Det-Tronics OPECL Infrared Hydrocarbon Gas Detector SAFETY MANUAL - Manual (Page 3)

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Common Misuse Scenarios
• Do not install the OPECL on unstable or vibration
prone structures; a 3 meter maximum height is
recommend when using a vertical post.
• Do not install the OPECL below the height of typical
human activity unless absolutely necessary in order
to prevent nuisance beam block faults.
• Do not install an OPECL receiver where multiple
transmitters are in the line of sight - this is a common
concern for pipeline system installations.
NOTE
The above common misuse scenarios will cause
the OPECL to annunciate a fault if the condition is
severe enough to compromise the safety function.
START-UP AND COMMISSIONING
Commissioning Personnel
The Safety Certified OPECL gas detector can be
commissioned by any qualified person with knowledge
of gas detection instruments and the configuration
device being used. Refer to the Start-Up, Alignment
and Calibration sections provided in the OPECL
instruction manual.
Configuration
Digital communication with the Open Path Eclipse is
necessary to monitor internal status and to modify the
factory settings. Appendix A of the OPECL instruction
manual provides guidance on establishing HART
communication, and describes the communication
menu structure when using the Open Path Eclipse with
the HART Handheld Communicator.
NOTE
Prior to device configuration (setting alarm
thresholds, latch/non-latch function, etc.) all
alarm outputs must be bypassed. The device is
not safety certified during configuration change
activities.
Relay Configuration Requirements
Only the OPECL gas detector’s High Alarm and Fault
relay outputs may be used as part of a Safety Certified
system. The end user must provide transient and
current limiting on the output contacts of the relays.
The maximum relay contact output must be limited to
5 amperes at 30 Vdc. The load must be a resistive
load. The user must protect against transients by using
standard protection methods such as proper grounding
of shielded wire and separation of relay load wires from
other lines carrying rapidly switched high current (e.g.
large motor power supply lines).
Configuration Protection
Upon completion of installation and commissioning,
it is recommended to password-protect the OPECL
programming and setup function using a HART Field
Communicator or AMS program to prevent accidental
or deliberate change of detector configuration data
during normal operation.
OPERATION, MAINTENANCE, INSPECTION AND
PROOF TESTING
All normal installation, start-up, and field calibration
recommendations as documented in the STARTUP
section of the OPECL instruction manual are applicable
to the Safety Certified OPECL gas detector.
Safety-Certified OPECL gas detectors require additional
Proof testing to be performed in all cases.
Personnel performing Proof Test procedures shall be
competent to perform the task. All proof test results
must be recorded and analyzed. Any corrective actions
taken must be documented in the event that an error is
found in the safety functionality. The Proof tests must be
performed at a frequency as shown in Table 1.
WARNING
Failure to perform the specified testing and
inspection may lower or void the SIL rating for the
product or system.
OPECL Proof Test Name Commissioning Frequency per Year
Gas Response Proof Test Yes 1
Output Response Proof Test Yes 1
Table 1—Frequency for Performing Proof Tests