Chapter 7
Using the Web Interface
Trillium Compact User Guide
16889R5
2014-03-04
38
Temperature
The approximate unit temperature in degrees Celsius and Fahrenheit.
Case tilt
Displays the tilt of the case from vertical in degrees.
7.3 Seismometer Control
The Seismometer Control page allows you to enable or disable calibration, change the
XYZ/UVW output mode, and change the long/short period mode. Click
Apply
to save your
settings. These settings will reset to the factory default settings when the firmware is
rebooted or the unit is power cycled.
The sections on the page are as follows:
Calibration Enable
Calibration can be enabled for the three U, V, and W axes simultaneously, for a
specific axis, or disabled for all axes. Select
Use control line
to permit the control line
input to enable or disable calibration. The default setting is
Use control line
.
Output Mode
Choose the output mode of XYZ or UVW (see
Section 4.1 “UVW and XYZ Output
27 for a definition of these modes). Select
Use control line
to permit
the control line input to select between XYZ and UVW modes. The default setting is
Use
control line
.
Long or Short Period Mode
The lower corner of the seismometer response can be changed from the normal
operating mode of 120 s period to a “short period” response of approximately 1 s
period. This may be useful when levelling the seismometer, allowing you to see the
mass positions quickly respond to changes in tilt, or once the seismometer is levelled, to
allow the mass positions to quickly settle. Be sure to leave the seismometer in “120
second” (long period) mode when recording seismic signals. The default setting is
Use
control line
.
7.4 Control Lines
Use the
Control Lines
page to reconfigure the function of the CTRL/RX pin on the Trillium
Compact connector (referred to as Connector PIN D on the Web page). When set to a
positive voltage level (default), the CTRL/RX pin enables calibration. Alternatively, set this
pin to activate the short period response of the seismometer.
The case tilt feature applies to all Trillium Compact models with serial numbers 2500 and
above.
(1) Once a control is set on this page, the corresponding digital control line is subsequently
ignored. Selecting the
Use control line
option tells the Trillium Compact to again obey the
control line for that function.
(2) Settings on this page are always reset to factory defaults on powered up or reboot.
