User manual
Table Of Contents
- Cover
- Title Page
- Table of Contents
- List of Tables
- List of Figures
- Preface
- Software Installation
- U.S. Export ControlLaws Compliance
- Publication Updates
- Symbols Used in This Document
- Safety
- Quick Start
- Description
- Operation
- Special Topics
- Host Interface
- Calibration and Warranty
- Appendix A: Specifications
- Index
Operation
39
Auto vs. Manual
Ranging Mode
Auto Ranging (Auto) enables FieldMaxII-TO to auto-
matically select the range (gain). While in Auto Ranging
mode, the tuning needles represent a zero-to-full scale
movement (as compared to Tuning mode, where the
zones overlap). Refer to Figure 12.
Manual ranging requires the range to be selected by
the user. For more information, refer to “Up and
Down Arrows” on page 34.
Zeroing
Thermopile and optical sensors require periodic zeroing.
Zeroing occurs when a meter attempts to null out any
signal coming from the sensor and establish a zero-
power baseline. If Auto Ranging is active, the sensor is
zeroed for every available range. If Auto Ranging is not
Figure 12. Auto Ranging
Tuning Needles