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MKS 946 Series User Manual

MKS 946 Series
130 pages
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Series 946 Vacuum System Controller
Operation and Maintenance Manual
Instruction Manual p/n: 100018121
Rev A, June 2020

Table of Contents

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MKS 946 Series Specifications

General IconGeneral
BrandMKS
Model946 Series
CategoryController
LanguageEnglish

Summary

1 Safety Information

1.1 Symbols Used in this Manual and their definitions

Defines symbols used in the manual for safety and operational guidance.

1.2 Safety Precautions

Outlines general safety precautions for all phases of instrument operation.

2 Specifications

2.1 Controller

Details the electrical and physical specifications for the controller unit.

2.2 Pressure, Flow Sensors, & Valves

Lists specifications for various pressure and flow sensors and compatible valves.

2.3 Controller Display

Describes the display characteristics and capabilities of the controller's interface.

3 Feature, Control Locations and Dimensions

4 Typical Applications for the Series 946 Controller

5 MKS Series 946 Vacuum System Controller

6 Operating the Series 946 Controller

6.1 Power

Details how to power the controller on and off.

6.2 Front Panel Control Lock

Describes how to lock and unlock the front panel controls for security.

6.3 Front Panel Display

Explains the front panel display interface and its functions.

6.4 System Setup

Details how to configure system parameters like units, communication, and recipes.

6.5 Channel Setup for Pressure Measurement

Guides through setting up parameters for individual pressure sensors.

6.6 Power Control of a Pressure Sensor

Describes how to control sensor power and degas functions.

6.7 Channel Setup for Flow Measurement and MFC Based Pressure Control

Covers setting up flow measurement and MFC-based pressure control.

6.8 Pressure Control using a Control Valve

Details how to control system pressure using upstream or downstream valves.

7 Installing Vacuum Sensors

7.1 Installing Cold Cathode Sensors

Guides the installation of Cold Cathode sensors, including connections.

7.2 Installing Hot Cathode Sensors

Details the installation of Hot Cathode sensors and related precautions.

7.3 Installing Convection Pirani, Convectron, or Pirani Sensors

Guides the installation of Pirani, Convectron, and Convection Pirani sensors.

7.4 Installing Capacitance Manometers - MKS Baratron

Guides the installation of MKS Baratron Capacitance Manometers.

7.5 Series 902B Piezo

Covers installation of Series 902B Piezo resistive gauges.

7.6 Installing Mass Flow Controllers

Guides the installation of Mass Flow Controllers (MFCs).

7.7 Installing a Pressure Control Valve

Guides the installation of pressure control valves for system pressure control.

8 Connecting Relay and Analog Outputs

8.1 Connecting 946 Relay Outputs

Details how to connect the 946's relay outputs for system control.

8.2 Connecting the 946 Analog Output

Guides connecting the 946's analog output signals for data acquisition.

8.3 Buffered Analog Output

Explains the buffered analog output signals from sensors.

8.4 Logarithmic/Linear and Combination Analog Output

Details logarithmic, linear, and combination analog outputs.

9 RS232/485 Serial Communication Commands

9.1 Serial Communication Wiring Diagram

Illustrates the wiring diagram for serial communication.

9.2 Communication Protocols

Details communication protocols, baud rates, and character formats.

9.3 Pressure Reading Commands

Lists commands for reading pressure values from sensors.

9.4 Relay and Control Setting Commands

Covers commands for setting relay and control parameters.

9.5 Capacitance Manometer Control Commands

Lists serial commands for controlling Capacitance Manometers.

9.6 Convection Pirani, Convectron and Pirani Control Commands

Lists serial commands for Pirani, Convectron, and Convection Pirani sensors.

9.7 Cold Cathode Control Commands

Lists serial commands for controlling Cold Cathode sensors.

9.8 Hot Cathode Control Commands

Lists serial commands for controlling Hot Cathode sensors.

9.9 MFC Control Commands

Lists serial commands for controlling Mass Flow Controllers (MFCs).

9.10 Pressure (Valve) Control Commands

Lists serial commands for controlling pressure via valves.

9.11 PID Recipe Setting Commands

Lists serial commands for setting PID control recipes.

9.12 Ratio Recipe Setting Commands

Lists serial commands for setting ratio control recipes.

9.13 PID/Ratio Control Activation Command

Lists commands for activating PID and Ratio control.

9.14 System Commands

Lists serial commands for system-level configuration and status.

9.15 Error Codes

Lists and explains error codes returned by serial commands.

10 Maintenance of Series 946 Controller Modules

10.1 Removing and Installing a Sensor Module

Guides on removing and installing sensor modules.

10.2 Removing and Installing AIO Module

Details removing and installing the AIO module.

10.3 Pressure Control (PC) Module

Covers removing and installing the Pressure Control (PC) module.

10.4 Mounting the 946 Controller

Explains how to mount the controller in racks or on a benchtop.

10.5 AC Power Cord

Provides information on the AC power cord and its proper use.

11 Maintenance and Service of MKS Vacuum Sensors

11.1 422 and 431 Cold Cathode Sensor

Details maintenance for 422 and 431 Cold Cathode sensors.

11.2 Maintenance of Series 423 I-Mag Cold Cathode Sensor

Details maintenance for the 423 I-Mag Cold Cathode sensor.

11.3 Maintenance of Low Power Nude and Mini BA Hot Cathode Sensors

Details maintenance for Hot Cathode sensors.

11.4 Maintenance of a Pirani Sensor

Details maintenance procedures for Pirani sensors.

11.5 Maintenance of a Capacitance Manometer

Details maintenance procedures for Capacitance Manometers.

12 Spare Parts and Accessories

13 Appendix

13.1 MFC Gas Conversion Factors for Selected Gases

Provides conversion factors for various gases used with MFCs.

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