Autronica AutoPath HC800 User manual

Instruc ons
Line of Sight Infrared Hydrocarbon Gas Detector
AutroPath HC800
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

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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
APPLICATION ...................................1
OPERATION OVERVIEW. . . . . . . . . . . . . . . . . . . . . . . . . . .2
Theory of Operation .............................2
Detectable Gases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Detection Ranges ...............................2
Standard Output ................................2
Optional Relays.................................4
Optional Communication Link . . . . . . . . . . . . . . . . . . . . . .4
History Logs ...................................4
OPERATION.....................................5
Internal Magnetic Switch/Calibration Line Terminal...5
Module Identication.............................5
Factory Reset Command . . . . . . . . . . . . . . . . . . . . . . . . .5
Operating Modes ...............................5
4-20 mA Current Loop Output. . . . . . . . . . . . . . . . . . . . . .6
Heater Control..................................7
Status and Fault Indication . . . . . . . . . . . . . . . . . . . . . . . 10
SPECIFICATIONS ...............................10
IMPORTANT SAFETY NOTES. . . . . . . . . . . . . . . . . . . . . .14
INSTALLATION..................................14
Identication of Vapor(s) to be Detected . . . . . . . . . . . . .14
System Location Considerations. . . . . . . . . . . . . . . . . . .14
Module Mounting Recommendations . . . . . . . . . . . . . . .16
Replacing an Existing Model HC600 with an HC800 ...18
24 Vdc Power Supply Requirements. . . . . . . . . . . . . . . . 18
Wiring Cable Requirements . . . . . . . . . . . . . . . . . . . . . .18
Power Wiring Size and Maximum Length ............19
Optional Relays................................19
Wiring Procedure...............................19
STARTUP ......................................22
ALIGNMENT....................................22
Overview .....................................22
Equipment Required ............................23
Alignment Procedure............................23
Aperture Kit for Short Range Applications ...........25
Recommendations for using the
HART Field Communicator . . . . . . . . . . . . . . . . . . . . . . .26
Gain Level Check ..............................26
Transmitter Lamp Voltage ........................27
CALIBRATION ..................................27
Calibration Overview............................27
Zero Calibration................................27
Important Calibration Notes . . . . . . . . . . . . . . . . . . . . . .27
Calibration Initiation ............................28
Calibration Sequence ...........................28
MAINTENANCE .................................29
Routine Inspection .............................29
Optics Cleaning................................29
Functional Checking ............................29
Protective Caps and Covers . . . . . . . . . . . . . . . . . . . . . .29
TROUBLESHOOTING ............................30
REPLACING HC800 TRANSMITTER/
RECEIVER ELECTRONICS MODULE . . . . . . . . . . . . . . .30
Module Replacement Procedure. . . . . . . . . . . . . . . . . . .31
DEVICE REPAIR AND RETURN . . . . . . . . . . . . . . . . . . . .32
ORDERING INFORMATION . . . . . . . . . . . . . . . . . . . . . . .33
Alignment Equipment ...........................33
Accessories...................................33
Spare Parts ...................................33
Assistance....................................33
APPENDIX A - ATEX APPROVAL DESCRIPTION........35
APPENDIX B - IECEx APPROVAL DESCRIPTION ....... 38
APPENDIX C - ADDITIONAL APPROVALS ............40
APPENDIX D - HART COMMUNICATION .............41
Table of Contents

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

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 1
IMPORTANT
Be sure to read and understand the entire
instruction manual before installing or operating
the gas detection system. This product is
intended to provide early warning of the presence
of a ammable or explosive gas mixture. Proper
device installation, operation, and maintenance is
required to ensure safe and effective operation.
application
The Model AutroPath HC800 is a line of sight infrared gas
detection system that provides continuous monitoring
of combustible hydrocarbon gas concentrations in the
range of 0 to 5 LFL-meters, over a distance of 5 to 120
meters. Standard system outputs include an electrically
isolated/non-isolated 4–20 mA dc current output with
the ability to go below 4 mA to indicate fault conditions,
and also HART and RS-485 Modbus communication.
Alarm and fault relays are available as an option.
The system consists of two stainless steel modules —
a transmitter and a receiver, along with mounting and
alignment bracket. The receiver provides the measurement
signal outputs, and is furnished with onboard “status
indication” LEDs and an internal magnetic calibration
switch. The transmitter houses a high quality xenon
flash lamp and “status indication” LEDs. Both modules
are powered from an external 24 volt DC supply
and
are equipped with microprocessor controlled heated
optics to increase resistance to moisture and ice.
Both
modules must be installed at approximately the same
elevation and must be aligned to point directly at one
another. No direct electrical interconnection between the
two modules is required.
The AutroPath HC800 is certified explosion-proof for
use in zone 2, category 3 hazardous areas, and holds
third party performance certification for Methane,
Butane, and Propane gas detection. It can be used
as a stand-alone detector, or as part of a larger facility
protection system using other Autronica Fire and
Security equipment.
INSTRUCTIONS
Line of Sight
Infrared Hydrocarbon Gas Detector
Model AutroPath HC800

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 2
opERation ovERviEw
THEORY OF OPERATION
The AutroPath HC800 transmitter module uses a Xenon
flash lamp to produce a collimated IR light source. This
light source illuminates the path between transmitter
and receiver. The transmitter uses a filter to block
visible light emissions and is eye safe.
As flammable hydrocarbon gases intersect the light
beam between the two modules, certain IR wavelengths
are absorbed by the gas, while other IR wavelengths
are not. The amount of IR absorption is determined by
the concentration of the hydrocarbon gas. A pair of
optical detectors and associated electronics located
in the receiver module measure the absorption. The
change in intensity of the absorbed light (active
signal) is measured relative to the intensity of light at
a non-absorbed wavelength (reference signal). The
microprocessor computes the gas concentration and
converts the value into a 4–20 mA current output signal,
which is then communicated to external control and
annunciation systems.
The gas concentration is indicated by a 4–20 mA
signal, which corresponds to 0-5 LFL-meters. To better
understand the concept of LFL-meters, refer to Figure
1, which shows how three gas clouds of different size
and concentration would produce the same output of
1 LFL-meter by the line of sight gas detection system.
To convert a given LFL-m value to ppm-m for methane,
propane, or butane gas, refer to Table 1.
DETECTABLE GASES
The AutroPath HC800 is capable of detecting most
hydrocarbon gases and vapors including methane,
propane, and butane. Gas type and other operational
parameters are selected via HART or Modbus
communication. The AutroPath HC800 is factory
calibrated to methane, propane, and butane, and
comes from the factory set for methane. For detection of
gases other than the three selection settings (methane,
propane, and butane), performance characteristics /
transfer curves are available. Please contact the factory
for details.
DETECTION RANGES
The AutroPath HC800 is offered in two detection ranges
in order to meet customer needs, as listed below:
Short Range 5–60 meters
Long Range 30–120 meters
For installations with short separation distances (5-15
meters for the short range model and 30-40 meters for
the long range model), the range reduction aperture kit
(supplied) is required. Refer to “Aperture Kit for Short
Range Applications” section in this manual for details.
The correct range for the AutroPath HC800 must
be chosen to meet specific application needs. The
detection range of the AutroPath HC800 pair is
determined by the Receiver. Receiver units can be
converted from long to short or short to long range
in the field by replacing the front electronics module.
A single transmitter model is used for both detection
range options.
STANDARD OUTPUT
The
AutroPath HC800
receiver module provides an analog
4
–
20 mA signal output. HART and RS-485 Modbus serial
communication are available at either module.
The 4–20
mA current loop corresponding to 0–5 LFL-meters is
provided for connection to analog input devices such
as gas controllers, logic controllers, or distributed
control systems (DCS). To convert the mA reading to
LFL-meters, use the following formula:
mA Reading –4
X 5 =LFL-Meters
16
Figure 1—Detector Response to Three Gas Clouds
of Different Size and Concentration
1M @ 100% LFL = 1 LFL-M
2M @ 50% LFL = 1 LFL-M
10M @ 10% LFL = 1 LFL-M
HC800 OUTPUT EQUALS 1 LFL-M IN ALL THREE SCENARIOS
A2665

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 3
Gas Path Length (m)
Cloud
Concentration
(LFL)
Cloud
Concentration (v/v, by
volume)
Cloud
Concentration
(ppm)
LFL-m ppm-m
Methane 1100% 5.0% 50000 150000
Methane 2100% 5.0% 50000 2100000
Methane 3100% 5.0% 50000 3150000
Methane 4100% 5.0% 50000 4200000
Methane 5100% 5.0% 50000 5250000
Propane 1100% 2.2% 22000 122000
Propane 2100% 2.2% 22000 244000
Propane 3100% 2.2% 22000 366000
Propane 4100% 2.2% 22000 488000
Propane 5100% 2.2% 22000 5110000
Butane 1100% 1.9% 19000 119000
Butane 2100% 1.9% 19000 238000
Butane 3100% 1.9% 19000 357000
Butane 4100% 1.9% 19000 476000
Butane 5100% 1.9% 19000 595000
Table 1—LFL-m to PPM-m Conversion

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 4
OPTIONAL RELAYS
The AutroPath HC800 can be furnished with factory
installed relays — two programmable alarm relay
outputs and one fault relay output. All relays are sealed
and provide form C (NO/NC) contacts. The high and
low alarm relays are programmable, and can be set
for latching / non-latching operation, and a normally
energized / de-energized coil (see Table 3). The low
alarm cannot be set above the high alarm threshold.
Alarm configuration can be done with the HART or
Modbus interface. The onboard multi-color LEDs
indicate a LOW alarm condition via a flashing red
color, and a HIGH alarm condition via a steady red
color. Latched alarms can be reset using the internal
magnetic switch, an external switch connected to the
calibration line terminal, a HART Field Communicator,
or Modbus communication. A short-duration magnetic
switch activation of one second will reset latched
alarms. Holding the magnetic switch closed for a three
second duration will start the calibration sequence.
When the optional relays are ordered, the AutroPath
HC800 receiver is certified for Ex d operation.
OPTIONAL COMMUNICATION LINK
By connecting the transmitter and receiver via a three-
wire shielded cable, an optional “communication link”
can be created between the two devices.
The communication link offers the following advantages:
1. Single point system diagnostics – The link offers
the ability to view device variables of the receiver
while connected to the transmitter, or vice versa
(using a HART handheld or Modbus device).
These variables include signal strength, status,
and configuration parameters such as alarm set
points, heater settings, gas type, etc.
2. Dynamic lamp power – The link enables the sys-
tem to optimize lamp power per the application.
This optimization only happens during the zero
calibration process.
3. Synchronized LEDs on each device can signal a
common system status condition. Without the link,
the transmitter is unable to signal alarm status.
4. Transmitter variables can be configured via con-
nection to the receiver. Configurable transmitter
variables include lamp power and heater settings.
NOTE
Alarm setpoints in the receiver cannot be changed
from the transmitter.
5. The communication link provides the ability to
initiate Calibration from either the transmitter or
receiver.
For retrofit applications where an inter-connecting wire
is not available or possible, the system can operate
without the link. If the link is not connected, the system
will not indicate a “link fault.”
A “link fault” feature can be enabled (using a HART
handheld or Modbus device), which will indicate a fault
if the link is broken. The “link fault” can only be detected
and annunciated by the receiver.
NOTE
The default setting for the ”link fault” feature is
Disabled.
NOTE
All third-party performance and hazardous
location approvals apply with and without the
communication link connected.
HISTORY LOGS
Non-volatile memory is provided in the receiver to save
a record of the 100 most recent calibrations and 1000
most recent alarm/fault events. Operating temperature
and voltage of the receiver are also recorded with
each event log. A real time clock is provided for time
stamping events. This information is accessible using
HART or Modbus communication.

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
opER ation
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

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 6
Warm-up
Warm-up mode is entered upon application of 24 Vdc
operating power. During warm-up, the 0-20 mA current
loop output will indicate warm-up, the indicating LED
is yellow, and the alarm outputs are disabled. The
warm-up time typically lasts from 15 to 150 seconds,
depending upon alignment accuracy.
Normal
After warm-up mode is completed, the device
automatically enters the Normal mode, and all analog
and alarm outputs are enabled. The AutroPath HC800
modules must be properly aligned before normal
operation is attained. See “Installation” section for
details.
Calibrate
After alignment is completed, zero calibration is
required. Span calibration of the AutroPath HC800 is
performed at the factory; however, the user has the
option to verify proper calibration if necessary. It is
recommended that the zero calibration procedure be
performed annually. Refer to the “Calibration” section
in this manual for details.
4-20 mA Current Loop output
The AutroPath HC800 provides a linear current loop
output that is proportional to the detected gas level.
Fault and calibration status are also indicated by this
output.
The full-scale output corresponding to 5 LFL-meters
is 20 mA. HART and Modbus interfaces also have the
ability to calibrate (trim) the 4 mA and 20 mA levels.
The AutroPath HC800 is equipped with output
monitoring circuitry for the current loop and will indicate
a fault when the output mA level does not match the
output set point of the device. This monitoring (disabled
by default) will indicate a fault if the current loop is not
terminated correctly. The loop monitoring feature can
be enabled via HART or Modbus communication.
Figure 3— Identication of Transmitter and Receiver Modules
TRANSMITTER RECEIVER
A2647
Default Congurable Options
Gas Type Methane Methane, Propane, Butane
Low Alarm
Threshold
( L F L- M )
10.5 to 4.5
(10% to 90%)
High Alarm
Threshold
( L F L- M )
30.5 to 4.5
(10% to 90%)
High & Low
Alarm Relays
(
Optional
)
Non-Latching,
De-Energized
Latching/Non-Latching,
Energized/De-Energized
Beam Block
Delay 60 Seconds 60–3600 Seconds
Fault Mode AutroPath HC800 AutroPath HC800, Advanced,
User Defined
Heater Mode* Smart Mode Smart Mode, Always On,
Always Off
*See "Heater Control" section for details.
NOTE:
The system must be configured for less than 60% of the full
scale measuring range, with consideration to the accepted gas
cloud size and concentration.
Table 3—Factory Default Settings

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 7
HEATER CONTROL
The AutroPath HC800 optics in both transmitter
and receiver are heated to provide moisture and
ice resistance. These heaters are microprocessor
controlled and can be configured to operate in the
following modes:
– Always On
– Always Off
– Smart Mode (default)
1) Heaters maintain a user programmable temperature
set point (default = 50°C).
2) Heaters increase to full power when signal strength
is degraded due to moisture or condensation on the
window, or any obscuration faults are active.
3) Heaters shut off when the input voltage drops below
a user defined level (default = 18.5 Vdc).
4) Heater power usage can be limited from 0-100%
(default uses up to 100% power if needed). See
Specifications section for power consumption
details.
Table 6 indicates the typical window glass temperature
rise for various heater setting and ambient temperature
combinations.
NOTE
Higher heater settings reduce or eliminate
moisture buildup on the window, thereby
providing optimum detector performance.
AutroPath HC800 Window
Temperature Rise (C)
AMBIENT TEMPERATURE
-55°C -40°C 0°C 25°C
30%
Heater
Setting
Receiver 5.1 5.3 4.5 3.0
Transmitter 4.2 4.1 4.2 3.0
50%
Heater
Setting
Receiver 7.2 6.8 7.0 5.0
Transmitter 5.3 5.2 5.3 3.6
70%
Heater
Setting
Receiver 9.8 9.1 7.5 7.1
Transmitter 7.8 6.6 5.1 3.8
100%
Heater
Setting
Receiver 15.8 14.9 8.6 7.3
Transmitter 13.3 10.6 5.9 4.5
Table 5—Typical AutroPath HC800 Window Temperature Rise (Degrees C)
for Various Heater Settings and Ambient Temperatures
Table 4—AutroPath HC800 Receiver Status Conditions
Status
4–20 mA Output Relays
LED
AutroPath
HC800 De-
fault
Advanced User
Dened Fault Relay Alarm Relay
Warm up 1.0 1.0 Detection
Disabled De-energized Disabled Yellow - Solid
Normal 4.0 to 20.5 4.0 to 20.5 4.0 to 20.5 Energized Enabled
Green - Solid = Normal
Red - Flashing = Low Alarm
Red - Solid = High Alarm
Zero
Calibration 1.0 2.2 Configuration Energized Disabled Yellow - Flashing @ 5 Hz
Note: When the Communication Link is used, the transmitter LED operation matches receiver LED operation, including alarm status.

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 8
Status
4-20mA Output Relays
LED
Default Advanced User
Dened Fault Relay Alarm Relay
4-20 Fault
(Open Loop) 0.0 0.0 0.0 De-energized Enabled Yellow - Solid for 10 seconds, followed
by 1 Pulse
RAM Fault 1.0 1.2 Detection
Disabled De-energized Disabled Yellow - Solid
Data Flash Fault 1.0 1.2 Detection
Disabled De-energized Disabled Yellow - Solid
Flash CRC Fault 1.0 1.2 Detection
Disabled De-energized Disabled Yellow - Solid
AFE Fault 1.0 1.2 Detection
Disabled De-energized Disabled Yellow - Solid
Internal Voltage Fault 1.0 1.2 Detection
Disabled De-energized Disabled Yellow - Solid
Active Signal Saturated 1.0 1.2 Detection
Disabled De-energized Disabled Yellow - Solid
Ref. Signal
Saturated 1.0 1.2 Detection
Disabled De-energized Disabled Yellow - Solid
Low Voltage 1.0 1.4 Advisory De-energized Enabled Yellow - Solid for 10 seconds, followed
by 2 Pulses
High Voltage 1.0 2.0 Advisory De-energized Enabled Yellow - Solid for 10 seconds, followed
by 8 Pulses
Heater Fault 1.0 1.6 Advisory De-energized Enabled Yellow - Solid for 10 seconds, followed
by 3 Pulses
Broken Link 1.0 1.8 Advisory De-energized Enabled Yellow - Solid for 10 seconds, followed
by 4 Pulses
Failed Zero
Calibration 1.0 2.4 Advisory De-energized Enabled Yellow - Solid for 10 seconds, followed
by 5 Pulses
Calibrate
Active at Startup 1.0 2.6 Advisory De-energized Enabled Yellow - Solid for 10 seconds, followed
by 6 Pulses
Beam Block 2.0 2.8 Detection
Disabled De-energized Disabled Yellow - Solid for 10 seconds, followed
by 7 Pulses
Low Signal 3.0 3.2 Advisory De-energized Enabled Yellow - Solid for 10 seconds, followed
by 9 Pulses
Negative Drift
–9% of Scale 1.0 3.6 Advisory De-energized Enabled Yellow - Solid for 10 seconds, followed
by 10 Pulses
Over Range 20.5 20.5 20.5 Energized Enabled Red - Solid
Table 6—AutroPath HC800 Receiver Fault Conditions

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 9
Status Condition Recommended Action
4-20 Fault
(Open Loop)
The 4-20 mA output loop is not functioning properly;
the output mA level does not match the output set
point of the device.
Check field wiring, termination points, and resistance of the 4-20
mA loop. Ensure that the 4-20 mA output terminal of the AutroPath
HC800 Receiver is connected to ground through an appropriate
sized load (see instruction manual for details).
RAM Fault System RAM test failed. Cycle power to the unit. (If problem does not clear, return to
factory.)
Data Flash
Fault
Data can no longer be read/written to flash memory
inside the processor.
Cycle power to the unit. (If problem does not clear, return to
factory.)
Flash CRC
Fault
Non-Volatile Memory Operation Failed. Cycle power to the unit. (If problem does not clear, return to
factory.)
AFE Fault Receiver gain circuit failed. Cycle power to the unit. (If problem does not clear, return to
factory.)
Internal
Voltage Fault
Internal step-down power supply out of range condi-
tion.
Cycle power to the unit. (If problem does not clear, return to
factory.)
Active Signal
Saturated
Active sensor is receiving too much light intensity
from transmitter.
1. For installation with module separation distances between
5 and 40 meters, the range reduction aperture kit (supplied) is
required.
2. Transmitter lamp voltage should be lowered to reduce signal to
receiver.
Ref. Signal
Saturated
Reference sensor is receiving too much light intensity
from transmitter.
1. For installation with module separation distances between
5 and 40 meters, the range reduction aperture kit (supplied) is
required.
2. Transmitter lamp voltage should be lowered to reduce signal to
receiver.
Low Voltage Supply voltage to AutroPath HC800 is less than 16V. Supply voltage needs to rise above 16V. Check supply voltage
and power wiring.
High Voltage Supply voltage to AutroPath HC800 is greater than
33V.
Supply voltage needs to drop below 33V. Check supply voltage
and power wiring.
Heater Fault Heater is not working. Fault will clear if heater is configured to be off. If heater is required,
return to factory for repair.
Broken Link If communication link is being used, communication
has been lost between receiver and transmitter.
(Annunciation of this status condition is configurable
and is disabled by default.)
Check field wiring and ensure that the Rx/TX communication link
lines are connected as specified in the instruction manual. Return
unit to factory if problem persists.
Failed Zero
Calibration
This fault will persist through power cycle until a suc-
cessful calibration is completed; calibration will time
out at 10 minutes
If the calibration process is allowed to time out, the fault is set and
can only be reset with a successful calibration.
Calibrate
Active
at Startup
Zero calibration line is pulled low during power up,
resulting in a Zero Calibration active during power-
up.
1. Check receiver wiring to verify any wired connection to terminal
6 (Reset/Cal) is not connected to ground.
2. Upon power-up of the unit, make sure a magnet is not
positioned very close to the receiver bulkhead area where
magnetic switch resides.
Beam Block The receiver doesn’t see the light signal from the
transmitter continuously for 1 minute or the time set
by user (Min 1 minute, Max 6 hours, default 1 minute)
1. Clear beam obstruction.
2. Check alignment and re-align if necessary.
Low Signal Indicated when the received light intensity is below
30% of full scale at gain 100
1. Clean windows of receiver and transmitter.
2. Check alignment and re-align if necessary.
Negative Drift
–9% of Scale
A constant under range condition where the gas
reading is at or below –10% of full scale reading for
a period of one minute or more. (Gas detection is still
enabled, but output reading will be lower than actual
gas concentration applied.)
1. Zero calibration in clean air environment.
2. Dense fog may be in beam path.
Over Range Overange condition is indicated by a steady 20.5 mA
output, as this is maximum gas concentration that
will be displayed.
Gas is likely present in high concentration; react accordingly.
Table 6—AutroPath HC800 Receiver Fault Conditions (Continued)

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 10
STATUS AND FAULT INDICATION
Status and fault conditions are indicated using the 4–20
mA analog signal output. Signaling modes include two
predefined modes, and a user defined mode for third
party compatibility. The user defined mode allows users
to define a mA output level (range 1.0 - 3.6 mA) for
each of the three status / fault categories: configuration,
advisory, and detection disabled. Refer to Table 4 for
status indications and Table 5 for fault conditions.
Status and fault indication configuration options can
be changed via HART or Modbus communication.
(Refer to the “Troubleshooting” section for additional
information regarding fault identification.)
NOTE
Transmitter warm-up and fault conditions are
indicated by a solid yellow LED, and diagnostics
can be performed using HART or Modbus
communication. The receiver will continue to
perform its safety function, and will indicate
a fault status if normal operation has been
compromised.
If a transmitter fault occurs, perform normal
maintenance and ensure correct input voltage
at the device. If normal operation cannot be
restored, return the device to the factory.
SpEcificationS
OPERATING VOLTAGE (Both Modules)—
24 Vdc nominal. Operating range is 18 to 30 Vdc.
Ripple cannot exceed 0.5 volts P-P.
POWER CONSUMPTION—
Power Consumption (Watts)
Transmitter
Maximum
Receiver
Maximum
@ 24
VDC
Total Unit,
No Heaters
or Relays
6.5 2.6
30% Heater Only 1.4 1.1
50% Heater Only 2.5 2.0
70% Heater Only 3.5 2.7
100% Heater Only 4.2 3.3
Relay Only N/A 1.2
Total Unit, Max 10.7 7. 2
@ 30
VDC
Total Unit,
No Heaters
or Relays
6.5 2.9
30% Heater Only 2.3 1.8
50% Heater Only 4.2 3 .1
70% Heater Only 5.9 4.2
100% Heater Only 7. 2 5.1
Relay Only N/A 1.2
Total Unit, Max 13.7 9.3
@ 33
VDC* Total Unit, Max 16.0 10.0
* Per regulatory approval requirements, the unit power consumption was
measured at 33 VDC input voltage
(10% above claimed range) and results listed on the product label.
TRANSMITTER LAMP—
Xenon flashlamp, field-replaceable module
(10 yr warranty).
WARMUP TIME—
15 seconds minimum, 150 seconds maximum from
power-up, depending upon alignment accuracy.
CURRENT OUTPUT—
Linear 4–20 mA (isolated/non-isolated) rated at 600
ohms maximum loop resistance @ 24 Vdc operating
voltage, with the ability to go below 4 mA to indicate a
fault condition.

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 11
RELAY OUTPUTS (Optional)—
Available on Ex d approved models only.
ALARM RELAYS—
Low and High
Form C Type (NO/NC). De-Energized during Normal
mode, Energized on Alarm.
Contact Rating: 3 amperes at 30 Vdc.
Programmable for Latching or Non-Latching Operation.
Low Alarm: 0.5 to 4.5 LFL-meters
(default = 1 LFL-meters, Non-latching).
High Alarm: 0.5 to 4.5 LFL-meters
(default = 3 LFL-meters, Non-latching).
Alarm relays are programmable using HART or Modbus
communication.
CAUTION
When the AutroPath HC800 Gas Detector is
used in conjunction with an appropriate certied
Control Unit and congured for a non-latching
high alarm, the control unit must always latch and
require a deliberate manual action to clear a high
gas alarm. When used as a stand alone device,
the high alarm must always be programmed for
latching operation.
FAULT RELAY—
Form C Type (NO/NC).
Energized during Normal mode, De-Energized on
Fault or loss of power.
Contact Rating: 3 amperes at 30 VDC.
Non-Latching Operation only — not programmable.
VISUAL STATUS INDICATOR—
LEDs – Transmitter:
Red = Low alarm, high alarm*
Green = Power on / OK
Yellow = Fault / warm-up / calibration*.
*Communication link required for low / high alarm and
calibration indication.
LEDs – Receiver:
Red = Low alarm, high alarm
Green = Power on / OK
Yellow = Fault / warm-up / calibration.
See Tables 4 and 5 for details.
AVAILABLE GAS SETTINGS—
Third party performance approved to Methane, Butane,
and Propane.
DETECTION RANGE—
Short Range 5-60 meters
Long Range 30-120 meters.
Note: It may be necessary to add the aperture (supplied)
to the transmitter when operating at the lower 10-15
meters of each range.
MISALIGNMENT TOLERANCE—
±0.8 degree minimum (~±56cm @ 40m; ~±168cm @
120m). The AutroPath HC800 is third party verified
to maintain specified accuracy within the entire 0.8
degree field of view for both Receiver and Transmitter.
Note: The receiver has a circular field of view. The
transmitter has an oval shaped field of view with a
minimum 0.8 degree tolerance along the horizontal axis
and a minimum 1.5 degree tolerance along the vertical
axis (
Manufacturer
v e r i fi e d ) .
CALIBRATION—
AutroPath HC800 systems are span calibrated for
methane, propane, and butane at the factory. Span
calibration in the field is not required.
Zero calibration is accomplished in the field by one of
the following methods:
– On-board magnetic reed switch
– Modbus communication
– HART communication
– External calibration switch.
RESPONSE TIME—
Refer to the appropriate Approval/Certification
Appendix for details.
ACCURACY—
Refer to the appropriate Approval/Certification
Appendix for details. Accuracy specification applies
to full operating temperature, humidity, and pressure
ranges listed, unless noted otherwise.
NOTE
Misalignment will cause the manufacturer stated
Accuracy limits to increase, but remain within the
limits of EN 60079-29-4 and IEC 60079-29-4.

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 12
TEMPERATURE RANGE—
Operating: –55°C to +75°C (–67°F to +167°F)
Relay version: –55°C to +65°C (–67°F to +149°F)
Storage: –55°C to +85°C (–67°F to +185°F)
Hazardous Locations: Refer to the appropriate
Approval/Certification
Appendix for correct ambient
temperature range.
HUMIDITY—
5 to 99% relative humidity; designed for outdoor
applications.
OPERATING PRESSURE—
91.5 - 105.5 kPA non-compensated.
MEASUREMENT RANGE—
0–5 LFL-meters.
Note: A Negative Zero Drift fault is indicated at –9% of
full scale.
INTERFERENCE RESISTANCE—
Immune to sun and flare radiation, tested to
800 ±50 W/m2at ≥ 3° to optical axis and common
contaminants.
SELF-DIAGNOSTIC TEST—
Fail-Safe operation ensured by performing all critical
tests once per second.
MODULE HOUSING MATERIAL—
316 stainless steel (CF8M).
CONDUIT ENTRY OPTIONS—
3/4 inch NPT or M25, with two entries for transmitter and
four entries for receiver.
OPTICS PROTECTION—
Microprocessor controlled heated optics mitigate
against ice and dew formation. Brow provides a degree
of protection against windblown dirt and rain. See
“Mounting Instructions” for brow installation procedure.
INGRESS PROTECTION—
NEMA Type 4X certified,
IP66/67 (Manufacturer verified).
WIRING—
Field wiring screw terminals are UL/CSA rated for up
to 14 AWG shielded wire, and are DIN/VDE rated for
2.5 mm2wire. Screw terminal required torque range is
3.5–4.4 lb.-in. (0.4-0.5 N•m).
The receiver can be wired using 3 or 4 wires. The
transmitter requires two wires (power only). The use of
shielded wiring is recommended.
Field wiring for supply connection must be rated to
95°C (203°F).
CERTIFICATION—
For complete approval details, refer to the appropriate
Appendix:
Appendix A- ATEX
Appendix B - IECEx
Appendix C - Additional Approvals
DIMENSIONS—
See Figure 4 for dimensions of the transmitter and
Figure 5 for dimensions of the receiver.
MOUNTING & ALIGNMENT BRACKET ADJUSTMENT
RANGE—
±12 degrees from center, both vertical and horizontal.
WARRANTY—
5 year limited warranty.
10 year warranty on IR source.
SHIPPING WEIGHT—
Transmitter and receiver with mounting hardware:
85 pounds (38 kg)
Replacement Transmitter: 23 lbs (10.4 kg)
Replacement Receiver: 20 lbs (9 kg)
Transmitter Electronics Module: 10.4 lbs (4.7 kg)
Receiver Electronics Module: 7.8 lbs (3.6 kg)

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 13
16.1
(40.8)
10.8
(27.5)
7. 3
(18.5)
7. 0
(17.8)
7. 5
(19.1)
5.0
(12.7)
5.0
(12.7)
A2659
Figure 4—Mounted Dimensions of AutroPath HC800 Transmitter
in Inches (cm)
5.0
(12.7)
5.0
(12.7)
14.3
(36.3)
10.8
(27.5)
8.1
(20.6)
7. 9
(20.1) 7. 0
(17.9)
A2660
Figure 5—Mounted Dimensions of AutroPath HC800 Receiver
in Inches (cm)

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 14
iMpoRtant SafEtY notES
CAUTION
The wiring procedures in this manual are intended
to ensure proper functioning of the system under
normal conditions. However, because of the
many variations in wiring codes and regulations,
total compliance to these ordinances cannot be
guaranteed. Be certain that all wiring complies
with the NEC as well as all local ordinances. If
in doubt, consult the authority having jurisdiction
before wiring the system. Installation must be
done by a properly trained person.
CAUTION
This product has been tested and approved
for use in hazardous areas. However, it must
be properly installed and used only under the
conditions specied within this manual and
the specic approval certicates. Any device
modication, improper installation, or use in a
faulty or incomplete conguration will render
warranty and product certications invalid.
CAUTION
The system contains no user serviceable internal
components. Service or repair should never be
attempted by the user. Device repair should be
performed only by the manufacturer or trained
service personnel.
LIABILITIES
The manufacturer’s warranty for this product is
void, and all liability for proper function of the
system is irrevocably transferred to the owner or
operator in the event that printed circuit boards
are removed or the device is serviced or repaired
by personnel not employed or authorized by
manufacturer, or if the system is used in a manner
not conforming to its intended use.
CAUTION
Observe precautions for handling electrostatic
sensitive devices.
NOTE
The AutroPath HC800 is intended for detection
of hydrocarbon vapors only. The device will not
detect hydrogen gas.
NOTE
The terminal compartment for AutroPath HC800
without relays is designed for either an increased
safety “e” termination or a ameproof “d”
termination of the supply cable. If a ameproof
connection is chosen, then an ATEX certied
cable entry device must be used. The AutroPath
HC800 with relays requires Ex d cable entry
devices only.
inStallation
IDentIFICAtIon oF VApor(S) to Be DeteCteD
It is necessary to identify the flammable vapor(s) of
interest at the job site in order to determine the proper
calibration gas setting for the AutroPath HC800. In
addition, the physical and fire hazard properties
of the vapor, such as vapor density and flashpoint
should be identified and used to assist in selecting the
optimum detector mounting locations within the area.
The detector must be installed by qualified personnel
only, following local electrical equipment installation
practices.
SYSTEM LOCATION CONSIDERATIONS
The AutroPath HC800 system is designed for
installation in hazardous industrial areas. Each module
is normally installed using a solid vertical steel post or
flat surface mounting adapter to support the weight of
the module. The modules must be strategically located
so that the hydrocarbon vapor(s) to be detected will
intersect the light beam generated by the transmitter
module. Dispersion characteristics and behavior of the
vapor cloud resulting from a gas leak can be difficult to
estimate due to the significant number of variables that
exist at different applications. Identification of expected
gas leakage source(s), leak scenario identification,
determination of prevailing wind direction, and onsite
leak simulation are the steps generally recommended
to provide the most accurate means of identifying
optimum system installation locations.
In all cases, the beam path and surrounding area
should be kept free of obstructions that could block
the infrared beam or hinder the free movement of air
within the area. A clear beam path of 20 cm diameter or
greater is required. The system is immune to the effects
of exposure to both direct and reflected sunlight.

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 15
Avoid installation in areas with obstructions such as
steam vents and plumes, smoke stacks and chimneys,
walkways and personnel areas, splash and sprayed
water, parking, loading, cranes, vehicle-related areas
such as bus stops, road junctions, and vegetation such
as trees, shrubs, grass etc.
Contact Autronica Fire and Security if guidance on
optimum installation locations is required. Additional
guidance on the positioning of gas detectors for
optimum coverage is contained in BS6959 and other
national codes. Consult these codes of practice when
determining where detectors are to be located.
Consideration of the following system location
guidelines is also recommended. Routine maintenance
is recommended after abnormal events.
Module Separation Distance
The transmitter and receiver modules must be installed
directly facing each other across the area to be
protected. Physical obstructions in the direct line of sight
between the modules are not permitted. The overall
line of sight distance between the modules must not fall
outside the specified operating distance range (refer to
the “Specifications” section of this manual for details).
Multiple System Installations
If multiple
AutroPath HC800
systems are to be installed,
ensure that each receiver can view only the intended
transmitter. For fence line applications, the recommended
order is Tx-Rx, Rx-Tx, Tx-Rx, etc. as shown in Figure 6.
For redundant systems, spacing between units should
be a minimum of 3 ft (1 meter) and the receiver should
be set back from the transmitter a minimum of 12 inches
(30 cm) as shown in Figure 7.
System Mounting Elevation
In all cases, the modules should be installed at the same
elevation above grade to ensure that alignment capability
and foul weather performance are not compromised.
For detection of lighter than air vapors such as methane,
installation of modules at approximately 2 meters above
grade minimizes typical beam block conditions due to
human activities, while enabling satisfactory detection
capability. For detection of heavier than air vapors,
installation of detectors below the expected leakage source
is generally recommended unless nuisance beam blocks
will occur at an unacceptable rate. In this case, identification
and analysis of application specific conditions should be
completed to determine the optimum installation elevation.
Sources of Heavy Contamination
Avoid locations where high levels of contaminants will
persistently be blown onto the detector windows. Potential
sources of heavy contamination include generator / turbine
exhausts, flare stacks, drilling equipment, process vents /
chimneys, etc. If sources of heavy contamination cannot be
avoided, consider fitting extra shielding and/or providing
good access for routine cleaning.
LED Visibility
Whenever possible, select a mounting orientation where
the status indication LED is visible to personnel within the
area.
The AutroPath HC800 provides the option to turn off
the Green LED in the Normal mode when no alarms or
faults are occurring. When configured for OFF mode,
the green LED will turn OFF after a specified period of
time. The default is 60 seconds, with a selectable range
from 30 to 600 seconds.
Do NOT expect the LED to turn off immediately after
changing the setting. Also note that momentary closure
of the magnetic switch, fault clear, and alarm clear
will reset the OFF mode timer, and the green LED will
remain lit for the selected time delay period.
This option is selected from the “Gen Configuration” screen
using HART communication.
A2692
Tx Tx TxRx Rx Rx
HAZARDOUS
AREA
PREVAILING
WINDS
LIGHT INDUSTRIAL / RESIDENTIAL AREA
Figure 6—Proper Order of Modules for a
Multiple System Installation Figure 7—HC800 Systems in Redundant Conguration
B2696
Tx Rx
Tx
Rx
RECEIVER SET BACK
12 INCHES (30 CM)
FROM TRANSMITTER
HC800 SYSTEMS
SEPARATED BY MINIMUM
3 FEET (1 METER)
LATERALLY

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 16
Snow and Ice in Ambients Below –20°C
The heated optics on both modules will melt snow or
ice on the windows in ambient temperatures down to
approximately –20°C. Below this temperature, snow
or ice blown onto the window will not be melted until
the ambient temperature rises. If long term outdoor
operation in very cold climates is intended, extra
shielding / covers are recommended to prevent
accumulation of snow and ice on the windows.
Deluge and Flooding
The modules are rated IP66/IP67 and will not be damaged
by occasional deluge or flooding. However, during such
an event, the unit will completely lose it’s IR signal and will
enter the “Beam-Block / Fault” state. In addition, when
the deluge / flooding subsides, there is the possibility
that contaminants will be left on the windows. Install the
modules away from areas prone to deluge or flooding.
Areas Prone to Subsidence and Settling
Avoid installation of the modules in areas where
problems with subsidence, settling or thawing of
permafrost can occur or cause significant movement.
If such locations cannot be avoided, the foundations
of the mounting structure should be engineered to
minimize any angular movements between the receiver
and transmitter.”
Areas Prone to Earthquakes
In the event of an earthquake, there is a chance that the
modules will become misaligned with respect to each
other. As long as the modules do not suffer from direct
mechanical impact damage during an earthquake,
they should remain undamaged by such events. After
an earthquake, it is recommended that the system
alignment be checked. Anti-vibration mounts are
unlikely to be of any benefit and are not recommended.
Misalignment by Accidental Impact
Locations where there is a significant likelihood of
equipment, personnel or moving objects accidentally
knocking the modules out of alignment should be
avoided where possible. If such locations cannot be
avoided, measures including improved mechanical
protection and warning notices should be considered.
MODULE MOUNTING RECOMMENDATIONS
AutroPath HC800
modules must be affixed to a solid,
non-vibrating structure capable of supporting a minimum of
100 lbs (46 kg), located within the system’s rated separation
distance.
A building wall, a heavy steel I-beam, or nearly any
type of masonry typically provides the most rigid
mounting surface available. However, avoid the use of
wood structures or supports if the possibility of warping
exists.
When using a vertical post, the post must be absolutely
stable and without vibration. Square stock pole is
recommended. Mounting height should not exceed 3
meters.
The post can be set into the ground or attached to
a secure surface. If a post is set into the ground, the
portion below grade should be set in concrete at least
1 meter deep.
IMPORTANT
In all cases, consider whether additional bracing or
support is needed to ensure the structural integrity
of the module installation. See Figure 8. Remember
that accurate module alignment is essential for
proper performance of a line of sight gas detection
system. Movement may have a detrimental effect
on alignment. This is especially true for installations
with signicant module separation distances.
Module mounting options include:
• A vertical or horizontal post with a nominal outside
diameter of 4.5” (11.43 cm). Acceptable outside
diameter range is 4” to 4 5/8” (10.16 to 11.75 cm).
See Figure 8.
• For flat surface mounting, refer to Figure 10.
NOTE
Anti-seize material (provided) must be applied
to the U-bolt threads at the time of installation to
prevent galling.
NOTE
To ease installation and future removal, all
threaded covers, stopping plugs, and thread
adapters must be installed using thread lubricant.
See “Ordering Information” for part number —
avoid the use of silicone grease. For devices with
NPT threads, Teon tape or thread seal lubricant
must be used for enhanced sealing capability. A
minimum torque of 20 foot-pounds is required to
maintain ingress protection. To maintain the IP or
NEMA ratings when using NPT stopping plugs,
one to three wraps of Teon tape is required.
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