Emerson Rosemount 975MR, Справочное руководство

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For further details, see the Certificate of Compliance No. UL-BR 16.065XX .
TR CU/EAC
The flame detector is in compliance with the standard TR CU 012/2011 per:
1Ex db eb op is IIC T4 Gb X
Ex tb op is IIIC T96 °C Db X
-55 °C ≤ Ta ≤ +75 °C
or
1Ex db eb op is IIC T4 Gb X
Ex tb op is IIIC T106 °C Db X
-55 °C ≤ Ta ≤ +85 °C
For more details, see TR CU certificate No. TC RU C-US M Ю 62.B05535 .
1.5 Performance considerations
1.5.1 Detection sensitivity
Detection sensitivity is the maximum distance at which the detector reliably detects a
specific size of fire and typical type of fuel (standard fire).
Standard fire
Defined as 1 ft.
2
(0.1 m
2
) n-heptane pan fire with maximum wind speed of 6.5 ft./sec
(2 m/sec).
Sensitivity ranges
The detector has four user-selectable sensitivity ranges. For each range, there are two
response levels:
•
Warning
(Pre-alarm)
•
Alarm
The detection distance for the
Warning
level is approximately 10 percent higher than the
Alarm
distance.
Alarm response times for a standard fire at a specified range are shown in Table 1-4 .
Table 1-4: Sensitivity Range Levels
Level Response time (sec) Sensitivity range - ft. (m) (for
1 ft.
2
(0.1 m
2
) n-heptane pan
fire)
1 3 50 (15)
2 default 5 100 (30)
Introduction Reference Manual
August 2019 00809-0100-4975
14 Emerson.com/Rosemount