olympia electronics TC100N User manual

TC100N
Fixed Gas Detector Operation Manual

Safety Information
Before using this device, please carefully read the following safety
information:
After opening the packing box, please check if there is any crack on
the device or spare part missing. If the device found damaged,
please don't use it. Please contact the seller.
Before using, please make sure the covers are fixed tightly.
In order to assure the sensitivity and accuracy, please calibrate zero
point before the first time of using.
Working voltage of the device is 18VDC-30VDC and suggested
voltage is 24VDC. Any voltage beyond 30VDC will damage the
device.
Please don't install the device on the place where there is fast flow
passing. Otherwise, it will influence the result.
Please don’t expose the device always to high concentration gas
(higher than the detecting range). Otherwise, it will shorten the
sensor life.
Please don’t paint the gas sensor or detector.
Only special designed gas sensor is allowed to be used on the
device.
Calibrate the gas sensor once at least every 180 days. We suggest
the user inspect or test device regularly, so as to avoid the problems
of falling dust on the sensor head or unexpected painting.
Wire connection must be carried when the power is cut off. Before
opening the cover, please make sure there is no mixture gas of
combustible gas and air in the environment, so as to avoid any
possible explosion.
Please avoid water or dust to come into the cover through the wire
connection holes. Otherwise, it will easily damage the device.
Please avoid the device from electric shock and continuous serious
mechanical striking.

Installation must abide by the local electric equipment installation
regulations.
It’s forbidden for the user to disassembly, adjust and repair the
device or to replace the internal spare parts.
All operation inside the device must be carried by professional
personnel. Before operation, please carefully read and understand
the operation manual.
Precautions:
To avoid personal safety injury, Instrument damage and potential
dangerous accident; do not install the gas detector before reading this
manual
1. Brief Introduction
TC100N fixed gas detector adopts
advanced catalytic gas sensor or
electrochemical sensor, which can
translate the gas concentration in
the air to the digital signal output.
TC100N adopts three wire 4~20mA
electric current signal to connect to
the gas monitor panel.
The detector working with gas
controller can be used to detect gas
in refinery, chemical plant, LPG
station, boiler room, painting plant
and other places with gas exists.

2. Specifications
Gas
Range
Resolution
Low alarm
High alarm
LEL
(0~100)%LEL
1%LEL
20%LEL
50%LEL
HC vapour
(0~100)%LEL
1%LEL
20%LEL
50%LEL
O2
(0~30)%vol
0.1%vol
19.5%vol
23.5%vol
CO
(0~1000)ppm
1ppm
35ppm
200ppm
H2S
(0~100)ppm
1ppm
10ppm
15ppm
CL2
(0~20)ppm
0.1ppm
5ppm
10ppm
SO2
(0~500)ppm
1ppm
10ppm
50ppm
NH3
(0~100)ppm
1ppm
25ppm
50ppm
Sensor type: Catalytic or electrochemical gas sensor
Sampling: Natural diffusion
Working type: Continuously working
Error: ≤±5%F.S.
Response time (T90): ≤30s (LEL) / ≤60s (toxic gas)
Working condition:
Temperature: -40～70℃(LEL) / -20～50℃(toxic gas)
Humidity: ≤95%RH (no condensation)
Explosion-proof grade: ExdⅡCT6
Protection grade: IP55
Working voltage: DC24V±25%
Working pressure: 86kPa～106kPa
Signal output: 4-20mA 3-line
Consumption: 2W/channel
Life: Catalytic sensor 3 years; electrochemical sensor: 2 years
Connection screw size: G1/2”
Cable required: 3-line cable, ≥3 mm2
Transforming distance: ≤1000m
Dimension and weight: l×b×h mm 196×186×68.5 App. 1200g

3. Structural Drawing
The device consists of the housing, sensor part and PCB. The housing
consists of upper cover, lower cover, O-type circle and cable input hole
part. The housing function is to protect the inside part. The sensor part
consists of gas sensor, sensor protection cover, decoration part and
calibration cap. The sensor and housing is connected by potting epoxy
resin. The following is the structural drawing:
No.
Name
No.
Name
No.
Name
1
Upper cover
5
Lower cover
9
Fixing circle
2
O-type circle
6
Ground nut
10
Pad
3
Protection part
7
Sensor module
11
Seal ring
4
PCB
8
Closing plug
12
Connector
4. Installation
4.1 Position
4.1.1 For petrol gas, oil gas and alcohol gas etc. which is heavier than
the air, the position is 0.3m-0.6m higher than the ground.
4.1.2 For natural gas, CH4 etc which is lighter than the air, the position is
0.5m-2m higher than the gas source.
Note: Gas density more than 0.97kg/CBM, then it's heavier.
Fig. 1 Structural drawing

Gas density less than 0.97kg/CBM, then it's lighter.
4.1.3 The position should be far away from shocking, shattering, strong
electromagnetic interference. Around the position, there should be at
least 0.3m empty place.
4.1.4 The position should be within 1m around the possible gas leakage
area, such as valve, pipe connection point, gas outlet place. Please try to
install it nearer to the above places, but avoid influencing the working of
the other equipments. Please avoid the environment of high temperature
and humidity. Also please keep it from water swashing, oil and
mechanical damage. Please also consider the convenience of
maintenance and calibration.
4.1.5 For large scale detection, we suggest install 1pc every 10-12
square meters, so as to get the best detection result.
4.2 Dimensions
4.3 Installation methods
Note: Fix the detector with sensor head downwards. According to the
installation place, fix the detector onto the wall or gas pipes. Details as
follows:
Method 1 Wall mounted: According to the device dimension, choose a
Fig. 2 Dimension
Drawing

suitable wall. First fix devices on the wall by 4pcs of M6×60 bolts.
Method 2 Screw Buttjoint Connection: If there is pipe screw of G1/2
on the spot, the user can butt joint the device to the pipe screws and then
screw tightly the device.
1
Wall
2
Fixing holes
3
Bolts
1
Pipe with screw
2
Connector
Fig. 3 Wall Mounted
Fig.4 Screw Buttjoint Connection-1

Method 3 Pipe Installation:
If there is 1" to 2" (diameter) pipe, the user can use 2 U-type bolts to fix
the hanging plate on the pipe, then fix the detector onto the plate. Or, the
user can first fix the detector onto the plate and then fix the plate on the
pipe.
1
Pipe with screw
2
Connector
1
Installation plate
2
Detector
3
Fixing bolts
4
Pipes
5
U-type bolts
Fig. 5 Screw Buttjoint Connection-2
Fig. 6 Pipe Installation

Fig. 7 Inside the device
5. Wire connection
Warning: All the wire connection must be carried when the power is cut
off.
Procedure:
5.1 Take off the up cover from the device and the inside can be seen.
5.2 Screw down the pipe connector in counter-clockwise way. Take out
the explosion-proof pad. In turns, put 3-line wire to the internal of the
enclosure through the pipe connector, compaction circle, air-proof
closing plug and the wire connection hole.According to the
explosion-proof requirement, please don't take out the explosion-proof
closing plug from the unused wire connection holes. Please don't throw
away any part inside the enclosure or the PCB.
No.
Name
1
DIP switch
2
+ button
3
- button
4
Calibration LED
5
Power LED
6
Terminals
7
Fixing holes/Ground
No.
Icon
Name
Specification
1、2
NC
Low alarm
---
3、4
NC
High alarm
---
5
Iout
4-20mA
output
4～20mA
6
－
Cathode of
power
DC24V±25%
7
24V
Anode of
DC24V±25%

5.3 All the wires must be
connected to the terminals as shown on the following drawing.
5.4 After the correct wire connection, take out the useless wire from the
enclosure. Then screw on the connector, tighten the compaction circle,
rubber air-proof circle and wire. Explosion-proof soft tube can also be
connected with the device directly.
Note: The size of the wire between the controller and detector should be
not less than 6mm, and the distance should be note more than 1000m.
5.5 After checking all the connection well, install the display PCB and the
front cover. Make sure O-type circle is put on and connected with the
cover tightly.
6. Debugging
Before adjusting, please be noted of the following information:
Note: Adjusting must be carried out by professional personnels.
Procedures:
power
Warning!
Make sure wire connection is good and then connect it to the
power.
Make sure there is no combustible gas leakage on the spot.
Don't use pure gas or light to test it. Otherwise, it will damage
the sensor or lower the sensitivity.
Fig. 8 Terminals

6.1 Connect the wire correctly according to installation position and wire
connection instruction. Then connect the device to the power. Green
power LED is flickering and the detector enters into warm up status.
6.2 After 3 minutes of warm up, green power LED is on continuously and
the detector enters into normal working status.
7. Calibration
Calibration is to adjust the value of the detector in the specific gas
environment so as to assure the detecting accuracy and reliability.
Normally, it includes zero calibration and single point calibration.
Calibration instruction is as follows:
7.1 Electrify the detector so as to ensure it can work normally.
7.2 Zero Calibration
7.2.1 Put the device into the clean air and keep it working for at least 10
minutes. Then hold both S2 and S3 buttons continuously for 1-2 seconds,
the green power LED starts to flicker, which indicates the device enters
into calibration status. Adjust the first digit of DIP switch to "ON". Red
LED starts to flicker and green LED is continuously on. The controller
displays 0. After several seconds, resume the first digit of DIP switch to
the original position, and the detector remembers the present level as
zero. Red LED flickers several times and then is off. Zero calibration is
completed.
7.2.2 If zero calibration cannot be carried out in the clean air, then please
follow the above instruction to enter into the calibration status. When the
first digit of DIP switch is to "ON" and red LED starts to flicker, inhale N2
gas or synthetical air onto the sensor continuously for more than 10
minutes. Then resume the first digit of DIP switch to the original
position, and the detector remembers the present level as zero. Red
LED flickers several times and then is off. Zero calibration is completed.
7.3 Single Point Calibration
7.3.1 Equipment
1 bottle of standard gas: normally the concentration is 40%F.S.

1000ml/min gas flow meter
7.3.2 Procedure:
7.3.2.1 Hold both S2 and S3 buttons continuously for 1-2 seconds, the
green power LED starts to flicker, which indicates the device enters into
calibration status. Adjust the second digit of DIP switch to "ON" (which is
40%F.S calibration point. For details of calibration points, please refer to
the following table.) Red LED starts to flicker.
Note: Without permission, nobody is allowed to adjust the DIP switch.
7.3.2.2 Connect gas bottle and gas flow meter correctly. Open the gas
bottle and adjust the flow meter according to the above table. Connect the
tube to the calibration cap of the detector. After 2 minutes of inputing gas,
when the controller displaying value will be the same with the standard
gas concentration, resume the DIP switch to the original position and the
detector will remember this value. Red LED flickers several times and
then is off. Then close the gas bottle and take off the tube. The calibration
is completed.
DIP
switch
Calibration
DIP
switch
Calibration
Zero calibration
10%F.S calibration
point
40%F.S calibration
point
20%F.S calibration
point
50%F.S calibration
point
60%F.S calibration
point
Note: Black part is position of the DIP switch.

7.4 Calibration of Oxygen Detector
7.4.1 Zero calibration
Disconnect the sensor module from the detector. At the same time, hold
both S2 and S3 buttons continuously for 1-2 seconds, the green power
LED starts to flicker, which indicates the device enters into calibration
status. Adjust the first digit of DIP switch to "ON". Red LED starts to
flicker and green LED is continuously on. After several minutes, resume
the first digit of DIP switch to the original position, and the detector
remembers this value as zero. Red LED flickers several times and then
is off. Zero calibration is completed.
7.4.2 Single Point Calibration (20.9%VOL)
After zero calibration, connect the sensor module to the detector correctly
and electrify the detector. After working for 10 minutes, follow the above
instruction to enter into calibration status. Adjust the second digit of DIP
switch to "ON" (which is 20.9%VOL. Red LED starts to flicker. After
several seconds, resume the DIP switch to the original position and the
detector will remember this value. Red LED flickers several times and
then is off. The calibration is completed.
8. Sensor replacement
In normal working environment, the catalytic sensor life is 3 years and

electrochemical sensor is 2 years. When the sensor life is overdue or the
sensor is damaged, please follow the following instruction to replace the
sensor.
Before replacing sensor, please first cut off power supply. The user
doesn’t need to open the detector cover, but only need to open the cover
the sensor module.
8.1 Take off the calibration cover in counter-clockwise.
8.2 Pull out the decoration part downwards.
8.3 Screw off the jbckscrew from the sensor protection cover.
8.4 Take off the protection cover in counter-clockwise.
8.5 Take out the old sensor.
8.6 Put the new sensor into the sensor cover.
Note: Please put the new sensor into the correct fixing holes. It's
forbidden to rotate the sensor.
8.7 Then install in turns protection cover, jbckscrew, decoration part and
calibration cap. The replacement is completed.
8.8 Electrify the detector and calibrate the detector.

9. Normal fault and solution
Fault description
Reason
Solution
No response for
detection gas
time-lapse doesn’t
end
Wait till it ends
Sensor broken
Change sensor
Circuit fault
Factory maintain
Abnormal
connection
with Controller
Wire connection
Fault
Check the wire
connection
Open circuit of
signal output
Inspect the open
circuit
Circuit Fault
Factory maintain