The new BTM-400PLUS Belt Tension Meter or Sonic Tension Meter accuray 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.  Features
皮带张力计/ Trummeter
- 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
Photo Gallery
       
Typical Applications
External Probe Dimensions
 Complete Kit
The BTM-400PLUS is supplied as a complete kit, including: the gauge, plug-in and cable connected sensors, 9-volt battery, Instruction Manual – all in a foam-fitted, hard plastic carrying case. 
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 | | Operating Temperature | |
*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) andnatural 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. Downloads
 | BTM-400PLUS Belt Tension Meter / Trummeter - Data Sheet |
| BTM-400PLUS Belt Tension Meter / Trummeter - Instruction Manual |
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