Refraction Technology 130-01, Operation Manual

Page: 28 / 114

130-01 Operations
Refraction Technology, Inc. 14
The possible values for these parameters, as well as the possible
combinations of parameters, are different for 130-01 DAS units with
different hardware configurations, different versions of control firmware, or
both. For a comprehensive explanation of your 130-01 DAS unit's specific
capabilities and limitations, refer to the appropriate REF TEK manual: 130
Theory of Operations or to the individual board and schematic documents.
The trigger type selected for a datastream defines the particular mechanism
that determines when the 130-01 DAS collects data. The various predefined
trigger types supported are as follows:
ƒ
Continuous trigger
ƒ
Level trigger
ƒ
Cross trigger
ƒ
External trigger
ƒ
Time Interval trigger
ƒ
Time List trigger
ƒ
Event trigger
ƒ
Vote trigger
Each trigger has its own set of parameters that determines the exact
conditions under which the 130-01 DAS records data.
Detailed explanations and methods for using all 130-01 DAS unit
parameters, including datastreams and triggers, are provided in subsequent
sections in this manual.
Refraction Technology pre-sets and tests the hardware of each 130-01 DAS
before you receive the unit to ensure that it performs as specified. The 130-
01 DAS units do not require hardware adjustments for normal operations.
You may use a 130-01 DAS unit as a stand-alone recorder, or you may use a
network of many 130-01 DAS units deployed over a survey site. During field
operations, the 130-01 DAS can store data either in its own internal RAM or
Compact Flash. The 130-01 has two ports (Ethernet and Telemetry) that
allow connection to networks locally or remotely (by radio, telephone, or
satellite relays). Some networks include both local and remote
interconnections.
All 130-01 DAS units employ hardware, firmware, and interface software
that complies with the requirements of the IRIS PASSCAL Program, portable
and telemetry stations, US ARRAY (the USGS and ANSS) specification for
national, regional, strong motion, and structural stations.