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MKS Baratron 628A - User Manual

MKS Baratron 628A
55 pages
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114492-P1
Rev F, 10/98
Instruction Manual
MKS Baratron
®
Type
622A/626A/627A/628A/629A
Absolute Pressure Transducers
Six Shattuck Road
Andover, MA 01810-2449
(800) 227-8766 or (978) 975-2350
Fax: (978) 975-0093
E-mail: mks@mksinst.com
Web site: http://www.mksinst.com

Table of Contents

Questions and Answers

  • S
    Sarah BlairAug 8, 2025
    What to do if MKS Baratron 628A shows overrange signal?
    • A
      Allison JensenAug 9, 2025
      If your MKS Transducer shows an overrange positive or negative signal, it might be due to a shorted transducer or a damaged cable connecting the transducer to the electronics module. Check the supply voltages at the terminal block. Carefully examine the cable and transducer for any signs of damage. If you find any issues, replace the affected components.
  • M
    Matthew GibsonAug 19, 2025
    Why MKS Baratron 628A Transducer has unstable zero output?
    • W
      William MoralesAug 19, 2025
      An unstable zero output in your MKS Transducer might be caused by ambient temperature issues. The temperature may be too high, or it may be varying too much. Make sure the ambient temperature is within the product requirements as specified in Appendix A: Product Specifications, page 41.
  • C
    Christopher JenkinsAug 28, 2025
    What to do if MKS Baratron 628A measurement slowly goes positive?
    • E
      Eric HicksAug 28, 2025
      If the measurement from your MKS Transducer slowly increases over time, it could be due to overpressure or contamination buildup in the P x cavity. You should return the transducer to MKS for servicing or replacement.

Summary

Chapter Two: Installation

Fittings

Lists available fittings and a caution regarding ferrule compression fittings.

Setup

Instructions for mounting the transducer and initial warm-up.

Checking the Transducer Zero

Procedure for checking and setting the transducer's zero point.

Coarse Zero Adjustment

Method for performing coarse zero adjustment when standard adjustment is insufficient.

Chapter Four: Operation

How to Use the External Zero on the Type 629 Unit

Explains using pin 7 for external zero adjustment and rejecting common-mode voltages.

Chapter Five: Maintenance and Troubleshooting

Appendix A: Product Specifications

MKS Types 622 and 626 Units

Detailed specifications for the MKS 622 and 626 unheated transducers.

MKS Type 627 and 629 Units

Detailed specifications for the MKS 627 and 629 temperature-controlled transducers.

MKS Type 627 and 629 50 mTorr Units

Detailed specifications for the MKS 627 and 629 50 mTorr units.

MKS Type 628 Units

Detailed specifications for the MKS 628 temperature-controlled transducer.

MKS Baratron 628A Specifications

General IconGeneral
BrandMKS
ModelBaratron 628A
CategoryTransducer
LanguageEnglish

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