
Cambridge Sensotec Rapidox 1100ZR-H-OL O
2
Analyser Instruction Manual
Version 1.2
17
Last printed 22/07/2015 18:02:00
This allows users who are working with fluctuating input pressures to
maintain a ‘meaningful’ reading of oxygen concentration that will only be
affected by changes in gas composition and not gas pressure.
Note that when this mode is activated the user will be asked to enter a value for
the current ambient pressure to slightly improve the accuracy of the correction.
The factory default is 1013mbar which is the average ambient pressure for the UK.
The ambient pressure at your location will depend on altitude and prevailing
weather conditions.
7.14
Setting the Baud Rate
If you are using the software for data logging you can chose the communications
speed (Baud Rate) by scrolling down the menu to no. 8 “Baud Rate” and using the
UP & DOWN arrows to select either 9600 or 57,600. Press ENT button again to
store and return to normal operation. The default factory setting is 57,600.
However if you are using an older PC you can decrease this to 9600 to improve the
reliability of the software and data communications.
7.15
RS232 / RS485 Port
It is possible to factory set the data communications port to either RS232 or
RS485. Once configured at the factory it is not possible to change unless the unit
is returned to Cambridge Sensotec Ltd. Data from the Rapidox is sent on demand
to the 9-way 'D' type socket (8) on the rear panel and can be read using a simple
terminal programme such as 'HyperTerminal' in Windows, or with the user's own
custom software. Alternatively a simple and convenient data logger programme is
included with the supplied software and is described in section 9 below.
7.15.1
RS232 Protocol
Oxygen data can be read from the RS232 port at the back of the Rapidox. The
default RS232 configuration is 57600-8-N-1, as shown in this example for COM1:
Figure 7: Rapidox default COM properties box