No.IP8S-OM00009
76
Caution on Handling
■
Operation
①
If the system is supposed to be in danger because of failure of the positioner, prepare the
system with a safety circuit to avoid danger.
②
Do not place electrical wiring in hazardous places while energized.
①
To prevent risks while pressure is supplied, do not touch areas surrounding driving
components such as actuators and valves.
②
Be sure to mount the body cover unit when using the positioner. IP 65 cannot be
guaranteed if the mounting condition of the body cover is incorrect. To achieve IP
capability, tighten the screws with the appropriate torque (2.8 to 3.0Nm
）
③
Balance current will change depending on the positioner orientation and supply pressure.
Adjust the balance current (parameter code: C60) every time the orientation and supply
pressure changes.
④
Adequately flush the inside of the piping before arranging it to prevent foreign substances
like chips from intruding into the positioner.
⑤
If the input current is shut off during use, the output of OUT1 will become 0MPa and the
output of OUT2 will reach its maximum regardless of the operating direction of the
parameter mode (parameter code: 200), whether direct or in reverse.
⑥
If reverse operation is selected in parameter mode (parameter code: 200), when power
supply is turned off, OUT1 output will become 0MPa and the positioner will start moving
toward input current 20mADC direction.
⑦
Immediately after the input current has been applied, it may take some time until the
positioner begins to operate.
⑧
Depending on the parameter
’s setting, the actuator will erratically extend
when an input
current of 4mA DC is applied.
⑨
The actuator opening might be unstable when a booster relay is used.
⑩
Although the operating direction can be changed by a parameter setting, the piping
should usually be replaced in such cases. In addition, when reverse mode (parameter
code: 200) is used, OUT1 output will become 0MPa and the actuator moves in the
direction of input current 20mA DC once the power supply has been shut off.
⑪
When replacing piping to change the operating direction, be sure to perform span
adjustment (parameter code: C70).
⑫
Be sure to use grounding to prevent noise from interrupting input current and static
electricity from breaking the positioner.
⑬
There is a capacitor for noise prevention between FG terminal (case) and each input /
output terminal of the positioner respectively. Therefore, avoid conducting withstand
voltage test or insulation resistance test between these terminal and case.
⑭
Pressure indicated by the pressure gauge included in positioner shall be used as a
guideline.
⑮
Indication needle of the pressure gauge included in positioner may malfunction when internal
mechanical parts or supply pressure to the positioner is frozen. To use pressure gauge under
0
o
C, attention should be taken so that inner parts of pressure gauge is not frozen.
Warning
!
Caution
!
A
