Mini-Seis III Pro™ Operating Manual
Page 47
TA
This command sets or returns the linear acoustic trigger level in A/D counts. To determine
the actual linear trigger value we use the equation:
𝑟𝑎𝑛𝑔𝑒 ∗ (
𝐴𝐷𝐶 − 32768
32768
)
Assume we are using a microphone with a range of 5.12 Mb and that the trigger A/D count is
34048. This gives us a trigger value of:
5.12 ∗ (
34048 − 32768
32768
) = 0.2
To convert that to dB we use:
20 ∗ log (
0.2
0.0000002
) = 120
If we want to determine the A/D count for a desired trigger level (TL) we use the equation:
(
𝑇𝐿
𝑟𝑎𝑛𝑔𝑒
∗ 32768) + 32768
TS
This command sets or return the seismic trigger level in A/D counts. To determine the
actual linear trigger value we use the equation:
𝑟𝑎𝑛𝑔𝑒 ∗ (
𝐴𝐷𝐶 − 32768
32768
)
Assume we are using a tri-axial geophone with a range of 10.24 ips and that the trigger A/D
count is 34048. This gives us a trigger value of:
10.24 ∗ (
34048 − 32768
32768
) = 0.4
If we want to determine the A/D count for a desired trigger level (TL) we use the equation:
(
𝑇𝐿
𝑟𝑎𝑛𝑔𝑒
∗ 32768) + 32768
TT
It will be much easier to setup multi-triggering from the instrument’s UI. However, this
command can also be used to setup multi-triggering. There are two tiers for triggering
external devices like an alarm or strobe. The TT command is followed by [sensor] [channel]
[tier] [threshold].
[sensor] – Sensor number. In the case of a 4 channel unit the sensor will be 1. In the case of
an 8 channel unit the sensor can be 1 or 2.
[channel] – Channel type. The value is 0 for acoustic or 1 for seismic.
[tier] – Tier number. The value is 1 for tier 1 or 2 for tier 2.