SmartSeis and StrataView Seismographs FAQ

1. The printer on my Smartseis does not print the seismic traces.

Below are some printer tests that might help. If the printer does not work in the seismic program, test the printer in DOS mode. After boot up, exit to DOS, using an external keyboard use DOS commands to copy or print a file to the printer. If this works the printer hardware is functional. If not working in DOS mode, check printer lever, cables to printer, fuse on printer interface PCB, power to/for printer from the power supply, and the blue ribbon cable on the back of the seismograph. An external printer can be attached to verify if the printer circuitry is operational. Report to Geometrics ustomer service what tests you were able to perform and the results. Report any error messages on boot up indicating printer failure. When did the printer last work? Was an external printer used? If yes, check the blue ribbon cable on the parallel port on the back of the system for bent pins or faulty contact.

2. The characters on my Smartseis/Strataview screen in DOS mode are not readable.

From your description I suspect a problem with the CMOS bios settings. You can you access the CMOS bios settings by pressing the delete key during boot up. Use an external monitor and external keyboard. During the boot up sequence the message "press delete to run setup" will appear. Press delete at that time, (note some units ask to press F2 key instead of delete). Once in the setup menu, if you have the original paperwork sent with the system, compare it to the current settings. If you do not have the original CMOS setup printout, copy the information(print screen) and fax or E-mail it to Geometrics Customer service. CMOS memory can be corrupted if the power to the system is abruptly removed during an operation, or if the CMOS battery is old and starting to fail. If this is the case the problem will occur again after the unit has been shut off for a period of time. It can also occur if there is a problem with the CPU or mother board and the CMOS memory location is inadvertently accessed.

3. My Smartseis or Stataview will not boot up.

Below are some suggestions to help in identifying the problem with the seismograph.

Please describe exactly what is happening during the boot up process. Can you hear the fan and hard drive running? Verify the input power source is supplying a consistent 12 volts. Remove the instrument from the case and apply power. There are five Green LED indicators on the power supply PCB (bottom circuit board). They should all be lit and approximately the same brightness. Each indicates that a power module on the power supply board is working. Also check the three Green LED indicators on the back of the display assembly. Lift the display lid, the LED's are located on the right hand side and can be viewed through a small access hole in the black panel. There are two more LED's on each acquisition PCB, located one third of the way in, on the left hand side, look behind the mounting bracket which holds the PC boards in.

Attach an external monitor to the system and report any text messages that appear. Does the system boot up to the normal seismic program screen? If not what is the last message which did appear? Please report the results of the above tests to Geometrics customer service.

4. I cannot find my saved SEG-Y files on my hard drive?

Unlike other SEG recording standards, SEG-Y stores trace information from multiple records in a single file. A new file is created when acquisition parameters are changed. You can examine a particular record by using the File menu item in your MGOS, SGOS, Controller, or StrataVisor NX software.

5. I'm having trouble triggering my seismograph.

Geometrics seismographs are designed to trigger on a contact closure, contact open, or signal input. The trigger circuit has protect from high voltages, but it is possible to damage the input circuit if voltages outside the specified range are connected directly to the input circuit. It is recommended that input signals, or voltages do not exceed + 10 volts.

A typical voltage measurement using a hand held volt meter on pins A (+) and B (-) of the 3 pin trigger input connector will be 4.9 volts DC. Voltages less than 4.0 volts may indicate a problem with the trigger circuitry. Often times the unit will continue to operate and trigger, but should be serviced at the next opportunity. If the circuit has been damaged, typical problems will include false triggers, or failure to trigger.

To verify the trigger function of the Seismograph, begin by removing the external connector from the trigger input, and short pins "A" and "B" together on the trigger input connector of the seismograph. The unit should trigger each time the pins touched as long as the interval between triggers is greater than the record time or the trigger hold off whichever is longer. It should not trigger unless these pins are touched. If consistent triggering is achieved using this method, then attach the hammer switch directly to the seismograph. Do not put the hammer switch on a hammer yet. Tap the hammer switch cylinder on the edge of a table or other hard object and verify consistent triggering. Watch the stack count on the screen to confirm each tap of the hammer switch results in a trigger of seismograph. Check the trigger hold off setting and trigger sensitivity settings. Set the trigger hold off to 0.5 sec. and the trigger sensitivity to 50. If the seismograph is triggering correctly, insert any trigger extension cables between the hammer switch and the seismograph. Repeat the test to confirm consistent triggering. Then attach the hammer switch to the hammer, or other device used for triggering. Make sure the cylinder of the hammer switch is firmly taped to the handle, and the direction of motion is across the diameter of the cylinder. You can also attach a geophone or other signal producing devise at this point and verify proper triggering.

If the unit does not properly trigger, contact Geometrics customer service with the results of the tests above for assistance.

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