Transparent mode may need to wait for commands issued by the programmed mode to finish
before sending responses. While in transparent mode, the datalogger programs may not execute.
Datalogger security may need to be unlocked before transparent mode can be activated.
Transparent mode is entered while the computer is communicating with the datalogger through
a terminal emulator program such as through Device Configuration Utility or other datalogger
support software. Keyboard displays cannot be used. For how-to instructions for communicating
directly with an SDI-12 sensor using a terminal emulator, watch this video.
To enter the SDI-12 transparent mode, enter the datalogger support software terminal emulator:
1. Press Enter until the datalogger responds with the prompt CR1000X>.
2. Type SDI12 at the prompt and press Enter.
3. In response, the query Enter Cx Port is presented with a list of available ports. Enter
the port number assigned to the terminal to which the SDI-12 sensor is connected, and
press Enter. For example, 1 is entered for terminal C1.
4. An Entering SDI12 Terminal response indicates that SDI-12 transparent mode is
active and ready to transmit SDI-12 commands and display responses.
The terminal-mode utility allows monitoring of SDI-12 traffic by using the watch command
(sniffer mode). Watch an instructional this video or use the following instructions.
1. Enter the terminal mode as described previously.
2. Press Enter until a CR1000X> prompt appears.
3. Type W and then press Enter.
4. In response, the query Select: is presented with a list of available ports. Enter the port
number assigned to the terminal to which the SDI-12 sensor is connected, and press Enter.
5. In answer to Enter timeout (secs): type 100 and press Enter.
6. In response to the query ASCII (Y)?, type Y and press Enter.
7. SDI-12 communications are then opened for viewing.
7.7.1.1 SDI-12 transparent mode commands
SDI-12 commands and responses are defined by the SDI-12 Support Group (www.sdi-12.org) and
are available in the SDI-12 Specification. Sensor manufacturers determine which commands to
support. Commands have three components:
7. Communications Protocols 95
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