the screws just enough to
establish uniform, snug contact with the gasket.
3) Next, the fuses must be installed. As shipped, the fuse block and fuses are packaged in zippered plastic bags
so you can select the proper fuse for the ac mains power at your site. Use the 250 V/10 A time-delay fuses for
120 V ac/60 Hz operation and the 250 V/5 A time-delay fuses for 220 V ac/50 Hz operation. Install the fuses in
the block, turn the block until the key tab faces down (Figure 7), and push it into the power entry module
until both sides snap positively into place (Figure 8).
CAUTION When the foam block is not in place under the cooler cover, keep the MÖBIUS upright
or the cooler may be damaged. See also Section 4.3.
Do not operate the MÖBIUS without the cover installed; it is required for proper air flow
to the cooler.