Product Overview of the EPRO PR9268/201-000 Sensor

The EPRO PR9268/201-000 is a robust electrodynamic velocity sensor. Specifically, this device belongs to the PR9268 series from Emerson EPRO. It features a splash-proof housing for hostile environments. Consequently, the transducer operates reliably at temperatures up to 100°C. The PR9268/201-000 uses a vertical measuring direction. Therefore, it suits vertical machinery installations such as pumps, compressors, and vertical turbines. Furthermore, its robust construction permits use in radioactive environments with an optional oil-proof PTFE cover.

Measuring Capabilities and Performance

The EPRO PR9268/201-000 measures vibration amplitude at the nominal mounting position. Specifically, the range reaches 3000 µm peak-to-peak. Limit stops allow up to 4000 µm peak-to-peak. For reference, the PR9268/01x variant offers 500 µm peak-to-peak. Permissible acceleration in the measuring direction is 10 g peak-to-peak continuous. For short periods, it accepts 20 g peak-to-peak. In addition, permissible acceleration in the transverse direction is 2 g peak-to-peak. Consequently, this sensor handles demanding machinery vibration measurements with ease.

Frequency Response and Natural Frequency
The frequency range spans from 4 Hz to 1000 Hz. Therefore, it captures both low and high speed machinery vibrations effectively. The natural frequency is 4.5 Hz ±0.75 Hz at 20°C with a 100 kΩ load. As a result, this sensor performs well below typical machine running speeds.

Sensitivity and Linearity
The sensitivity rating is 28.5 mV per (mm/s) ±5 percent. This value holds at 20°C, 80 Hz, and 100 kΩ load. The linearity error of sensitivity stays below 2 percent. Consequently, the PR9268/201-000 provides accurate and repeatable measurements. The transverse sensitivity is 0.13 at 110 Hz for this vertical mounting version. In contrast, horizontal mounting versions have 0.27 at 110 Hz.

Damping Factor Performance
The damping factor is 0.56 at 20°C with a 100 kΩ load. At 100°C with the same load, the damping factor becomes 0.42. Therefore, temperature affects performance predictably. You must account for this deviation when defining trip limits.

Electrical Specifications

The resistance of the measuring circuit is 1875 Ω ±10 percent as a resistive load. Insulation resistance exceeds 1 MΩ at a test voltage of 500 V AC. Inductance stays below 90 mH. The capacity against the housing, including the cable without corrugated hose, is less than 1.2 nF. The recommended maximum lifting current for installation deviations is 1.8 mA. Specifically, the PR9268/201-000 allows up to 60 degrees deviation with sinking current.

Measuring Direction Deviation Tolerances

The EPRO PR9268/201-000 allows specific deviations from the nominal measuring direction. Without sinking current, the maximum deviation is ±30 degrees. With sinking current, the deviation extends to ±60 degrees. Therefore, this vertical sensor offers more installation flexibility than horizontal versions. As a result, you can achieve accurate measurements even when perfect vertical alignment is difficult.

Environmental and Temperature Ratings

Operating Temperature Range
The transducer without connector operates from -20°C to +100°C. For short periods under 4 hours, it can reach up to 120°C. If you use a connector, the range expands from -40°C to +125°C. Consequently, this sensor adapts to various installation needs across different industries.

Storage and Transport Temperature
For storage and transport without packing, the range is -40°C to +100°C. With packing, the range narrows to -40°C to +70°C. Therefore, always check the packing condition before long-term storage to avoid damage.

Protection and Materials
The protection class is IP55 per international standards. As a result, the housing resists dust and water jets effectively. The material is Al Mg Si Pb F28, which provides good corrosion resistance. The splash-proof housing permits use in hostile environments. Furthermore, an oil-proof PTFE covered metal protection hose is available for radioactive environments.

Cable and Connector Details

The EPRO PR9268/201-000 comes with an armored cable of 5 meters length. Specifically, the cable code A=1 indicates this 5-meter armored version. The cable end type is B00=000 with a HARTING connector. Specifically, the connector is a 6-pole Harting plug. A 6-pole socket is enclosed with the product. OPR or RAD options include an oil-proof PTFE covered metal protection hose. This option specifically suits radioactive environments.

Installation Guide for the PR9268/201-000

Before planning a measurement, follow these important guidelines.

• First, consider environmental conditions that might influence the measurement. For example, temperature, humidity, and aggressive substances all affect sensor performance.

• Always use a stiff and vibration-free sensor holder. Consequently, this prevents false readings from holder movement or resonance.

• Define a suitable measuring range in consultation with the plant operator. Specifically, do not make the range larger than necessary for your application.

• Define the trip limit together with the plant operator. Then, take measurement deviations into account when setting these limits for safe operation.

• Use a sensor that meets the requirements of your defined measuring range. The PR9268/201-000 suits most vertical industrial vibration applications.

• Ensure an EMC-compatible installation including the use of proper shielded cables.

• Finally, verify proper sensor function before activating the measurement in your production environment.

Installation Awareness for Vertical Mounting
The EPRO PR9268/201-000 is specifically designed for vertical measuring direction. Therefore, do not use this model for horizontal applications. For horizontal measurements, select the PR9268/300 series instead. This ensures optimal sensitivity and accuracy.

Packaging List for PR9268/201-000

The original box includes the following items.

• One EPRO PR9268/201-000 electrodynamic velocity sensor

• One 5-meter armored cable attached to the sensor

• One 6-pole Harting plug connector

• One 6-pole Harting socket (enclosed)

• One quick start guide with wiring diagrams

• One mounting instruction sheet

Weight Information

The net weight including cable, connector, and plug is approximately 930 grams. The transducer only weighs approximately 260 grams. With full packing, the gross weight is approximately 1200 grams (1.2 kg).

Common FAQs About This EPRO Sensor

What is the measuring range of the PR9268/201-000?
The EPRO PR9268/201-000 measures up to 3000 µm peak-to-peak. The limit stops allow up to 4000 µm peak-to-peak for transient protection.

What frequency range does this velocity sensor cover?
This sensor covers 4 Hz to 1000 Hz. Therefore, it suits most industrial rotating machinery from slow-speed turbines to high-speed compressors.

Is this sensor for vertical or horizontal mounting?
The PR9268/201-000 is specifically designed for vertical measuring direction. For horizontal applications, please order the PR9268/300 series instead.

Can I use this sensor in a radioactive environment?
Yes, with the optional oil-proof PTFE covered metal protection hose. This option is specifically designed for radioactive environments.

What is the operating temperature limit for this model?
The PR9268/201-000 without connector operates from -20°C to +100°C. For short periods under 4 hours, it tolerates up to 120°C. With a connector, the range expands to -40°C to +125°C.

What is the sensitivity of this velocity sensor?
The sensitivity is 28.5 mV per (mm/s) ±5 percent. This rating holds at 20°C, 80 Hz, and 100 kΩ load.

How much deviation from vertical is allowed?
The EPRO PR9268/201-000 allows ±30 degrees deviation without sinking current. With sinking current, it allows up to ±60 degrees deviation.