Delta OHM HD45 17A, Manual

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7. COMMUNICATION PROTOCOL
All models are supplied with a serial output with mini-USB connector, that allows you
to upload commands and to download data through your PC using communication
programs, such as – for example - Hyperterminal.
Connect the serial output located on the instrument side to a USB port of your PC via
the special RS45 or RS45I connection cable, which is supplied with a built-in USB
adaptor and mini-USB connector to the instrument end, and a USB connector to the
PC end. For a proper connection operation, it is necessary to install the drivers
included in the CD-ROM supplied with the instrument in your PC.
Attention: serial connection doesn’t work if the instrument is directly connected to the
PC via a standard mini-USB/USB adaptor cable.
After the connection, the instrument appears connected to a COM-type port.
Setup serial transmission parameters as follows:
• Baud rate: 115200
• Parity: None
• Data bits: 8
• Stop bits: 2
Please find below the list of configuration commands and data requests that can be
sent through a PC, with the instrument connected via mini-USB output:
Tab. 7.A: Communication protocol
Command Response Description
G0 HD… Transmitter model
G1 Vnn.nn aaaa/mm/gg Firmware version and date
G2 aaaa/mm/gg hh.mm.ss Calibration date and time
G3 nnnnnnnn Instrument serial number
G4 nnnnnnnn Relative humidity module serial
number
G5 aaaa/mm/gg hh.mm.ss
Relative humidity module factory
calibration date and time
GS Download last logging session
GT Download all logging sessions
PW nnnnnn Print number to retrieve access code
PWC nnnnnn nnnnnn & Set new “nnnnnn” access code
PWnnnnnn USER ENABLED! Upload access code and set
authorization level “1”
PWX LOCKED! Set authorization level “0”
RLnnn n
Print authorization level of parameter
number “nnn”
RPnnn
Print value of parameter number
“nnn”
S0 & Disable measurement print
S1 & Single measurement print
S2 & Enable measurement continuous print
WLnnn x &
Set authorization level of parameter
number “nnn” to “x” value
WPnnn val &
Set parameter number “nnn” to “val”
value
For the available parameter list, refer to Tab. 5.A (page 29).