Table of Contents
Subscribe to Our Youtube Channel
Related Manuals for MKS 41A
Summary of Contents for MKS 41A
- Page 1 119895-P1 Rev B, 3/98 Instruction Manual MKS Type 41A, 42A, 51A, and 52A Mini Vacuum Pressure Switch Six Shattuck Road Fax: (978) 975-0093 Andover, MA 01810-2449 E-mail: mks@mksinst.com (800) 227-8766 or (978) 975-2350 Web site: http://www.mksinst.com...
- Page 2 For the period commencing with the date of shipment of this equipment and ending two years later, MKS will, at its option, either repair or replace any part which is defective in materials or workmanship or with respect to the date-related operations warranty without charge to the purchaser.
- Page 3 119895-P1 Rev B, 3/98 MKS Type 41A, 42A, 51A, and 52A Mini Vacuum Pressure Switch...
- Page 4 All rights reserved. No part of this work may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or by any information storage or retrieval system, except as may be expressly permitted in writing by MKS Instruments, Inc.
-
Page 5: Table Of Contents
Table of Contents Table of Contents Safety Information........................1 Symbols Used in This Instruction Manual..............1 Symbols Found on the Unit ..................2 Safety Procedures and Precautions ................3 Chapter One: General Information..................5 Introduction ....................... 5 How This Manual is Organized.................. 6 Customer Support ...................... - Page 6 Table of Contents Serial Number Label ..................17 Trip Point Label.....................18 Sensor ........................18 Trip Point Value......................19 How The Full Scale Range Affects Trip Point Accuracy ........19 Method of Operation ....................20 Units Set to Energize Above the Trip Point Pressure ........20 Units Set to Energize Below the Trip Point Pressure ........21 Hysteresis ......................21 How A Gage Switch Works..................22 Reverse Calibration Switch................22...
- Page 7 List of Figures and Tables List of Figures and Tables Figures Figure 1: Dimensions of High Pressure Single-Ended Units ..........8 Figure 2: Dimensions of Low Pressure Single-Ended Units ........... 9 Figure 3: Dimensions of Flow-Through Units ............... 10 Figure 4: Components of a Cable to Connect to a Type “D” Connector ......... 15 Figure 5: Expanded View of the Cable ..................
- Page 8 List of Figures and Tables...
-
Page 9: Safety Information
Safety Information Safety Information Symbols Used in This Instruction Manual Definitions of WARNING, CAUTION, and NOTE messages used throughout the manual. Warning The WARNING sign denotes a hazard. It calls attention to a procedure, practice, condition, or the like, which, if not correctly performed or adhered to, could result in injury to personnel. -
Page 10: Symbols Found On The Unit
Safety Information Symbols Found on the Unit The following table describes symbols that may be found on the unit. Definition of Symbols Found on the Unit Protective earth (ground) Off (Supply) Earth (ground) On (Supply) IEC 417, No.5019 IEC 417, No.5017 IEC 417, No.5008 IEC 417, No.5007 Frame or chassis... -
Page 11: Safety Procedures And Precautions
DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT Do not install substitute parts or perform any unauthorized modification to the instrument. Return the instrument to an MKS Calibration and Service Center for service and repair to ensure that all safety features are maintained. - Page 12 Safety Information INSTALL A SUITABLE BURST DISC When operating from a pressurized gas source, a suitable burst disc should be installed in the vacuum system to prevent system explosion should the system pressure rise. KEEP THE UNIT FREE OF CONTAMINANTS Do not allow contaminants of any kind to enter the unit before or during use.
-
Page 13: Chapter One: General Information
Chapter One: General Information Introduction Chapter One: General Information Introduction The MKS Type 41A/42A/51A/52A Mini Vacuum Pressure Switch is based on the proven Type 700/800 Series mini Baratron capacitance manometer technology. The small footprint of the 41/42/51/52 pressure switch makes it ideal for applications with limited space. The switches are available in a single-ended or flow-through configuration, using either an absolute or gage transducer. -
Page 14: How This Manual Is Organized
Calibration and Service Center before shipping. The ERA Number expedites handling and ensures proper servicing of your instrument. Please refer to the inside of the back cover of this manual for a list of MKS Calibration and Service Centers. Warning All returns to MKS Instruments must be free of harmful, corrosive, radioactive, or toxic materials. -
Page 15: Chapter Two: Installation
If you find any damage, notify your carrier and MKS immediately. If it is necessary to return the unit to MKS, obtain an ERA Number (Equipment Return Authorization Number) from the MKS Service Center before shipping. -
Page 16: Product Location And Requirements
Product Location and Requirements Chapter Two: Installation Product Location and Requirements • Ambient Operating Temperature: 0° to 50° C (32° to 122° F) • Ventilation requirements include sufficient air circulation • Storage Temperature Range: -20° to +80° C (-4° to 176° F) •... -
Page 17: Figure 2: Dimensions Of Low Pressure Single-Ended Units
Chapter Two: Installation Setup Low Pressure Units 10 through 1200 Torr 1.50 (38.1) Dia. 0.19 (4.8) 1.84 (46.6) 0.99 (25.1) 4-VCR Fixed Male Fitting Optional Fittings: 0.62 Hex Flat 0.34 (8.6) Typ 0.74 0.46 0.92 (23.4) (18.8) (11.8) " NPT Male "... -
Page 18: Dimensions Of The Flow-Through Units
Setup Chapter Two: Installation Dimensions of the Flow-Through Units Note All dimensions are listed in inches with millimeters referenced in parentheses. The dimensions of the flow-through version are the same for high and low pressure units. 1.50 (38.1) Dia 0.19 (4.8) 2.45 (62.2) 4-VCR Male Fitting Mating 4-VCR Connector... -
Page 19: Electrical Information
Chapter Two: Installation Electrical Information Electrical Information The 41/42/51/52 switches require an external power supply capable of supplying either 10 to 20 VDC @ 35 mA maximum or 20 to 30 VDC @ 30 mA maximum. Type “D” Connector The pressure switch is available with a 9-pin male Type “D” connector. The connector pinout is listed in Table 4. -
Page 20: Flying Leads Connector
Electrical Information Chapter Two: Installation Flying Leads Connector The flying leads connector has 2 foot long cable with six (6) leads. The color assignments are listed in Table 5. Pinout of the Flying Leads Connector Wire Assignment Power Input (+) Black Power Return (-) Green... -
Page 21: Interface Cables
As of January 1, 1996, all products shipped to the European Community must comply with the EMC Directive 89/336/EEC, which covers radio frequency emissions and immunity tests. MKS products that meet these requirements are identified by application of the CE Mark. -
Page 22: Generic Shielded Cable Description
Chapter Two: Installation Generic Shielded Cable Description MKS offers a full line of cables for all MKS equipment. Should you choose to manufacture your own cables, follow the guidelines listed below: 1. The cable must have an overall metal braided shield, covering all wires. Neither aluminum foil nor spiral shielding will be as effective;... -
Page 23: Special Consideration For The Ground Connection
Chapter Two: Installation Interface Cables Special Consideration for the Ground Connection If you choose to make your own cable you must properly ground the cable on both ends to ensure electromagnetic integrity and compliance with CE regulations. Figure 4 identifies the components of a cable designed to connect to a Type “D”... - Page 24 Interface Cables Chapter Two: Installation This page intentionally left blank.
-
Page 25: Chapter Three: Overview
Chapter Three: Overview General Information Chapter Three: Overview General Information The 41/42/51/52 pressure switch output is represented by a change of state of relay contacts to indicate when the pressure of the system exceeds a factory set pressure value. Note The trip point pressure value cannot be changed in the field. -
Page 26: Trip Point Label
Sensor Chapter Three: Overview Trip Point Label Each mini-pressure switch also carries a label to identify the action of the trip point. The trip point action is set at the factory to energize when the pressure is either above or below the trip point. -
Page 27: Trip Point Value
Chapter Three: Overview Trip Point Value Trip Point Value The trip point pressure is designated at the time the unit is ordered and cannot be changed in the field. Caution The trip point value is NOT ADJUSTABLE. Before operating the switch, ensure that the range of pressure for the system is appropriate for the particular 41/42/51/52 switch. -
Page 28: Method Of Operation
Method of Operation Chapter Three: Overview Method of Operation The 41/42/51/52 pressure switch changes the state of a relay when the pressure crosses the trip point pressure. The pressure switch is set at the factory in one of two settings: Relay energizes when the pressure rises above the trip point pressure Relay energizes when the pressure drops below the trip point pressure Note... -
Page 29: Units Set To Energize Below The Trip Point Pressure
Chapter Three: Overview Method of Operation Units Set to Energize Below the Trip Point Pressure When the measured pressure is above the trip point value, the relay is in its normal state; the normally open contact is open and the normally closed contact is closed. When the pressure falls below the trip point value, the relay changes to its tripped state;... -
Page 30: How A Gage Switch Works
How A Gage Switch Works Chapter Three: Overview How A Gage Switch Works The 41 and 42 gage pressure switches can measure pressure both above and below atmospheric pressure (that is both positive and negative pressure). A gage pressure switch can be used as an atmospheric switch;... -
Page 31: Chapter Four: Operation
Chapter Four: Operation How To Use the Pressure Switch Chapter Four: Operation How To Use the Pressure Switch There are no user adjustments on the pressure switch. 1. Connect the relay outputs. 2. Connect power to the switch. 3. Apply power to the switch. Caution The trip point value is NOT ADJUSTABLE. - Page 32 How To Use the Pressure Switch Chapter Four: Operation This page intentionally left blank.
-
Page 33: Chapter Five: Maintenance
ERA Number (Equipment Return Authorization Number) from the MKS Calibration and Service Center before shipping. The ERA Number expedites handling and ensures proper servicing of your instrument. Please refer to the inside of the back cover of this manual for a list of MKS Calibration and Service Centers. Warning All returns to MKS Instruments must be free of harmful, corrosive, radioactive, or toxic materials. - Page 34 Repair Chapter Five: Maintenance This page intentionally left blank.
-
Page 35: Appendix A: Product Specifications
Appendix A: Product Specifications Performance Specifications Appendix A: Product Specifications Performance Specifications ±0.5% of Full Scale + temperature coefficient Accuracy (of trip point) CE Compliance EMC Directive 89/336/EEC Electromagnetic Compatibility Leak Integrity (internal to external) < 10 scc/sec He Relay Rating 0.1 to 1.0 Amp resistive @ 30 VDC Temperature Coefficient ±0.07% of Full Scale/°... -
Page 36: Physical Specifications
Physical Specifications Appendix A: Product Specifications Physical Specifications Burst Pressure 10 times full scale or 90 psia, whichever is greater Connector 9-pin Type “D” or flying leads Description Single-Ended gage unit Flow-Through gage unit Single-Ended absolute unit Flow-Through absolute unit Dimensions Flow-Through 1.5”... -
Page 37: Electrical Specifications
Appendix A: Product Specifications Electrical Specifications Electrical Specifications Input Power 10 to 20 VDC @ 35 mA maximum or 20 to 30 VDC @ 30 mA maximum Relay Single pole, double throw switch, one normally open (NO), one normally closed (NC) form “C” relay Relay Contact Rating 1.0 A resistive at 30 VDC Environmental Specifications... - Page 38 Environmental Specifications Appendix A: Product Specifications This page intentionally left blank.
-
Page 39: Appendix B: Model Code Explanation
Input Power Relay Mode Connector Trip Point Type Number (AAA) This designates the model number of the instrument. Type Number and Description Ordering Code 41A Single-Ended Gage Unit 42A Flow-Through Gage Unit 51A Single-Ended Absolute Unit 52A Flow-Through Absolute Unit... - Page 40 Model Code Appendix B: Model Code Explanation Full Scale Range and Units (BB and C) The full scale range is indicated by a two digit code (BB) and the engineering units have a one letter code (C). Consult Applications Engineering for other engineering units. Full Scale Ranges Value Comments...
- Page 41 Appendix B: Model Code Explanation Model Code Full Scale Range for Reverse Calibration Only (Types 41 and 42 only) Value Comments Ordering Code 10 Torr Type 41 only 30 Torr Type 41 only 100 Torr Type 41 only 500 Torr Type 41 only 1000 Torr 20 psi...
- Page 42 Model Code Appendix B: Model Code Explanation Fittings (DD) Four types of fittings are available, designated by a two letter code. Single Ended Fitting Options (Type 41/51) Ordering Code Swagelok 4-VCR fixed male NW-16-KF (1200 Torr maximum) ¹/ ” NPT, male ¼”...
- Page 43 Appendix B: Model Code Explanation Model Code Trip Point Value (HHH) The trip point value is designated by a three digit code. The trip point must be designated in the same pressure units as the full scale range. For example, a 1000 Torr full scale unit with a trip point of “760”...
- Page 44 Model Code Appendix B: Model Code Explanation This page intentionally left blank.
-
Page 45: Index
Index Index Input power, 11, 29, 34 Accuracy, 19, 27 Atmospheric pressure, 35 Atmospheric switch, 22 Maintenance, 25 Manual organization, 6 Baratron, 5 Measurement side, 18 Model code, 31 Mounting, 10 CE Mark, 17 Connectors, 11–12, 27, 34 Customer support, 6 Power, 34 Pressure units, 19, 22, 32 Product label, 17... - Page 46 Index Temperature, operating, 8 Temperature, storage, 8 Trip point, 5, 12, 17, 19, 20–21, 23, 34, 35 accuracy, 19 hysteresis, 21, 27 value, 19 Type 41, 5 Type 42, 5 Type 51, 5 Type 52, 5 Units, 19, 22, 32 Warm up, 23...
Need help?
Do you have a question about the 41A and is the answer not in the manual?
Questions and answers