Oldham SharpEye NP40IGB, User Manual, Page: 12 / 50

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1.4.5.3 SIL-2 Approved
The 40/40I Flame Detector is certified to SIL-2 requirement per IEC 61508.4, Chapter
3.5.12.
The alert condition according to SIL-2 can be implemented by:
•
Alert signal via 0-20mA current loop.
or
•
Alert signal via alarm relay and fault relay.
•
For more details and guidelines for configuring, installing, operating and service – see
SIL-2 Features on page 48 and TÜV Report No. 968/EZ326.00/008.
1.4.5.4 EN54-10
The 40/40I Flame Detector is certified to EN54-10 and CPD.
•
The detector has been tested and approved per EN54-10 by LPCB (BRE, UK).
•
This test includes functional test, environmental test, EMI/EMC test and software
check.
•
For more details see EN54-10 Report No. TE243256.
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).
1.5.1.1 Standard Fire
Defined as a 1ft
2
/ 0.1m
2
n-heptane, with maximum wind speed of 6.5 ft/sec (2 m/sec).
1.5.1.2 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% higher than the
ALARM distance.
Alarm response times for a standard fire at a specified range are shown figure 2
Table 2: Sensitivity Range Levels
Level Response Time (sec) Sensitivity Range - ft (m)
1 3 50 (15)
2 Default 5 100 (30)
3 8 150 (45)
4 10 215 (65)
For some typical ambient conditions the Zeta parameter as de fined in NFPA 72 for the
detector is 0.005 (1/meter).
Note
: Zeta parameters may vary significantly with changes in temperature, air pressure,
humidity, visibility conditions, and so on.