Det-Tronics OPECL Infrared Hydrocarbon Gas Detector SAFETY MANUAL - Manual (Page 5)

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OUTPUT RESPONSE PROOF TEST
NOTE
The requirements for the Output Response Proof
Test can be waived for the 4-20 mA output if
a successful Gas Response Proof Test was
completed using the 4-20 mA output during the
required time frame. Details must be recorded in
the SIS logbook.
4-20 mA Output Model
1. Inhibit alarm response at the control device.
2. Use a HART handheld communicator to perform a
Loop Test function at 20 mA, or place a Gas Test
Cell or an Optical Test Film into the detector light
beam (refer to Gas Test Cell Method and Optical
Test Film Method sections above). Verify correct
output at the control device.
3. Remove the gas test cell or optical test film, if
necessary, and re-activate alarm response at the
control device.
Relay Output Models
The following should be performed to verify correct
alarm and trouble relay activation.
Fault Relay
1. Inhibit fault response at the control device.
2. Completely block the light beam with a solid object
such as a piece of cardboard until a beam block
fault is generated. Verify correct change of state at
the control device.
3. Re-activate fault response at the control device.
Alarm Relays
1. Inhibit alarm response at the control device.
2. Temporarily configure the High Alarm relay to 1
LFL-meter; then place a High Range gas test cell or
optical test film into the light beam (refer to Gas Test
Cell Method and Optical Test Film Method sections
above). Verify correct change of state at the control
device.
3. Remove the gas test cell or optical test film to return
the high alarm relay to its original state. Return
configuration of the High Alarm relay to the original
value. Re-activate alarm response at the control
device.
FAULT/FAILURE ACTION PLAN
In the event that a Calibration does not result in
acceptable Gas Response Proof test, then the standard
Maintenance, Troubleshooting, and Device Repair and
Return procedures as listed in the OPECL instruction
manual must be followed. Any failure to successfully
complete the Gas Response Proof Test must be
recorded and documented in the SIS logbook and
reported to the manufacturer.
PRODUCT REPAIR
The OPECL transmitter and receiver electronics
modules can be replaced in the field as listed in the
Replacing OPECL Transmitter/Receiver Electronics
Module section of the OPECL instruction manual. Any
internal device repairs other than electronics module
replacement must be conducted at the factory. No
firmware changes are permitted or authorized. All
failures detected by the internal diagnostics or by the
Proof Test must be reported to the manufacturer.
OPERATING, ENVIRONMENTAL, AND
PERFORMANCE SPECIFICATIONS
The operating temperature range for the Safety Certified
OPECL is –40°C to +60°C. The Safety-Certified
OPECL product versions fully comply with, and must
be operated in accordance with, the other functional,
environmental (including EMC considerations), and
performance specifications provided in the OPECL
instruction manual. A 24 hour mean time to repair
should be assumed for safety availability calculations.
SPARE PARTS
Refer to “Spare Parts” in the OPECL instruction manual.
Safety Certification is based on a sufficient number of
spares to achieve a 24 hour mean time to repair.