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Provides contact information for technical support, calibration, and repair services globally.
Lists the essential accessories provided with the Fluke 931 Tachometer for various measurements.
Details the function of each key on the Tachometer's keypad for operation and selection.
Explains the various indicators and segments on the Tachometer's LCD display for readings and status.
Guides users on setting up the Tachometer for specific contact wheel sizes for surface speed measurements.
Provides step-by-step instructions for performing RPM measurements using the infrared beam.
Details the procedure for using the Tachometer with contact adapters for RPM measurements.
Explains how to measure surface speed and length using contact wheels and the device's range specifications.
Outlines the steps for attaching and using contact wheels for accurate surface measurements.
Describes how to access and interpret stored maximum, minimum, and average readings in memory.
Instructs users on how to safely replace the batteries when the low battery indicator is shown.
Presents detailed technical specifications for the Tachometer, including range, accuracy, and environmental limits.
Illustrates the basic steps for handling the Tachometer and its components.
Visually demonstrates the procedures for performing RPM measurements, both optical and contact.
Shows the visual steps required for replacing the batteries in the Tachometer.
Provides contact information for technical support, calibration, and repair services globally.
Lists the essential accessories provided with the Fluke 931 Tachometer for various measurements.
Details the function of each key on the Tachometer's keypad for operation and selection.
Explains the various indicators and segments on the Tachometer's LCD display for readings and status.
Guides users on setting up the Tachometer for specific contact wheel sizes for surface speed measurements.
Provides step-by-step instructions for performing RPM measurements using the infrared beam.
Details the procedure for using the Tachometer with contact adapters for RPM measurements.
Explains how to measure surface speed and length using contact wheels and the device's range specifications.
Outlines the steps for attaching and using contact wheels for accurate surface measurements.
Describes how to access and interpret stored maximum, minimum, and average readings in memory.
Instructs users on how to safely replace the batteries when the low battery indicator is shown.
Presents detailed technical specifications for the Tachometer, including range, accuracy, and environmental limits.
Illustrates the basic steps for handling the Tachometer and its components.
Visually demonstrates the procedures for performing RPM measurements, both optical and contact.
Shows the visual steps required for replacing the batteries in the Tachometer.
The Fluke 931 Tachometer is a versatile, hand-held instrument designed for accurately measuring rotational speed (Revolutions Per Minute - RPM), surface speed, and length. It offers both non-contact and contact measurement capabilities, making it suitable for a wide range of applications.
The primary function of the Fluke 931 Tachometer is to measure rotational speed and linear motion. It achieves this through two main modes:
Optical (Non-Contact) RPM Measurement: This mode utilizes an infrared beam to measure RPM without physical contact with the rotating object. To use this feature, a reflective strip is placed on the rotating device. The tachometer is then aimed at this strip from a distance of up to 500 mm (20 inches). When the infrared beam is triggered by the reflective strip, the device calculates and displays the RPM. This method is ideal for measuring the speed of moving parts where direct contact is difficult or unsafe.
Contact RPM, Surface Speed, and Length Measurement: For measurements requiring physical contact, the tachometer can be fitted with a mechanical adapter and various contact accessories.
The Fluke 931 Tachometer is designed for ease of use with a straightforward keypad and a clear display.
Keypad:
Display: The LCD display provides comprehensive information, including:
Configuration: Before taking surface speed measurements, the tachometer must be configured for the specific contact wheel being used (0.1 m or 6 inch circumference). This is done by turning the device on, pressing MEM and FUNC simultaneously, and then using FUNC to select the correct wheel size.
Memory Function: The memory feature is a significant advantage, allowing the device to store and display the maximum, minimum, average, and last readings from a series of measurements. This is particularly useful for monitoring variations in speed or length over time.
The primary maintenance feature for the Fluke 931 Tachometer involves battery replacement.
The device is designed for durability and ease of handling, ensuring reliable performance in various industrial and field settings. Regular cleaning of the reflective strip area on the rotating device is recommended for accurate optical measurements.
General| Temperature Range | 0 °C to 50 °C / 32 °F to 122 °F |
|---|---|
| Units | m/s, km/hr, ft/min, knots, mph, °C, °F |
| Display | LCD with backlight |
| Input Impedance | No data |
| Operating Temperature | 0 °C to 50 °C |
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