Det-Tronics PIRECL Infrared Hydrocarbon Gas Detector PointWatch Eclipse - Manual (Page 6)

4 95-8526 14.2
FauLt RELaY—
Form C Type (NO/NC). Energized during Normal mode,
De-Energized on Fault or loss of power.
Contact Rating: 5 amperes at 30 Vdc.
Non-Latching Operation only — not programmable.
DIGItaL outPut (optional)—
Digital communication, transformer isolated (78.5 kbps).
CaLIBRatIon—
All units are factory set and calibrated to the customer’s
choice of methane, propane, ethylene, or butane.
Field programming and full calibration are typically
required for detection of vapors other than the factory-
calibrated gas. Refer to the “Calibration” section of this
manual for details.
Routine calibration of the PIRECL after completion of initial
commissioning is supported, but not absolutely required.
Generally, an annual gas bump test or full calibration will
ensure proper sensitivity and response.
NOTE
Frequent visual inspections of the PIRECL are
recommended to confirm that there are no external
impediments to proper detection capability.
Four methods of initiating Calibration are supported:
– On-Board magnetic reed switch
– HART communication
– Remote calibration line for remote switch
– MODBUS communication
RESPonSE tIME—
Refer to the appropriate Appendix for details.
VIBRatIon—
PIRECL successfully passes Sinusoidal Vibration
Testing in accordance with MIL-STD-810C, Method
514.2, Paragraph 4.5.1.3, Figure 514.2-7 Curve AW, and
C22.2 No. 152-M1984, and also DET NORSKE VERITAS
Certification Notes – No. 2.4 dated May 1995.
aCCuRaCY—
±3% LFL from 0 to 50% LFL, ±5% LFL from 51 to 100% LFL
(at room ambient temperature, +23°C).
SELF-DIaGnoStIC tESt—
Fail-Safe operation ensured by performing all critical
tests once per second.
InGRESS PRotECtIon—
IP66/IP67 (DEMKO Verified).
DEtECtoR HouSInG MatERIaL—
316 stainless steel (CF8M).
ConDuIt EntRY oPtIonS—
Two entries, 3/4 inch NPT or 25 mm.
HaRt CoMMunICatIon PoRt (optional)—
Intrinsically safe. For live maintenance, follow Control
Drawing 007283-001 in Appendix J.
oPtICS PRotECtIon—
The three-layer weather baffle assembly is UV-resistant,
static-dissipating black Polythalimide plastic. The
standard weather baffle version, recommended for most
outdoor and indoor applications, includes an internal
hydrophobic filter. The standard weather baffle includes
a 3/16” (4.8mm) barb fitting for attaching a 3/16” I.D.
hose during calibration.
Two replacement weather baffles with special calibration
gas openings are available:
• 1/16” internally threaded calibration gas opening to
enable the user to install a threaded compression
fitting (not supplied) into the baffle for use with plastic
or metal tubing (007529-xxx Direct Duct compatible)
• 7/16-20 externally threaded calibration gas opening
for use with the PIRECL sample draw cup assembly
(007378-001).
Heated optics minimize condensation to ensure reliable
operation through temperature extremes.
WIRInG—
Field wiring screw terminals are UL/CSA rated for up to
14 AWG wire, and are DIN/VDE rated for 2.5 mm 2 wire.
Screw terminal required torque range is 3.5–4.4 in.-lbs.
(0.4-0.5 N·m).