User's Manual Rev B / February 2021 / M125 Helium Compressor
97-00020-000
2
Table 2-1: Compatible Configurations
Compressor Drive Circuit Configuration
RC
Cold Heads
350CS
CTI 350 CP
Cryopumps
Cryo-Plex 8
Cryo-Plex 8LP
CT-8
CT-8F
OB-8
OB-8F
3
Safety Warnings
3.1
Standards for the Use of Warnings and Cautions
Warnings are noted when there is a possibility of injury or death to persons operating the equipment or performing specific
tasks or procedures noted in this manual. Cautions are noted when there is a possibility of damage to equipment if the
caution is ignored.
3.2
Warnings Applicable to All Aspects of M125 Operation
3.2.1
High Voltage and Electrical Shock Warnings
Potentially fatal voltages are present in the compressor unit. Before beginning any work on the
compressor unit, the compressor needs to be switched off then isolated from the power supply.
Connect or disconnect the flex lines joining the compressor and its load (cryopump, cold head, etc.)
only after the compressor and its load are switched off and separated from the power source.
Otherwise, electrical shock hazards may exist, potentially causing damage to the compressor unit, its
load, or the operator.
Always provide proper grounding to the compressor unit and its load. All electrical power connection
and disconnection of the unit should be done by a qualified electrician.
High voltage is present within the compressor unit and can cause severe injury from electrical shock.
Permit only qualified electrical technicians to open the compressor enclosure to perform electrical
troubleshooting.
Disconnect the compressor from its power source before carrying out any troubleshooting or
maintenance activities.
