Det-Tronics PIRECL Infrared Hydrocarbon Gas Detector PointWatch Eclipse - Manual (Page 21)

19 95-8526 14.2
faUlt inDiCation
There are three modes of signaling faults using the 4-20
mA analog signal output:
Eclipse (Factory default setting for units
manufactured after 1/1/2014)
PIR9400 (Used for retrofit applications of the
PIR9400 detector. Factory default setting
for units manufactured before 1/1/2014)
user Defined
Fault signaling mode can be selected using the HART or
MODBUS interface. Table 3 shows the current levels for
each fault mode.
eclipse fault Mode
Eclipse mode follows conventional fault signaling practice.
The current loop output indicates the presence of a fault,
but does not attempt to identify a specific fault with a
specific current output value. Identification of a specific
fault type is done through the HART Communicator or
MODBUS.
pir9400 fault Mode
This mode is provided for compatibility with existing
Det-Tronics PointWatch gas detectors. The fault and
calibration levels are identical to existing PIR9400 units,
which makes the Eclipse compatible with the U9500
Infiniti Transmitter. As with the PIR9400 detector, live
and suppressed “signal during calibration” modes are
available.
User Defined fault Mode
This mode is intended for users who wish to program
unique current levels for faults and calibration signals.
User defined current levels can be set from 0.0 to 24.0
mA. and can be programmed from HART or MODBUS
interfaces. Four unique current levels are available:
warm-up, general fault, calibration, and blocked optics.
table 3—output Levels of 4-20 ma Current Loop and Corresponding Status Indications
Condition eclipse fault Mode pir9400 fault Mode User Defined fault Mode
Gas Level (-10% to 102.2% Full scale) 2.4 to 20.5 2.4 to 20.5 2.4 to 20.5
Warm-up 1.00 0.00 Warm-up
Reference Sensor Saturated 1.00 0.20 General Fault
Active Sensor Saturated 1.00 0.40 General Fault
Calibration line active on power-up 1.00 0.60 General Fault
Low 24 volts 1.00 0.80 General Fault
Low 12 volts 1.00 1.20 General Fault
Low 5 volts 1.00 1.20 General Fault
Dirty Optics 2.00 1.00 Blocked Optics
Calibration Fault 1.00 1.60 General Fault
Calibration complete 1.00 1.80 Calibration
Span calibration, apply gas 1.00 2.00 Calibration
Zero calibration in progress 1.00 2.20 Calibration
Negative signal output fault 1.00 2.40 General Fault
Flash CRC 1.00 1.20 General Fault
Ram Error 1.00 1.20 General Fault
EEPROM Error 1.00 1.20 General Fault
IR Source Failure 1.00 1.20 General Fault