Cambridge Sensotec Rapidox 1100ZR-H-PFC-E O
2
Analyser Instruction Manual
Version 1.2
5
Last printed 22/07/2015 18:08:00
7.2
The Rapidox Analyser - Menu System
All of the user-programmable functions are accessed via a menu system which is
controlled using the front panel Keypad (2). To access the menu press the ENT
button and to escape and return to the operating screen press ESC at any time.
The menu system flow chart is shown in Appendix 2 below:
7.3
Getting Started
Ensure that the Rapidox analyser is located away from extreme heat and dirt
environments. Plug the unit in to a suitable supply (noting the information on the
serial sticker and using the power cable supplied) using the rear power socket (8).
Make sure that the cooling fan (9) is not obstructed during operation.
In order for the vacuum ejector system to function this unit needs to be supplied
with compressed air using the 6mm OD / 4mm ID push on connector on the rear
Labelled “Ejector” (10). The compressed air source must be set to 2bar which will
produce a flow of 1 litre per minute. Note that that compressed air is consumed at
approximately 5 litres per minute and the waste gas is exited via the GAS OUT
fitting (4) on the rear panel. Please make sure that your compressed air source is
clean and dry; a suitable coalescing filter should be installed on the ejector inlet to
prevent and liquids or particles entering the analyser. The ejector may become
clogged if unclean gas is used.
Push the gas sample tube (6mm OD/4mm ID) to the GAS IN (3) connector and fit
the retaining collar hand tight. Repeat for the GAS OUT (4) connector should an
outlet tube be required.
If you are using the Rapidox to measure gas from a compressed source i.e. from a
gas bottle then please make sure you carefully adjust the gas regulator on the
supply cylinder to give a pressure reading on the Rapidox screen of 0-25mbar.
This will give the correct flow and pressure to allow the Rapidox to work
normally. The pressure display needs to be enabled by following the instructions
in section 7.11. Alternatively a by-pass arrangement can be used – please see
section Error! Reference source not found. for a diagram.
Turn the unit on using the red power switch on the front (5). The LCD (1) will
display the firmware version followed by the message “HEATING SENSOR”. The
sensor will take approximately four minutes to come up to temperature, after
which the Rapidox will begin to take measurements. The progress of the sensor
heater is shown in the form of a bar graph on the LCD (1). Once at temperature
the LCD display will show the oxygen reading and the pressure. The symbol AL1
or AL2 may appear to the bottom right of the LCD if the alarm system is enabled
and an alarm condition applies.
Allow thirty minutes for the box to stabilise fully. This allows the components of
the analyser to reach a stable working temperature. During this warm-up period it
is common for the baseline oxygen to drift by a small amount, which may be