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Here are some of the articles that have been recently posted to the PASSCAL website:

Leveling Broadband Sensors

Fetch the sensor planned for the site and write its serial number on the station's Installation Sheet, preferably in pencil, because if the sensor does not work properly, you will have to try a different one. Loosen the sensor feet (the foot-locking mechanisms may need to be backed off) and shorten the feet (also known as legs) as much as possible. Clean grit off the sensor pad. Place the sensor on the sensor pad and adjust the sensor's position until its orienting keys are precisely aligned.

Interpreting an RT130 Log

RT130 log files are most easily viewed and interpreted with the program LOGPEEK. LOGPEEK is part of the PASSOFT software package.     This figure shows how LOGPEEK looks under normal operation. For more help or detail please see the Help section within LOGPEEK.  

 



This shows a short summary of what fields are displayed graphically in LOGPEEK and what they mean.

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Programming RT130's

The RT130 can be configured using any PalmOS device that has a serial interface and the program PFC-130, but the PASSCAL Instrument Center exclusively uses and provides Sony Cliés.

 

The following is an example outline of an RT130 configuration using the PFC-130 program. The outline is intended as a quick reference guide only and is not a substitute for training or reading the official manufacturer's manual. For detailed information on programming the RT130 using PFC-130, consult the manufacturer's RT130 information page and brochure.

PFC-130 Quick Reference Guide to Programming

Note: Items marked with * are information that will be written to the log file, but will not affect the operation of the RT130.

Programming Q330's

Q330 parameters are created using the Willard program.  Because the Q330 has a complicated and highly flexible parameter set, it should only be created by experienced users.  Contact PASSCAL staff for assistance in developing a Q330 parameter set for your application.

Loading Programs From a Clie To RT130's

This page is meant as a quick reference guide for using the Clié program "PFC-130" to load configuration parameters to a RT130. When deploying RT130's in the field, you will be provided an installation worksheet which covers the same steps but with more detail specific to your experiment.

Basic Guide for Loading Parameters to a RT130 from a Clié

1. Open PFC-130, on the Clié

2. Select Work with Configuration

3. Load (Load Configuration Pre-Written or Loaded Config File)

4. Select OK

5. Verify Configuration Name top of screen

6. Send to DAS

7. Select OK

8. Select Done

9. Re-Enter Work with Configuration

10. Select from DAS (Load from DAS)

11. Edit

12. Confirm Experiment Name

Computer Best Practices

Hard drives and disk space Drives and partitions

IRIS PASSCAL prepared laptops all come with a separate partition for user and experiment data that can be accessed at /data

PASSCAL linux laptops (PCs) come with two hard drives.  On each drive is a complete, tested installation of Fedora linux and a current version of PASSOFT. Each drive is bootable and provides a redundant system. On each drive space is allocated for data and is RAIDed together as the /data directory accessible from either installation.

If you are having a problem and want to try using the backup installation, start tapping the Escape key after the BIOS has finished loading in order to see the GRUB menu.  Then select one of the installations of Fedora to boot into it.  If you saved your data in /data, you will still have access when booted from the backup installation.

Guralp CMG-40T-1 Short Period Sensor

The CMG 40T-1sec seismometer looks, on the outside, just like the CMG 40T-30sec, intermediate period seismometer. Its response, however, is tuned to short-period signals (1-100Hz). One hundred of these feedback seismometers were purchased for the Flexible Array sensor pool.

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Short-Period Sensors

PASSCAL Short-period Sensors: Sercel  L-22 Guralp CMG-40T-1 Features:

Short-period sensors are rugged three-component seismometers that cover the frequency band from 1 Hz to 100 Hz. These sensors are used in both passive and active-source experiments. PASSCAL's short-period sensors can be either feedback seismometers requiring power or conventional, passive seismometers requiring no external power.

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