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12
Figure 5
A Diver data record is stored in four registers in the Diver-MOD memory
Timestamp
The first or time register has a value from 0 to 250. Only the first Diver data record will have a 0 for
the time register. The time register will be 1 if the Diver sample method is set to
fixed
or
averaging
.
For other sample methods, the time ranges from 1 to 250.
The timestamp of the first Diver data record is equal to the start time form the header information.
For each subsequent Diver data record the timestamp value can be calculated from:
Timestamp of previous Diver data sample interval × time register
Pressure
The second or pressure register has decimal values from 0 to 30,000 (P
DEC
). Use the pressure
reference and range from the header information to convert these values to engineering units (P
ENG
):
P
ENG
= P
DEC
/ 30000 × range + reference
If the pressure must be converted to a different unit then refer to Appendix C for conversion factors.
Temperature
The third or temp register has decimal values from 0 to 30,000 (T
DEC
). Use the temperature reference
and range from the header information to convert these values to engineering units (T
ENG
):
T
ENG
= T
DEC
/ 30000 × range + reference
Conductivity
The fourth or conductivity register has decimal values from 0 to 30,000 (C
DEC
). Use the pressure
reference and range from the header information to convert these values to engineering units (C
ENG
):
C
ENG
= C
DEC
/ 30000 × range + reference
Time Series Data
The Diver time series data is stored in the Diver-MOD in memory blocks of 2,000 records each. The
memory block is selected by setting register 40041 from 0 to 35 in. Subsequently, the 2,000 records
from the specified block can be read from register 32001 to 40000. A functional block diagram of this
workflow is shown in Figure 6.