Head-separated
DP4
Digital Display
LED Bar Display
PRECAUTIONS FOR PROPER USE
DP4
785
•
This product is not a safety sensor. Its use is not
intended or designed to protect life and prevent
body injury or property damage from dangerous
parts of machinery. It is a normal pressure
detection sensor.
•
The DP4 series is designed for use with non-
corrosive gas. It cannot be used with liquid or
corrosive gas.
•
Displays measured pressure, settings, error
messages and key-protect status.
•
Red display when output is ON.
•
Green display when output is OFF.
Mode selection key
( )
Decrement key
(DOWN)
Increment key
(UP)
•
In the initial setting mode and
supplementary setting mode,
pressing the key changes the
set conditions.
•
In the pressure value setting
mode, pressing the key
changes the set value.
•
In the sensing mode, pressing
the key continuously for 4 sec.,
or more, displays the bottom
hold value.
In the sensing mode, if both keys are simultaneously
pressed continuously
, zero-point adjustment is done.
•
In the initial setting mode and
supplementary setting mode,
pressing the key changes the
setting item.
•
In the pressure value setting
mode, pressing the key
changes the set value.
•
In the sensing mode, pressing
the key continuously for 4 sec.,
or more, displays the peak hold
value.
Description
3
1
/
2
digit LCD display
with red and green
backlight
•
In the pressure setting mode, pressing the
key changes the setting item. In addition, if
pressed for 4 sec., or more, in Set Value 1
(P-1) or Set Value 4 (P-4) setting mode, the
setting mode will change to either Set Value 4
(P-4) or Set Value 1 (P-1) setting mode.
•
In the sensing mode, pressing the key
continuously for 4 sec., or more, can
set / cancel the key-protect.
•
In the sensing mode, pressing both lncrement
key and Mode selection key simultaneously
changes the mode to the initial setting mode.
Whereas, pressing both Decrement key and
Mode selection key simultaneously changes
the mode to the supplementary setting mode.
Function
1
2
3
4
(
(
MODE
Operation
•
If setting is impossible even with pressing the MODE key,
verify whether the key-protect function is enabled. Please
note that pressing down on the MODE key for an
extended moment will enable the key-protect function as
soon as the key is released.
•
If using the window comparator mode, set the pressure
value so that there is a difference of 3 digits, or more,
between Set Value 1 (P-1) and Set Value 2 (P-2). No
output will be possible with a 0 to 2 digit difference.
Functional description
DP
4
–101.3 kPa
DOWN
MODE
UP
1
4
2
3
Conditions in use for CE conformity
•
The DP4 series is a CE conformity product complying with
EMC Directive. The harmonized standard with regard to
immunity that applies to this product is EN 61000-6-2
(Note) and the following condition must be met to conform
to that standard.
Condition
Wiring
•
Make sure that the power supply is off while wiring.
•
Verify that the supply voltage variation is within the rating.
•
If power is supplied from a commercial switching regulator,
ensure that the frame ground (F.G.) terminal of the power
supply is connected to an actual ground.
•
In case noise generating equipment (switching regulator,
inverter motor, etc.) is used in the vicinity of this sensor,
connect the frame ground (F.G.) terminal of the equipment to
an actual ground.
•
If the used power supply generates a surge, connect a surge
absorber to the power supply to absorb the surge.
•
Do not run the wires together with high-voltage lines or power
lines or put them in the same raceway. This can cause
malfunction due to induction.
•
In order to reduce noise, make the wiring as short as possible.
Others
•
Use within the rated pressure range.
•
Do not apply pressure exceeding the pressure withstandability
value. The diaphragm will get damaged and correct operation
shall not be maintained.
•
Do not use during the initial transient time (3 sec. approx.)
after the power supply is switched on.
•
Avoid dust, dirt, and steam.
•
Take care that the sensor does not come in direct contact with
water, oil, grease, or organic solvents, such as, thinner, etc.
•
Do not insert wires, etc., into the pressure port. The
diaphragm will get damaged and correct operation shall not
be maintained.
•
Do not operate the keys with pointed or sharp objects.
Overcurrent due to short-circuit.
Pressure is being applied during
zero-point adjustment.
Applied pressure exceeds
the upper limit of displayable
pressure range.
Applied pressure exceeds the
lower limit (reverse pressure)
of displayable pressure range.
Applied pressure exceeds the
lower limit (reverse pressure)
of displayable pressure range.
Applied pressure exceeds
the upper limit of displayable
pressure range.
Positive
pressure and
compound
pressure types
Error message
Cause
Corrective action
•
The sensor should be connected less than 10 m
32.808 ft
from the power supply.
Note: The EN 50082-2 that previously applied to the products for conforming
to EMC Directive was replaced by EN 61000-6-2 starting April 1st,
2002.
Error messages
•
When an error occurs, take the following corrective action.
Switch off the power
supply and check the load.
Applied pressure at the
pressure port should be
brought to atmospheric
pressure and zero-point
adjustment should be
done again.
V
acuum
pressure
type
Positive
pressure and
compound
pressure types
V
a
cuum
pressure
type
Applied pressure
should be brought
within the rated
pressure range.