TESTO REXS, User Manual

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6 Setting up and installation
22
Compressed air supply connection

Ensure that the compressed air pressure and air quality meet the requirements. Refer to
7.1, Specifications and technical data, for detailed information.

Always use appropriate gas line shutoff valves, pressure regulators and fittings.

Ensure that the mechanical dimensions (length, diameter) of the outlet port meet the
requirements. Refer to chapter 7.1, Specifications and technical data.

Ensure that the compressed air supply port is equipped with a coupling that meets the
requirements. Refer to specification, chapter 7.1, Specifications and technical data.

Adjust the compressed air supply pressure to 7 bar.

Connect the compressed air hose to the compressed air supply port. Connect the Legris
safety quick coupling to the compressed air. The inlet is located at the bottom backside,
next to the electrical main port. Refer to chapter 4.6, Back panel operational elements.

If desired, the user may connect a separate hose with Legris ISO B6 safety coupling. In
standard setup, oxidation air is supplied internally from the main compressed air line
directly to the oxidation inlet at the upper back panel. Refer to chapter 4.6, Back panel
operational elements.
Electrical connection

The one phase power cord delivered with the instrument is equipped with a country-
specific plug and protective earth.

testo REXS is designed to run either with 230 VAC or 110 VAC power supply. Refer to the
label to determine supply voltage for the instrument.

Connect the IEC 60320-C13 socket of the power cord to the IEC 60320-C14 plug at the
back side of the instrument next to the compressed air inlet.

Connect the power cord plug to a grounded power socket.
Caution:
Keep access to main switch free!
Adjust the aerosol outlet position

The burner is mounted on a movable slide. It can be lowered and raised to adapt the
vertical aerosol position to the test bench required level. To adjust the aerosol outlet
position, open the four hexagonal socket screws with a 6 mm hexagonal socket wrench
and place the burner in the desired position. Block the slide by fastening the 4 screws.
Additional accessories for the burner outlet

Parts 13 to 20 are optional parts to be connected to the burner outlet, if used. The mixer
provides improved aerosol homogeneity, the 45° or 90° elbow enables to swivel the
aerosol outlet. The T-fitting with 8 mm tube fitting provides a sampling port close to the
burner outlet.
Note:
When using the sampling port tee, consider aerosol temperature and pressure
as well as possible particle concentration inhomogeneity at the sampling point.
Warning:
Flow oscillations or pressure fluctuations at the burner outlet may lead to
pressure peaks. These pressure peaks may cause emergency shutdown of testo
REXS and/or damage of the DUT and the test bench tubing and attached
devices.
Warning:
The aerosol leaving the testo REXS burner may heat up to 300 °C. The tubing,
fittings and DUT have to be designed to withstand the aerosol temperatures that
may occur.