SENKO SI-300 User manual

Explosion-proof pump type gas detector
(SI-300) OPERATING MANUAL

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WARNING
Please be fully aware of the manual before using the device. This device must be used and repaired in accordance
with the instructions, and failure to follow the instructions can cause device failure or risk user injury or life.
Warning
➢Please remove any debris on the surfaces of the sensor before use.
➢Please test the alarm to see if it's working regularly.
➢Use within the range of temperature, humidity, and pressure that meet the product specifications. Out of this
range, it may cause malfunction or failure of the device. The sensors inside the device may indicate the gas
concentration differently according to the environment such as temperature, pressure, and humidity. Please
make sure to calibrate the detector under the same or similar environment to the specification.
➢Extreme changes in temperature may cause drastic changes of the gas concentration. (e.g. using the detector
where there is a huge gap between the inside and outside temperature) Please use the device when the
concentration becomes stable.
➢The alarms are set according to the international standard and must be changed by an authorized expert.
➢The FLOW LIMITED DEVICE must be connected, and the material should not include a polymer or an elastic
material.
Caution
➢Use the device after reading this manual thoroughly.
➢This product is not a gas measuring meter. It's a gas detector.
➢Please stop using and consult the manufacturer if the calibration fails continuously.
Warranty
We, SENKO CO., LTD warrant replacement or repair for the products of SI series for 24 months from the shipment date of the
product(s). However, the parts, whose life can be shortened by use, such as sensors, batteries and lamps are not under the
warranty. Also, Free repair and replacement is not available in case of purchases of our products through unauthorized channels,
mechanical damage, and deformation by user’s misuse, and calibration and replacements of parts without following the
instruction in the manual. If any defect or quality problem occurs to the products during the warranty period, the user should
notify it to the manufacturer. In this case, all the expenses except freight cost are paid by SENKO. Repair, replacement and freight
cost for the products, whose warranty is already over, are paid by the user. SENKO CO., LTD does not have any responsibility for
indirect, or accidental loss which occurs while using our products, and the warranty is limited to the exchange of parts and
products. The warranty is subject to the users who have bought products from the authorized agency and office appointed by
SENKO CO., LTD, and warranty repairs must be made through the designated A/S center of SENKO CO., LTD with a skilled
technician.

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Contents
1. Product Overview ........................................................................................................................... 4
1.1. Specification..................................................................................................................................................4
1.2. Sensor List .....................................................................................................................................................5
1.3. Outline.............................................................................................................................................................6
2. Appearance and Description........................................................................................................ 7
2.1. Component ...................................................................................................................................................7
2.2. Front Display Configuration...................................................................................................................9
3. How to install................................................................................................................................ 10
3.1. Power, RS485, 4-20 mA Terminal configuration .................................................................................10
3.1.1. DC Terminal ....................................................................................................................................... 10
3.1.2. RS485 Terminal................................................................................................................................. 11
3.1.3. 4-20mA Terminal............................................................................................................................. 11
3.1.4 PoE Ethernet Terminal.................................................................................................................... 11
3.2. Alarm Terminal configuration............................................................................................................11
3.3.1. Fault Relay Output Configuration............................................................................................ 11
3.3.2. Low Relay output configuration.............................................................................................122
3.3.3. High Relay output configuration............................................................................................122
3.3 Ground connection configuration ..................................................................................................122
4. Usage ............................................................................................................................................133
4.1. Power On..................................................................................................................................................133
4.2. Measuring Mode ...................................................................................................................................133
4.3. Internal settings......................................................................................................................................144
5. System Mode...............................................................................................................................155
5.1. Mode configuration .............................................................................................................................155
5.2. Menu configuration..............................................................................................................................155
5.3. Setting/Configuration Menu ............................................................................................................166
5.4. Setting/Measurement Menu ..............................................................................................................20

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5.5. Setting/Calibration Menu ..................................................................................................................221
5.6. Setting/Alarm Menu............................................................................................................................... 22
6. Problem Solving............................................................................................................................ 24
6.1. Error code ...................................................................................................................................................24
7. Interface Configuration ............................................................................................................... 25
7.1 RS485 Interface setting..........................................................................................................................25
7.2 TCP Interface setting ..............................................................................................................................25
7.3 MODBUS RS485/TCP Register............................................................................................................25
⚫3000X Register Read.......................................................................................................................... 25
⚫4000X Register Read.......................................................................................................................... 26
⚫4000X Register Write......................................................................................................................... 28
8. Appearance and Dimensions................................................................................................ 29
9. Installation precautions......................................................................................................... 30
9.1 Selection of installation location.......................................................................................................30
9.2 Selection of installation position.......................................................................................................30
9.3 A/S Contact Information.......................................................................................................................30
10. Revised History ....................................................................................................................... 31

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1. Product Overview
1.1. Specification
◼Explosion-Proof structure.
◼Cartridge type sensor –Easy maintenance
◼Built-in flow control function.
◼4-Digit Digital Concentration Indication and Digital Flow
Indication
◼4-20mA / RS-485 / Ethernet
Model
SI-300
Size
194mm(W) X 152.4mm(D) X 136mm(H)
Weight
2Kg
Operating voltage
DC : 24V ± 10%
PoE : 36V~57V (Typical : 48V)
Flow rate
100 ~ 1,000 ml (Normal 300 ~ 500ml / min)
Power consumption
Approximately 5.0W
Measurement display
FND, gas concentration, flow rate, alarm, device faulty
Relay
Low Alarm, High Alarm, Fault Alarm
Analog Output signal
4-20mA
Digital communication
RS-485, TCP Ethernet
Sampling distance
Length of input gas tube: up to 30m (FEP tube)
Length of exhaust gas tube: up to 30m (FEP tube)
Input/Output tube
1/4” Teflon tube
Operating temperature
-40°C ~ 55°C
Certification
KCs: Ex db IIC T6 Gb
IP
IP 65 (KS C IEC60529:2013)
Control/Set
4 Button & RS485 & Ethernet & Bluetooth
Warranty period of the
device
2 years
Warranty period of sensor
cartridge
1year
Remote interface
Ethernet , RS-485, HART(Option)
Wiring
4 to 20mA / DC power / Relay : up to 14 AWG
Pressure range
90 to 110KPa
Maximum sample flow
Max. 1,000 ml
Maximum sample pressure
6KPa

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1.2. Sensor List
Gas
Sensor
Range
A1
A2
Resolution
Oxygen
O2
Electrochemical
0~30%Vol
19.0%vol
23.0%vol
0.1%vol
Carbon Monoxide
CO
Electrochemical
0~500ppm
30ppm
60ppm
1ppm
Sulfur Dioxide
SO2
Electrochemical
0~20ppm
2ppm
5ppm
0.1ppm
Hydrogen
H2
Catalytic
0~100%LEL
15%LEL
50%LEL
1%LEL
Hydrogen
H2
Electrochemical
0~1000ppm
100ppm
500ppm
within 5ppm
Hydrogen Sulfide
H2S
Electrochemical
0~500ppm
10ppm
15ppm
1ppm
Combustible
-
Catalytic
0~100%LEL
15%LEL
50%LEL
1%LEL
Combustible
-
IR
0~100%LEL
15%LEL
50%LEL
1%LEL
Ammonia
NH3
Electrochemical
0~100ppm
25ppm
35ppm
1ppm
Acetylene
C2H2
Catalytic
0~100%LEL
15%LEL
50%LEL
1%LEL
Ethanol
C2H6O
Catalytic
0~100%LEL
15%LEL
50%LEL
1%LEL
Toluene
C7H8
IR
0~100%LEL
15%LEL
50%LEL
1%LEL
Toluene
C7H8
Catalytic
0~100%LEL
15%LEL
50%LEL
1%LEL
Methane
CH4
IR
0~100%LEL
15%LEL
50%LEL
1%LEL
Methane
CH4
Catalytic
0~100%LEL
15%LEL
50%LEL
1%LEL
Chlorine
Cl2
Electrochemical
0~5ppm
0.5ppm
1.0ppm
0.1ppm
Chlorine
Cl2
Electrochemical
0~20ppm
0.5ppm
1.0ppm
0.1ppm
Carbon Dioxide
CO2
IR
0~2000ppm
1000ppm
1500ppm
3ppm
Carbon Dioxide
CO2
IR
0~5000ppm
3000ppm
5000ppm
8ppm
Carbon Dioxide
CO2
IR
0~5%Vol
0.5%vol
3%vol
0.1%vol
Hydrogen Chloride
HCl
Electrochemical
0~10ppm
1ppm
2ppm
0.1ppm
VOC
VOC
PID
0~1000ppm
50ppm
100ppm
within 3ppm
Xylene
C8H10
IR
0~100%LEL
15%LEL
50%LEL
1%LEL
Hydrogen peroxide
H2O2
Electrochemical
0~10ppm
1ppm
2ppm
0.1ppm
Nitrogen Dioxide
NO2
Electrochemical
0~20ppm
3ppm
5ppm
0.1ppm
Ethylene oxide
C2H4O
Electrochemical
0~30ppm
1ppm
2ppm
0.1ppm
Ethylene
C2H4
Catalytic
0~100%LEL
15%LEL
50%LEL
1%LEL
Nitrogen Monoxide
NO
Electrochemical
0~100ppm
25ppm
50ppm
1ppm
Hydrogen fluoride
HF
Electrochemical
0~5ppm
0.5ppm
1ppm
0.1ppm

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1.3. Outline

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2. Appearance and Description
2.1. Component

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NO
NAME
DESCRIPTIONS
1
Case cover
It protects sensors and PCB boards built into the product from external
environmental changes and shocks.
2
Mount Holes
It is a Mounting Hole used to fix the product.
3
FND display
When setting the gas concentration value and parameter measured by the sensor,
the set mode is indicated by numbers and icons. (Refer to the "Front LED Display
Configuration" described in detail.)
4
Power LED
When the power supply DC 24V is normally supplied, the green LED is turned on.
5
Trouble LED
When sensors and flow rates are recognized as failures, the yellow LED is lit, and
when set, the Trouble Relay contact signal is output to the outside.
6
Alarm1 LED (Red)
When the measured gas concentration exceeds the Alarm1 setting, the LED is
turned on, and the Relay contact signal is output to the outside when setting.
(Alarm1 level setting can be arbitrarily set in Alarm setting mode.)
7
Alarm2 LED (Red)
When the measured gas concentration exceeds the Alarm2 setting, the LED is
turned on, and the Relay contact signal is output to the outside when setting.
(Alarm2 level setting can be arbitrarily set in Alarm setting mode.)
8
Menu key
Mode switching and setting key in function setting mode. If you press Menu for
more than 1 second in the measurement mode, it enters the function setting Menu.
(Configuration, Measurement, Calibration, Alarm, etc.)
9
Up key
It is a key that increases the setting value in the function setting mode.
10
Down key
It is a key that lowers the setting value in the function setting mode.
11
Select key
Select key is used when setting menu status in function setting mode. If you press
the Select key and Down key more than 3 sec at the same time in the measurement
mode, it enters the inspection mode, and the TEST LED flashes.
12
Window Glass
It is a tempered glass that allows you to see the display status that informs you of
the product status in Housing.
13
Cover fixed screw
It is a screw that fixes the main body case and the front cover case.
14
Gas inlet
Sample gas inlet port. (1/4” Tube)
15
Gas outlet
Sample gas output port. (1/4” Tube)
16
Cable gland
It's the entrance to the power and signal cable.
17
Breathing Device
Breather function of Flame arrester / Ex d IIC Air Breather (SAB)
Authentication number: 17-GA2BO-0697U
18
External earth
External earth to protect against external noise or ferroelectricity.
The earth wire is coupled and connected using a conductor of 4mm or more.
19
Internal earth
Internal earth to protect against external noise or ferroelectricity.
The earth wire is coupled and connected using a conductor of 4mm or more.

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2.2. Front Display Configuration
No
Name
Descriptions
1
Power LED(Green)
When the power (DC 24V) is supplied normally, the LED is lit..
2
Trouble LED
When self-diagnosis of Gas detector, display if fault is detected.
3
Alarm1 LED
Alarm1 is set or displayed when detected.
4
Alarm2 LED
Alarm2 is set or displayed when detected.
5
FND DISPLAY
When setting the gas concentration value and parameter by the sensor, the setting
mode is displayed as numbers and icons.
6
FLOW LED
Display the current flow rate in a graph bar.
7
CAL LED
Displayed during the calibration.
8
MAINT LED
Display when running Engineering mode.
9
COMM LED
Displayed during RS485/Ethernet communication.
10
TEST LED
Display when executing the test mode.
11
BT LED
Display when connecting to Bluetooth.
[Table 2. Description of Front LED Display Configuration]

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3. How to install
Installing a detector at a site, opening the cover of a detector, or operating it may cause fire or
explosion depending on the environment. Therefore, you should proceed with your work after turning
off the power and examining whether explosive residual gas is around you or not.
3.1. Power, RS485, 4-20 mA Terminal configuration
Loosen the case cover fixed screen on the side of the detector and separate the case
cover. Then Terminal appears.
3.1.1. DC Terminal
The DC terminal consists of a terminal for power supply of the detector.
Pin No.
Name
Description
1
GND
Ground
2
24V
Power
Shield cables above 1.5 sq should be used.
When the external power DC24V is used, connect to the "CON100" Terminal of the
terminal unit.

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3.1.2. RS485 Terminal
 Connect the following MODBUS master terminals to RS-485A and RS-485B.
Pin No.
Name
Description
1
B
TR XD- ’ or ‘ B or ‘ N ’‘
2
A
TR XD+ ’ or ‘ A or ‘ P ’
3.1.3. 4-20mA Terminal
The 4-20 mA terminal consists of terminals for 4-20 mA output.
Pin No.
Name
Description
1
GND
4~20mA Ground
2
OUTPUT
4~20mA Output Signal
3.1.4 PoE Ethernet Terminal
The PoE terminal connects the PSE and the detector through a LAN CABLE (CAT5
Cable or Equivalent RJ45).
Pin No.
Name
Description
CON400
RJ-45 JACK
PoE & Ethernet Connected
3.2. Alarm Terminal configuration
Connect the Alarm Relay connected to the terminal using the following configuration.

3.3.1. Fault Relay Output Configuration
Name
Fault Relay Contact
Jumper Setting
FAULT-OUT
Normal Close Mode
J7 Jumper NC on
Normal Open Mode
J7 Jumper NO on
FAULT-COM
Common
-

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3.3.2. Low Relay output configuration
Terminal
Fault Relay Contact
Jumper setup
AL1-OUT
Normal Close Mode
J6 Jumper NC on
Normal Open Mode
J6 Jumper NO on
AL1-COM
Common
-
3.3.3. High Relay output configuration
Terminal
Fault Relay Contact
Jumper setup
AL2-OUT
Normal Close Mode
J3 Jumper NC on
Normal Open Mode
J3 Jumper NO on
AL2-COM
Common
-
3.3 Ground connection configuration
⚫Internal grounding: You can ground the internal grounding through point 1 using the ring terminal.
⚫External grounding: Can ground the external grounding through point 2 using the ring terminal.
Internal
grounding
External
grounding

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4. Usage
4.1. Power On
Check the wiring and power voltage then turn on the power switch.
After the Power LED (Green) and Version information (ex V1.00) are displayed, it
followed to the Measuring mode.
 It takes about 3 minutes to warm up. If the MENU key is pressed during the instrument warm
up operation, it immediately switches to the Measuring mode .
4.2. Measuring Mode
Alarm LED
▶Power/Trouble/Alarm 1/Alarm2
Current gas concentration display
Gas concentration unit display
▶Changing a decimal point based on the range
Current Pump flow display
Pump flow
▶Current suction flow
Status LED
▶CAL: Calibration in progress
▶MAINT: Maintenance in progress
▶COMM: Communication status
▶TEST: Test in progress
▶BR: Bluetooth connection status

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Trouble(Fault) Status
▶Trouble LED lights up when a problem occurs
▶See Error Code 6.1.
4.3. Internal settings
▶In the measurement state, press the Menu Key
for more than 1 second to enter the password
request state.
1. [**] will be displayed at the PW state.
2. The initial value is [00] and can be changed from
[00] to [99] with the Up/Down Keys.
After entering the password, press the Select Key
to enter the internal setting.
1. In the internal setting mode, each setting can be
entered by using the Up/Down Keys.
2. CFG/MEAS/CAL/ALM are configurable.

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5. System Mode
5.1. Mode configuration
The device consists of the following menu configuration.
Division
Mark
Definition
Note
CONFIGURATION
CFG
Basic setting
MEASUREMENT
MEAS
Measurement setting
CALIBRATION
CAL
Calibration setting
ALARM
ALM
Alarm setting
TEST
TEST
Test
Engineering Mode
TIME
TIME
Time setting
Engineering Mode
FLOW
FLOW
Pump Flow setting
Engineering Mode
NETWORK
NET
Ethernet setting
Engineering Mode
ADJUST
ADJ
4-20mA output setting
Engineering Mode
FACTORY
FACT
Factory setting
Engineering Mode
[Table 4. Mode Configuration]
5.2. Menu configuration
The menu configuration of the equipment is as follows.
1 Depth
2 Depth
3 Depth
Default
CFG
(Configuration)
GAS
Gas sensor type
-
HART
HART Board availability
-
MODT
Modbus Type(RTU/TCP)
TCP
ADR(Address)
Modbus Address(0~64)
1
PWD(Password)
Password setting (00~99)
00
C-TM(Calibration Time)
Calibration cycle (1~12months)
12
HIDN(Hidden Area)
Hidden area (Full Range standard 0~20%)
03%
BRIT
FND Brightness
5
M1.00
Firmware version
-
S1.00
Sensor cartridge version
-

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1 Depth
2 Depth
3 Depth
Default
MEAS
(Measurement)
DECP (Decimal Point)
Decimal point (1000, 100.0, 10.00, 1.000)
100.0
F-RN (Full Range 1~9999)
Full measuring range (1~9999)
100
UNIT
Measuring unit (PPB, PPM, VOL%, %LEL)
PPM
1 Depth
2 Depth
3 Depth
Default
CAL
(Calibration)
ZERO (Zero Calibration)
Zero Calibration
Based on gas
S-CN (Span Concentration)
Span Gas Concentration setting
(1~9999)
Based on gas
SPAN (Span Calibration)
Span Calibration
Based on gas
1 Depth
2 Depth
3 Depth
Default
ALM
(Alarm)
LACH(Latch)
Alarm Latch(ON, OFF)
OFF
ENER(Energized)
Alarm Energized(EN, D-EN)
EN
DLY(Delay)
Alarm Delay(0~99sec)
0
ALM1(Alarm level 1)
Alarm 1 level (1~Full Range)
Based on gas
ALM2(Alarm level 2)
Alarm 2 level (1~Full Range)
Based on gas
5.3. Setting/Configuration Menu
Internal preferences are configurable by using
Up/Down Keys.
- GAS/HART/MODT/ADR/PWD/C-TM/HIDN
BRIT/M1.00/S1.00

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Gas type
▶Press the Select Key to display the current gas
type
HART availability
▶Press the Select Key to display the HART mode
availability
Changing to Modbus Type
▶Press the Select Key to enter the change
▶Select RTU/TCP by using Up/Down Key
▶Press the Select Key to save the change. The
mode applies after restarting the device

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Changing Modbus Address
▶Press the Select Key to enter the change
▶Select 1~64 by using Up/Down Key
▶Press the Select Key to save the change
Password settings
▶Press the Select Key to enter the change
▶Select 00~99 by using Up/Down Key
▶Press the Select Key to save the change
Calibration cycle setting
▶Press the Select Key to enter the change
▶Select 1~12months by using Up/Down Key
▶Press the Select Key to save the change

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Hidden Area setting
▶Press the Select Key to enter the change
▶Select 0~20% by using Up/Down Key
▶Press the Select Key to save the change
Brightness setting
▶Press the Select Key to enter the change
▶Select 1~15 by using Up/Down Key
▶Press the Select Key to save the change
Firmware Version
Sensor cartridge version