Fluke 931 Tachometer
Introduction:
The Fluke 931 Tachometer (the Tachometer) is a hand-held instrument that accurately measures rotational Revolutions Per Minute (RPM) or surface speed as well as length. Non-contact RPM measurements can be made using the Infrared Beam function, or contact RPM measurements using the mechanical adapter and selectable tip. The Memory function allows storing the maximum (MAX), minimum (MIN), average (AV), and last reading.
The following accessories are included with the Tachometer:
- 1m Contact Wheel
- 6 in Contact Wheel
- Cone Shaft Contact
- Internal Cone Shaft Contact
- Shaft Extension
- 10 Reflective Strips Specification:
| RMP | Range |
| Optical (non-contact) | 1 to 99999 RPM |
| Contact | 1 to 19999 RPM |
| Accuracy | ±0.02 % of reading + 1 digit |
| Sensing Distance (optical) | 500 mm (20 inches) |
| Battery Type | (2) AA 1.5 V LR6 (Alkaline) |
| Battery Life | approximately 40 hours |
| Operating Temperature | 0 to +50 ºC (32 to 122 ºF) |
| Storage Temperature | -20 to +70 ºC (0 to 160 ºF) |
| Weight | 250 g (0.55 lbs) |
| Size | 175 x 60 x 28 mm (7 x 2.5 x 1 inch) |
