Descripción
FLOW SWITCHES
Electrical Switch
The power switch is part of our product line Flow Meters category and subcategory level flow switches.
The electronic switch uses a solid state crystal accelerometer that provides an electrical output when it is deformed by the forces of vibration. The output is electronically converted into a signal proportional to velocity. This signal is compared with a preset limit and active a solid state relay if the limit is exceeded. No moving parts in the 440 vibration switches, except when configured with mechanical relays.
While the 440 costs more than a mechanical switch, which uses the same technology as sophisticated remote monitoring systems and provides most of the capabilities of these systems in 1 / 3 to 1 / 2 the cost per control point. An important feature of the switches is built in time delay. This prevents the alarm activation or closure of the functions of the transient increases in vibration levels.
It also avoids shutdown due to transitory vibrations that occur during startup. Almost all machines experience high vibration few seconds during boot before reaching the operating speed. When no time delay function is included, as with mechanical switches, the implementation causes vibration of a journey.
Often, the operator becomes the journey of creation to be able to get through commissioning. The resulting trigger level is too high to afford protection to the operating speed of the machine. Three second delay alarm trigger is standard on the switch. Alarm delays can be adjusted in the field in a range of 2 to 15 seconds.
Features:
• 4-20 mA output.
• Built in alarm delay time.
• Reduce false triggering.
• Rate of Fire provides protection at all frequencies.
• The sensitivity is not affected by the rotational speed of machinery.
• Analog line for setting limits.
• Contacts of solid state relay used for alarm and / or closing.
• Field setable for NO or NC.
• Remote Reset capability.
• Provision for self-test and calibration.
• Built-in transducer or optional remote transducer.
• Explosion proof models (450 Series) available.
• Comply with cast aluminum housings.
