Ametek ORTEC MOBIUS-B, Руководство пользователя, Страница: 20 / 28

PROPERTY OF AMETEK, INC. – ORTEC ®
ORTEC
® MÖBIUS™ Recycler HPGe Detector Cooling System
805709F / 1115
14
dangerously out of the fill collar as the cryostat is removed. Redundant relief valves on the MÖBIUS fill collar
reduce this risk, but it is always best to eliminate the risk by first opening the fill and vent lines.
CAUTION
●
The detector electronics must be protected from excessive cold . Avoid spilling LN2 on the cryostat or
electronics, and vent cold gas away from the system being filled. A cold detector must not be enclosed in any
thermally insulating materials at any time . Following these precautions will prevent damage to the vacuum
seals or system electronics from excessive chilling.
●
Never attempt to fill the MÖBIUS by manually pouring LN2 through the fill collar. Always install the detector
before filling, and use a fill dewar . The recommended filling procedure described in Section 3.2 presents
minimal risk to the unit and users.
3.3.2. Other Precautions
3.3.2.1. H
ANDLING
P
OP
T
OP
D
ETECTOR
/C
RYOSTAT
A
SSEMBLIES
●
Grasp the assembly just beneath the base of the detector capsule, where the cable exits the base plate; or by
the preamplifier shroud (see Figure 12).
Do not touch any cryogenically cooled surfaces (if moving a cryostat
that is already cold), and do not hold the detector by the endcap!
Figure 12. Where To Hold a PopTop.
●
If the detector is cold, at the same time you lift or lower the assembly, turn it slightly clockwise (as viewed
from above the endcap; i.e., turn it in the direction that tightens the PopTop capsule to the cryostat).
Applying counterclockwise force to a cold detector will rupture the capsule’s vacuum seal, and the unit
must be returned to ORTEC for repair.
3.3.2.2. E
LECTRICAL
C
AUTIONS
●
Ensure the unit is fused for the proper voltage — 250 V/10 A time-delay fuses for 120 V ac systems and
250 V/5 A time-delay fuses for 220 V ac systems — before connecting the power cord to ac mains power.
Replace blown fuses with the same model and performance specifications. Never short circuit a blown fuse.
●
Always disconnect the power cord from the MÖBIUS before performing any maintenance.