Guralp Systems CD1.1 - Manual (Page 13)

Operator's Guide
Byte(s) Bit(s) Description Mapping
2 1 Dead sensor channel Not used
2 Zeroed data Not used
3 Clipped Not used
4 Calibration underway Set when calibration is in
progress on associated
component
3 1 Equipment housing open Configurable tamper monitor
2 Digitiser open Configurable tamper monitor
3 Vault door opened Configurable tamper monitor
4 Authentication seal
broken Configurable tamper monitor
5 Equipment moved Configurable tamper monitor
6–8 Future use Configurable tamper monitors
4 1 Clock diff. too large Set if clock difference
≥±1000µs (configurable)
2 GPS receiver off Set if ADC module reports no
communication from GPS, or
GPS power is off
3 GPS receiver unlocked Set if ADC module reports
clock is not phase locked to
GPS PPS signal
4 Analog input shorted Not used
5 Calibration loop back Not used
6–8 Future use Not used
5 1 Main power failure Configurable; set if voltage of
chosen line drops below
specified value
2 Backup power unstable Configurable; set if voltage of
chosen line drops below
specified value (independent
from main power failure bit)
3–8 Future use Not used
6 1–8 Undefined Configurable; 8-bit voltage,
temperature, power or
current reading #1
7 1–8 Undefined Configurable; 8-bit voltage,
temperature, power or
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