Sierra Monitor Corporation PF5M - Manual (Page 5)

7 6
Names and Functions of Individual Parts
Power source display (green) : Turns on when power is supplied.
Flow display (green) : Flashing interval depends on the flow value.
As flow increases, flash interval is shortened.
The light turns to red when rated flow is exceeded.
Body : Flow sensor itself.
Flow adjustment valve : Orifice mechanism to abjust the flow.
Piping port : Connect port of piping.
Knurl : Used to fix the needle.
Through hole : Used to mount the flow sensor on a DIN rail or a panel directly.
IN
Power source display
Flow display Flow adjustment valve
Knurl
Piping port
Body
Through hole
Safety Instructions (continued)
NOTE
• Wire as short as possible to avoid the affect of noise and surge.
• Never use in the presence of explosive gases.
• Do not use in an area where magnetic field is generated to avoid
malfunction of sensor.
• Do not operate where the flow sensor is exposed to water.
• Do not use in an area containing oil or chemicals.
• Do not apply heat cycle to the flow sensor.
• Do not used in an area where surges are generated.
• Sensors are not equipped with surge protection against lightening.
• Do not use load generate surge voltage.
• Avoid foreign material such as wiring chips in the product.
• Avoid using sensors in an environment where the likelihood of
splashing or spraying of water, chemicals, and oil to avoid failure and
malfunction.
• Consider operating environment according to protection class.
• Do not mount the flow sensor where vibration (98m/s
2 or less) and
impact (490m/s 2 or less) do not exist to avoid failure and malfunction.
• Operation under low temperature (5 or less) leads to cause damage
or operation failure due to frozen moist in the fluid or air.
• Do not short circuit the load.
• Supply power when there is no flow.
• The flow sensor is compulsory turned off for 3s after power supplied.
• Maintenance and inspection should be performed periodically.
• Analogue output may fluctuate by 2 to 3% for 10 minutes after
supplying power to the flow sensor.
• Do not poke inside a piping port with a stick.
• A flow rate of the flow sensor, which has a restrictor, may change if the
needle turns due to vibration.
• The accuracy may fluctuate by 2 to 3% if a customer removes or
replaces piping by themselves.
• When the product is fixed with a screw using the through hole, please
tighten it with a 0.3Nm ± 0.05 or less of tightening torque. (Excessive
tightening may break the product.)