Det-Tronics PIRECL Infrared Hydrocarbon Gas Detector PointWatch Eclipse - Manual (Page 4)

2 95-8526 14.2
DeteCtable gaSeS
Eclipse is capable of detecting many hydrocarbon
gases and vapors. Refer to the Specifications section
of this manual for details.
oUtpUtS
Standard
The standard version provides an isolated/non-isolated
4-20 mA current loop for connection to analog input
devices.
optional relays
An optional relay output board providing two
programmable alarm relay outputs and one fault
relay output can be factory installed with the standard
version. All relays are sealed and provide form C (NO/
NC) contacts. The high and low alarm relay settings are
programmable and can be set for latching or non-latching
operation. The low alarm cannot be set above the high
alarm threshold. Alarm configuration can be done with
the HART or MODBUS interface. The onboard multicolor
LED indicates a LOW alarm condition via a flashing red
color, and a HIGH alarm condition via a steady red color.
The Eclipse internal magnetic switch or HART Field
Communicator can be used to reset latched alarms. A
short-duration magnetic switch activation of 1 second
will reset latched alarms. Holding the magnetic switch
closed for 2 seconds will start the calibration sequence.
The external calibration line will not reset latched alarm
relays.
When the optional relay output board is specified, the
PIRECL’s approval rating is Ex d only.
NOTE
Refer to “Alarm Relays” in the Specifications
section of this manual for important information
regarding alarm relays.
eQp Version
The Eagle Quantum Premier model provides proprietary
digital signals that are compatible with the EQ Premier
network (LON) only. No analog 4-20 mA or RS-485
MODBUS signal outputs are provided. The optional
onboard HART communication port is operational,
but is not recommended for programming use. All
programming of the EQP PIRECL detector should be
accomplished using the S3 point configuration software.
Refer to the EQP Appendix within this manual for
additional information.
Data logging Capability
Non-volatile memory is provided to save the 10 most
recent calibrations, alarm/fault events, and minimum/
maximum operating temperature history. An hour meter
(running operational hours since startup) is provided to
record operating service time and to give an indication
of the relative time between events. This information is
accessible using HART, MODBUS communication, or
EQP system software.
optional thirD party aDDreSSable MoDUleS
The PIRECL is electrically compatible with third party
addressable modules, provided the module fits within
the PIRECL wiring compartment. Whenever a third party
addressable module is installed, the PIRECL’s Ex e rating
and FM Approval are void, and only the Ex d rating is valid.
Installation of a third party addressable module requires a
specially labeled PIRECL model to ensure valid product
approvals.
SIGNAL PROCESSING
ELECTRONICS
GAS
CONCENTRATION
(LEL)
IR SOURCE
IR TRANSPARENT
WINDOW
OPTICAL
BEAM SPLITTER
MEASUREMENT
SIGNAL DETECTOR
REFERENCE
SIGNAL DETECTOR
OPTICAL
FILTERS
PERMEABLE
GAS CELL
SAPPHIRE
MIRROR
Figure 1—Measurement Scheme for Infrared Gas Detector