Apple iOS Software Reference (Single Chamber Mode)
9-33
RH% Relative humidity inside the soil chamber.
V1 Aux Input at voltage channel 1.
V2 Aux Input at voltage channel 2.
V3 Aux Input at voltage channel 3.
V4 Aux Input at voltage channel 4.
T1 Aux Input at thermocouple channel 1, in degrees C.
T2 Aux Input at thermocouple channel 2, in degrees C.
T3 Aux Input at thermocouple channel 3, in degrees C.
T4 Aux Input at thermocouple channel 4, in degrees C.
CRC Cyclic Redundancy Check (see note below).
Strip Remove markup (see note below).
CRC (Cyclic Redundancy Check) is an algorithm that is used to verify the
integrity of the data. Before each data packet is sent by the LI-8100A, a CRC
is calculated (pre-transmission) for that packet, and then appended to the
packet. When the client (e.g. the computer) receives the packet, it strips off
the appended CRC and calculates its own CRC (post transmission). If the two
CRC values match, it is assumed that the packet was transmitted correctly.
When CRC values are appended to the data packet, the value is automatically
marked up. A typical CRC will appear as
<CRC>3067450353</CRC>
Disable 'CRC' to remove CRC from the data. Note that the LI-8100A PDA
applications do not use CRC checking.
Note that when the LI-8100A outputs data, each field is "marked up" using
eXtensible Markup Language (XML) to delimit that field. For example, when a
CO
2
value is output, the data value is placed between two "tags" that describe
what that value is, as in:
<CO2>350.21</CO2>
Enable 'Strip' to remove the markup from the data stream. The resulting data
set is a data stream where each data field is separated by a space.
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