Van Essen Diver-MOD-AS339, Руководство по эксплуатации продукта, Страница: 16 / 31

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The pressure range is defined as the span of the pressure in cmH2O over which the Diver can
measure pressure. The pressure range can be read from register 30104. The returned value is a
signed 16-bit integer, for example “1750”.
The returned value depends on the water column that the Diver can measure. The Diver part
numbers and corresponding ranges are listed in Table 3.
Table 3 Divers and pressure range
Part No Water column /meter Range /cmH2O
DI500 1.5 750
DI501, DI601, DI701, DI271
10 1750
DI502, DI602, DI702
20 2750
DI505, DI605, DI705, DI272 50 5750
DI511, DI610, DI710, DI273 100 10750
Temperature Reference and Range
The temperature data is stored in channel 2. The unit of temperature is degree Celsius.
The temperature reference is defined as the value (offset) in degree Celsius from which the Diver
starts measuring temperature. For all the supported Divers this is -20 °C. The temperature reference
can be read from register 30102. The returned value is a signed 16-bit integer, for example “-20”.
The temperature range is defined as the span of the temperature in degree Celsius over which the
Diver can measure temperature. For all the supported Divers this is 100 °C. The temperature range
can be read from register 30105. The returned value is a signed 16-bit integer, for example “100”.
Conductivity Reference and Range
This section applies to the CTD-Diver only. The conductivity data is stored in channel 3. The unit of
conductivity is milli Siemens per centimeter (mS/cm).
The conductivity reference is defined as the value (offset) in mS/cm from which the CTD-Diver starts
measuring conductivity. For the CTD-Diver this is 0 mS/cm. The conductivity reference can be read
from register 30103. The returned value is a signed 16-bit integer, for example “0”.
The conductivity range is defined as the span of the conductivity in mS/cm over which the Diver can
measure conductivity. This range can be adjusted by the user to (30, 120 or 300) mS/cm. The
conductivity range can be read from register 30106. The returned value is a signed 16-bit integer, for
example “120”.
Note: If a regular Diver, i.e. not a CTD-Diver, is connected to the Diver-MOD the returned values for
the conductivity reference and range will be “0”.
4.2 Time Series Data
Each Diver data record consists of a timestamp, a pressure value, a temperature value and a
conductivity value (CTD-Diver only). Each Diver data record is stored in the Diver-MOD in 4 registers
as depicted in Figure 5.