Table of Contents
Summary of Contents for Geospace GSB
- Page 1 GSB User Manual User Manual Geospace Technologies Corporation 7007 Pinemont Drive Houston, TX 77040 TEL (713) 986-4444 FAX (713) 986-4447 www.geospace.com GSB User Manual (593-01940-01 Rev C) release date: TBD Page 1 of 27...
- Page 2 U.S.A. Copyright violators may be subject to civil penalties. DISCLAIMER: Geospace Technologies Corporation makes no warranties as to the accuracy, validity, or fitness for use of the contents of this Manual. Geospace Technologies Corporation reserves the right to revise the information in this Manual at any time without prior notice.
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Page 3: Table Of Contents
GSB User Manual Table of Contents 1. - Features ........................4 2. – GSB data downloader and charger ..............5 2.1 – Portable chargers and data retrieval .............. 5 2.2 – GSB trailer ......................6 3. – GSB operational modes ..................6 3.1 –... -
Page 4: Features
Battery life: 60 days @ 24 hours/day operation for 1 channel devices or 40 days for 3 channels A low power option is available for GSB-3s to increase operation time Record time can be extended by connecting an external battery or a solar panel ... -
Page 5: Gsb Data Downloader And Charger
Light weight 1 Kg (1 or 3 channels models) – GSB data downloader and charger The GSB racks provide an interface to download data and charge the internal battery. The racks are 12 slots modular. There are two types of racks available to be used with the GSBs: •... -
Page 6: Gsb Trailer
– GSB trailer The GSB trailer includes several modules according to the customer’s request, each module can charge the internal battery and retrieve seismic data from up to 60 GSBs simultaneously. A trailer with 8 modules (480 slots) can charge approximately 2000 GSBs per days. -
Page 7: Record Mode
GSB User Manual • Sleep mode. GSB is on, but it does not record seismic data (to reduce power consumption) • Disabled mode. GSB had not been activated to start recording data • Search lost device mode. To improve the GSP position accuracy and display a SOS pattern in the LED •... -
Page 8: Sleep Mode
4.2. 3.4 – Search lost device mode In this mode, the GSB searches for GPS for 15 minutes to get an accurate position while showing a SOS LED pattern. It helps to improve its location if the device is recording or to find a disabled device (lost in the field). To put a device in this mode, the user should use the LHR+LHV combo to perform the “Find Lost... -
Page 9: 4- Field Operation Instructions
GSB User Manual The GSB LED flashes 5 times per second while they are in the rack. Once they are removed from the rack (or the rack is powered off), the LED flashes on solid for 5 seconds and then turns off. - Page 10 GSB User Manual B. Put the GSB in record mode: a. Hold the GSB from the geophone side, and keep it as vertical as possible (see notes at the end of this section). b. Observe that the GSB LED goes to an intermediate state where the LED flashes for one second on followed by one second off pattern.
- Page 11 GSB User Manual C. Connect the sensor to the GSB. D. Set the GSB on the ground on the base plate (tilt of 90° +/- 20°). E. Observe that the LED shows the deployment sequence running geophone tests (LED flash rapidly 5 times a second). If the GSB is still showing sleep mode, because the angle on step B was incorrect, restart the sequence.
- Page 12 GSB User Manual Notes: • GSB power connector up (Tilt 0° to +/- 20°) for deployment: • GSB flat (tilt of 90° +/- 20°) : GSB User Manual (593-01940-01 Rev C) release date: TBD Page 12 of 27...
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Page 13: Picking Up Gsbs
4.2 – Picking up GSBs To pick GSBs properly from the spread, follow the next steps: A. Hold the GSB from the battery side and keep it as vertical as possible B. Wait for the LED turns on (about 10 seconds) C. - Page 14 GSB User Manual D. Disconnect the geophone E. GSB is ready to be picked up from the spread, while is disabled, the LED blinks twice every 10 seconds indicating a disabled state. F. To Transport GSBs is recommended to grab them from the geophone side to avoid going to the pre-deploy mode.
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Page 15: Gsb Led Flash Codes
0.5 seconds. Charging: LED flash on for one second and off for 1 second. Prepared to enter ship mode: LED flashes rapidly 5 times a second. GSB User Manual (593-01940-01 Rev C) release date: TBD Page 15 of 27... -
Page 16: Lineviewer, Lhr+Lhv Operations
The GSBs have inclinometers to allow measuring the angle of the case vs gravity vector as follows: Tilt information may be read in QC devices: • Using Line Viewer: GSB User Manual (593-01940-01 Rev C) release date: TBD Page 16 of 27... -
Page 17: Extended Operation Time
GSB User Manual • Using LHV+LHR: 4.5 – Extended operation time The GSB recording hours may be extended connecting an external battery or a solar panel. • Using an external battery, the GSB gets the power from the external battery first and then switches to the internal one. -
Page 18: Charge Of Internal Battery
GSB User Manual • Using a solar panel, it provides additional power to charge the internal battery and feed the GSB. The energy provided during daylight time is about 10 times the power required by a GSB. 4.6 – Charge of internal battery The charging of the internal battery is performed when the device is connected to the rack. -
Page 19: Preparing Gsbs For Storage Or Shipment
60 or 30%, they use the measured voltage to estimate the actual capacities of the batteries. The following situations can occur: • If the capacity is higher than the programmed limit, the GSB enters a “turn everything on” or “full power drain” mode. The LED is always on, which is an indication that the device is discharging. -
Page 20: Gsb Test
GSB User Manual • If the capacity is lower than the programmed limit, the GSB battery is charged until it reaches the programmed capacity, and the LED flashes on for one second and off for 1 second. Once it finishes the charge, the LED flashes rapidly 5 times per second. -
Page 21: Instrument Test
Test specifications are in Table 1. Table 1: GSB THD Instrument Test Gain Accuracy: The gain accuracy test confirms that the gain calibration applied by the channel yields the proper DC value. The test uses the internal test oscillator to measure the various gain steps in a series of 21 measurements. - Page 22 The results are reported as the percent error for each expected 2:1 gain step. Test specifications are in Table 2. Table 2: GSB Gain Accuracy Instrument Test Dynamic Range: This test measures the signal to noise ratio of the seismic channel.
- Page 23 Crossfeed: This test is implemented only in GSB-3. It measures the Crossfeed from adjacent channels and reports the results in decibels (dB Vrms).
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Page 24: Sensor Test
Crossfeed voltages are displayed in dBVrms. This test can run at any gain. Test specifications are in Table 5. Table 5: GSB-3 Crossfeed Instrument Test CMRR: In this test, the input switches are connected to the test oscillator position. The test oscillator is set to generate a common mode signal of 31.25 Hz sinusoidal wave at 55% of full amplitude. - Page 25 ADC input. A comparison vs maximum ratio selected by user provides a pass/fail result. • Geophone Crossfeed: This is a test valid only for GSB-3s. It evaluates the amount of energy that can be transferred to a different channel.
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Page 26: 6- Attachments
GSB User Manual 6– Attachments 6.1 – GSB-1 specifications GSB User Manual (593-01940-01 Rev C) release date: TBD Page 26 of 27... -
Page 27: Gsb-3 Specifications
GSB User Manual 6.2 – GSB-3 specifications GSB User Manual (593-01940-01 Rev C) release date: TBD Page 27 of 27...
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