The Checkline BTM-400PLUS Belt Tension Meter, Sonic Tension Meter or Belt Frequency Meter also called a Sonic Tension Meter Includes two (2) separate Sensors – a plug-in type for one-handed operation and a cable-connected type for measuring belts with limited access space
Displays tension in hertz or newtons
Compact easy-to-use design
The Checkline BTM-400PLUS Belt Tension Meter or Sonic Tension Meter accurately measures the static tension of flat, V and ribbed belts of rubber, leather, fabric and composite materials by measuring the natural frequency (Hz) of a segment of the belt that has been tapped and then converting it into tension units of newtons (N) or pounds force (lbf).
The instrument uses a pulsed ruby red light source to measure the natural frequency of the vibrating belt. Unlike competitive models, the BTM-400PLUS is NOT affected by ambient noise, providing quick reliable results in all production and field applications
Kit Contents
- BTM-400PLUS Belt Tension Meter / Trummeter
- Plug-in and cable connected sensors
- 9-volt battery
- Instruction Manual
- Carrying case
Features
- Includes two (2) separate Sensors – a plug-in type for one-handed operation and a cable-connected type for measuring belts with limited access space
- Displays tension in newtons (N) or pounds force (lbf) or natural frequency in Hertz (Hz) - selectable
- Compact, easy-to-use design
- Displays Menu in English, German, Spanish, Portuguese, French or Italian & others - selectable
- Readings unaffected by nearby magnetic fields or noise
Specifications
| Measuring Range* | 3 - 800 Hz |
| Accuracy** | ± 5% or better |
| Sensing Distance*** | 0.200" - 1.6" (5 - 40 mm), typically (2.5"/60 mm max, depending upon ambient light & surface of belt to be measured) |
| Casing | ABS Plastic |
| Display | 2 line LCD, 16 character per line |
| Input Range | free span length: up to 9.990 m
belt mass: up to 9.999 kg/m |
| Power Supply | 9V battery |
- *BTM-400PLUS can measure up to 800 Hz, however most belts will break near 400Hz
- **Static tension (T) accuracy depends on the precision of entered values for free belt span (L), density (d) and natural frequency (f) of the vibrating free belt span, that has been plucked or struck, as noted in the relationship: T = 4dL2f2. Note that highest accuracy is achieved in the frequency mode where readings are accurate to <1%, ± 1 Hz.
- ***Sensing distance can be extended when ambient light level is low also by adding a piece of reflective tape in the "target area" of the belt.
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