Reference Manual
00809-0100-4034, Rev AA
April 2019
Millennium II Basic Transmitter
Important Instructions
Net Safety Monitoring, Inc (Net Safety) designs, manufactures and tests products to function within
specific conditions. Because these products are sophisticated technical instruments, it is important
that the owner and operation personnel must strictly adhere both to the information printed on the
product nameplate and to all instructions provided in this manual prior to installation, operation, and
maintenance.
Installing, operating or maintaining a Net Safety Product improperly could lead to serious injury or
death from explosion or exposure to dangerous substances. Comply with all information on the
product, in this manual, and in any local and national codes that apply to the product. Do not allow
untrained personnel to work with this product. Use Net Safety parts and work procedures specified in
this manual.
Notice
The contents of this publication are presented for informational purposes only, and while every effort
has been made to ensure their accuracy, they are not to be construed as warranties or guarantees,
expressed or implied, regarding the products or services described herein or their use or applicability.
All sales are governed by Net Safety’s terms and conditions, which are available upon request. We
reserve the right to modify or improve the designs or specifications of such products at any time.
Net Safety does not assume responsibility for the selection, use or maintenance of any product.
Responsibility for proper selection, use and maintenance of any Net Safety products remains solely with
the purchaser and end-user.
To the best of Net Safety’s knowledge, the information herein is complete and accurate. Net Safety
makes no warranties, expressed or implied, including implied warranties of merchantability and fitness
for a particular purpose with respect to this manual and, in no event, shall Net Safety be liable for any
incidental, punitive, special or consequential damages including, but not limited to, loss of production,
loss of profits, loss of revenue or use and costs incurred including without limitation for capital, fuel and
power, and claims of third parties.
Product names used herein are for manufacturer or supplier identification only and may be
trademarks/registered trademarks of these companies.
Net Safety and the Net Safety logo are registered trademarks of Net Safety Monitoring, Inc. The
Emerson logo is a trademark and service mark of the Emerson Electric Company.
Copyright © 2019 by Rosemount, Shakopee, MN.
All rights reserved. No part of this work may be reproduced or copied in any form or by any means - graphic,
electronic, or mechanical without first receiving written permission of Rosemount, Shakopee, MN.
Warranty
1. Limited Warranty. Subject to the limitations contained in Section 10 (Limitation of Remedy
and Liability) herein, Seller warrants that (a) the licensed firmware embodied in the Goods will
execute the programming instructions provided by Seller; (b) that the Goods manufactured by
Seller will be free from defects in materials or workmanship under normal use and care; and (c)
Services will be performed by trained personnel using proper equipment and instrumentation
for the particular Service provided. The foregoing warranties will apply until the expiration of
the applicable warranty period. Sensors and detectors are warranted against defective parts
and workmanship for 24 months from the date of purchase and other electronic assemblies for
36 months from the date of purchase. Products purchased by Seller from a third party for
resale to Buyer (Resale Products) shall carry only the warranty extended by the original
manufacturer. Buyer agrees that Seller has no liability for Resale Products beyond making a
reasonable commercial effort to arrange for procurement and shipping of the Resale Products.
If Buyer discovers any warranty defects and notifies Seller thereof in writing during the
applicable warranty period, Seller shall, at its option, (i) correct any errors that are found by
Seller in the firmware or Services; (ii) repair or replace FOB point of manufacture that portion of
the Goods found by Seller to be defective; or (iii) refund the purchase price of the defective
portion of the Goods/Services. All replacements or repairs necessitated by inadequate
maintenance; normal wear and usage; unsuitable power sources or environmental conditions;
accident; misuse; improper installation; modification; repair; use of unauthorized replacement
parts; storage or handling; or any other cause not the fault of Seller, are not covered by this
limited warranty and shall be replaced or repaired at Buyer’s sole expense and Seller shall not
be obligated to pay any costs or charges incurred by Buyer or any other party except as may be
agreed upon in writing in advance by Seller. All costs of dismantling, reinstallation, freight and
the time and expenses of Seller’s personnel and representatives for site travel and diagnosis
under this limited warranty clause shall be borne by Buyer unless accepted in writing by Seller.
Goods repaired and parts replaced by Seller during the warranty period shall be in warranty for
the remainder of the original warranty period or 90 days, whichever is longer. This limited
warranty is the only warranty made by Seller and can be amended only in a writing signed by an
authorized representative of Seller. The limited warranty herein ceases to be effective if Buyer
fails to operate and use the Goods sold hereunder in a safe and reasonable manner and in
accordance with any written instructions from the manufacturers. THE WARRANTIES AND
REMEDIES SET FORTH ABOVE ARE EXCLUSIVE. THERE ARE NO REPRESENTATIONS OR
WARRANTIES OF ANY KIND, EXPRESS OR IMPLIED, AS TO MERCHANTABILITY, FITNESS FOR
PARTICULAR PURPOSE OR ANY OTHER MATTER WITH RESPECT TO ANY OF THE GOODS OR
SERVICES.
2. Limitation of Remedy and Liability. SELLER SHALL NOT BE LIABLE FOR DAMAGES CAUSED BY
DELAY IN PERFORMANCE. THE REMEDIES OF BUYER SET FORTH IN THE AGREEMENT ARE
EXCLUSIVE. IN NO EVENT, REGARDLESS OF THE FORM OF THE CLAIM OR CAUSE OF ACTION
(WHETHER BASED IN CONTRACT, INFRINGEMENT, NEGLIGENCE, STRICT LIABILITY, OTHER
TORT OR OTHERWISE), SHALL SELLER’S LIABILITY TO BUYER AND/OR BUYER’S CUSTOMERS
EXCEED THE PRICE TO BUYER OF THE SPECIFIC GOODS MANUFACTURED OR SERVICES
PROVIDED BY SELLER GIVING RISE TO THE CLAIM OR CAUSE OF ACTION. BUYER AGREES THAT
IN NO EVENT SHALL SELLER’S LIABILITY TO BUYER AND/OR BUYER’S CUSTOMERS EXTEND TO
INCLUDE INCIDENTAL, CONSEQUENTIAL OR PUNITIVE DAMAGES. THE TERM
“CONSEQUENTIAL DAMAGES” SHALL INCLUDE, BUT NOT BE LIMITED TO, LOSS OF
ANTICIPATED PROFITS, REVENUE OR USE AND COSTS INCURRED INCLUDING WITHOUT
LIMITATION FOR CAPITAL, FUEL AND POWER, AND CLAIMS OF BUYER’S CUSTOMERS.
Reference Manual Table of Contents
00809-0100-4034, Rev AA April 2019
Table of Contents i
Contents
Section 1: Introduction ...................................................................... 1
1.1 Models covered ................................................................................................................... 1
1.2 Service support ................................................................................................................... 1
1.3 Return of material ............................................................................................................... 1
1.4 Product recycling/disposal .................................................................................................. 1
Section 2: Installation ........................................................................ 2
2.1 Unpacking and inspection ................................................................................................... 2
2.2 Dimensions ......................................................................................................................... 2
2.3 Mounting ............................................................................................................................ 2
2.4 Wiring ................................................................................................................................. 3
2.4.1 General requirements ........................................................................................... 3
2.4.2 Terminal connection ............................................................................................. 3
2.4.3 Cable choice and guidelines .................................................................................. 4
2.4.4 Important wiring guidelines .................................................................................. 4
2.4.5 External ground .................................................................................................... 5
2.4.6 Seals ..................................................................................................................... 5
2.4.7 Analog output, isolated supply, non-isolated supply and jumper configuration ..... 5
2.5 Wiring drawings .................................................................................................................. 7
2.6 Remote mounting of sensor ................................................................................................ 8
2.6.1 Wiring drawings for remote sensor wiring ............................................................. 9
2.7 Installation checklist .......................................................................................................... 10
Section 3: Operation ........................................................................ 11
3.1 Transmitter and faceplate description ............................................................................... 11
3.2 Intrusive access ................................................................................................................. 11
3.3 Non-intrusive access (magnetic Reed switch Access) ......................................................... 11
Section 4: Output configurations ..................................................... 13
4.1 Analog board assembly ..................................................................................................... 13
4.2 Analog/HART board assembly ........................................................................................... 14
4.3 Relay board assembly/configuration ................................................................................. 15
4.4 Digital board assembly/configuration................................................................................ 16
Section 5: Operation ........................................................................ 17
5.1 DIP switch settings ............................................................................................................ 17
5.1.1 Infrared sensor (SC311) gas curve selection ........................................................ 17
5.1.2 Hydrogen sulfide sensor (ST320) range selection ................................................ 17
5.1.3 Carbon monoxide sensor (ST360) range selection ............................................... 18
5.1.4 DIP switch settings for relay configuration .......................................................... 18
5.1.5 Digital Modbus DIP switch settings ..................................................................... 19
5.1.6 Analog and analog/HART DIP switch settings ...................................................... 20
Section 6: Calibration procedure ...................................................... 21
6.1 Calibration procedure ....................................................................................................... 21
6.1.1 Guidelines........................................................................................................... 21
6.1.2 Full calibration procedure ................................................................................... 21
6.2 Zeroing procedure ............................................................................................................ 22
6.3 Status conditions during calibration .................................................................................. 24
6.4 Calibration failures ............................................................................................................ 24
6.5 Manual reset ..................................................................................................................... 24
Table of Contents Reference Manual
April 2019 00809-0100-4034, Rev AA
ii Table of Contents
Section 7: Monitoring and outputs .................................................. 25
7.1 Analog 4-20mA ................................................................................................................. 25
7.2 HART Communication (Optional) ...................................................................................... 25
7.2.1 HART Menu Structure ......................................................................................... 25
7.3 Relays (Optional) ............................................................................................................... 28
7.3.1 Alarm relays ........................................................................................................ 28
7.3.2 Fault relay ........................................................................................................... 28
7.4 RS-485 Modbus RTU (Optional) ......................................................................................... 28
7.4.1 Modbus registers ................................................................................................ 29
7.5 Transmitter output operation............................................................................................ 30
7.6 Fault monitoring ............................................................................................................... 31
7.7 Fault conditions ................................................................................................................ 31
7.7.1 Transmitter fault conditions ................................................................................ 31
7.7.2 Sensor fault conditions ....................................................................................... 32
Section 8: Maintenance ................................................................... 33
8.1 Periodic response check .................................................................................................... 33
8.2 Troubleshooting ............................................................................................................... 33
8.3 Storage ............................................................................................................................. 33
8.4 Spare parts and accessories ............................................................................................... 34
Section 9: Electrostatic sensitive device ........................................... 35
Section 10: Wire resistance table ....................................................... 36
Section 11: Specifications .................................................................. 37
11.1 Electrical ........................................................................................................................... 37
11.1.1 Operating voltage range ..................................................................................... 37
11.1.2 Power consumption ............................................................................................ 37
11.1.3 EMC compliance ................................................................................................. 37
11.2 Environmental................................................................................................................... 37
11.2.1 Operating temperature ...................................................................................... 37
11.2.2 Relative humidity ................................................................................................ 37
11.2.3 Ingress protection ............................................................................................... 37
11.3 Mechanical ........................................................................................................................ 38
11.3.1 Enclosure material .............................................................................................. 38
11.3.2 Conduit opening ................................................................................................. 38
11.3.3 Weight ............................................................................................................... 38
11.4 Warranty ........................................................................................................................... 38
Section 12: Certifications ................................................................... 39
12.1 North American................................................................................................................. 39
12.2 IECEx ................................................................................................................................. 39
12.3 FC Models ......................................................................................................................... 39
12.3.1 North America .................................................................................................... 39
12.3.2 IECEx .................................................................................................................. 39
Section 13: Ordering information ...................................................... 40
Reference Manual Introduction
00809-0100-4034, Rev AA April 2019
Introduction 1
Section 1: Introduction
1.1 Models covered
A Millennium II Basic gas detection system is composed of a field mounted transmitter and Millennium
II series sensors, which may be integrally mounted to the transmitter or remotely mounted.
The transmitter is certified for use in hazardous locations and is available as a single sensor system.
Some operator controls, including calibration, can be accessed without opening the enclosure
(housing) by using other communication devices and the attached magnet to actuate the reed switch.
Available outputs are: conventional 4 to 20 mA analog, analog/HART
®
, electromechanical relays, or
Modbus
®
RTU digital.
1.2 Service support
Technical support for this product can be provided by contacting your local Emerson representative or
by contacting the Technical Support department at +1 866 347 3427 (toll free) or
Safety.CSC@Emerson.com.
1.3 Return of material
To expedite the return of this product, proper communication between the customer and the factory is
important. Before returning a product, call +1 866 347 3427 (toll free) or e-mail
Safety.CSC@Emerson.com for a Return Material Authorization (RMA) number.
On the return of the equipment, include the following information:
1. RMA number provided to you by Rosemount
2. Company name and contact information
3. Ship all equipment, prepaid to:
Rosemount
6021 Innovation Boulevard
Shakopee, MN 55379
4. Mark all packages with the RMA number and type of return (e.g. return for evaluation)
Pack items to protect them from damage and use anti-static bags or aluminum-backed cardboard as
protection from electrostatic damage.
All equipment must be shipped prepaid. Collect shipments will not be accepted.
1.4 Product recycling/disposal
Recycling of equipment and packaging should be taken into consideration and disposed of in
accordance with local and national legislations/regulations.
Installation Reference Manual
April 2019 00809-0100-4034, Rev AA
2 Installation
Section 2: Installation
2.1 Unpacking and inspection
Carefully remove all of the components from the packaging and verify them against the enclosed
packing list. Inspect all components for any obvious damage such as broken or loose parts. If you find
any components missing or damaged, notify your local Net Safety representative or the factory
immediately.
2.2 Dimensions
The Millennium II Basic transmitter enclosure is available in aluminum (6061) and stainless steel
(SS316). Dimensions are provided in Figure 2-1 below.
Figure 2-1: Dimensions
A
B
C
D
E
F
G
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
Transmitter (AL)
4.8
122
3.6
91
3.6
91
4.8
122
5.1
130
0.3
7.6
3.0
76
Transmitter (SS)
4.7
119
3.6
91
3.6
91
4.7
119
5.1
130
0.3
7.6
3.2
81
2.3 Mounting
Ensure transmitter and sensor are securely mounted as per local regulations. The transmitter has
mounting holes to allow mounting to a wall or pole as desired. Mounting kit hardware is required when
mounting the transmitter a pole. Contact your local Net Safety representative for detailed information
on the pole mounting kits. The transmitter should be mounted at eye-level and be easily accessible for
monitoring and maintenance purposes.
Reference Manual Installation
00809-0100-4034, Rev AA April 2019
Installation 3
2.4 Wiring
2.4.1 General requirements
Failure to follow these installation guidelines could result in death or serious injury. Ensure that only
qualified personnel perform the installation.
Electrical shock could cause death or serious injury. Use extreme caution when making contact with
the leads and terminals.
Do not open the transmitter, sensor, or junction box enclosure when in a classified area or when an
explosive atmosphere may be present unless the power to the transmitter has been removed.
Wiring codes and regulations may vary. Wiring must comply with all applicable regulations relating to
the installation of electrical equipment in a hazardous area and is the responsibility of the installer. If in
doubt, consult a qualified official before wiring the system.
When separating the sensor from the transmitter, the use of shielded cable is highly recommended to
meet electromagnetic compatibility (EMC) requirements and to protect against interference caused by
extraneous electrical or electromagnetic noise. In applications where the wiring is installed in conduit,
the conduit must not be used for wiring to other equipment.
If the 4-20 mA signal is not used, connect a jumper between the 4 – 20 mA terminal and the common
terminal to allow analog current levels to be monitored at the test jacks on the transmitter board.
In applications where wiring is installed in conduit, conduit must not be used for wiring to any other
electrical equipment.
For effective communication, Net Safety limits sensor separation to 2000 feet (600 meters) using 16
AWG wires.
Modbus RS-485 connection 2-wire mode, multipoint serial line available. Up to 16 addresses allowed.
When developing a RS-485 chain of devices, the last device in the chain requires an end of line
termination resistor (120 Ohms).
2.4.2 Terminal connection
When connecting cable wires, use a small screwdriver to gently press down and hold the spring
connector open. Insert the appropriate wire into the open connector hole, releasing the screwdriver to
secure the wire as shown in Figure 2-2.
The connector will accommodate wire sizes between 14 and 20 AWG.
Installation Reference Manual
April 2019 00809-0100-4034, Rev AA
4 Installation
Figure 2-2 Terminal connection
2.4.3 Cable choice and guidelines
Radio frequency interference (RFI) can be caused by nearby electrical devices (e.g. transformers or high
voltage equipment) as well as handheld communication devices/radios, which when activated, may
impede the proper functioning of the transmitter and sensor. Selecting the right instrumentation cable
and making proper grounding connections within the junction box will reduce or eliminate
interference. Visible symptoms of RFI include inconsistent, incorrect, and erratic LEL and ppm readings.
2.4.4 Important wiring guidelines
Gas detection instruments are an important part of a safety alarm and shutdown system. The system is
composed of:
• Detection instruments
• Customer connected equipment
• Wiring
Net Safety designs and manufactures its detection equipment under rigid quality control management
systems and makes every effort to design for the harshest of industrial environments. The other
components of the system – the customer-connected equipment and wiring – are also important
contributors to the overall quality and performance of the safety system.
It is important to implement wiring that ensures the reliability and integrity of the safety system. Field
wiring practices and the choice of cable type specified vary from project to project. Poor practices and
choices are often found to be the source of unwanted system disruptions. RFI and electromagnetic
interference (EMI) are usually very powerful disruptive forces in industrial facilities and these forces act
upon the system through the wiring.
The cable used should be a very high quality instrument grade, certified for the application conditions,
consisting of a rugged protective outer jacket, an overall electrical shield of fine braided copper or
metallic foil, and internal pairs or triads of foil shielded copper wire of suitable gauge for the power
conducted over the specified length.
The shields must be electrically continuous from the instrument junction box through other junction
boxes and finally to the connected equipment. The shield must be connected to a suitable ground sink
as specified in the instrument manual in order to protect the system from electrical disturbances.
In general, communication cables and power cables should not run in parallel for any significant length,
and should not be carried in the same cable tray. Through inductance, high currents in power cables
can induce significant ‘noise’ in communication cables running parallel alongside power cables.
Reference Manual Installation
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Installation 5
2.4.5 External ground
In order to ensure proper operation of the sensor, an external earth ground is recommended. Net
Safety recommends that the external ground be connected to the grounding point on the enclosure.
2.4.6 Seals
The use of seals is recommended to further protect the system against water ingression, and
equipment should be installed according to applicable local electrical codes. Seals are especially
recommended for installations that use high-pressure or steam cleaning devices in proximity to the
transmitter.
• Waterproof and explosionproof conduit seals are recommended to prevent water accumulation
within the enclosure.
• Seals should be located as close to the device as possible and not more than18 in.(46 cm) away.
• Explosionproof installations may require an additional seal where conduit enters a non-hazardous
area; ensure conformity with local wiring codes.
• When pouring a seal, use a fiber dam to ensure proper formation of the seal. Seals should never be
poured at temperatures below freezing.
• The jacket and shielding of the cable should be stripped back to permit the seal to form around the
individual wires. This will prevent air particles and water leakage through the inside of the shield
and into the enclosure.
• It is recommended that explosionproof drains and conduit breathers be used. In some applications,
changes in temperature and barometric pressure can cause breathing which allows moist air to
enter and circulate inside the conduit. Joints in the conduit system are seldom tight enough to
prevent this breathing.
2.4.7 Analog output, isolated supply, non-isolated supply and jumper
configuration
The analog output may be powered from the main instrument power supply or a separate,
independent power supply, in which case an isolated wiring configuration is necessary. These
configurations only apply to analog and analog/HART
®
model transmitters.
To set a non-isolated or isolated current output, simply move the jumper/shorting jack located at JP1
near the power and output terminals, to either the non-isolated or isolated current position. For non-
isolated current output, ensure pins 3 and 2 at JP1 location on the terminal board are jumpered
(shorted). See Figure 2-3 for reference. Factory standard models ship with jumper in the non -isolated
current output position.
For isolated current output, pins 1 and 2 at JP1 should be jumpered (shorted). See Figure 2-3 for
reference.
Installation Reference Manual
April 2019 00809-0100-4034, Rev AA
6 Installation
Figure 2-3 Non-isolated and isolated current jumpers
Always ensure that JP1 jumpers are in the correct position depending on the current output
configuration chosen.
Non-isolated current output configuration (default).
Pin 3 and Pin 2 jumpered at JP1
Isolated current output configuration.
Pin 1 and Pin 2 jumpered at JP1
Reference Manual Installation
00809-0100-4034, Rev AA April 2019
Installation 7
2.5 Wiring drawings
The drawings below are general ways in wiring the system showing analog signal output. Consult
qualified personnel on specific wiring requirements.
Figure 2-4 Non-isolated terminal connection (for Analog and Analog/HART models)
Figure 2-5 Isolated terminal connection (for Analog and Analog/HART models)
Installation Reference Manual
April 2019 00809-0100-4034, Rev AA
8 Installation
2.6 Remote mounting of sensor
When necessary to mount sensor remotely (separated from transmitter) by way of junction box and
conduit, it is important that the installer follow the necessary requirements and guidelines relating to
sensor separation and cable selection. See Figure 2-6 for typical remote mounting of the sensor.
When sensors are being mounted remotely, consult the multi-purpose junction box manual
(MAN-0081) for wiring instructions. Always ensure that the transmitter is supplying 10.5 - 32 VDC
across the sensor power terminals of Net Safety junction box (JB-MPD-A/S).
The maximum distance between the sensor and transmitter is limited by the resistance of the
connecting wiring, which is a function of the gauge of the wire being used. For effective
communication, Net Safety limits the separation distance between sensor and transmitter to 2000 feet
(600 meters) using 16 AWG wire. See Section 10: for information on wire gauge and resistance.
Figure 2-6 Remote mounting of sensor
Reference Manual Installation
00809-0100-4034, Rev AA April 2019
Installation 9
2.6.1 Wiring drawings for remote sensor wiring
The drawings below are an analog output drawing showing wiring of sensor to transmitter remotely via
a junction box. Consult qualified personnel on specific wiring requirements.
Figure 2-7 Non-isolated terminal wiring with remote sensor wiring (for Analog and Analog/HART models)
Figure 2-8 Isolated terminal wiring with remote sensor wiring (for Analog and Analog/HART models)
Installation Reference Manual
April 2019 00809-0100-4034, Rev AA
10 Installation
2.7 Installation checklist
Review the following checklist prior to turning the power on to the transmitter after installation has
been completed:
□ Ensure that the transmitter and sensor are properly and firmly mounted.
□ Ensure that stopping plugs are securely tightened on any unused conduit entries.
□ Ensure that the transmitter and sensor are not obstructed; transmitter and sensor are accessible
and target gas is not inhibited from reaching the sensor.
□ Ensure adherence to applicable local guidelines and requirements on wiring and sealing of
equipment in hazardous and non-hazardous areas.
□ Ensure that proper shielding and grounding practices are adhered to and local codes are being
followed.
□ Check system operational voltage and conditions; ensuring that they are within the applicable
specifications of the transmitter and sensor.
□ Verify wiring at all termination and junction points (transmitter, junction box, and power supply).
□ Ensure that the transmitter housing cover and sensor cap are secured tightly.
Reference Manual Operation
00809-0100-4034, Rev AA April 2019
Operation 11
Section 3: Operation
3.1 Transmitter and faceplate description
After wiring is completed and power is applied, indicated by the green power LED, a warm-up routine
will begin, during which the sensor is automatically tested to ensure proper operation. The Status LED
will slowly flash red and the current output will be 3.0 mA (indicated by Analog models). Once the
warm-up routine has been completed, the LED will flash green, indicating normal operation. The time
taken for the transmitter to complete its warm-up cycle is dependent on the type of sensor being used.
Figure 3-1 Faceplate description
The transmitter faceplate shows the position of the magnetic switch, the status LED, and the status LED
states. See 0 for more information on the Status LED.
3.2 Intrusive access
Do not open the transmitter, sensor, or junction box enclosure when in a classified area or when an
explosive atmosphere may be present unless the power to the transmitter has been removed.
This involves the removal of the top cover and faceplate to access the pushbutton switch when
calibrating and resetting the transmitter. Pressing and holding the pushbutton down for up to three (3)
seconds resets the transmitter; latched alarms are cleared and sensor performed self-tests. Holding
down the pushbutton for up to fifteen (15) seconds sends the transmitter into full calibration mode.
See 6.3 for more information on calibration and manual reset.
3.3 Non-intrusive access (magnetic reed switch access)
This involves placing and holding the attached magnet next to the base of the label mount as indicated
in Figure 3-2. When the magnet is held for up to three (3) seconds, a manual reset will be initiated. If
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