OZONE ANALYZER BMT 965 Manual, Rev. 01/2024
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It is very important to wait for confirmation from the BMT 965 once a command is sent. Link-
Mode is started by sending the following command:
*0#DL4EBY
The BMT 965 responds with
*0#DL7ZN
The User-Mode described above is now deactivated. In order to zero the instrument, the proper
Link-Mode command has to be used. The BMT 965 contains a Link-Mode timer. Timeout can be
set by a Link-Mode command. This timer is reset by the sending of Link-Mode commands suc-
cessfully to the BMT 965. The instrument will fall back into User-Mode automatically, if this timer
runs out due to Link-Mode commands not being received.
Caution: If the BMT 965 is connected to a programmable component (a PC or a PLC) care has
to be taken that the program does not reconfigure the BMT 965 in an endless loop. The internal
non-volatile memory will only tolerate a limited (4,000,000) number of write cycles. Reading com-
mands can be used infinitely.
A detailed description of Link-Mode commands can be found inAppendix A. The Windows appli-
cation BMT 965 Link uses Link Mode and is provided with each analyser.
9 File Operations and the USB Interface
With its internal 8 GB SD card and a Full Speed USB interface supporting device and host mode,
the BMT 965 offers various possibilities of logging data, sharing data and upgrading. All methods
described in the following sections except Upgrade do not interrupt measurement of ozone. While
the instrument is connected to a Windows PC or smartphone, logging to the internal SD card is
halted because the external device takes control of the SD card’s file system. Logging continues as
soon as the USB cable is disconnected. Two USB cables can be found in the instrument accessories:
a short USB host adapter, and a longer USB cable.
Connecting a Windows Computer to the BMT 965
When the BMT 965 is connected to a Windows computer via USB for the first time, Windows will
configure itself, and then will offer to open a new external USB drive in Windows Explorer. The
root folder can contain the following files:
- <Serial number>_Clog.965 Time stamped concentration log
- <Serial number>_Evt.965 Event log
- <Serial number>_Err.965 Error log
- <Serial number>_Dia.965 Diagnostic file
- <Serial number>_Clog.csv Time stamped Excel-CSV concentration log
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