Hemisphere GPS S321 Non-UHF, User Manual

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S321 User Guide Chapter 3 – Setup and Configuration Page 42 of 65
How to Calibrate S321 Internal Sensors
After the software has been installed, you can calibrate the S321’s internal sensors using the
CalibrationTool software running on a Windows Mobile/WEHH
‐
based data collector. The
complete calibration consists of three steps:
Step 1
‐
Electronic Bubble Calibration
‐
calibrates the tilt sensors necessary to use the
electronic bubble or Live Digital Level (LDL) feature in SurvCE . The Electronic Bubble calibration
is the basic, fundamental calibration for any sensor
‐
related commands in SurvCE . If you only
plan on using the leveling features like LDL (or electronic
‐
bubble), level tolerance checking or
auto store by leveling, then you need only perform Step 1 calibration.
The Electronic Bubble Calibration can also be performed from a SurvCE/PC configured with the
S321 driver and using the Equip/GPS Utilities/Sensor Calibration/Zero Calibration function. The
setup and preparation for Electronic Bubble Calibration from SurvCE/PC is the same as
described below for the
CalibrationTool software.
Step 2
‐
Magnetic Calibration & Step 3
‐
Magnetic Bias Angle (magnetic declination)
adjustment
‐
calibrate the e
‐
compass sensors in the S321 and are only required if you are
planning to use SurvCE’s inclined pole compensation features while taking GNSS
measurements in SurvCE’s Store Points or Stake functions.
Preparation
The following equipment is required to complete all three calibration steps.
Qty. Description
1 2 m Survey Pole
1 Vertical Rotation Bracket