Line of Sight Infrared Hydrocarbon Gas Detector AutroPath HC800 , 116-P-HC800/IGB, Rev. A, 2016-03-03
P/N 95-8744, v4.2 , rev. 3/16
Autronica Fire and Security AS
Page 5
opERation
INteRNAL mAGNetIC SwItCH / CALIBRAtIoN LINe teR
-
mINAL
An internal magnetic switch is provided for resetting
latched alarms and initiating field zero calibration.
See Figure 2 for switch location. The same functions
can be accomplished remotely by installing a switch
(momentary closure) between the CAL and 0V COM
terminals on the AutroPath HC800 receiver. Momentary
switch activation will reset alarms, while holding the
switch closed for three seconds or longer (not to
exceed 30 seconds) will start the calibration sequence.
The LEDs will begin flashing green (5 Hz) when the
reset criteria have been met and will change to flashing
yellow (5 Hz) when the calibration period has been met
(>3 seconds, <30 seconds). The device will reset if the
switch is released during a flashing green LED and
will enter calibration if the switch is released during a
flashing yellow LED.
moDuLe IDeNtIFICAtIoN
See Figure 3 for identification of the transmitter and receiver
modules. The functional and electrical characteristic
differences of the two devices are described in Table 2.
FACtoRy ReSet CommAND
The AutroPath HC800 provides a factory reset
command that sets all user configurable parameters
back to their default settings. This command can be
accessed via HART or Modbus communication.
oPeRAtING moDeS
The AutroPath HC800 has three operating modes:
warm-up, normal (measuring / monitoring), and
calibrate.
table 2—Functional and Electrical comparison of transmitter and Receiver
Characteristic
Transmitter
Receiver
Functional Description
Contains a xenon flash lamp, and
generates optical energy to enable
hydrocarbon detection.
Contains opto-electronics, signal processing, output
drivers, and diagnostic electronics.
Electrical Connections
Connections for power, HART, RS-485,
Communication Link.
Connections for power, 4-20 mA, HART, RS-485, relay
contacts (optional), Communication Link, and calibration/
reset.
Onboard LED Indicators
Indicates device status.
Green indicates normal operation.
Yellow indicates fault condition.
When the Communication Link is used,
the transmitter LED operation matches
receiver LED operation, including alarm
status.
Indicates normal, alarm, fault, and calibration status.
Green indicates normal operation. Blinking red indicates
low gas alarm condition.
Steady red indicates high gas alarm condition.
Yellow indicates system fault. See
Tables 4 and 5 for
details.
LED operation for fault status is non-latching. LED
operation for gas alarms is configurable for latching/non-
latching.
Magnetic Calibration Switch
(See Figure 2 for switch
location.)
N/A
Momentary activation provides reset function for latched
alarm outputs. Activation for longer than 3 seconds will
initiate zero calibration.
Adjustable Settings
Programmable IR signal intensity and
heater operation. HART or Modbus
communication is required to change the
factory default settings.
Factory calibrated for methane, propane, and butane, 0-5
LFL-meters full scale. Default gas depends on model.
See Table 3 for receiver factory default settings. HART or
Modbus communication is required to change the factory
default settings.
PLACE CALIBRATION MAGNET HERE
TO ACTIVATE INTERNAL REED SWITCH
A2648
Figure 2—location of internal Magnetic Switch
on Receiver Module
