The Laboratory Recorder

1. Front Matter

   Pages i-vii

   PDF

2. Introduction

   • Galen W. Ewing, Harry A. Ashworth

   Pages 1-3

3. Deflection Recorders

   • Galen W. Ewing, Harry A. Ashworth

   Pages 5-13

4. Servo Recorders

   • Galen W. Ewing, Harry A. Ashworth

   Pages 15-36

5. X-Y Recorders

   • Galen W. Ewing, Harry A. Ashworth

   Pages 37-44

6. Oscillographs

   • Galen W. Ewing, Harry A. Ashworth

   Pages 45-65

7. Paper Feed and Writing Mechanisms

   • Galen W. Ewing, Harry A. Ashworth

   Pages 67-84

8. Shielding and Grounding

   • Galen W. Ewing, Harry A. Ashworth

   Pages 85-96

9. Recorder Specifications

   • Galen W. Ewing, Harry A. Ashworth

   Pages 97-103

10. Troubleshooting

    • Galen W. Ewing, Harry A. Ashworth

    Pages 105-110

11. Recorder Accessories

    • Galen W. Ewing, Harry A. Ashworth

    Pages 111-118

12. Back Matter

    Pages 119-129

    PDF

One of the most universal functions of any scientific or engineer­ ing laboratory is the gathering of data to provide answers to immediate questions or information to be filed for future refer­ ence. Such data gathering may be achieved in various ways, depending on the nature and quantity of the information. The most prevalent of such data gathering methods is undoubtedly analog recording. Electrical analog recorders are available in a variety of sizes, speeds, sensitivities, and prices. They are suitable for recording any signal which is in, or can be converted to, electrical form. These recorders are found in every modern laboratory. Without them the importance of many functional relations would be missed altogether. How could one adequately diagnose a heart ailment without a cardiographic recorder, or obtain infrared or magnetic resonance spectra on any practicable basis without a strip-chart recorder? True, various curves that are now traced automatically with a recorder can be plotted manually from point-by-point measure­ ments. This procedure, however, is not only time-consuming, but may cause valid bits of information to be overlooked entirely, simply because the points were taken too far apart. Another factor favoring the use of recorders is the ability to pinpoint faulty operation of the data-gathering system. Artifacts that might not be observable at all in point-by-point observations 1 The Laboratory Recorder 2 will often be readily identifiable on a recording. Asymmetry of a peaked curve, for example, is only dearly evident in a recording.

• Laboratory
• Pen
• diagnosis
• information
• magnetic resonance
• media
• nature
• system

• Seton Hall University, South Orange, USA

  Galen W. Ewing, Harry A. Ashworth

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