General information to our products/FAQ
| Information for Accelerometer | |
| Accelerometer Basics |  |
| Commonly found g levels? | |
| How to Measure Vibration | |
| MEAS Silicon MEMS Piezoresistive Accelerometer and its Benefits |
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| Accelerometer self testing | |
| Guidedlines for Adhesive Mounting of Accelerometers | |
| Guidelines for Screw Mounting of Accelerometers | |
| Applications, Dynamic Measurement Vibration, Pressure, Force, Tilt |
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| Application Note: Model 1201 / 1201F: Ingress Protection - IP67 | |
This FAQ basedly on questions of our customers and is constantly updated.
- How can I test a sensor in the function?
Please absolutely avoid to test pressure sensors e.g. through pressures on the diaphragm or acceleormeters through „a knocking” on the table. The receivers are in most cases destroyed thereby or damaged at least and/or limited in the function by super elevated off sets.
Measure with the receiver concerned the offset, in and output impedances (with models without integrated amplifier) as well as the isolation. The results of these measurements give you information immediately over the condition of the sensors.
Accelerometers with low range you can test additionally the table measuring acceleration due to gravity and received thus already approximate information over the correct function mode. The sensors have an imprinted effect arrow. Put the receiver on the table, so that the arrow lies parallel to it. Attach supply voltage and wedge you a voltmeter to the output wires. They measure now the offset, which stabilizes after a few minutes to a value. If you turn the sensor now around 90°, to the imprinted arrow perpendicularly to the table (thus to the earth center shows), you measure acceleration due to gravity of 1g. This should the voltmeter according to the sensitivity of the receiver (e.g. 20mV/g) to indicate.
- What does one by the abbreviations or also designations in the specification of the manufacturers stand for?
| Damping | Absorption (with acceleration adaptors) The absorption is indicated in a value of 0 (undamped) to 1. One differentiates between air and Öldämpfung, whereby the latter is used with our sensors with a break-even factor of 0,7. |
| FS | FullScale (measuring range) |
| FSO | FullScaleOutput (output signal with max. measuring signal) |
| H | Hysteresis |
| NL | NonLineraity, deviation of the ideal characteristic |
| Offset | Zero shift and/or - offset (at the indicated temperature, usually 20°C). This is the output signal in the unloaded condition (pease consider gravidity when using acelerometers. The arrow on the housing shows the sensitive direction). This signal has a certain value, which is indicated in the specifications. Each sensor has a more or less large offset, which you should measure first also before the employment. Thermal offset: From connection of the supply a heating up of the sensor results. This causes again a change of the offset. They should wait from there with the attitude of the zero point, until the sensors warming up (appoximate value: approx. 15-20 minutes) |
| OT | Operating Temperature (operating temperature range) |
| Overrange stops | Mechanical overload attacks (acceleration us sensors) |
| CT | Compensated Temperature (compensated temperature range) |
| TS | Transverse Sensitivity (cross-axis sensitivity) |
| TSS | By this one understands the signal deviation at increasing temperature. Usually values in % of the FSO for each 50°C are indicated |