GasTech D-Guard2, Operator'S Manual, Page: 19 / 77

D-Guard
2
16
9.2. General Installation Practices
Before starting the installation process, read this operational manual thoroughly, making particular note to any
aspects that could affect the reliability or accuracy of D-Guard
2
. It is essential that the operational specifications
for the instrument are understood in relation to compatibility with the rest of the system.
Refer to Appendix C for information regarding sensor basics, chemical compatibility and cross-sensitivity.

D-Guard
2
should be installed in a location allowing easy access for repairs, adjustments and
calibration. The mounting position must allow visibility to the certification markings on the
identification plate.

Mount the instrument in a position that will minimise the risk of mechanical damage.

Ensure that the gas entry port is clear of obstruction which would prevent the passage of gas into the
internal detector cell.

Prevent water and dust accumulation from affecting operation by mounting the sensor unit with the
gas entry port pointing forwards or downward. Do not install the instrument with the gas entry port
facing upwards as this may allow the collection of water or dust to prevent gas entering the sensor.

Do not leave the splash-guard unfitted as this will allow water and dust to collect directly on the
sensor surface filter.

It is important to ensure that any cable entry points to the enclosure are watertight by properly
tightening up the cable entry grip.

If cable glands are to be substituted, they must be replaced by types suitable for the hazardous
location and must be both IP66 and IP68 ingress protected.
9.3. Detector Dimensions and Mounting Orientation
Ideal position Operationally acceptable positions (although the display is difficult to read)
(Recommended)

Do NOT Mount this way