Geometrics G-882 User Manual

Geometrics Inc. G-882 Cesium Marine Magnetometer Page
85
a. Dirt or corrosion
b. Bent pins
c. Backshell tight
3. Cable jacket check
a. Kinks
b. Abrasions
c. Cuts
4. Sensor orientation
a. Use MagPick IGRF and CSAZ to model sensor behavior
b. Adjust sensor orientation and observe dead zones
c. Return sensor to correct orientation for the survey area
5. Field readings
a. Reasonably close to MagPick IGRF model estimate
b. Sample to sample noise less than 0.1 nT when not moving.
6. Field Larmor amplitude check – Signal should be at least 800 when correctly
oriented. Maximum signal should be less than 2000.
7. Larmor amplitude check and adjustment (Authorized Repair Facility only)
a. Pot on GSN to adjust for 1.5 to 2.0 Volts Peak to Peak at 50,000 nT after
20 minute warm up.
8. Heater check and adjustment (Authorized Repair Facility only)
a. 34.5 K ohms after warm up

Geometrics G-882 Specifications

General

Brand	Geometrics
Model	G-882
Category	Marine Equipment
Language	English