Sierra Monitor Corporation ZSE30 - Manual (Page 7)

•Do not use a pressure switch nearby a place where electric surges are generated.
Internal circuit elements of the pressure switch can deteriorate or break when equipment generating
a large surge (electromagnetic lifter, high frequency induction furnace, motor, etc.) is located near
the pressure switch. Provide surge preventives, and avoid interference.
•Do not apply the pressure switch to the load that generates electric surge voltage.
Relays or solenoid values generate electric surge voltage. When applying the pressure switch to
drive these loads directly, use the product equipped with surge absorber.
•The product is not resistive to a lightning surge defined in CE marking. Take measures to protect
against a lightning surge at the load side.
•Prevent foreign matter such as remnant of wires from entering this product.
Take proper measures for the remnant not to enter the pressure switch in order to prevent failure or
malfunction.
•Do not expose the pressure switch to vibration (less than 98 m/s 2 ), and impact (less than 100 m/s 2 )
Otherwise it can cause damage or malfunction.
•Follow the specified ranges of the operating fluid and maintain ambient temperatures.
The operating fluid and ambient temperatures should be in the range of 0 to 50 °C.
When operating at low temperature of 5°C or below, breakage or malfunction can occur to the
pressure switch due to freezing of condensed water in the pressurized air.
Take preventive measures against freezing. Installation of an air dryer is recommended in order to
remove condensed water contained in the measuring fluid.
Do not use the pressure switch in a place where temperature suddenly changes even if it stays
within the specified range.
•Do not expose the pressure switch to heat radiation from a heat source located nearby.
It can cause malfunction.
♦Adjustment and Operation
•Do not short-circuit the load.
The pressure switch indicates the error status when a load is short-circuited. However, excess
current can damage the pressure switch.
•Do not press the buttons with a sharp object.
It can cause damage to the setting buttons.
•A warm-up time of 20 to 30 minutes is needed for detection of low pressure.
The indication drifts about
±1% soon after the power is on.
•Do not touch the LCD during operation.
The indication on the LCD changes due to static electricity.
♦Maintenance
•Before performing maintenance, make sure to turn off the power supply, stop supplied air, release
the residual air in the piping into the atmosphere, and verify that the pneumatic system is open to
the air.
Otherwise an unexpected operation of the system component can occur.
•Perform maintenance and check regularly.
Otherwise an unexpected malfunction of the system can occur due to a malfunction of the pressure
switch.
•Perform a proper functional check and leak test after maintenance.
Stop operation when an abnormality is observed such that the device does not work properly or
there is a leakage of fluid.
Otherwise an unexpected malfunction of the system component can occur.
•Release condensed water regularly.
The flow out of the condensed water to secondary piping can cause a malfunction of pneumatic
devices.
•Do not use solvents such as benzene or thinner to clean the pressure switch body.
It can damage the surface of the body and erase the indication on the body.
Use a soft cloth to remove stains. For heavy stains, use a cloth soaked with diluted neutral detergent
and fully squeezed, then wipe up the stains again with a dry cloth.
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