ROOTECH Accura 2350-GAS User manual

Notice
Accura 2350-GAS User Guide
Page 2
ⓒ 2014 Rootech Inc. All Rights Reserved
Notice
Symbols
Caution
Indicates the presence of dangerous voltage which can cause severe injury or
death if proper precautions are not followed.
Caution
Alerts users of the presence of hazards which can cause injury to persons, property
damage or damage to the device if proper precautions are not followed.
Note
Indicates major instructions for the installation, operation, and maintenance of the
product.
Indicates alternative voltage or current.
Indicates direct voltage or current.
Installation Considerations
The installation, operation, and maintenance of the product should be performed only by qualified,
competent personnel that have received appropriate training for high voltage and current devices.
Caution
If hazardous voltages are mishandled while installing and operating the product in the field,
it can cause serious injury or death.
During normal operation of the product, hazardous voltages are present on the terminals that connect
PTs/CTs, digital inputs, power, and external I/O circuits. The PT/CT secondary can produce lethal voltage or
current caused by the energy of the primary.
Standard safety precautions should be followed during the installation and maintenance of the product,
including removing PT fuses and shorting CT secondaries.
Install the product in enclosures or a similar cabinet to prevent access to the terminal strips of the product
after wiring.

Accura 2350-GAS User Guide
Notice
ⓒ 2014 Rootech Inc. All Rights Reserved
Page 3
About the Manual
Rootech, Inc. reserves the right to make changes in the product specifications shown in this User Guide
without prior notice. We recommend that customers should obtain the latest information on product
specifications and the manual before making orders.
In the absence of written agreements, Rootech, Inc. assumes no liability for applications assistance,
customer’s system design, or infringement of patents or copyrights induced by third parties arising from
the use of the products described herein.
We endeavor to provide accurate information in the document. However, we are not responsible for any
errors which may appear here and reserves the right to make changes without prior notice.
Limitation of Liability
Where applicable law allows and does not prohibit or restrict such limitation, Rootech, Inc’s liability for
this product shall be limited to the amount actually paid by customers for the product.

Warranty
Accura 2350-GAS User Guide
Page 4
ⓒ 2014 Rootech Inc. All Rights Reserved
Warranty
Rootech Inc. provides warrants for two years from the product receipt date only to the original purchaser
of the products and software that are sold or licensed by the company.
To obtain warranty service, the purchased products should be free from serious defects in material and
workmanship.
The software is provided in an up-to-date version, thus we do not offer any warranty for the software
product.
In order to make a product claim under the warranties described above, the original purchaser should
immediately contact Rootech headquarters. Upon receiving claims, Rootech will check out the product
either at where the purchaser is or at the company after receiving the product from the customer, who is
responsible for the cost of shipping the product. After inspecting the product, we will provide repair or
replacement services for the product.
Rootech will decide at its discretion whether to repair or replace it or give a refund for the product for
when the warranty period for the product expired or issues related to the product are not applicable for
warranty terms and conditions.
Limitation of Warranty
The Warranty does not apply to uninterrupted or error-free operation of the product or cover normal wear
and tear of the product or costs caused by the removal, installation, or troubleshooting of the customer's
electrical systems.
Defects caused by any of the following factors are not covered under the warranty.
◼Improper use(alteration, accident, misuse, abuse) or failure to act in accordance with installation,
operation or maintenance instructions
◼Unauthorized modifications, changes or repair attempts
◼Failure to comply with applicable safety standards & regulations
◼Damages coming from when transporting or storing the product
◼Damages caused by the force majeure event, including fire, flood, earthquakes, storm damage,
overvoltage & lightning
◼If the original identification marks(trade-mark, serial number, etc.) have been defaced, altered, or
removed
Rootech shall not be liable for any other claims except the claims made by customers, including the
original purchaser, his employees, agents, or contractors for any loss, damage, or expense incurred related
to the purchased product when the above warranty terms and conditions are not fulfilled.

Accura 2350-GAS User Guide
Warranty
ⓒ 2014 Rootech Inc. All Rights Reserved
Page 5
Any technical assistance with system design provided by Rootech's personnel or representatives shall be
deemed to be a suggestion. The original purchaser is responsible for determining the feasibility of such
suggestions and should conduct tests to prove their feasibility.
It is the original purchaser’s responsibility to determine the suitability of the product and associated
documentation. The original purchaser should acknowledge that 100% 「up」time is not realizable because
of possible hardware or software defects. The original purchaser should recognize that such defects and
failures may cause inaccuracies or malfunctions.
No agency, corporate entity, or employee of Rootech or other companies has authority to amend, modify
or extend the terms and conditions of this warranty in any way without express written authorization from
Rootech Inc.
Standard Compliance
Process Control Equipment
E324900
R-R-RTE-ACCURA2300

Revision History
Accura 2350-GAS User Guide
Page 6
ⓒ 2014 Rootech Inc. All Rights Reserved
Revision History
The following versions of Accura GAS User Guide have been released.
Revision
Date
Description
1.00
August 7, 2014
Initial release
1.10
September 15, 2014
Added content on environmental conditions, including temperature and
humidity
Removed the event reset section in the setup mode
Added the event mode
1.11
November 21, 2014
Upgraded content on PPM conversion based on the methane gas
standard
1.20
December 18, 2014
Added the Notice, Standard Compliance, Warranty, and Contents sections
Added the communication setup section
1.30
April 12, 2018
Added the definite time characteristics of events
1.31
October 18, 2018
Added installation precautions
Added content on the limit on the number of GAS modules that can be
connected.
1.32
February 8, 2022
Changed the image and text on the cover page and information on
certifications
Updated the document according to the latest version of the
documentation
1.40
January 26, 2024
Added cautions when installing and operating the product

Accura 2350-GAS User Guide
Contents
ⓒ 2014 Rootech Inc. All Rights Reserved
Page 7
Contents
Chapter 1 Installation and Wiring...................................................................................................................................... 9
Before Installation ..................................................................................................................................................................................................9
Components...................................................................................................................................................................................................9
Dimensions......................................................................................................................................................................................................9
Installation...............................................................................................................................................................................................................10
Panel Mounting ......................................................................................................................................................................................... 11
DIN-Rail Mounting................................................................................................................................................................................... 11
Wiring .............................................................................................................................................................................................................12
Chapter 2 Accura 2350-GAS Operation/Setup .............................................................................................................. 13
Power Supply.........................................................................................................................................................................................................13
Functions .................................................................................................................................................................................................................13
Gas Measurement and Event Detection........................................................................................................................................ 13
Operation Mode........................................................................................................................................................................................ 14
Button Operation...................................................................................................................................................................................... 15
LCD Screen ............................................................................................................................................................................................................. 16
Display Mode..............................................................................................................................................................................................16
Event Mode.................................................................................................................................................................................................. 17
Setup Mode.................................................................................................................................................................................................18
Communication Setup............................................................................................................................................................................ 20
LED Indicator .........................................................................................................................................................................................................21
Chapter 3 Accura 2300S Operation/Setup ..................................................................................................................... 22
Display Mode of Accura 2300S.......................................................................................................................................................... 22
EVENT LED / LCD Backlight of Accura 2300S.............................................................................................................................22
DO Operation Setup on Accura 2300S Associated with the GAS Module.................................................................. 23
Accura 2350-GAS Module Setup ...................................................................................................................................................... 23
Event Mode on Accura 2300S Associated with the GAS Module .................................................................................... 24
Full-Screen Display Mode of Accura 2300S................................................................................................................................. 25
Appendix A Specifications................................................................................................................................................. 26
Appendix B Standards........................................................................................................................................................ 27
Appendix C Ordering Information ................................................................................................................................... 28

Figures
Accura 2350-GAS User Guide
Page 8
ⓒ 2014 Rootech Inc. All Rights Reserved
Figures
Fig 1.1 Accura GAS Components..............................................................................................................................................................................9
Fig 1.2 Accura 2350-GAS Front .................................................................................................................................................................................9
Fig 1.3 Accura 2350-GAS Rear...................................................................................................................................................................................9
Fig 1.4 Accura 2350-GAS Side ................................................................................................................................................................................ 10
Fig 1.5 Panel Mounting .............................................................................................................................................................................................. 11
Fig 1.6 DIN-Rail Mounting........................................................................................................................................................................................ 11
Fig 1.7 Communication Cable Connection ....................................................................................................................................................... 12
Fig 2.1 Accura 2350-GAS Front View...................................................................................................................................................................13
Fig 2.2 Relationship between Sensor Resistance and Gas Concentration(ppm)............................................................................ 14
Fig 2.3 Operation of the Event LED [Reset with the SET Button After the Event Ends] ............................................................ 17
Fig 2.4 Operation of the Event LED [Reset with the SET Button While the Event Occurs ].....................................................17
Fig 3.1 GAS Concentration ppm ............................................................................................................................................................................ 22
Fig 3.2 Status of the GAS Event ............................................................................................................................................................................. 22
Fig 3.3 DO Operation Setup on Accura 2300S Associated with the GAS Module....................................................................... 23
Fig 3.4 Start Event .........................................................................................................................................................................................................24
Fig 3.5 End Event ...........................................................................................................................................................................................................24
Fig 3.6 Event Occurrence Time ............................................................................................................................................................................... 24

Accura 2350-GAS User Guide
Chapter 1 Installation and Wiring
ⓒ 2014 Rootech Inc. All Rights Reserved
Page 9
Chapter 1 Installation and Wiring
Before Installation
Components
Fig 1.1 Accura GAS Components
Accura 2350-GAS
Mounting wings L/S
Two mounting screws
RJ12 6C communication line
Dimensions
Fig 1.2 Accura 2350-GAS Front
Fig 1.3 Accura 2350-GAS Rear

Chapter 1 Installation and Wiring
Accura 2350-GAS User Guide
Page 10
ⓒ 2014 Rootech Inc. All Rights Reserved
Fig 1.4 Accura 2350-GAS Side
Installation
The following environmental specifications should be considered when installing and operating the product.
Environmental Conditions
Description
Operating temperature
-20 –70 ℃(-4 –158 ℉)
Safe operating temperature 1
-20 –60 ℃(-4 –140 ℉)
Storage temperature
-20 –85 ℃(-40 –185 ℉)
Operating humidity
5 –95% (non-condensing)
Caution
You should take cautions when installing and operating the product in the following circumstances since
it can cause degraded sensor performance and reduced lifespan of the sensor.
- When it is exposed to silicone vapors
- When it is exposed to highly corrosive materials such as H2S, SOx, Cl2, HCl, etc.
- When it is contaminated by alkaline metals (e.g. salt water spray)
- When it is in contact with water

Accura 2350-GAS User Guide
Chapter 1 Installation and Wiring
ⓒ 2014 Rootech Inc. All Rights Reserved
Page 11
Panel Mounting
Fig 1.5 Panel Mounting
Please observe the following precautions for the installation location of Accura 2350-GAS module.
1) Determine where to install the module considering the flow path of combustible gases.
2) If there is no specific gas flow path, install it in the upper part of the installation space, considering the
rise of gas.
DIN-Rail Mounting
Fig 1.6 DIN-Rail Mounting

Chapter 1 Installation and Wiring
Accura 2350-GAS User Guide
Page 12
ⓒ 2014 Rootech Inc. All Rights Reserved
Wiring
①Connect the RJ12 6C communication line to the RJ12A/RJ12B port.
(Accura 2350-GAS module receives power from Accura 2300S via the RJ12 6C communication line.)
The number of Accura 2350-GAS modules that can be connected to Accura 2300 or Accura 2300S is
limited to 6 with 3 modules connected to each of RJ12-1 and RJ12-2 ports.
Fig 1.7 Communication Cable Connection

Accura 2350-GAS User Guide
Chapter 2 Accura 2350-GAS Operation/Setup
ⓒ 2014 Rootech Inc. All Rights Reserved
Page 13
Chapter 2 Accura 2350-GAS Operation/Setup
Fig 2.1 Accura 2350-GAS Front View
Power Supply
Item
Description
Power supply
Receives power from Accura 2300S through the RJ12 6C communication line
Current consumption
0.30 A @ 5V RJ12 power supply
Functions
Gas Measurement and Event Detection
Item
Description
Gas sensor
Model
TGS 813
Type
Tin dioxide(SnO2) semiconductor
Detection
Wide range of combustible gases
Measuring range of gas concentration 1
100 - 10,000 [ppm]
Event
Detects the occurrence of an "Over" event 2 based on the threshold value
1. It is concentration in ppm[parts per million] converted as shown in Fig 2.2: the output resistance of the gas sensor
is presumed as an average value of 10 kΩ based on the methane concentration of 1000 ppm, and measurements are
performed in the condition where the load resistance of the gas sensor is 18 kΩ.
2. An “Over”event consists of a start event and an end event.

Chapter 2 Accura 2350-GAS Operation/Setup
Accura 2350-GAS User Guide
Page 14
ⓒ 2014 Rootech Inc. All Rights Reserved
Fig 2.2 Relationship between Sensor Resistance and Gas Concentration(ppm)
Operation Mode
Mode
Description
Display mode
Displays the module ID and measured PPM values
Event mode
If a start event occurs, the screen automatically changes to the event mode.
When an event occurs, the maximum ppm value of gas and the event LED blink.
Users can reset the event mode by long pressing the SET button, and the screen returns
to the display mode.
Setup mode
Configures events and remote control

Accura 2350-GAS User Guide
Chapter 2 Accura 2350-GAS Operation/Setup
ⓒ 2014 Rootech Inc. All Rights Reserved
Page 15
Button Operation
The SET button is used to reset the event mode, or check and change setup items.
Resetting the Event Mode
Button
Function
[Display Mode]
Displays the module ID and measured PPM value
[Event Mode]
If an event occurs, the screen automatically changes to the event mode.
Automatic
switch
When an event occurs, the maximum ppm value of gas and the event
LED blink.
Long press 1
Users can reset the event mode by long pressing the SET button, and
the screen switches to the display mode. When the event mode is reset,
the event LED is turned off.
1. Release the button after pressing it for 1 second.
Performing Device Setup and Checking Setup Items
Button
Function
[Display Mode]
Displays the module ID and measured PPM values
[Setup Mode]
Short press 1
Go to the setup mode.
[The setup menu is sequentially selected each time the SET button is
pressed.]
Long press 2
Enter the edit mode.
A preset value blinks and can be changed.
Short Press
Select the preset value to change by pressing the button.
[The setup value changes sequentially each time the button is pressed.]
Long press
Save the selected setup value. And then the screen stops blinking.
[Go to the next setup menu.]
1. Press the button and release it immediately.
2. Release the button after pressing it for 1 second.
Note
If there is no button operation for 10 seconds in the setup mode, the screen automatically returns to the display
mode. If there is no button operation for 25 seconds in the edit mode, it automatically returns to the display mode.

Chapter 2 Accura 2350-GAS Operation/Setup
Accura 2350-GAS User Guide
Page 16
ⓒ 2014 Rootech Inc. All Rights Reserved
LCD Screen
Display Mode
Accura 2350-GAS module displays the module ID and measured PPM value, and the screens appear in the
following sequence. If you short press the SET button in the display mode, the screen switches to the
setup mode.
ID
PPM
ID Display
Display
Description
ID [d][d] 1
Accura 2350 ID 2
1. d →decimal number
2. Module IDs are divided into as follows. The standby ID 255 is assigned to all Accura 2350 modules as a factory
default value.
Accura 2350 ID
ID
Description
Communication ID
ID 0 –39
ID of Accura 2350 module available for communication
Conflict ID
Redundant IDs
There are more than 2 identical IDs. Communication unavailable
Standby ID
ID 255
Module ID for checking connection status, communication
unavailable
Gas PPM Display
The screen displays the output voltage of the gas sensor of Accura 2350-GAS module as the ppm value
converted as shown in Figure 2.2.
Display
Description
PPM [d][d][d] 1
Gas ppm [parts per million]
100 –10.0k
Displays a value from 100 ppm to 10,000 ppm
1. d →decimal number

Accura 2350-GAS User Guide
Chapter 2 Accura 2350-GAS Operation/Setup
ⓒ 2014 Rootech Inc. All Rights Reserved
Page 17
Event Mode
The screen automatically switches to the event mode when a start event occurs. In the event mode, the
maximum PPM value and the event LED blink. When the event occurs, the previously saved maximum
PPM value is reset, and the module measures the maximum value again from the starting point of the
event. Thus, it displays the maximum PPM value of the most recent event.
Maximum Gas PPM Display
MAX
Maximum PPM Value
[d][d][d] 1
Displays the maximum gas value in PPM
k segment
Indicates thousands
1. d →decimal number
Resetting the Event Mode
The event mode is reset by long pressing the SET button, and the screen switches to the display mode.
The event LED also stops blinking.
Fig 2.3 Operation of the Event LED [Reset with the SET Button After the Event Ends]
Button clear
threshold
ppm
with hysteresis
Gas Over
Start Event
End Event
Button Clear
LED
start event end event
Fig 2.4 Operation of the Event LED [Reset with the SET Button While the Event Occurs]
Button clear
threshold
Gas Over
Start Event
End Event
Button Clear
LED
ppm with hysteresis
start event end event start event

Chapter 2 Accura 2350-GAS Operation/Setup
Accura 2350-GAS User Guide
Page 18
ⓒ 2014 Rootech Inc. All Rights Reserved
Setup Mode
Each time the SET button is short pressed, the next setup menu is selected.
ID
Event
Threshold 1
Hysteresis 1
Definite Time1
Remote Control
1.It is not displayed when the event parameter is set to off.
Note
If there is no button operation for 10 seconds in the setup mode, the screen automatically returns to the display
mode. If there is no button operation for 25 seconds in the edit mode, it automatically returns to the display mode.
ID Setup
ID
Description
[d][d] 1
ID of Accura 2350 module 2
Default 255
Setup range: 0 –39
1. d →decimal number
2. Module IDs are divided into three types of IDs as follows. The standby ID 255 is assigned to all Accura 2350
modules as a factory default value.
Accura 2350 ID
ID
Description
Communication ID
ID 0 –39
ID of the module available for communication
Conflict ID
Redundant
IDs
There are more than 2 identical IDs. communication
unavailable
Standby ID
ID 255
Module ID for checking connection status, communication
unavailable
Event Setup
When the event parameter is set to on, the event LED is turned off.
Event
Description
oFF[default]
Event detection mode disabled
on
Event detection mode enabled
An Over event 1occurs when the measured value rises above the
threshold value for event detection and the definite time elapses.
1. An “Over”event consists of a start event and an end event.

Accura 2350-GAS User Guide
Chapter 2 Accura 2350-GAS Operation/Setup
ⓒ 2014 Rootech Inc. All Rights Reserved
Page 19
Threshold Setup
The threshold value for event detection can be set only when the event parameter is set to on.
Threshold
[d][d][d] 1
Default 2000 ppm
Threshold value for event detection
Setup range: 110 –9,990 ppm [0.11k - 9.99k]
1. d →decimal number
Hysteresis Setup
The hysteresis value for event detection can be set only when the event parameter is set to on.
Hysteresis
[d][d][d] 1
Default 500 ppm
Hysteresis value for event detection
Setup range: 10 –999 ppm
1. d →decimal number
Definite Time Setup
Definite Time
[d].[d] 1
Default 1.0 second
Definite time for event detection
Setup range: 0.5 –5.0 seconds / in steps of 0.5 seconds
1. d →decimal number
Item
Description
Start level
Threshold value for event detection
End level
Threshold value –Hysteresis value
Start event
A start event occurs when the measured value exceeds the threshold value for event detection
and the definite time elapses. A start event occurs again only if the measured value rises above
the threshold value again after the value drops below the end level and an end event occurs.
The Event LED blinks only when a start event occurs.
End event
An end event occurs when the measured value drops below the end level. The Event LED is
turned off only with the SET button.
Hysteresis
When the measured values often exceed and fall below the threshold value for event detection,
it can cause multiple events to occur. Thus, for effective event management, it is necessary to
set up a proper hysteresis level.
Remote Control Setup
Remote Control
on[On, Default]
Remote device setup and control is enabled via communication.
oFF[Off]
Remote device setup and control is disabled via communication.

Chapter 2 Accura 2350-GAS Operation/Setup
Accura 2350-GAS User Guide
Page 20
ⓒ 2014 Rootech Inc. All Rights Reserved
Communication Setup
The following parameters can be set up via Modbus communication. Refer to “Accura 2300/2350
Communication UserGuide” for details on communication settings.
Register
Number
Name
Format
Attribute
Description
1261
Module ID for
general setup
Uint16
PRW
Designates the ID of Accura 2350-GAS module to set up
For the module ID assigned to this register, general setup for
registers 1262 and 1263 –1302 is performed.
Extended setup for registers 3801 and 3802-4000 is also
performed.
Setup range: 0 –39 Default: 0
1262
Access for
module setup
Uint16
PRW
Base register for accessing registers 1263 –1302
By reading this register, the data collected from the module ID
assigned to register 1261 can be fetched to registers 1263 –
1302. After a successful fetch, the Bit[15] is indicated as 1.
By writing 1 to this register, data on registers 1263 - 1302 are
applied to the designated module.
1263
Gas threshold
Uint16
PRW
Sets up the threshold value for detection of gas events
An event occurs when the measured value exceeds the threshold
value.
Unit: PPM
Setup range: 110 –9990 [PPM]
Default: 2000 [PPM]
1264 -
1268
Reserved
1269
Event enable
Uint16
PRW
Sets up the detection mode of gas events
0: (default) Disable 1: Enable
1270
Hysteresis
Uint16
PRW
Sets up the hysteresis value for event detection
The end level of the event is determined by subtracting the
hysteresis value from the threshold value (threshold –hysteresis).
Setup range: 10 –999 [PPM]
Default: 500 [PPM]