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| 型号： | TS1024MBXX |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, XSS |
| 文件页数： | 4/5页 |
| 文件大小： | 124K |
| 代理商： | TS1024MBXX |
Specications which provide more details for the proper and safe use of the described product are available upon request.
All specications are subject to change without notice.
Sensors
TS-L, -M, -H Series
Mechanical Sensors
Powder Level Sensors
PRECAUTIONS
Adhere to the following recommendations to ensure stable opera-
tion of the programmable toner sensor.
Values shown here are guidelines for general design. Detection
sensitivity of sensors is inuenced by the material and shape of the
developer container that the sensor will be used with, and the
mechanism for carrying the developer. Refer to separate docu-
ments for special design specications.
1. The quantity of developer (toner carrier) around the sensor
face
The detection sensitivity will drop when the quantity of developer
around the sensor face (D in the diagram below) is low (below
5mm). Increasing the sensitivity of the sensor itself through the cir-
cuiting can compensate for this. However, as sensor sensitivity
increases, environmental and temperature resistance characteris-
tics deteriorate, causing decresed stability of operation. Design the
developer container and the mechanism for carrying the developer
so that there is a minimum of 6mm (D in the diagram below).
2. Influence of an external magnetic field near the sensor
If a DC magnetic eld is applied near the sensor, the sensors
working point will need to be changed correspondingly.
If the DC magnetic field strength changes depending on the indi-
vidual device, the working point of the sensor will need to be reset
depending on the DC magnetic eld. The best environment is one
where there is no DC magnetic eld. however if this is unavoidable,
it is recommended that you either apply a magnetic shield at the
source of the DC magnetic eld, or use the TS-M series that has a
magnetic shield core for the sensor.
If the DC magnetic field is strong, it may be necessary to use the
TS-M series possessing a magnetic shield core, or the highly sen-
sitive TS-H series with a large core for the sensor coil. As shown in
the diagram above, however, the carrier that is in the developer
may become trapped over the core, impairing the performance of
the sensor. (The TS-L series uses a small core so this situation
rarely occurs.)
3. Influence of conductive material near the sensor
A conductive material placed near the sensor can also change its
working point. If a certain distance is kept between them, normal
operation can be recovered by resetting the working point. How-
ever, if the conductor is quite close to the sensor, as in the diagram
below, the adjustment range for the working point may be
exceeded.
If the sensor is installed on a conductor such as aluminum, it may
not function at all since the driving power of the sensor coil will be
shorted. This phenomenon is most pronounced with the TS-L
series. The TS-M and TS-H series can be installed on conductive
surfaces, but the working point adjustment will vary widely from
installation to installation due to the close relationship between the
mounting and the uctuation margin of the working point. This
complicates adjustment procedures.
If the application requires installing a sensor on aluminum, working
point changes can be reduced rst by placing a plastic plate of at
least 30mm in diameter over the aluminum. Even with this
method, some variability in working point can be expected.
4. Causes of ripple of detection output
Ripple in the output detection occurs when the ow rate of devel-
oper around the sensor is unstable. Depending on the size of the
ripple, this can considerably lower control accuracy. For this reason
it is best to locate the sensor where the ow of developer is
smooth. The sensor itself contains a built-in lter for absorbing rip-
ples, so there are generally no problems with a normal level of rip-
ple. However if the size of the ripples exceed ordinary levels,
difculties such as those describe below may occur.
Developer
Toner sensor
Sensor face
D
External DC magnetic field H
TS-M Series
TS-H Series
A: Conductors such as aluminum plates
D < 5mm
A
AA
A: Conductors such as aluminum plates
AB
B
A
A: Conductors such as aluminum plates
B: Non-conductive material such as plastic
D > 30mm
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