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Edwards Manuals
Water Pump
nEXT240
Instruction manual
Edwards nEXT240 Instruction Manual
Turbomolecular pumps
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Instruction manual
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Instruction manual
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Contents
Table of Contents
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Table of Contents
Table of Contents
Introduction
Scope and Definitions
General Description
Pump Controller
Operational Features
Power Limit Setting
Standby Speed
Timer
Analogue Output
Automatic Vent Options
Normal Speed Setting
Logic Interface
Parallel Control and Monitoring
Serial Control and Monitoring
Serial Control with Parallel Monitoring
Parallel Control with Serial Monitoring or Serial Configuration
Controller Configuration (Serial Set-Up)
Technical Data
General
Pumping Media
Next240 Performance Curve
Next300 Performacne Curve
Next 240D Dimensions (MM)
Next 300D Dimensions (MM)
Next 400D Dimensions (MM)
Vent Gas Specification and Vent Control Data
Purge Gas Specification
Cooling Water
Materials Exposed to Gases Pumped
Electrical Data
Logic Interface Connector
Controller Connector Socket
Maximum Allowed Rate of Pressure Rise During Venting: Pressure against Time (with Pump Initially at Full Rotational Speed) 17 7 Controller Connector Showing Pin Numbers
Interface Circuits for Next Turbo Pump Controllers
Indicator Leds
Operating and Storage Environment
Installation
Unpack and Inspect
Typical Installation
Connection to the Vacuum System
Typical Pumping System with a Next Pump
Inlet-Screen (Supplied Fitted on CF Only)
Mechanical Fixing
Inlet-Connection and Orientation
Base Mounting
Backing Connection
Interstage Connection (Variants Only)
Purge Gas Connection
Connect the Purge Gas
Recommended Purge Gas Flow
Electrical Installation
Introduction
Earth (Ground) Connections
Connect the Logic Interface to the TIC
Connect the Logic Interface to Your Control Equipment
Connect the Electrical Supply
Connection for Parallel Control and Monitoring
Logic Interface Connections - Parallel Mode
Connection for Serial Control and Monitoring
Connect the Serial Interface to Your Control Equipment
Controller Status Information
Serial Enable
Serial Protocol
Message Structure
Command Set
Simultaneous Parallel and Serial Operation
Schematic Diagram of the Logic Interface Connections
Multi-Drop Operation
Vent Options, Vent Valve Connection and Control
Manual Vent Valve
TAV5 or TAV6 Solenoid Vent Valve
Controlled Venting
Alternative Valve Connected to the Vacuum System
Cooling
Introduction
Forced Air Cooling
Water-Cooling
Maximum Relative Humidity to Avoid Condensation with Water Cooling
Operation
Configuring the Next Pump Using Serial Commands
Power Limit Setting
Powering a Fan from the Controller
Controlled Venting Options
Standby Speed Setting
Normal Speed Setting
Timer Setting and Options
Analogue Signal Options
Factory Settings
Assigning a Multi-Drop Address
Configuring the Next Pump Using a TIC
Start-Up
Close the Vent Valve
Pre-Start Checks
Operation with Parallel Control and Monitoring
Start the Pump
Running at Standby Speed
Stop the Pump
Parallel Monitoring
Operation with Serial Control and Monitoring
Delayed Start
Start the Pump
Standby Speed
Stop the Pump
Temperature Readings
Link Parameter Readings
Measured Motor Speed
Simultaneous Parallel and Serial Operation
Operation with a TIC
Decelerating and Venting
Operation at Extreme Conditions
Operation with High Inlet Pressure
Operation at High Temperatures
Operation at Over-Speed
Electrical Supply Failure
Bakeout
Maintenance
Introduction
Bearing and Oil Cartidge Maintenance
Rotor Life
Clean the External Surfaces of the Pump
Fault Finding
Flashing Service Codes
Flashing Error Codes
Decoding System Status Words
Useful Service Information
Storage and Disposal
Storage
Disposal
Service, Spares and Accessories
Introduction
Service
Returning a Pump for Service
Bearing and Oil Cartridge On-Site Maintenance
Spares
ISX Inlet-Screen
Inlet-Strainer
Inlet-Flange Seals and Integrated Inlet Screens
Accessories
Installation
ACX Air-Cooler
WCX Water-Cooler
BX Bakeout Band
TAV Vent-Valve and Vent-Port Adaptor
VRX Vent-Restrictor
Vent-Port Adaptor
PRX Purge-Restrictor
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General Description
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Pump Controller
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Description
nEXT240D
nEXT240T
nEXT300D
nEXT300T
nEXT400D
nEXT400T
Instruction Manual
nEXT Turbomolecular Pumps
nEXT240, nEXT300 and nEXT400
B800-00-880
Issue A Original
Item Number
B812XXXXX
B813XXXXX
B822XXXXX
B823XXXXX
B832XXXXX
B833XXXXX
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This manual is also suitable for:
Next300
Next400
Next400d
Next300t
Next300d
Next400t
...
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Next240d
Next240t
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