438D Vibration Switches (mm/sec)
An Economical Machine Monitor with Remote Sensor
More than a simple switch, but not an expensive monitor either, the 438D is a single-channel vibration monitor that can be located in a centralized location, remote from operating equipment. The 438D is on guard around the clock to provide cost-effective protection of motors, pumps, fans and a wide range of other rotating equipment. It provides continuous digital readout of the vibration level, and signals when a predetermined setpoint level is reached.
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Measurement mode | Velocity |
Frequency range | Dependent on tranducer type and any special filtering (See “Transducer Types” below) |
Analog output | 4 – 20 mA DC, proportional to full scale range |
Input power | 110V or 220V AC, field selectable |
Setpoints | 2, adjustable from 0-100% of full scale |
Indicators | LEDs: yellow for “Alarm”, red for “Trip”, green to indicate range |
438D operating temperature | -20 to +160F (-29 to +71C) |
Enclosure | NEMA 4, with hinged cover Dimensions: 9.5″H x 7″W x 4″D (24.1 x 17.8 x 10.2cm) |
Mounting | Flat surface, 8-3/4″ x 4″ (22.2 x 10.2cm) bolt pattern |
Cable entry | Transducer cable entry and cable grip provided; power and control cable entry by customer. |
Full scale range | 0 – 25 or 0 – 75 mm/sec |
Alarm & trip setpoints | 0 to 100% of full scale range |
Relay time delay | 0 to 20 sec. per relay |
Relay state | Normally de-energized (open below setpoint) or normally energized (closed below setpoint) |
Relay configuration | Latching or non-latching |
Relay inhibit | Inhibits relay operation during start-up or machine maintenance |
Input power | 110V or 220V AC |
4033-400 (Velocity) | Frequency range: 20 to 1,500 Hz |
4033-500 (Velocity) | Frequency range: 20 to 1,500 Hz |
4034 (Velocity) | Frequency range: 12 to 1,000 Hz |
4071A (Acceleration) | Frequency range: 2.1 to 3,500 Hz |
4073 (Acceleration) | Frequency range: 0.8 to 10,000 Hz |