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PDF K7L-AT50D Data sheet ( Hoja de datos )
| Número de pieza | K7L-AT50D | |
| Descripción | Liquid Leakage Sensor Amplifier | |
| Fabricantes | Omron | |
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Liquid Leakage Sensor Amplifier with Disconnection Detection Function
K7L-AT50D/-AT50D-S
Detect disconnections between the Sensor
Amplifier and a Terminator connected to the
end of the Sensing Band.
• Constantly monitors for disconnections between the Sensor
Amplifier and the Sensing Band.
• Failure to detect liquid leakage due to disconnection in the
Sensing Band prevented.
• Notification of disconnection detection made using LED indica-
tor and transistor output.
• After a disconnection is detected, in order to avoid instability
due to further contact of the disconnected part, the operating
status is held.
• This model retains all the characteristics of the K7L-AT50 (de-
tection sensitivity, sensing ranges, and AC detection method).
• Meets UL/CSA standards. (See information on standards on
page 31.)
Application Examples
Liquid Leakage Detection for Measuring Baths in CMP
Devices
Detects liquid leaked to drain pans, and prevents damage to devices
and cleaning irregularities for wafers.
Detection of Liquid Leakage at Pipe Joints for Chemical
Liquid Tanks
Liquid leakage at a pipe joint can be detected by wrapping the Sens-
ing Band around the joint.
Detection of Condensation and Liquid Leakage at
Semiconductor Production Installations
Detects condensation inside cleaning devices and liquid leaked to
the surroundings.
Detection of Cleaning Fluid Level for Plating Devices
Detects the level of pure water inside plating baths. High sensitivity
allows high-accuracy control that prevents cleaning irregularities.
Liquid Leakage Sensor Amplifier with Disconnection Detection Function K7L-AT50D/-AT50D-S E-29
1 page  
Operation
I Disconnection Detection Function
Operation During Monitoring for Liquid
Leakage
• •Short-wave signals (2.5 VAC, 3.75 Hz) for liquid leakage detection
are output from terminal 4 of the K7L.
• •When there is no liquid leakage, the liquid leakage detection sig-
nals that are output are interrupted by the Terminator and the core
of the Sensing Band will be an open loop.
2.5 VAC (3.75 Hz)
Signals interrupted by
Terminator.
K7L
Operation at Liquid Leakage Detection
• When liquid leakage occurs within the sensing range, the liquid
leakage detection signals output from terminal 4 are input to termi-
nal 2 through the leaked liquid.
• The voltage of the input signals will vary with the resistance of the
leaked liquid. This voltage is compared with the detection level set
at the K7L.
• As a result of the comparison, if the K7L determines that liquid
leakage has occurred, the K7L’s output LED will light, and the liquid
detection output will either turn ON or OFF.
K7L
Operation During Monitoring for
Disconnection
• Output of disconnection detection signals starts within 2 s of power
being supplied to the K7L and is repeated at 7-s intervals.
• Disconnection signals are DC signals of 10 V max. that are output
for approximately 200 ms. During this time, the K7L is in disconnec-
tion monitoring mode, i.e. it monitors for disconnections only and
the liquid leakage detection signals are stopped.
• If there is no disconnection, the disconnection detection signals
(10 VDC) that are output pass through the Terminator and return to
the K7L. The K7L takes this as normal, i.e., there is no disconnec-
tion.
10 VDC max., 200 ms
Disconnection detection signals
are not interrupted by the Termi-
nator and return to the K7L.
K7L
Operation at Disconnection Detection
• If there is a disconnection, the signals will be interrupted at the
place where the disconnection occurred, and will not return to the
K7L.
• If the signals do not return, when the K7L is in disconnection moni-
toring mode it will determine that a disconnection has occurred.
The output LED will flash, and the disconnection output will turn
ON.
Signals are interrupted where the
disconnection occurred.
K7L
Note: 1. Disconnection detection is only performed between terminals 2 and 4. Therefore, be sure to connect the Sensing Band between terminals
2 and 4.
2. The K7L will switch from liquid leakage detection to disconnection detection if either of the following conditions occur while liquid leakage
is detected.
• Disconnection occurs between the K7L and the place where liquid is leaked.
• While liquid leakage is detected, disconnection occurs between the place where liquid is leaked and the Terminator (F03-20T) and,
subsequently, the leaked liquid is removed (e.g., wiped up or dried).
3. During disconnection detection, liquid leakage will not be detected. Once disconnection has been detected, reset the power supply to
stop disconnection detection.
Liquid Leakage Sensor Amplifier with Disconnection Detection Function K7L-AT50D/-AT50D-S E-33
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet K7L-AT50D.PDF ] | |
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