Leica Biosystems CM1950 - Manual (Page 25)

25 Leica CM1950 – Cryostat
To lock the handwheel, move its handle to the 12 or 6 o'clock position. Press
the lever (1) fully outward; gently rock the handwheel back and forth until
the locking mechanism clicks into place noticeably.
To release the handwheel, press the lever (2) on the handwheel toward the
cryostat housing.
12 o'clock
position
6 o'clock
position
1
2
6.3.2 Installing the footswitch dummy (instruments with cutting motor)
• The footswitch dummy must be installed on the outer right side of the
instrument ( see Chap. 5 "General Overview" ) if no footswitch (optional)
is used.
If the red LED in the E-STOP field in control panel field 3 is illuminated, either:
• emergency-stop function active, or
• Footswitch dummy (opt. foot switch) not connected or incorrectly
connected. Fig. 18
To do so, pull out the handwheel's handle and position it in the middle of the
handwheel. The handle automatically engages in this position.
Centering the Handwheel (Optional)
6. Installation
Rotate the handwheel only if the refrigeration system is on and the
cryochamber is cold.
6.3.1 Locking/unlocking the handwheel
Always lock the handwheel prior to making modifications to the
knife or specimen, changing the specimen, or taking a break!
An important safety device on the cryostat is the feature for center-
ing the handwheel in motorized sectioning mode.
Fig. 15
Fig. 16
Fig. 17