Optex TC-Mi User manual

OPTEX CO., LTD.
5-8-12, Ogoto, Otsu, Shiga, 520-0101 Japan
Tel.[phone] Fax.[phone]
https://www.optex.co.jp/e/products/environmental-sensor/
TC-Mi
Turbidity Checker
Thank you very much for purchasing Turbidity Checker TC-Mi.
All of this instruction manual must be read before operation of the
Turbidity Checker for safe and proper operation.
This instruction manual should be kept for future reference such as
maintenance.
2023.07 59-2568-2
Instruction
Manual
The instruction manual is also available on the following website.
https://navi.optex.net/manual/05297/?lang=en
UK contact information
https://navi.optex.net/cert/contact/
EU contact information
Whole document of the DOC can be referenced in the following website;
www.optex.net

1
The Contents of Packaging Table of Contents
1. For safe use ...........................................................................2
2. Names of the parts ...............................................................4
3. Measuring principle ............................................................ 10
4. Installation ........................................................................... 11
Installing TC-Mi unit ...................................................... 11
Wiring.............................................................................. 13
Setting the DIP switch ................................................... 14
5. Operation start .................................................................. 15
6. Operation ........................................................................... 16
Setting ........................................................................... 16
Output selection ............................................................ 19
Alarm level, Alarm timer ................................................ 20
Signal output response time setting .............................. 21
Noise reduction setting ................................................... 22
Turbidity unit selection ................................................... 23
Offset adjustment ............................................................ 24
LCD contrast adjustment ................................................ 24
Digital communication setting display ........................... 25
7. Troubleshooting .................................................................. 26
8. Maintenance........................................................................ 27
9. Specifications ..................................................................... 29
10. Dimensions ........................................................................ 30
11. Digital communications ...................................................... 31
MODBUS protocol ......................................................... 31
TC-Mi protocol ............................................................... 35
1
2
3
1
2
1
2
3
4
5
6
7
8
9
TC-Mi Deaerator
Cleaning paper Instruction Manual
In the unlikely event that there are any missing components or defects, please
contact your dealer.
TC-Mi
Turbidity Checker
Thank you very much for purchasing Turbidity Checker TC-Mi.
All of this instruction manual must be read before operation of the
Turbidity Checker for safe and proper operation.
This instruction manual should be kept for future reference such as
maintenance.
Instruction
Manual
The instruction manual is also available on the following website.
https://navi.optex.net/manual/05297/?lang=en

2 3
Keep the Power off during
installation and wiring
operations.
•
Do not apply strong impact or excessive force
to the TC-Mi unit.
1 For safe use
•Please thoroughly read the “For safe use” before using the
TC-Mi properly.
•Because these precautions are related to failure or malfunction,
observe the precautions for use without fail.
Be sure to read this instruction manual in order
to use the Turbidity Checker TC-Mi properly.
Use the Turbidity Checker only for measurement of
water quality.
In order to use the TC-Mi properly, observe the following precautions.
Precautions which are the cause of failure:
" " denotes "Prohibited action", and " " denotes "Required action".
•
Do not disassemble or modify the product.
•
Turn off the Power immediately in the unlikely
event that there occur any abnormalities such
as smoke or abnormal noise. Otherwise it may
cause fire or an electric shock.
•
Do not wipe the product
with solvent. It may cause
failure.
•
To clean the product, first
wipe away lightly with a
clean soft cloth damped
by diluted mild detergent
solution and then wipe off
moisture with a dry clean
soft cloth.
Organic
solvent
Thinner
Power supply OFF
•
Be sure to use the power supply of 24 VDC.
Otherwise it may cause fire or electric shock.
24 VDC
• Make sure that TC-Mi is not
energized before installing
and wiring.
Turn OFF the power switch.
Disconnect the power cable
from the outlet.
Otherwise, it could result in
fire, electric shock, and
damage.

4 5
Deaerator
2 Names of the parts
Cable clamps
Cover
Panel
Display
Measurement value (During the setting, the setting value is displayed.)
0.1234
NTU Unit
During the setting, the setting item is displayed.
Operation keys
MODE button: enables to confirm the setting items and to determine the
setting values.
Upper and lower arrow buttons: Upper and lower arrow buttons are used to
change the setting values.
button increases a numeric value and button decreases the value.
Measurement bath DIP switch
Display
Operation keys
Fuse
Power supply
switch
Terminal block
MODE
Drain cap
Water outlet
Water inlet
Up and down buttons
[Inside panel]

6 7
Caution
Screws must be tightened securely. Otherwise, sufficient protection cannot
be obtained.
Caution
Fasten the cover fastening screws surely. If these screws are loose, turbidity
might not be measured correctly due to the light entered in the measurement
bath or dust mixed in the measurement water.
Screws for fixing the cover
Screws for fixing the cover
Open/close the cover by loosening/fastening the four cover fixing screws.
Open/close the panel by loosening/fastening the four cover fixing screws.
How to open / close the Cover
How to open / close the Panel
Caution
• Do not apply strong impact or excessive force to the joint. Otherwise, it may damage the
joint, as well as may cause crush, rupture, or disconnection of the tube.
•Water temperature must be between 0 and 40ºC.
•The unit must be isolated not to damage other machines or equipment in case of
water leakage.
•Use insert rings if necessary. To determine whether to insert rings or not, check the
specification of the tube. Selection of insert rings unmatched to the specification of
the tube may cause tube coming-off and water leakage.
•Follow the precautions below when attaching the tube.
- The cutting section must be right angle.
- Outer circumference must have no damage.
- The tube must not be shaped like an ellipse.
- The tube must be fully inserted to the end.
- Ensure that the tube is securely inserted and cannot come off after attached.
How to connect / disconnect the tube
Water outlet
Water inlet
MODE
Tube fitting
Connecting
Insert the tube to the tube
fitting.
Disconnecting
Pull out the tube while push the
lip of the tube fitting.
①
②
Applicable tube diameter for water inlet:
Nylon tube: 8 +/- 0.1 mm dia.
Urethane tube: 8 +/- 0.15 mm dia.
Applicable tube diameter for water outlet:
Nylon tube: 10 +/- 0.1 mm dia.
Urethane tube: 10 +/- 0.15 mm dia.

8 9
Water outlet
Water inlet
MODE
How to attach / detach the Drain cap
Drain cap
Caliber φ12
①
②
How to attach / detach the Deaerator
Attach the Deaerator and fix it by using the fixing screws.
Deaerator
Attaching
Insert the Drain cap as far
as it goes.
Detaching
Pull out (②) while pressing down
the tip (①) of the Drain cap.

10 11
Turbidity Checker TC-Mi uses a method of 90 degree scattered light. In
this method, a light source illuminates the surfaces of matter suspended
in the water, and the light is scattered by these surfaces is detected by
a photo element installed at an angle of 90 degrees from the light axis
of the measured light. The turbidity is determined by the amount of the
scattered light.
3 Measuring principle
Light source
Photo element
Suspended matter
Measuring light
Scattered light
Measured water
Installing TC-Mi unit
1
• The signal output cable and the power cable
must not be bound together or put in the same
cable clamps.
•
The TC-Mi unit must be installed at the place
which is well-ventilated, and is not exposed to
direct sunlight.
4 Installation
Before installation, remove the cable from the power
supply, and after completion, wire the power supply
cable.
denotes "Prohibited action" denotes "Required action"
• For wiring the unit, use the bundled cable
clamps.
•
Securely tighten the panel fixing screws. When
the screws are loose, sufficient protection
cannot be obtained.
• Make sure that TC-Mi is not
energized before installing
and wiring.
Turn OFF the power switch.
Disconnect the power cable
from the outlet.
Otherwise, it could result in
fire, electric shock, and
damage.
Keep the Power off during
installation and wiring
operations.

12 13
Install the TC-Mi unit horizontally for all
directions (front/rear, right/left).
Install the TC-Mi unit on the wall. For the mounting pitch, see the figure below.
Horizontal for front/rear
Horizontal for right/left
Caution
230 mm
(Mounting hole: 7 mm dia.)
65 mm
2Wiring
Caution
•
Be sure to use the power supply of 24 VDC. Otherwise it may cause fire or electric
shock.
•
Before installation, turn off the power supply switch, and then wire the power
supply cable. Otherwise it may cause fire or electric shock.
Terminal block
• Compatible cable diameter with the Cable Clamps is 6 to 8 mm
Digital
communication
(RS485)
Power Supply
(24 VDC)
Self-checking
or Alarm
output (O.C.)
4-20 mA
signal output
Reference
For the digital communications, refer to page 31, "11 Digital Communications".
(－) (＋)
RS485 Analog
(4-20 mA)
signal
output
Ｂ Ａ
Spare Self-checking or Alarm output (O.C.) Spare
F.G.
Power
supply
24 VDC
ON
OFF
FUSE
500 mm min.

14 15
Setting the DIP switch
3
▼▲
ON
123456 7 8
Up and down buttons
DIP switch
▲ button increases a numeric value and
▼ button decreases the value.
5 Operation start
Turn on the power
Turn on the power, then the display shows measurement value.
Attaching the panel
Attach the panel with screws (see page 6, "How to open / close the Panel").
Passing water
Start passing water through the TC-Mi unit.
•If leaking from the inlet passage, the outlet and the drain, check the connection of the
tubes, joints and drains.
•If the tube vibrate, fix the tube.
I
O
Power supply switch
Caution
•Make sure that the panel is attached securely. High water pressure may cause
water leakage, which could result in malfunction.
•Adjust the water flow rate to 100 - 200 mL/min.
Caution
Screws must be tightened securely. Otherwise, sufficient protection cannot be obtained.
1
2
3
1
2-3
4
5
SW Description
6
7-8
The 4-20 mA signal output can be kept during maintenance. Turn ON SW1
during maintenance.
ON: Hold OFF: Normal measurement
Do not use.
The standard substance of the calibration curve can be selected.
To select formazin, turn OFF SW5.
To select polystyrene, turn ON SW5.
If polystyrene is selected, 度is set for the turbidity unit automatically.
The measurement range can be
selected.
Do not use.
Fine adjustment of lower limit 4 mA and upper limit 20 mA of analog signal
output can be made.
1) Turn ON SW2.
2)
As confirming the reading of the connected equipment such as a recorder,
use the up and down buttons
▼▲ to fine-adjust the 4 mA lower limit.
3) Turn OFF SW2.
4) Turn ON SW3.
5)
As confirming the reading of the connected equipment such as a recorder,
use the up and down buttons
▼▲ to fine-adjust the 20 mA lower limit.
6) Turn OFF SW3.
Caution
Make the fine adjustment of lower limit 4 mA firstly. And then make the
fine adjustment of upper limit 20 mA. Otherwise the value of the upper
limit 20 mA cannot be adjusted accurately.
Caution
To change the measurement range via digital communication, turn OFF
SW7 and SW8.
OFF
SW7 SW8
Measurement range
OFF
OFF
OFF
ONON
ON
ON
0-100
0-20
0-2
0-5

16 17
Pass water until the water level becomes a certain.
If the water is overflowing from the measuring tank, check the measured water flow rate
and the clogging of the outlet.
Check the displayed measurement value to see if the measurement water is in stable
condition.
Attaching the cover
Checking the measurement value
Attach the cover by using screws (see page 6, "How to open/close the cover").
Caution
When passing the water for the first time, it may take time until the measurement
value becomes stable. Clean the measurement tank and the Deaerator as needed.
Checking water level
Caution
Fasten the cover fastening screws surely. If these screws are loose, turbidity might
not be measured correctly due to the light entered in the measurement bath or dust
mixed in the measurement water.
4
5
6
6 Operation
Setting
1
Measurement value is displayed after the unit is activated.
Each time the button is pressed, the setting item is changed.
Press and hold the button for 2 seconds or more to check or change the
setting.
Use the button to change the setting value. Pressing and holding the
button keeps changing the displayed value.
0.1234
NTU
1
2
Press and hold button
Measurement value display
Signal output response time
Turbidity unit selection
Offset adjustment
LCD contrast adjustment
Digital communication setting display
Output selection
(Self-Checking / Alarm)
Noise reduction setting
Use button for change, and button for determining
Use button for change, and button for determining
Alarm level setting
Use button for change, and button for determining
Use button for change, and button for determining
Use button for change, and button for determining
Use button for change, and button for determining
Use button for change, and button for determining
Return to the measured value display by the button.
* Displayed only when alarm output is selected
Use button for change, and button for determining
* Displayed only when alarm output is selected
Alarm timer setting