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MKS Baratron 627A - User Manual

MKS Baratron 627A
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

  • M
    michaelturnerAug 8, 2025
    What to do if MKS Transducer shows overrange signal?
    • K
      Kristen KlineAug 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
    Marcus CookAug 18, 2025
    Why MKS Transducer has unstable zero output?
    • C
      Christopher PearsonAug 18, 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.
  • J
    Jacob JacksonAug 28, 2025
    What to do if MKS Baratron 627A measurement slowly goes positive?
    • M
      melindafoxAug 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

MKS Baratron Absolute Pressure Transducers

Warranty Information

Special Notice on Fittings

Warns against using specific compression fittings due to potential damage and voided warranty.

Safety Information

Safety Procedures and Precautions

Instrument Modification and Service

Prohibits unauthorized part substitution or modification, recommending factory service for repairs and maintenance.

Hazardous Materials and Purging

Advises caution with hazardous materials, proper purging, and prohibits operation in explosive environments.

Fittings and Tightening Procedures

Emphasizes using correct fittings and following manufacturer instructions for assembly and tightening.

Chapter 2: Installation

Checking the Transducer Zero

Coarse Zero Adjustment

Chapter 4: Operation

External Zero Adjustment for Type 629

Chapter 5: Maintenance and Troubleshooting

Zero Adjustment Procedures

Troubleshooting Common Issues

MKS Baratron 627A Specifications

General IconGeneral
TypeCapacitance Manometer
Accuracy±0.25% of reading
Pressure Range0 to 1000 Torr
Output Signal0 to 10 VDC
Temperature Range0 to 50 °C
Operating Temperature0 to 50 °C
Power Supply+15 VDC and -15 VDC
Pressure Connection1/4" VCR Male
Electrical Connection9-pin D-sub connector

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