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E8F2 Schematic ( PDF Datasheet ) - Omron

Teilenummer E8F2
Beschreibung Digital Pressure Sensor
Hersteller Omron
Logo Omron Logo 




Gesamt 22 Seiten
E8F2 Datasheet, Funktion
Digital Pressure Sensor
E8F2
Pressure Sensor with
Easy-to-Read LED Display
Pressure status can be checked at a glance
from the red digital pressure value and analog
bar displays.
Measurement pressure is averaged by the
chattering prevention function to prevent
incorrect outputs due to momentary pressure
changes.
The automatic teaching function teaches
pressure values for good and bad products.
Industry’s smallest models at just 28 × 28 ×
29 mm.
Be sure to read Safety Precautions
on page 6.
Ordering Information
Sensors
Pressure range
Positive pressure
Negative pressure
0 to 100 kPa
0 to 1 MPa
0 to 101 kPa
ON/OFF output
Open collector
(two independent outputs)
Linear output
1 to 5 V
NPN output
E8F2-A01C
E8F2-B10C
E8F2-AN0C
Model
PNP output
E8F2-A01B
E8F2-B10B
E8F2-AN0B
Accessories (Order Separately)
Appearance
Name
Model
Remarks
Mounting Bracket E89-F3
Provided with the E8F2.
Panel-mounting
Bracket
E89-F4
Spacer provided.
http://www.ia.omron.com/
(c)Copyright OMRON Corporation 2007 All Rights Reserved.
1






E8F2 Datasheet, Funktion
Safety Precautions
Refer to Warranty and Limitations of Liability.
WARNING
This product is not designed or rated for ensuring
safety of persons either directly or indirectly.
Do not use it for such purposes.
Precautions for Correct Use
Do not use this product in atmospheres or environments that exceed
product ratings.
Installation
Do not use the Sensor in an environment subject to corrosive or
combustible gas.
Wiring
If no linear output is used, cut the gray lead wire short and apply
insulating tape to the lead wire so that it will not come into contact with
any other terminal.
Mounting
x Do not apply a tensile strength in excess of 50 N to the cables or
connectors.
x The pressure port (made of aluminum die-cast) is fixed with tapered
R(PT) 1/8 male screws and M5 female screws. When using tapered
screws, use tapered Rc(PT) 1/8 female screws.
x Wrap the tapered R(PT) 1/8 male screws with sealing tape to
prevent any leakage. Tighten the male screws to a torque of 10 N·m
max.
x Tighten M5 female screws to a torque of 2 N·m max.
x Tighten each male screw by using a 12-mm wrench to hold its
hexagonal head, not its body.
E8F2
Adjustments
x Filter the gas with an appropriate air filter so that the applied gas will
be free of moisture or oil.
x Be sure to use the Sensor under the rated pressure.
x When setting the set pressure of the ON or OFF point of the output
transistor by pressing the mode selection key, use a manometer if
precise pressure settings are required. The Sensor has a display
error of ±3% FS±1 digit at room temperature. Refer to Display
accuracy in Ratings and Specifications.
x Turning ON the power
The Sensor is ready to operate 0.5 s after it is turned ON. When the
load and Sensor are connected to separate power supplies, be
sure to turn ON the Sensor first.
Others
Make sure the Sensor does not get wet.
E8F2
Hexagonal head
x When attaching the Mounting Bracket to the Sensor, make sure
that each M3 screw is tightened to a torque of 0.5 N·m max.
http://www.ia.omron.com/
(c)Copyright OMRON Corporation 2007 All Rights Reserved.
6

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E8F2 pdf, datenblatt
Operating Procedures: Pressure Sensors
Pressure Setting Mode
The E8F2 outputs signals based on the measurement values
and can be used to control external devices, such as valves
and vacuum equipment.
To control external devices, a reference value is set, and
settings are made so that the output turns ON if the
measurement value exceeds the reference value, and OFF if
it falls below the reference value. (This relationship can also
be reversed.)
Pressure setting mode is used to set the point at which output
turns ON (ON point) and the point at which output turns OFF
(the OFF point). There are two setting methods: manual and
auto-teaching.
This section describes these setting methods for the ON
points and OFF points. (Note: The following description
applies when the output type is set to normally open.)
Also, the hysteresis mode and window mode are determined
by the relation between the ON point and the OFF point.
(Refer to the following table for details.)
Mode
Relation between ON/OFF set values
Operating mode
Normally open
Normally closed
Hysteresis mode
Output
ON
ON-point set value > OFF-point set value
OFF
0
Output
ON
Pressure value
OFF SV ON SV
OFF
0
Pressure value
OFF SV ON SV
Output
ON
Output
ON
Window mode
ON-point set value < OFF-point set value
OFF
OFF
ON-point set value = OFF-point set value
0
Pressure value
0
Pressure value
ON SV OFF SV
ON SV OFF SV
The output will be unstable. Use hysteresis mode or window mode.
Note: Standard default settings: ON point = (-)30 kPa, OFF point = (-)27 kPa. Negative values are for the E8F2-AN0C only.
Manual Setting
Note: Manual setting can be performed if
is selected for the pressure setting method in the initial settings.
Manual setting
SET
Measurement mode
SET
SET 2
or
SET
RESET
SET
(alternately
displayed)
OUT1-ON point
SET
RESET
SET
(alternately
displayed)
OUT1-OFF point
SET
RESET
SET
(alternately
displayed)
OUT2-ON point
RESET
SET
(alternately
displayed)
OUT2-OFF point
RESET
SET
RESET
SET
RESET
SET
RESET
SET
Change the SV using and .
1. Press SET to enter the pressure setting mode, and and the set ON point for OUT1 will be alternately displayed.
2. Change the ON point (for OUT1) using and .
3. Press SET to select the displayed ON point, and
and the set OFF point for OUT1 will be alternately displayed.
4. Change the OFF point (for OUT1) using and .
5. Press SET to select the displayed OFF point, and and the set ON point for OUT2 will be alternately displayed.
6. Change the ON point (for OUT2) using and .
7. Press SET to select the displayed ON point, and
and the set OFF point for OUT2 will be alternately displayed.
8. Change the OFF point (for OUT2) using and .
9. Press SET to select the displayed OFF point, and and the set ON point for OUT1 will be alternately displayed.
Returning to Measurement Mode
Saving the set value·············Press SET for approx. 2 s. (Valid for any set value display.)
Not saving the set value······Press and at the same time. (Valid for any set value display.)
http://www.ia.omron.com/
(c)Copyright OMRON Corporation 2007 All Rights Reserved.
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