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Manual
00809-0100-4925
3
Installation
3.1
Safety messages
Instructions in this section may require special precautions to ensure the safety of
personnel performing the operations.
WARNING
Follow installation guidelines
Failure to follow these installation guidelines could result in death or serious injury.
Ensure that only qualified personnel perform the installation.
WARNING
If the equipment is used in a manner not specified by the manufacturer, the protection
provided by the equipment may be impaired.
WARNING
Explosions
Before connecting a handheld communication device in an explosive atmosphere, ensure
that the instruments are installed in accordance with Intrinsically Safe or non-incendive
field wiring practices.
Verify that the operating atmosphere of the transmitter is consistent with the appropriate
hazardous locations certifications.
When connecting an external device to the Rosemount 925FGD's discrete output in a
hazardous area, ensure that the external device is installed in accordance with Intrinsically
Safe or non-incendive field wiring practices.
3.2
Rosemount 625ND non-dispersive infrared
sensor effectiveness
•
When installing the Rosemount 925 FGD Gas Detector with a Rosemount 625ND
Non-dispersive Infrared Sensor, it is required the sensor be mounted in a vertical
configuration with the IP filter pointed downward.
•
When mapping a gas detection system, it should be understood that gas must
physically pass through the IP filter and the integral sinter to reach the sensor.
Therefore, the "field of view" or detection distance of a non-dispersive infrared sensor is
limited to the immediate vicinity surrounding the sensor.
•
The IP filter and sinter should always be kept free of debris and should be subject to
regular scheduled maintenance to clear any obstructions.
•
When mounting the sensor, installation height should be determined by considering a
combination of the following: height most suitable to the safety of personnel on site
as well as the correlation of target gas specific gravity compared to the surrounding
Rosemount 925FGD
Installation
March 2023
9
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