Optex SS Checker SC-T4 User manual

SC-T4
Thank you very much for purchasing OPTEX
Transmitter SC-T4.
All of this instruction manual must be read before
operation of the Transmitter SC-T4, for safe and proper
operation.
This instruction manual should be kept for future
reference such as maintenance.
Transmitter
Instruction Manual
2007.7 59-1362-1
For more information on OPTEX products, contact your
dealer or visit our website listed below;
OPTEX CO., LTD.
5-8-12 Ogoto Otsu Shiga 520-0101 Japan
tel : [phone]
fax : [phone]
E-mail : [e-mail]
website : http://www.optex.co.jp/env/eng/
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The Contents of Packaging
Transmitter
Instruction Manual20 Y-terminal
Mounting Bracket
2 Transmitter Fixing Screw
In the unlikely event that there are any missing components or defects,
please contact your dealer.
SC-T4
Thank you very much for purchasing OPTEX
Transmitter SC-T4.
All of this instruction manual must be read before
operation of the Transmitter SC-T4, for safe and
proper operation.
This instruction manual should be kept for future
reference such as maintenance.
Transmitter
Instruction Manual
0 1
Table of Contents
1.For safe use
2.External Features
3.Installation
Installation
Wiring
Extension of Detecter Cable
4.Operation Panel
5.Operation
Calibration
Each Setting
0(ZERO)/Span - Adjustments
Alarm Level,Alarm Timer,Signal Output
Response Time,Signal Output Range
(1) Alarm Relay Output Setting
(2) Signal Output Response Time Setting
(3) Signal Output Range Setting
6.Fine Adjustment of Signal Output
7.Correction
8.Error Indication
9.Troubleshooting
10.Maintenance
11.Specifications
12.Dimensions
1
2
4
6
6
7
8
9
10
10
10
12
13
13
16
17
19
21
22
23
24
25
25
………………………………………………………
………………………………………………
………………………………………………………
……………………………………………………
……………………………………………………………
……………………………
…………………………………………………
…………………………………………………………
……………………………………………………
…………………………………………………
……………………………
………………
………………………
………
……………………
………………………
…………………………………………………………
…………………………………………………
…………………………………………………
……………………………………………………
……………………………………………………
………………………………………………………
2
3
1
2
3
4

Power (OFF)
2 3
・Be sure to use the power supply of
100 to 240 VAC.
Otherwise it may cause fire or
electric shock.
・Do not wipe the
Transmitter with solvent.
It may cause failure.
・To clean the
Transmitter, 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.
100 to 240 VAC
Organic
Solvent
Thinner
etc.
・There are high
voltage parts inside
the Transmitter.
Failure to observe
this precaution may
cause fire or an
electric shock. ・Do not give a strong shock to the
Transmitter.
・Do not press the CLEAN button, while
the SS Checker (Detector)is in the air.
・Make sure that the Cover is locked
without fail. Otherwise, protective
structure may not function adequately.
Keep the Power off during
installation and wiring operations.
・Use Cable Clamps attached to the
transmitter for wiring. When the piping
are directly connected with the
transmitter, take a corrective action
such as caulking against intrusion of
gas because corrosive gas is in danger
of intruding through the piping, etc. into
the Transmitter. ・Do not bind the signal output cable with
the power cable or do not put them in
the one Cable Clamp.
・Install the transmitter
with attached
Mounting Bracket.
・Install the transmitter at a place
ventilating well and avoiding direct
sunlight.
・Do not disassemble or modify the
Transmitter. Disassembly or
modification may cause fire or an
electric shock because there are high-
voltage parts inside the Transmitter.
・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.
Please thoroughly read the "For safe use" before using the SC-T4
properly.
Because these precautions are related to failure or malfunction,
observe the precautions for use without fail.
In order to use the SC-T4 properly,
observe the following precautions.
Precautions which are the cause of failure:
The SC-T4 is used exclusively to SS Checker (Detector).
Accordingly, do not connect other equipment.
[Be sure to read this instruction manual in order
to use the Transmitter SC-T4 properly.]
1For safe use
" " denotes "Prohibited action", and " " denotes "Required action".

4 5
Minus Indicator
Signal Output Response Time Indicator
During Signal Output Response Time setting: Blinking
SPAN Indicator
During Span Adjustment: Blinking
During Signal Output (4mA)Adjustment: On
During Signal Output (20mA)Adjustment: Blinking
ZERO Indicator
During ZERO Adjustment: Blinking
During Signal Output (4mA)Adjustment: Blinking
During Signal Output (20mA)Adjustment: On
Transmitter
Operation panel
Display
2External Features
Cover
Cable Clamps
Key Hook
Lock Lever
Power SwitchCircuit Breakers
Terminal Block
Operation Buttons
Display
Terminal Cover
Alarm Level Indicator (Green)
Alarm Timer Indicator (Green)
Warning Indicator (Red)
How to open the Cover
How to close the Cover
・Make sure that the Cover is locked without fail. Otherwise, protective structure may
not function adequately.
Cover Opening & Closing Procedure
1. Slide up the Lock Lever. 2. Pull the Cover.
1. Close the Cover securely. 2. Slide down the Lock Lever
until it stops.
CAUTION:

6 7
3Installation
Fit the Mounting Bracket attached to the
Transmitter with the Fitting Screws.
1Install the Mounting Bracket on the wall
and so forth. For mounting pitch, refer
to the Fig. to the right.
Installation1
125mm
186mm
(Mounting Hole Φ9)
・Install the Transmitter at a place ventilating well and avoiding direct sunlight.
・Install the Transmitter with Mounting Bracket.
・Close the Cover securely after installation is completed.
CAUTION:
・If there is a projection on the mounting surface, separate
40 mm or more from the upper Mounting Holes of the
Mounting Bracket (See Fig. to the right).
40 mm or more from the
center of the upper
mounting holes
CAUTION:
2
・Make sure that the Circuit Breaker is normal (OFF)position (Refer to [8]
Troubleshooting).
Wiring
①−⑳・Compatible cable diameter with the Cable Clamps is 6 to 8 mm.
①−⑦・Use a shielded cable with nominal sectional area of 0.2 to 1.25 mm
2
for the
Detector Cable.
・For extension of the Detector Cable, refer to [3]Detector Cable Extension. Use
a device such as a Pull-box if necessary.
⑨−⑩・Use a shielded cable with nominal sectional area of 0.75 to 1.25 mm
2
for a
Signal Output Cable.
・For connection to the Signal Output terminal, load resistance should be 300 Ω
Max (including wiring resistance).
⑪−⑯・For connection to the Self Checking Relay Output terminal and Alarm Relay
Output terminal, load resistance should be 240 VAC and 1A Max.
Although a protective circuit is built in to prevent from overcurrent due to
thunderbolt, it is recommended to use fuses with rated current of 2A Max for the
purpose of improvement of safety.
⑱・Carry out grounding work.
⑲−⑳・Use a cross-linked polyethylene insulating vinyl sheath cable with nominal
sectional area of 0.75 to 1.25 mm
2
for the power cable.
・Use a circuit breaker with rated current of 2A or more for the power source of
the SC-T4.
2
・Keep the Power off during wiring operations. Otherwise it may cause fire or an
electric shock.
・Wire the Power Cable, at the end of wiring operation.
CAUTION:
12345678910 11 12 13 14 15 16 17 18 19 20
F.G. Spare Spare
CalibrationSignalOutput
AlarmRelay AlarmRelay AlarmRelay SelfChekingRelay SelfChekingRelay SelfChekingRelay
SelfCheckingInput
AnalogSignalInput
AnalogSignalOutput AnalogSignalOutput
AnalogSignalInput
PowerSupply PowerSupply
12VPowerSupply 12VGround
ShieldLine
(Blue)(Brown)(Black)(White)(Green) (Red)
COM NCNOCOM NCNO
−＋− ＋− ＋
ControlPanel
etc.
Detector
AC100240V
50/60Hz
Recorder
etc.
SelfChecking
RelayOutput Alarm RelayOutput
4‑20mA
〜
Controller Terminal Block
Reference:
・When the Detector is in the air, analog (4-20mA)signal output becomes
approximately 5mA.

8 9
3
Nominal sectional area
0.2 [mm2]
0.3 [mm2]
0.5 [mm2]
0.75 [mm2]
Max. cable length X[m]
10 [m]
20 [m]
40 [m]
50 [m]
The standard Detector Cable is 10m. The Detector Cable shall be
extended by referring to the Table below. Use a device such as a Pull-box
if necessary.
Extension of Detector Cable
Detector Cable length X[m]
Pull-box, etc.
The ENT button saves the numerical values entered and terminate the
setting change operation.
Enter a numerical value (0, 1, 2, ..., 9)into the selected digit using the
upper and lower arrow buttons . button increases a numeric
value and button decreases the value.
Press the right and left arrow buttons simultaneously to carry out
Fine Adjustment of Signal Output Low Limit (4mA).
Press the upper and lower arrow buttons simultaneously to carry out
Fine Adjustment of Signal Output High Limit (20mA).
Move the digit to be entered using the right and left arrow buttons
(0.1 digit 1 digit 10 digit 100 digit 1000 digit).
At this time, the selected digit blinks.
The CAL button carries out calibration.
Press the calibration button for 2 seconds or more to carry out calibration.
The MODE button makes sure of each setting. To change the setting
value, select an item and then keep pressing the MODE button for 2
seconds or more.
The CLEAN button wipes the Detector Windows.
To wipe the Detector Windows, press the CLEAN button for 2 seconds or
more.
The CANCEL button cancels the setting change operation and return
to the condition prior to change.
Operation Panel
4

10 11
Operation
5
2
Calibration
Each setting
※Air bubbles on the Detector Windows can be removed by wiping.
Pip
1
Be sure to carry out calibration according to the following procedure
before using the SC-T4.
4When pressing the CAL button, "CAL" is
displayed. "CAL" blinks during calibration.
3After accustoming the Detector to water temperature for 5
minutes or so, make sure that air bubbles are not attached
on the Detector Windows and press for 2 seconds or
more.
5When calibration is completed, the operation panel blips twice and
the Display turns into normal measurements indication.
2Immerse the Detector in distilled water or ion-exchange water.
1Clean the Detector and the Detector Windows.
Every time the MODE button is pressed, the Display is changed into
each setting. To change the setting value, select the item and then press
for 2 seconds or more.
Factory setting and setting range are as shown in the Table below.
Alarm Level
Alarm Timer
Signal Output Response Time
Factory setting
OFF
OFF
OFF
Setting range
1 −Span-Adjusted value
1 −120 minutes
1 −120 seconds
●Every time the MODE button is pressed, the display is changed
as follows:
Signal Output High Limit (20mA)
Signal Output Low Limit (4mA)
Signal Output Response Time
Alarm Timer
Alarm Level
Span-Adjustment
0 (ZERO)-Adjustment
Measurements Indication
Ex: The measurement value : 1000 mg/l
Ex: Signal Output Response Time : 10 seconds
Ex: Alarm Timer : 60 minutes
Ex: Alarm Level : 125 mg/l

12 13
3
・Before making the 0-Adjustment, be sure to clean the Detector Windows.
・Before making the 0-Adjustment, be sure to carry out calibration.
・After making the 0-Adjustment, be sure to make the Span-Adjustment.
0 (ZERO) / Span - Adjustments
CAUTION:
Be sure to carry out calibration before setting these operations.
4
3
After cleaning the Detector Windows, immerse the Detector
in distilled water or ion-exchange water.
5
7
Cover one of the Detector Windows completely to
be light-shielded for 30 seconds or more.
6
2
Press and select the 0-Adjustment.
1
After accustoming the Detector to water
temperature for 5 minutes or so, make sure that
air bubbles are not attached on the Detector
Windows. And press for 2 seconds or more,
"ZERO" blinks on the Display.
When the Display is not "0", use to change the Display into
"0" indication. When the display shows "0", press .
Pip
Press and select the Span-Adjustment.
Pip Pip
CAUTION:
・When Err4, Err5, or Err6 is displayed, the SC-T4 is out of the setting range, or the
Detector is not immersed in clean water during the 0-Adjustment, or the Detector
Windows may not completely be light-shielded during the Span-Adjustment.
When the Display is not "1000", use to change the
Display into "1000" indication. When the display shows "1000",
press to terminate the 0 / Span -Adjustments.
8
Press for 2 seconds or more, "SPAN" blinks
on the Display.
Pip
Pip Pip
4
Alarm Level, Alarm Timer, Signal Output Response Time,
Signal Output Range
The Alarm Level Indicator appears when the measurements
get higher than the Alarm Level. Both the Alarm Timer
indicator and Alarm Level Indicator blink when the
measurements get longer and higher than the setting value
of the Alarm Timer and Alarm Level. And in this case, Alarm
Relay Output will be produced.
When the measurements get higher than the Alarm Level continuously
beyond the time set by the Alarm Timer, the Alarm Relay Output will be
produced.
Although the measurements get
higher than the Alarm Level, since
higher period is shorter than that of
the Alarm Timer, Alarm Relay
Output will not be produced.
When the measurements
become lower than the
Alarm Level, the Alarm
Relay Output is released.
(Higher)
Alarm Relay Output
Alarm Level
(Lower)
Alarm Timer Alarm Timer
time
The Alarm Relay Output will be produced.
While the measurements values are
higher than the Alarm Level, the Alarm
Relay Output will continue to be produced.
Alarm Relay Output Setting1
These setting is set for OFF as a factory setting.
Make setting as occasion demands.
Ex: At the time of
Alarm Relay Output

14 15
Alarm Level can be set for 1 to Span-Adjusted value or OFF.
・Setting unit is 1 mg/l.
・The Alarm Level is set for OFF as a factory setting.
Alarm Level Setting
Ex: To set the Alarm Level for 30 mg/l ;
4Press to terminate the Alarm Level Setting.
3Enter "30" on the Display.
2
1
Press for 2 seconds or more, the
Alarm Level Indicator blinks.
Press and select the Alarm Level.
Pip
Pip Pip
Move the digit to be entered using the right and left arrow buttons
(1 digit 10 digit 100 digit 1000 digit).
At this time, the selected digit blinks.
・
・
・
Reference ・
Enter a numerical value (0, 1, 2, ..., 9)into the selected digit using the
upper and lower arrow buttons . button increases a numeric
value and button decreases the value.
While pressing buttons, the values displayed are continuously
changed.
Reference:
・To cut off the Alarm Relay Output, enter "0". Then "OFF"appears on the Display. Next,
press .
To cancel the Alarm Level Setting, press .
CAUTION:
・When Err6 is displayed, the value is out of the setting range.
Alarm Timer can be set for 1 to 120 minutes or OFF.
・Setting unit is 1 minute.
・The Alarm Timer is set for OFF as a factory setting.
Alarm Timer Setting
Ex: To set the Alarm Timer for 60 minutes ;
3Enter "60" on the Display.
2
1
Press for 2 seconds or more, the
Alarm Timer Indicator blinks.
Press and select the Alarm Timer.
Pip
Pip Pip
・To change the Display for the Measurements Indication mode, press
again.
4Press to terminate the Alarm Timer Setting.
Move the digit to be entered using the right and left arrow buttons
(1 digit 10 digit 100 digit).
At this time, the selected digit blinks.
・
・
・
Reference ・
Enter a numerical value (0, 1, 2, ..., 9)into the selected digit using the
upper and lower arrow buttons . button increases a numeric
value and button decreases the value.
While pressing buttons, the values displayed are continuously
changed.
Reference:
・To cut off the Alarm Timer, enter "0". Then "OFF"appears on the Display. Next,
press .
To cancel the Alarm Timer Setting, press .
CAUTION:
・When Err6 is displayed, the value is out of the setting range.
・To change the Display for the Measurements Indication mode, press
again.

16 17
Signal Output Response Time Setting2
Signal Output Response Time can be set for 1 to 120 seconds or OFF.
・Setting unit is 1 second
・The Signal Output Response Time is set for OFF as a factory setting.
Ex: To set the Signal Output Response Time for 10 seconds ;
3Enter "10" on the Display.
2
1
Press for 2 seconds or more, the
Signal Output Response Time Indicator
blinks.
Press and select the
Signal Output
Response Time
. Pip
Pip Pip
Signal Output Range Setting3
Signal Output Range can be set as follows.
・"High Limit"−"Low Limit"≧Span-Adjustment value ／5
Ex) when the setting value of Span-Adjustment is changed to
2000mg/l, the Signal Output Setting Range is as follows:
"High Limit"−"Low Limit" ≧400 ( ＝2000 ／5)
・The Signal Output Range is default at 4mA for the 0-Adjustment
value and 20mA for the Span-Adjustment value.
Ex: To set the
The Signal Output Range for 100 〜300 mg/l ;
3Enter "100" on the Display.
2
1
Press for 2 seconds or more, the
The Signal Output Low Limit value is
displayed .
Press and select the The Signal
Output Low Limit .
Move the digit to be entered using the right and left arrow buttons
(1 digit 10 digit 100 digit 100 digit).
At this time, the selected digit blinks.
・
・
Reference ・
Enter a numerical value (0, 1, 2, ..., 9)into the selected digit using the
upper and lower arrow buttons . button increases a numeric
value and button decreases the value.
While pressing buttons, the values displayed are continuously
changed.
To cancel the Signal Output Low Limit Setting, press .
(1)Signal Output Low Limit Setting
Pip
※"-Lo-" and "the setting value" comes on
alternatively.
Pip Pip
CAUTION:
・The resolution of the Analog Signal Output change depending on the setting value of
the Span-Adjustment.
・The resolution of Analog Signal Output is 0.5 mg/l as a factory setting. When it is
necessary to get 0.1mg/L as the resolution of Analog Signal Output, set the Span-
Adjustment to "1000mg/l" and the Signal Output Range to "200mg/l".
4Press to terminate the Signal Output Response
Time Setting.
Move the digit to be entered using the right and left arrow buttons
(1 digit 10 digit 100 digit).
At this time, the selected digit blinks.
・
・
・
Reference ・
Enter a numerical value (0, 1, 2, ..., 9)into the selected digit using the
upper and lower arrow buttons . button increases a numeric
value and button decreases the value.
While pressing buttons, the values displayed are continuously
changed.
Reference:
・To cut off the Signal Output Response Time, enter "0". Then "OFF"appears on the
Display. Next, press .
To cancel the Signal Output Response Time Setting, press .
CAUTION:
・When Err6 is displayed, the value is out of the setting range.
・To change the Display for the Measurements Indication mode, press
again.
・
・To change the Display for the Measurements Indication mode, press
again.

18 19
CAUTION:
・When Err6 is displayed, the value is out of the setting range.
4Press to terminate the Signal Output Range High
Limit Setting.
3Enter "300" on the Display.
2
1
Press for 2 seconds or more, the
Signal Output High Limit value is
displayed .
Press and select the
Signal Output
High Limit .
Move the digit to be entered using the right and left arrow buttons
(1 digit 10 digit 100 digit 100 digit).
At this time, the selected digit blinks.
・
・
・
Reference ・
Enter a numerical value (0, 1, 2, ..., 9)into the selected digit using the
upper and lower arrow buttons . button increases a numeric
value and button decreases the value.
While pressing buttons, the values displayed are continuously
changed.
To cancel the Signal Output High Limit Setting, press .
CAUTION:
・When Err6 is displayed, the value is out of the setting range.
(2) Signal Output High Limit Setting
※"-Hi-" and "the setting value" comes on
alternatively.
Pip
Pip Pip
Fine Adjustment of Signal Output
6
Fine Adjustment of Lower Limit 4mA and Upper Limit 20mA of Signal
Output (4-20mA) can be made.
・When both right and left arrow buttons are pressed simultaneously, Signal
Output of 4mA will be produced irrespectively of the measurement value.
CAUTION:
・First make the Fine Adjustment of Lower Limit 4mA, and then make the Fine
Adjustment of Upper Limit 20mA.
・Otherwise the value of the Upper Limit 20mA cannot be adjusted accurately.
CAUTION:
Fine Adjustment of Lower Limit 4mA1
2
1
While making sure of the values displayed by the
connecting equipment such as recorder, make the Fine
Adjustments of the Lower Limit 4mA with the up and down
arrow buttons .
Simultaneously press both right and left
arrow buttons .
At this time, "-4-" is indicated in the Display.
And, "ZERO" blinks and "SPAN" comes on.
＋
4Press to terminate the Fine Adjustments of the Lower
Limit 4mA.
Reference ・To cancel the Fine Adjustment of the Lower Limit 4mA, press .
4Press to terminate the Signal Output Range Low Limit
Setting.
・To change the Display for the Measurements Indication mode, press
again.

20 21
・When both right and left arrow buttons are pressed simultaneously, Signal
Output of 20mA will be produced irrespectively of the measurement value.
CAUTION:
Fine Adjustment of Upper Limit 20mA2
2
1
While making sure of the values displayed by the
connecting equipment such as recorder, make the Fine
Adjustments of the Upper Limit 20mA with the up and
down arrow buttons .
Simultaneously press both right and left
arrow buttons .
At this time, "-20-" is indicated in the
Display. And, "ZERO" comes on and
"SPAN" blinks.
4Press to terminate the Fine Adjustments of the Upper
Limit 20mA.
Reference ・To cancel the Fine Adjustment of the Upper Limit 20mA, press .
＋
At this time, after making sure that the indicated values and
measured values by the official method have linear relationship
as shown below, calculate a Span-Adjusted value using
displayed values and measured values as close as possible to
the Span-Adjusted value.
Examine the correlation between values measured by the official
method and the values indicated by SC-T4 at a place where the
instrument is installed.
Indicated values Indicated values
1
2
The following calculating formula is used.
Span setting value = [Present Span-Adjusted value] x Measured
value (official method)/Indicated value (SC-T4).
Notes: The Span-Adjusted value set 1000 as a factory setting.
3
The Span-Adjusted value is changed into the following value by
referring to page 12([5] Operation (3) 0(ZERO)/Span-Adjustments).
When the indicated value is 800 mg/l and the measured value
according to official method is 600mg/L:
Span-Adjusted value =1000x600/800=750
・In the case of the Present Span-Adjusted value is 1000.
4
8
Measured values by the official method Measured values by the official method
・When Err4 or Err5 is displayed, the value is out of the setting range. The
available setting range of Span-Adjusted value is from 200 to 3000 mg/l.
CAUTION:
7Correction
Depending on the measuring environment, indicated value may differ
from the value by the official method. In this occation, correct the
indicated value using the Span-Adjustment function according to the
following procedure.

22 23
"Err 3" is indicated when the Analog Signal Input (4 to 20mA) from
the Detector is out of input range (lower than 3.5mA or upper than
22mA).
"Err 5" is indicated when 20mA Analog Signal Input at the time of
the Span-Adjustment is not within ±2mA.
"Err 4" is indicated when 4mA Analog Signal Input at the time of the
0-Adjustment is not within ±0.5mA.
"Err 6" is indicated when the setting range is exceeded.
"Err 2" is indicated when calibration is not carried out properly.
"Err 1" is indicated when the Detector is out of order, and so forth.
8
The SC-T4 has an Error Indication function to indicate improper
operation and occurrence of problem. There are six kinds of error
indications (Err 1 to Err 6), the meaning of which is as follows.
Error Indication
"Err 1" is indicated
on the Display,
and an alarm
indicator is lit up.
"Err 2" is
indicated on the
Display.
The Detector is out of
order, and so forth.
A Detector Cable is not
wired properly.
Check this according to the "Troubleshooting"
in an instruction manual for the Detector.
After checking the Detector Cable for
wiring, wire it properly.
"Err 3" is
indicated on the
Display.
"Err 4" is
indicated on the
Display.
The Detector needs repair. Contact your
dealer.
Carry out calibration once again. If "Err 2"
persists in indicating even when carrying
out calibration repeatedly, it is necessary
to make repairs. Contact your dealer.
The Display is
not turned on.
"Err 6" is indicated
on the Display.
"Err 5" is
indicated on the
Display.
The Detector is out of
order.
A Detector Cable is not
wired properly.
The Detector is out of
order.
A Detector Cable is not
wired properly.
The Detector is out of
order.
The Detector Windows
are soiled.
A Detector Cable is not
wired properly.
The setting is not made
properly.
The Transmitter is out of
order.
A Power Cable is not
wired.
A Circuit Breaker is at
the "Breaker On"position.
A Detector Cable is not
wired properly.
The Detector is out of
order.
The Detector Windows are not
light-shielded completely.
Calibration turns out a
failure.
After checking the Detector Cable for
wiring, wire it properly.
The Detector needs repair. Contact your
dealer.
After checking the Detector Cable for
wiring, wire it properly.
The Detector needs repair. Contact your
dealer.
After checking the detector cable for
wiring, wire it properly.
The Transmitter needs repair. Contact
your dealer.
After checking the internal wiring, wire
the Power Cable properly.
Get rid of possible cause of the circuit breaker being at the
projected position before depressing the Circuit Breaker.
The setting is out of range. Each setting should be
made within the range that Err 6 is not indicated.
After checking the Detector Cable for
wiring, wire it properly.
The Detector needs repair. Contact your
dealer.
Completely light-shield the Detector
Windows and make adjustments again.
By referring to an instruction manual of the Detector,
clean the Windows and make adjustments again.
Problem Cause Inspection and corrective action
Normal Position "Breaker On" Position
9Troubleshooting

24 25
Maintenance
Periodic inspection
Calibration
Long-term storage
When the Cover or the Display is soiled, 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.
Inspect the following items every 3 months:
・Make sure that the Transmitter is fixed securely.
・Make sure that the Transmitter is not damaged.
・Make sure that the screws of the Terminal Block are not rusted.
The SC-T4 is designed so as to make measurements stably for a long time. In
order to maintain the reliability of measurement, however, carry out calibration at
least once a year (Refer to page 10 ([5] Operation (1) Calibration)).
When the SC-T4 is not used for a prolonged period, turn off the Power Switch
and disconnect the Power Cable from the power supply prior to safekeeping.
10 Maintenance
CAUTION:
・Do not wipe the transmitter with solvent such as Thinner.
Calibration Output
Power Supply for Sensor (12 VDC)
Signal Output (analog 4-20mA, resistance load of 300Ωor less)
Self-checking Relay Output (non-voltage C-contact capacity 240 VAC, 1A resistance load)
Alarm Relay Output (non-voltage C-contact capacity 240 VAC, 1A resistance load)
Detector signal input (analog 4-20mA, input resistance approx.100Ω)
Self-checking input
IEC 60529 / IP65 (jetproof type)
AC100 −240V±10% 50/60Hz
Power supply
Dimensions
SC-T4
0.1mg/l (0-49.9mg/l), 1mg/l (50-1000mg/l)
Output
Power
consumption
Normal: 8VA or less, during washing: 16VA or less
(including detector, at the time of analog signal input/output of 20mA)
Display resolution
Input (detector)
The specifications herein are subject to change without prior notice due to improvements.
11 Specifications
12 Dimensions
[mm]
16
38
75
34 34 34 34
220
Installation pitch 186
Installation pitch 125
240
(Max. 190)
162
Installation hole φ9
Applicable cable
diameter
φ6~8
Hole for
padlock
φ7
Model No.
Main material
Operating temperature -20 to +50 ℃, humidity 95%Rh or less (Avoid direct sunlight)
Polycarbonate
Degree of protection
HxWxD = approx.162x240x75 mm
Weight Approx. 1.6kg (including the Mounting Bracket)