Electrical tachometer and running hour meter
| Application | |||
| The instrument is suitable for measuring the revolution number of the motor crankshaft and summing up the engine operating hours at nominal RPM. At another RPM it counts proportionally more or less. | |||
| Description | |||
 This
instrument requires a transmitter. The instrument consists of a movement
built into an internal-illumination metall case coated against corrosion.
The transmitter is an A.C. generator supplying a voltage proportional
to the RPM of the engine crankshaft. It is upon effect of this voltage
that the pointer of the rectifier-type, moving coil-measuring instrument
deviates. The running hour meter is operated by the mechanical chopper
of the generator. On the scale the deviation of the pointer indicates
the RPM of the cranshaft. The counter sums the engine operating hours
up to 10 000 hours. |
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| Technical data: | |||
| Operating voltage: | 12 or 24V | ||
| Basic error in set measured in the percentual value of the max. scale value: | |||
| 500 – max. RPM-500 : | ±4% : | ||
| other values | ±5% | ||
| Additional error: | 0.5% / 10°C | ||
| Vibration proofness: | +5
dB on frequency range 25 -1000 Hz ( 0dB = g = 9.81 m/s2 ) |
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| Protection grade against the penetration of dust and splashing water: | |||
| front side: | IP 54 | ||
| other side: | IP 40 | ||
| electrical connection: | IP 00 | ||
| Temperature limits: | |||
| Operiting temperature: | - 25°C ... +65°C | ||
| Storage temper: | - 40 °C... +70°C | ||
| Mounting size: | o100 mm | ||
| Mass: | 0.6 kg | ||