Instructions
UM-0085-B09 DT80 Range User Manual Page 20
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Switch On!
When power is connected, you should observe:
• the LCD backlight switches on (DT80/ 85), and the green Power LED starts flashing
• a brief clicking sound as the unit performs an initial self-calibration
• DT80 restarted / Power loss is displayed on the LCD
• the front panel LEDs flash a few times then the red Attn LED continues to flash.
The DT80 is warning you that its power has been interrupted. Press any of the front panel keys to clear this indication.
The Attn LED should stop flashing and the display should now read: DT80 V9.20 / No current job. This indicates
that:
• the version of DT80 firmware in use is "9.20" (this number may vary), and
• no user program (or "job") has been loaded
The DT80 is now idle and waiting for instructions.
Connecting to a Host Computer
In order to program the DT80, it is generally necessary to connect it to a "host" computer. The easiest option here is to
use the supplied USB cable, or, for the DT82E/82I, the supplied Ethernet cable. Other options are to use a "null-modem"
(cross-over) RS232 cable, or to connect the logger to an Ethernet network. See Communications (P182) for more details
of the different communications options.
Very briefly, connecting the DT80 via USB involves the following steps:
1. Install the supplied DtUsb driver software. This allows you to access to DT80's network services via a USB
connection.
2. Connect the USB cable between the DT80 and the PC.
3. The Windows "New Hardware Found" wizard will then run automatically (if required) to complete the installation
of the necessary drivers.
4. Your default web browser will then be launched automatically and the dEX home page will be displayed.
To connect to the DT80 using Ethernet:
1. Connect the Ethernet cable between the DT80 and the PC, or between the DT80 and a socket on your
computer's local area network.
2. Use the DT80 keypad to scroll down to the "Ethernet" screen. Check that a valid IP address is displayed, e.g.
169.254.3.202
3. Launch your web browser and type the logger's IP address into the address bar. The dEX home page should
be displayed.
The above is only a brief overview. See USB Port (P187) for detailed, step by step instructions.
As an alternative to the dEX web-based interface, you can also install the supplied DeTransfer software, which can be
used to send the text-based commands described in this manual to the logger. DeTransfer can operate over a direct
RS232/ USB connection or a network connection, and will work with any logger model.
The remainder of this manual will assume you have successfully established a connection between the host PC and the
DT80.
Sending Commands
The DT80 is programmed by sending it textual commands. These commands may be either:
• manually entered (using DeTransfer, or the Command screen in dEX), or
• generated by the dEX configuration builder, based on details entered using its graphical user interface controls.
Commands are executed by the DT80 only after it receives a carriage-return character (↵).
Commands are not case-sensitive; that is, they may be entered using either uppercase or lowercase characters.
In this manual all commands are shown in UPPERCASE. Responses from the DT80 are shown like this.
After receiving a command, the DT80 will normally echo the command, after converting it to uppercase. After a command
has been processed, the DT80 will normally indicate that it is ready for the next one by transmitting a prompt string,
such as:
DT80>
Note: the DT80 does not echo each character as it is received.
Command echo and the prompt string can be turned off if required using the /e switch command, see Switches (P262).
The maximum length of a command is 1023 characters.